Prof. Dr. rer. nat. Dirk Staehle

• Utilizing Buffered YouTube Playtime for QoE-oriented Scheduling in OFDMA Networks. Wamser, Florian; Staehle, Dirk; Prokopec, Jan; Mäder, Andreas; Tran-Gia, Phuoc. In International Teletraffic Congress (ITC). Kraków, Poland, 2012.
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  With the introduction of 4th generation mobile networks, applications such as high-quality video streaming to the end user becomes possible. However, the expected demand for such services outpaces the capacity increase of the networks. Since there is mostly a capacity bottleneck in the air interface between a base station and user equipment, one of the main challenges for radio resource management is therefore to enforce precise quality guarantees for users with high expectations on service quality. We consider, in this paper, an OFDMA access network with YouTube users, and address the challenge of improving the quality of experience (QoE) of a dedicated user by utilizing the buffered playtime of a YouTube video for scheduling. The advantage of this approach is that scheduling is done according to the instantaneous throughput requirement of the end user application, and not by the network by maintaining average quality-of-service (QoS) parameters. The paper describes the concept and provides a simulative evaluation of the approach in an LTE network to demonstrate the benefits.

  @inproceedings{info3-inproceedings-2012-449, abstract = {With the introduction of 4th generation mobile networks, applications such as high-quality video streaming to the end user becomes possible. However, the expected demand for such services outpaces the capacity increase of the networks. Since there is mostly a capacity bottleneck in the air interface between a base station and user equipment, one of the main challenges for radio resource management is therefore to enforce precise quality guarantees for users with high expectations on service quality. We consider, in this paper, an OFDMA access network with YouTube users, and address the challenge of improving the quality of experience (QoE) of a dedicated user by utilizing the buffered playtime of a YouTube video for scheduling. The advantage of this approach is that scheduling is done according to the instantaneous throughput requirement of the end user application, and not by the network by maintaining average quality-of-service (QoS) parameters. The paper describes the concept and provides a simulative evaluation of the approach in an LTE network to demonstrate the benefits.}, address = {Kraków, Poland}, author = {Wamser, Florian and Staehle, Dirk and Prokopec, Jan and Mäder, Andreas and Tran-Gia, Phuoc}, booktitle = {International Teletraffic Congress (ITC)}, keywords = {demobenefit}, month = {09}, title = {Utilizing Buffered YouTube Playtime for QoE-oriented Scheduling in OFDMA Networks}, year = 2012 }

  %0 Conference Paper %1 info3-inproceedings-2012-449 %A Wamser, Florian %A Staehle, Dirk %A Prokopec, Jan %A Mäder, Andreas %A Tran-Gia, Phuoc %B International Teletraffic Congress (ITC) %C Kraków, Poland %D 2012 %T Utilizing Buffered YouTube Playtime for QoE-oriented Scheduling in OFDMA Networks %X With the introduction of 4th generation mobile networks, applications such as high-quality video streaming to the end user becomes possible. However, the expected demand for such services outpaces the capacity increase of the networks. Since there is mostly a capacity bottleneck in the air interface between a base station and user equipment, one of the main challenges for radio resource management is therefore to enforce precise quality guarantees for users with high expectations on service quality. We consider, in this paper, an OFDMA access network with YouTube users, and address the challenge of improving the quality of experience (QoE) of a dedicated user by utilizing the buffered playtime of a YouTube video for scheduling. The advantage of this approach is that scheduling is done according to the instantaneous throughput requirement of the end user application, and not by the network by maintaining average quality-of-service (QoS) parameters. The paper describes the concept and provides a simulative evaluation of the approach in an LTE network to demonstrate the benefits.
• Intra-Mesh Congestion Control for IEEE 802.11s Wireless Mesh Networks. Staehle, Barbara; Bahr, Michael; Fu, Desheng; Staehle, Dirk. In International Conference on Computer and Communication Networks 2012 (ICCCN 2012). Munich, Germany, 2012.
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  @inproceedings{info3-inproceedings-2012-453, address = {Munich, Germany}, author = {Staehle, Barbara and Bahr, Michael and Fu, Desheng and Staehle, Dirk}, booktitle = {International Conference on Computer and Communication Networks 2012 (ICCCN 2012)}, keywords = {sys:hidden:inproceedings}, month = {07}, title = {Intra-Mesh Congestion Control for IEEE 802.11s Wireless Mesh Networks}, year = 2012 }

  %0 Conference Paper %1 info3-inproceedings-2012-453 %A Staehle, Barbara %A Bahr, Michael %A Fu, Desheng %A Staehle, Dirk %B International Conference on Computer and Communication Networks 2012 (ICCCN 2012) %C Munich, Germany %D 2012 %T Intra-Mesh Congestion Control for IEEE 802.11s Wireless Mesh Networks
• Radio Resource Management Mechanisms for Broadband Wireless Access Networks. Technical Report (PhD dissertation), . Staehle, Dirk. PhD dissertation. University of Wuerzburg, 2012, June.
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  @phdthesis{info3-habilitation-2012-1, author = {Staehle, Dirk}, keywords = {sys:hidden:habilitation}, month = {06}, school = {University of Wuerzburg}, title = {Radio Resource Management Mechanisms for Broadband Wireless Access Networks}, year = 2012 }

  %0 Thesis %1 info3-habilitation-2012-1 %A Staehle, Dirk %D 2012 %T Radio Resource Management Mechanisms for Broadband Wireless Access Networks
• Quality of Experience Management for YouTube: Clouds, FoG and the AquareYoum. Hoßfeld, Tobias; Liers, Florian; Schatz, Raimund; Staehle, Barbara; Staehle, Dirk; Volkert, Thomas; Wamser, Florian. In PIK - Praxis der Informationverarbeitung und -kommunikation (PIK). 2012.
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  Over the last decade, Quality of Experience (QoE) has become a new, central paradigm for understanding the quality of networks and services. In particular, the concept has attracted the interest of communication network and service providers, since being able to guarantee good QoE to customers provides an opportunity for differentiation. In this paper we investigate the potential as well as the implementation challenges of QoE management in the Internet. Using YouTube video streaming service as example, we discuss the different elements that are required for the realization of the paradigm-shift towards truly user-centric network orchestration. To this end, we elaborate QoE management requirements for two complementary network scenarios (wireless mesh Internet access networks vs. global Internet delivery) and provide a QoE model for YouTube taking into account impairments like stalling and initial delay. We present two YouTube QoE monitoring approaches operating on the network and the end user level. Finally, we demonstrate how QoE can be dynamically optimized in both network scenarios with two exemplary concepts, AquareYoum and FoG, respectively. Our results show how QoE management can truly improve the user experience while at the same time increase the efficiency of network resource allocation.

  @article{info3-article-2012-103, abstract = {Over the last decade, Quality of Experience (QoE) has become a new, central paradigm for understanding the quality of networks and services. In particular, the concept has attracted the interest of communication network and service providers, since being able to guarantee good QoE to customers provides an opportunity for differentiation. In this paper we investigate the potential as well as the implementation challenges of QoE management in the Internet. Using YouTube video streaming service as example, we discuss the different elements that are required for the realization of the paradigm-shift towards truly user-centric network orchestration. To this end, we elaborate QoE management requirements for two complementary network scenarios (wireless mesh Internet access networks vs. global Internet delivery) and provide a QoE model for YouTube taking into account impairments like stalling and initial delay. We present two YouTube QoE monitoring approaches operating on the network and the end user level. Finally, we demonstrate how QoE can be dynamically optimized in both network scenarios with two exemplary concepts, AquareYoum and FoG, respectively. Our results show how QoE management can truly improve the user experience while at the same time increase the efficiency of network resource allocation.}, author = {Hoßfeld, Tobias and Liers, Florian and Schatz, Raimund and Staehle, Barbara and Staehle, Dirk and Volkert, Thomas and Wamser, Florian}, journal = {PIK - Praxis der Informationverarbeitung und -kommunikation (PIK)}, keywords = {sys:hidden:article}, month = {08}, title = {Quality of Experience Management for YouTube: Clouds, FoG and the AquareYoum}, year = 2012 }

  %0 Journal Article %1 info3-article-2012-103 %A Hoßfeld, Tobias %A Liers, Florian %A Schatz, Raimund %A Staehle, Barbara %A Staehle, Dirk %A Volkert, Thomas %A Wamser, Florian %D 2012 %J PIK - Praxis der Informationverarbeitung und -kommunikation (PIK) %T Quality of Experience Management for YouTube: Clouds, FoG and the AquareYoum %X Over the last decade, Quality of Experience (QoE) has become a new, central paradigm for understanding the quality of networks and services. In particular, the concept has attracted the interest of communication network and service providers, since being able to guarantee good QoE to customers provides an opportunity for differentiation. In this paper we investigate the potential as well as the implementation challenges of QoE management in the Internet. Using YouTube video streaming service as example, we discuss the different elements that are required for the realization of the paradigm-shift towards truly user-centric network orchestration. To this end, we elaborate QoE management requirements for two complementary network scenarios (wireless mesh Internet access networks vs. global Internet delivery) and provide a QoE model for YouTube taking into account impairments like stalling and initial delay. We present two YouTube QoE monitoring approaches operating on the network and the end user level. Finally, we demonstrate how QoE can be dynamically optimized in both network scenarios with two exemplary concepts, AquareYoum and FoG, respectively. Our results show how QoE management can truly improve the user experience while at the same time increase the efficiency of network resource allocation.

• Mitigating Unfairness in Locality-Aware Peer-to-Peer Networks. Lehrieder, Frank; Oechsner, Simon; Hoßfeld, Tobias; Staehle, Dirk; Despotovic, Zoran; Kellerer, Wolfgang; Michel, Maximilian. In International Journal of Network Management (IJNM), Special Issue on Economic Traffic Management, 21(1). 2011.
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  Locality-awareness is considered as a promising approach to increase the efficiency of content distribution by peer-to-peer (P2P) networks, e.g., BitTorrent. It is intended to reduce the inter-domain traffic which is costly for Internet service providers (ISPs) and to simultaneously increase the performance from the viewpoint of the P2P users, i.e., to shorten download times. This win-win situation should be achieved by a preferred exchange of information between peers which are located closely to each other in the underlying network topology. A set of studies shows that these approaches can lead to a win-win situation under certain conditions, and to a win-no lose situation in most cases. However, the scenarios used mostly assume homogeneous peer distributions. This is not the case in practice according to recent measurement studies. Therefore, we extend previous work in this paper by studying scenarios with real-life, skewed peer distributions. We show that even a win-no lose situation is difficult to achieve under those conditions and that the actual impact for a specific peer heavily depends on the used locality-aware peer selection and the specific scenario. This contradicts the principle of economic traffic management (ETM) which aims for a solution where all involved players benefit and consequently have an incentive to adopt locality-awareness. Therefore, we propose and evaluate refinements of current proposals, achieving that all users of P2P networks can be sure that their application performance is not reduced. This mitigates the unfairness introduced by current proposals which is a key requirement for a broad acceptance of the concept of locality-awareness in the user community of P2P networks.

  @article{info3-article-2011-82, abstract = {Locality-awareness is considered as a promising approach to increase the efficiency of content distribution by peer-to-peer (P2P) networks, e.g., BitTorrent. It is intended to reduce the inter-domain traffic which is costly for Internet service providers (ISPs) and to simultaneously increase the performance from the viewpoint of the P2P users, i.e., to shorten download times. This win-win situation should be achieved by a preferred exchange of information between peers which are located closely to each other in the underlying network topology. A set of studies shows that these approaches can lead to a win-win situation under certain conditions, and to a win-no lose situation in most cases. However, the scenarios used mostly assume homogeneous peer distributions. This is not the case in practice according to recent measurement studies. Therefore, we extend previous work in this paper by studying scenarios with real-life, skewed peer distributions. We show that even a win-no lose situation is difficult to achieve under those conditions and that the actual impact for a specific peer heavily depends on the used locality-aware peer selection and the specific scenario. This contradicts the principle of economic traffic management (ETM) which aims for a solution where all involved players benefit and consequently have an incentive to adopt locality-awareness. Therefore, we propose and evaluate refinements of current proposals, achieving that all users of P2P networks can be sure that their application performance is not reduced. This mitigates the unfairness introduced by current proposals which is a key requirement for a broad acceptance of the concept of locality-awareness in the user community of P2P networks.}, author = {Lehrieder, Frank and Oechsner, Simon and Hoßfeld, Tobias and Staehle, Dirk and Despotovic, Zoran and Kellerer, Wolfgang and Michel, Maximilian}, journal = {International Journal of Network Management (IJNM), Special Issue on Economic Traffic Management}, keywords = {sys:hidden:article}, month = {01}, title = {Mitigating Unfairness in Locality-Aware Peer-to-Peer Networks}, volume = {21(1)}, year = 2011 }

  %0 Journal Article %1 info3-article-2011-82 %A Lehrieder, Frank %A Oechsner, Simon %A Hoßfeld, Tobias %A Staehle, Dirk %A Despotovic, Zoran %A Kellerer, Wolfgang %A Michel, Maximilian %D 2011 %J International Journal of Network Management (IJNM), Special Issue on Economic Traffic Management %T Mitigating Unfairness in Locality-Aware Peer-to-Peer Networks %V 21(1) %X Locality-awareness is considered as a promising approach to increase the efficiency of content distribution by peer-to-peer (P2P) networks, e.g., BitTorrent. It is intended to reduce the inter-domain traffic which is costly for Internet service providers (ISPs) and to simultaneously increase the performance from the viewpoint of the P2P users, i.e., to shorten download times. This win-win situation should be achieved by a preferred exchange of information between peers which are located closely to each other in the underlying network topology. A set of studies shows that these approaches can lead to a win-win situation under certain conditions, and to a win-no lose situation in most cases. However, the scenarios used mostly assume homogeneous peer distributions. This is not the case in practice according to recent measurement studies. Therefore, we extend previous work in this paper by studying scenarios with real-life, skewed peer distributions. We show that even a win-no lose situation is difficult to achieve under those conditions and that the actual impact for a specific peer heavily depends on the used locality-aware peer selection and the specific scenario. This contradicts the principle of economic traffic management (ETM) which aims for a solution where all involved players benefit and consequently have an incentive to adopt locality-awareness. Therefore, we propose and evaluate refinements of current proposals, achieving that all users of P2P networks can be sure that their application performance is not reduced. This mitigates the unfairness introduced by current proposals which is a key requirement for a broad acceptance of the concept of locality-awareness in the user community of P2P networks.
• AquareYoum: Application and Quality of Experience-Aware Resource Management for YouTube in Wireless Mesh Networks. Staehle, Barbara; Wamser, Florian; Hirth, Matthias; Stezenbach, David; Staehle, Dirk. In PIK - Praxis der Informationsverarbeitung und Kommunikation. 2011.
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  The browser has become the users’ interface to a plethora of Internet applications which are accessible from nearly everywhere and every device. The price for the simple and cheap access over the Internet is often a reduced end-user quality of experience (QoE). The reason for this is that the network ignores the content of the packets it transports and thereby neither knows which services it supports, nor if and which quality requirements have to be given. In addition, the needs of the applications can be time varying, and the network might not be able to give strict quality guarantees. We therefore advocate the idea of an application-network interaction in order to dynamically adapt the network resources if a QoE degradation is imminent. The software suite AquareYoum implements this approach and enables a smooth YouTube video playback in a congested wireless mesh Internet access network by dynamically selecting the least congested Internet gateway.

  @article{info3-article-2011-85, abstract = {The browser has become the users’ interface to a plethora of Internet applications which are accessible from nearly everywhere and every device. The price for the simple and cheap access over the Internet is often a reduced end-user quality of experience (QoE). The reason for this is that the network ignores the content of the packets it transports and thereby neither knows which services it supports, nor if and which quality requirements have to be given. In addition, the needs of the applications can be time varying, and the network might not be able to give strict quality guarantees. We therefore advocate the idea of an application-network interaction in order to dynamically adapt the network resources if a QoE degradation is imminent. The software suite AquareYoum implements this approach and enables a smooth YouTube video playback in a congested wireless mesh Internet access network by dynamically selecting the least congested Internet gateway.}, author = {Staehle, Barbara and Wamser, Florian and Hirth, Matthias and Stezenbach, David and Staehle, Dirk}, journal = {PIK - Praxis der Informationsverarbeitung und Kommunikation}, keywords = {sys:hidden:article}, title = {AquareYoum: Application and Quality of Experience-Aware Resource Management for YouTube in Wireless Mesh Networks}, year = 2011 }

  %0 Journal Article %1 info3-article-2011-85 %A Staehle, Barbara %A Wamser, Florian %A Hirth, Matthias %A Stezenbach, David %A Staehle, Dirk %D 2011 %J PIK - Praxis der Informationsverarbeitung und Kommunikation %T AquareYoum: Application and Quality of Experience-Aware Resource Management for YouTube in Wireless Mesh Networks %X The browser has become the users’ interface to a plethora of Internet applications which are accessible from nearly everywhere and every device. The price for the simple and cheap access over the Internet is often a reduced end-user quality of experience (QoE). The reason for this is that the network ignores the content of the packets it transports and thereby neither knows which services it supports, nor if and which quality requirements have to be given. In addition, the needs of the applications can be time varying, and the network might not be able to give strict quality guarantees. We therefore advocate the idea of an application-network interaction in order to dynamically adapt the network resources if a QoE degradation is imminent. The software suite AquareYoum implements this approach and enables a smooth YouTube video playback in a congested wireless mesh Internet access network by dynamically selecting the least congested Internet gateway.
• Assessment of Economic Traffic Management of Overlay Traffic: Methodology and Results. Papafili, Ioanna; Stamoulis, George D.; Stankiewicz, Rafal; Oechsner, Simon; Pussep, Konstantin; Wojcik, Robert; Domzal, Jerzy; Staehle, Dirk; Lehrieder, Frank; Stiller, Burkhard. In Future Internet Assembly (FIA) Book: Future Internet Achievements and Promising Technology, J. D. et al. (ed.). Springer LNCS, 2011.
  • [ Abstract ]
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  Overlay applications generate huge amounts of traffic in the Internet, which determines a problem for Internet Service Providers, since it results in high charges for inter-domain traffic. Traditional traffic management techniques cannot deal successfully with overlay traffic. An incentive-based approach that employs economic concepts and mechanisms is required in order to deal with the overlay traffic in a way that is mutually beneficial for all stakeholders of the Future Internet. This TripleWin situation is the target of Economic Traffic Management (ETM). A wide variety of techniques are employed by ETM for optimizing overlay traffic management considering performance requirements of overlay and underlay networks together with cost implications for ISPs. However, the assessment of ETM requires an innovative methodology. In this article this methodology is described and major results are presented as obtained accordingly from the evaluation of different ETM mechanisms.

  @incollection{info3-incollection-2011-16, abstract = {Overlay applications generate huge amounts of traffic in the Internet, which determines a problem for Internet Service Providers, since it results in high charges for inter-domain traffic. Traditional traffic management techniques cannot deal successfully with overlay traffic. An incentive-based approach that employs economic concepts and mechanisms is required in order to deal with the overlay traffic in a way that is mutually beneficial for all stakeholders of the Future Internet. This TripleWin situation is the target of Economic Traffic Management (ETM). A wide variety of techniques are employed by ETM for optimizing overlay traffic management considering performance requirements of overlay and underlay networks together with cost implications for ISPs. However, the assessment of ETM requires an innovative methodology. In this article this methodology is described and major results are presented as obtained accordingly from the evaluation of different ETM mechanisms.}, author = {Papafili, Ioanna and Stamoulis, George D. and Stankiewicz, Rafal and Oechsner, Simon and Pussep, Konstantin and Wojcik, Robert and Domzal, Jerzy and Staehle, Dirk and Lehrieder, Frank and Stiller, Burkhard}, booktitle = {Future Internet Assembly (FIA) Book: Future Internet Achievements and Promising Technology}, editor = {et al., John Domingue}, keywords = {myown}, publisher = {Springer LNCS}, title = {Assessment of Economic Traffic Management of Overlay Traffic: Methodology and Results}, year = 2011 }

  %0 Book Section %1 info3-incollection-2011-16 %A Papafili, Ioanna %A Stamoulis, George D. %A Stankiewicz, Rafal %A Oechsner, Simon %A Pussep, Konstantin %A Wojcik, Robert %A Domzal, Jerzy %A Staehle, Dirk %A Lehrieder, Frank %A Stiller, Burkhard %B Future Internet Assembly (FIA) Book: Future Internet Achievements and Promising Technology %D 2011 %E et al., John Domingue %I Springer LNCS %T Assessment of Economic Traffic Management of Overlay Traffic: Methodology and Results %X Overlay applications generate huge amounts of traffic in the Internet, which determines a problem for Internet Service Providers, since it results in high charges for inter-domain traffic. Traditional traffic management techniques cannot deal successfully with overlay traffic. An incentive-based approach that employs economic concepts and mechanisms is required in order to deal with the overlay traffic in a way that is mutually beneficial for all stakeholders of the Future Internet. This TripleWin situation is the target of Economic Traffic Management (ETM). A wide variety of techniques are employed by ETM for optimizing overlay traffic management considering performance requirements of overlay and underlay networks together with cost implications for ISPs. However, the assessment of ETM requires an innovative methodology. In this article this methodology is described and major results are presented as obtained accordingly from the evaluation of different ETM mechanisms.
• On Max-Min Fair Flow Optimization in Wireless Mesh Networks. Pióro, Michał; Zotkiewicz, Mateusz; Staehle, Barbara; Staehle, Dirk; Yuan, Di. In Ad Hoc Networks, Special Issue on Models and Algorithms for Wireless Mesh Networks. 2011.
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  The paper is devoted to WMN modeling using mixed-integer programming (MIP) formulations that allow to precisely characterize the link data rate capacity and transmission scheduling within time slots. Such MIP models are formulated for several cases of the modulation and coding schemes (MCS) assignment. We present a general way of solving the MMF traffic objective for WMN and use it for the formulated capacity models. Thus the paper combines WMN radio link modeling with a non-standard way of dealing with uncertain traffic, a combination that has not been to our knowledge considered so far in terms of exact optimization models. This combination, involving integer programming, forms the main contribution of the paper. We discuss several ways of solving the considered MMF problems and present an extensive numerical study that illustrates the running time efficiency of the different solution approaches, and the in uence of the MCS selection options and the number of time slots on the traffic performance of a WMN.

  @article{info3-article-2011-84, abstract = {The paper is devoted to WMN modeling using mixed-integer programming (MIP) formulations that allow to precisely characterize the link data rate capacity and transmission scheduling within time slots. Such MIP models are formulated for several cases of the modulation and coding schemes (MCS) assignment. We present a general way of solving the MMF traffic objective for WMN and use it for the formulated capacity models. Thus the paper combines WMN radio link modeling with a non-standard way of dealing with uncertain traffic, a combination that has not been to our knowledge considered so far in terms of exact optimization models. This combination, involving integer programming, forms the main contribution of the paper. We discuss several ways of solving the considered MMF problems and present an extensive numerical study that illustrates the running time efficiency of the different solution approaches, and the in uence of the MCS selection options and the number of time slots on the traffic performance of a WMN.}, author = {Pióro, Michał and Zotkiewicz, Mateusz and Staehle, Barbara and Staehle, Dirk and Yuan, Di}, journal = {Ad Hoc Networks, Special Issue on Models and Algorithms for Wireless Mesh Networks}, keywords = {sys:hidden:article}, title = {On Max-Min Fair Flow Optimization in Wireless Mesh Networks}, year = 2011 }

  %0 Journal Article %1 info3-article-2011-84 %A Pióro, Michał %A Zotkiewicz, Mateusz %A Staehle, Barbara %A Staehle, Dirk %A Yuan, Di %D 2011 %J Ad Hoc Networks, Special Issue on Models and Algorithms for Wireless Mesh Networks %T On Max-Min Fair Flow Optimization in Wireless Mesh Networks %X The paper is devoted to WMN modeling using mixed-integer programming (MIP) formulations that allow to precisely characterize the link data rate capacity and transmission scheduling within time slots. Such MIP models are formulated for several cases of the modulation and coding schemes (MCS) assignment. We present a general way of solving the MMF traffic objective for WMN and use it for the formulated capacity models. Thus the paper combines WMN radio link modeling with a non-standard way of dealing with uncertain traffic, a combination that has not been to our knowledge considered so far in terms of exact optimization models. This combination, involving integer programming, forms the main contribution of the paper. We discuss several ways of solving the considered MMF problems and present an extensive numerical study that illustrates the running time efficiency of the different solution approaches, and the in uence of the MCS selection options and the number of time slots on the traffic performance of a WMN.
• Aquarema in Action: Improving the YouTube QoE in Wireless Mesh Networks. Staehle, Barbara; Hirth, Matthias; Pries, Rastin; Wamser, Florian; Staehle, Dirk. In Baltic Congress on Future Internet Communications (BCFIC). Riga, Latvia, 2011.
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  Internet access networks in general and wireless mesh access networks in particular, are the bottleneck of today’s communication networks and consequently most strongly responsible for determining the user satisfaction. The limited bandwidth and the fact that access network are most often used as mere bit pipes are however unfavorable for the users’ quality of experience (QoE). The lack of application-specific service guarantees is especially inadequate in the face of an increasing degree of heterogeneity of Internet applications and their individual service requirements. Application and quality of experience resource management, Aquarema for short, addresses this challenge by enabling application specific network resource management and thereby improves the user QoE. This is achieved by the interaction of application comfort (AC) monitoring tools, running at the clients, and a network advisor which may trigger different resource management tools. AC quantifies how well an application is running and in particular, enables a prediction of the user experience, thereby allowing the network advisor to act upon an imminent QoE degradation. We demonstrate the appeal of Aquarema at the example of YouTube video streaming in a congested IEEE 802.11 based mesh testbed where AC-aware traffic shaping guarantees the successful video playback.

  @inproceedings{info3-inproceedings-2011-403, abstract = {Internet access networks in general and wireless mesh access networks in particular, are the bottleneck of today’s communication networks and consequently most strongly responsible for determining the user satisfaction. The limited bandwidth and the fact that access network are most often used as mere bit pipes are however unfavorable for the users’ quality of experience (QoE). The lack of application-specific service guarantees is especially inadequate in the face of an increasing degree of heterogeneity of Internet applications and their individual service requirements. Application and quality of experience resource management, Aquarema for short, addresses this challenge by enabling application specific network resource management and thereby improves the user QoE. This is achieved by the interaction of application comfort (AC) monitoring tools, running at the clients, and a network advisor which may trigger different resource management tools. AC quantifies how well an application is running and in particular, enables a prediction of the user experience, thereby allowing the network advisor to act upon an imminent QoE degradation. We demonstrate the appeal of Aquarema at the example of YouTube video streaming in a congested IEEE 802.11 based mesh testbed where AC-aware traffic shaping guarantees the successful video playback.}, address = {Riga, Latvia}, author = {Staehle, Barbara and Hirth, Matthias and Pries, Rastin and Wamser, Florian and Staehle, Dirk}, booktitle = {Baltic Congress on Future Internet Communications (BCFIC)}, keywords = {demobenefit}, month = {02}, title = {Aquarema in Action: Improving the YouTube QoE in Wireless Mesh Networks}, year = 2011 }

  %0 Conference Paper %1 info3-inproceedings-2011-403 %A Staehle, Barbara %A Hirth, Matthias %A Pries, Rastin %A Wamser, Florian %A Staehle, Dirk %B Baltic Congress on Future Internet Communications (BCFIC) %C Riga, Latvia %D 2011 %T Aquarema in Action: Improving the YouTube QoE in Wireless Mesh Networks %X Internet access networks in general and wireless mesh access networks in particular, are the bottleneck of today’s communication networks and consequently most strongly responsible for determining the user satisfaction. The limited bandwidth and the fact that access network are most often used as mere bit pipes are however unfavorable for the users’ quality of experience (QoE). The lack of application-specific service guarantees is especially inadequate in the face of an increasing degree of heterogeneity of Internet applications and their individual service requirements. Application and quality of experience resource management, Aquarema for short, addresses this challenge by enabling application specific network resource management and thereby improves the user QoE. This is achieved by the interaction of application comfort (AC) monitoring tools, running at the clients, and a network advisor which may trigger different resource management tools. AC quantifies how well an application is running and in particular, enables a prediction of the user experience, thereby allowing the network advisor to act upon an imminent QoE degradation. We demonstrate the appeal of Aquarema at the example of YouTube video streaming in a congested IEEE 802.11 based mesh testbed where AC-aware traffic shaping guarantees the successful video playback.
• AquareYoum: Application and Quality of Experience-Aware Resource Management for YouTube in Wireless Mesh Networks. Staehle, Dirk; Staehle, Barbara; Wamser, Florian; Hirth, Matthias; Stezenbach, David; Deschner, Sebastian. Kiel, Germany, 2011, March.
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  @misc{info3-software-2011-5, address = {Kiel, Germany}, author = {Staehle, Dirk and Staehle, Barbara and Wamser, Florian and Hirth, Matthias and Stezenbach, David and Deschner, Sebastian}, booktitle = {PIK - Praxis der Informationsverarbeitung und Kommunikation}, keywords = {sys:hidden:software}, month = {03}, title = {AquareYoum: Application and Quality of Experience-Aware Resource Management for YouTube in Wireless Mesh Networks}, year = 2011 }

  %0 Generic %1 info3-software-2011-5 %A Staehle, Dirk %A Staehle, Barbara %A Wamser, Florian %A Hirth, Matthias %A Stezenbach, David %A Deschner, Sebastian %B PIK - Praxis der Informationsverarbeitung und Kommunikation %C Kiel, Germany %D 2011 %T AquareYoum: Application and Quality of Experience-Aware Resource Management for YouTube in Wireless Mesh Networks
• Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT. Staehle, Barbara; Wamser, Florian; Deschner, Sebastian; Blenk, Andreas; Staehle, Dirk; Hahm, Oliver; Schmittberger, Nicolai; Günes, Mesut. In Euroview 2011. Würzburg, Germany, 2011.
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  @inproceedings{info3-inproceedings-2011-425, address = {Würzburg, Germany}, author = {Staehle, Barbara and Wamser, Florian and Deschner, Sebastian and Blenk, Andreas and Staehle, Dirk and Hahm, Oliver and Schmittberger, Nicolai and Günes, Mesut}, booktitle = {Euroview 2011}, keywords = {demobenefit}, month = {08}, title = {Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT}, year = 2011 }

  %0 Conference Paper %1 info3-inproceedings-2011-425 %A Staehle, Barbara %A Wamser, Florian %A Deschner, Sebastian %A Blenk, Andreas %A Staehle, Dirk %A Hahm, Oliver %A Schmittberger, Nicolai %A Günes, Mesut %B Euroview 2011 %C Würzburg, Germany %D 2011 %T Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT
• Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT. Staehle, Barbara; Wamser, Florian; Deschner, Sebastian; Blenk, Andreas; Staehle, Dirk; Hahm, Oliver; Schmittberger, Nicolai; Günes, Mesut. Würzburg, Germany, 2011, August.
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  @misc{info3-software-2011-9, address = {Würzburg, Germany}, author = {Staehle, Barbara and Wamser, Florian and Deschner, Sebastian and Blenk, Andreas and Staehle, Dirk and Hahm, Oliver and Schmittberger, Nicolai and Günes, Mesut}, booktitle = {EuroView2011}, keywords = {sys:hidden:software}, month = {08}, title = {Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT}, year = 2011 }

  %0 Generic %1 info3-software-2011-9 %A Staehle, Barbara %A Wamser, Florian %A Deschner, Sebastian %A Blenk, Andreas %A Staehle, Dirk %A Hahm, Oliver %A Schmittberger, Nicolai %A Günes, Mesut %B EuroView2011 %C Würzburg, Germany %D 2011 %T Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

• YoMo: A YouTube Application Comfort Monitoring Tool. Staehle, Barbara; Hirth, Matthias; Pries, Rastin; Wamser, Florian; Staehle, Dirk. In New Dimensions in the Assessment and Support of Quality of Experience for Multimedia Applications. Tampere, Finland, 2010.
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  Out of the large number of multimedia content sharing platforms YouTube is the most popular one. This is reflected by the large number of studies which focus on analyzing YouTube characteristics. Techniques for quantifying the instantaneous YouTube QoE and predicting an imminent QoE degradation have in contrast never been proposed. The latter task is even more important if network management actions shall be carried out to avoid a YouTube QoE degradation. In this work we describe YoMo, a tool which constantly monitors the YouTube application comfort. This measure quantifies the application operation condition and allows a QoE prediction. Experiments show that YoMo is able to exactly anticipate an upcoming YouTube QoE degradation.

  @inproceedings{info3-inproceedings-2010-376, abstract = {Out of the large number of multimedia content sharing platforms YouTube is the most popular one. This is reflected by the large number of studies which focus on analyzing YouTube characteristics. Techniques for quantifying the instantaneous YouTube QoE and predicting an imminent QoE degradation have in contrast never been proposed. The latter task is even more important if network management actions shall be carried out to avoid a YouTube QoE degradation. In this work we describe YoMo, a tool which constantly monitors the YouTube application comfort. This measure quantifies the application operation condition and allows a QoE prediction. Experiments show that YoMo is able to exactly anticipate an upcoming YouTube QoE degradation.}, address = {Tampere, Finland}, author = {Staehle, Barbara and Hirth, Matthias and Pries, Rastin and Wamser, Florian and Staehle, Dirk}, booktitle = {New Dimensions in the Assessment and Support of Quality of Experience for Multimedia Applications}, keywords = {demobenefit}, month = {06}, title = {YoMo: A YouTube Application Comfort Monitoring Tool}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-376 %A Staehle, Barbara %A Hirth, Matthias %A Pries, Rastin %A Wamser, Florian %A Staehle, Dirk %B New Dimensions in the Assessment and Support of Quality of Experience for Multimedia Applications %C Tampere, Finland %D 2010 %T YoMo: A YouTube Application Comfort Monitoring Tool %X Out of the large number of multimedia content sharing platforms YouTube is the most popular one. This is reflected by the large number of studies which focus on analyzing YouTube characteristics. Techniques for quantifying the instantaneous YouTube QoE and predicting an imminent QoE degradation have in contrast never been proposed. The latter task is even more important if network management actions shall be carried out to avoid a YouTube QoE degradation. In this work we describe YoMo, a tool which constantly monitors the YouTube application comfort. This measure quantifies the application operation condition and allows a QoE prediction. Experiments show that YoMo is able to exactly anticipate an upcoming YouTube QoE degradation.
• QoE based Bandwidth Management Supporting Real Time Flows in IEEE 802.11 Mesh Networks. Pries, Rastin; Hock, David; Staehle, Dirk. In PIK - Praxis der Informationsverarbeitung und Kommunikation, 32. 2010.
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  @article{info3-article-2010-64, author = {Pries, Rastin and Hock, David and Staehle, Dirk}, journal = {PIK - Praxis der Informationsverarbeitung und Kommunikation}, keywords = {sys:hidden:article}, month = {01}, title = {QoE based Bandwidth Management Supporting Real Time Flows in IEEE 802.11 Mesh Networks}, volume = 32, year = 2010 }

  %0 Journal Article %1 info3-article-2010-64 %A Pries, Rastin %A Hock, David %A Staehle, Dirk %D 2010 %J PIK - Praxis der Informationsverarbeitung und Kommunikation %T QoE based Bandwidth Management Supporting Real Time Flows in IEEE 802.11 Mesh Networks %V 32
• YoMo: A YouTube Application Comfort Monitoring Tool. Technical Report (467), . Staehle, Barbara; Hirth, Matthias; Wamser, Florian; Pries, Rastin; Staehle, Dirk. University of Wuerzburg, 2010.
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  @techreport{info3-techreport-2010-247, author = {Staehle, Barbara and Hirth, Matthias and Wamser, Florian and Pries, Rastin and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {03}, number = 467, title = {YoMo: A YouTube Application Comfort Monitoring Tool}, year = 2010 }

  %0 Report %1 info3-techreport-2010-247 %A Staehle, Barbara %A Hirth, Matthias %A Wamser, Florian %A Pries, Rastin %A Staehle, Dirk %D 2010 %N 467 %T YoMo: A YouTube Application Comfort Monitoring Tool
• Effects of Link Rate Assignment in IEEE 802.11 Mesh Networks. Staehle, Barbara; Staehle, Dirk; Pries, Rastin. In 16th European Wireless Conference. Lucca, Italy, 2010.
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  The IEEE 802.11 standard supports a variety of modulation and coding schemes (MCSs). In 802.11-based wireless mesh networks (WMNs) it is hence possible to adapt the link rate to the channel conditions. In particular, smaller link rates may be accepted for an increased spatial reuse. In an earlier study, we showed that this effect is suitable for increasing the max-min fair share throughput in a WMN operating with a TDMA channel access scheme. In this work, we investigate if the use of smaller link rates is also suitable for increasing the throughput of a WMN using a contention-based channel access mechanism. For this purpose, we analytically derive a guideline for link rate assignment as protection against hidden nodes and compute the costs and benefits of this mechanism in terms of MAC layer efficiency. A simulation study shows however that in a medium sized WMN this strategy is less advantageous than assumed and allows to give advices for practical mesh network deployments.

  @inproceedings{info3-inproceedings-2010-371, abstract = {The IEEE 802.11 standard supports a variety of modulation and coding schemes (MCSs). In 802.11-based wireless mesh networks (WMNs) it is hence possible to adapt the link rate to the channel conditions. In particular, smaller link rates may be accepted for an increased spatial reuse. In an earlier study, we showed that this effect is suitable for increasing the max-min fair share throughput in a WMN operating with a TDMA channel access scheme. In this work, we investigate if the use of smaller link rates is also suitable for increasing the throughput of a WMN using a contention-based channel access mechanism. For this purpose, we analytically derive a guideline for link rate assignment as protection against hidden nodes and compute the costs and benefits of this mechanism in terms of MAC layer efficiency. A simulation study shows however that in a medium sized WMN this strategy is less advantageous than assumed and allows to give advices for practical mesh network deployments.}, address = {Lucca, Italy}, author = {Staehle, Barbara and Staehle, Dirk and Pries, Rastin}, booktitle = {16th European Wireless Conference}, keywords = {sys:hidden:inproceedings}, month = {04}, title = {Effects of Link Rate Assignment in IEEE 802.11 Mesh Networks}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-371 %A Staehle, Barbara %A Staehle, Dirk %A Pries, Rastin %B 16th European Wireless Conference %C Lucca, Italy %D 2010 %T Effects of Link Rate Assignment in IEEE 802.11 Mesh Networks %X The IEEE 802.11 standard supports a variety of modulation and coding schemes (MCSs). In 802.11-based wireless mesh networks (WMNs) it is hence possible to adapt the link rate to the channel conditions. In particular, smaller link rates may be accepted for an increased spatial reuse. In an earlier study, we showed that this effect is suitable for increasing the max-min fair share throughput in a WMN operating with a TDMA channel access scheme. In this work, we investigate if the use of smaller link rates is also suitable for increasing the throughput of a WMN using a contention-based channel access mechanism. For this purpose, we analytically derive a guideline for link rate assignment as protection against hidden nodes and compute the costs and benefits of this mechanism in terms of MAC layer efficiency. A simulation study shows however that in a medium sized WMN this strategy is less advantageous than assumed and allows to give advices for practical mesh network deployments.
• Optimization models for mesh networks involving max-min fairness. Pióro, Michał; Staehle, Barbara; Staehle, Dirk; Yuan, Di. University of Wuerzburg, 2010.
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  @techreport{info3-techreport-2010-255, author = {Pióro, Michał and Staehle, Barbara and Staehle, Dirk and Yuan, Di}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, title = {Optimization models for mesh networks involving max-min fairness}, year = 2010 }

  %0 Report %1 info3-techreport-2010-255 %A Pióro, Michał %A Staehle, Barbara %A Staehle, Dirk %A Yuan, Di %D 2010 %T Optimization models for mesh networks involving max-min fairness
• Soft Frequency Reuse in the Uplink of an OFDMA Network. Wamser, Florian; Mittelstädt, David; Staehle, Dirk. In IEEE VTC Spring 10. Taipei, Taiwan, 2010.
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  The challenges with deploying a static frequency reuse OFDMA mobile communication network in an interference limited environment is that for highly loaded cells, significant regions of coverage will experience high interference levels, resulting in unserviceable low signal-to-interference values. Therefore, interference mitigation approaches as adaptive fractional frequency reuse are considered to tackle the problem. In this paper, different strategies for user and resource allocation are evaluated along with fractional frequency reuse schemes. In contrast to downlink scenarios, we investigate the performance of the OFDMA uplink. It is shown that soft frequency reuse is well-performing in the uplink although it is easy to deploy since it does not rely on resource coordination.

  @inproceedings{info3-inproceedings-2010-370, abstract = {The challenges with deploying a static frequency reuse OFDMA mobile communication network in an interference limited environment is that for highly loaded cells, significant regions of coverage will experience high interference levels, resulting in unserviceable low signal-to-interference values. Therefore, interference mitigation approaches as adaptive fractional frequency reuse are considered to tackle the problem. In this paper, different strategies for user and resource allocation are evaluated along with fractional frequency reuse schemes. In contrast to downlink scenarios, we investigate the performance of the OFDMA uplink. It is shown that soft frequency reuse is well-performing in the uplink although it is easy to deploy since it does not rely on resource coordination.}, address = {Taipei, Taiwan}, author = {Wamser, Florian and Mittelstädt, David and Staehle, Dirk}, booktitle = {IEEE VTC Spring 10}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {Soft Frequency Reuse in the Uplink of an OFDMA Network}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-370 %A Wamser, Florian %A Mittelstädt, David %A Staehle, Dirk %B IEEE VTC Spring 10 %C Taipei, Taiwan %D 2010 %T Soft Frequency Reuse in the Uplink of an OFDMA Network %X The challenges with deploying a static frequency reuse OFDMA mobile communication network in an interference limited environment is that for highly loaded cells, significant regions of coverage will experience high interference levels, resulting in unserviceable low signal-to-interference values. Therefore, interference mitigation approaches as adaptive fractional frequency reuse are considered to tackle the problem. In this paper, different strategies for user and resource allocation are evaluated along with fractional frequency reuse schemes. In contrast to downlink scenarios, we investigate the performance of the OFDMA uplink. It is shown that soft frequency reuse is well-performing in the uplink although it is easy to deploy since it does not rely on resource coordination.
• Traffic characterization of a residential wireless Internet access. Wamser, Florian; Pries, Rastin; Staehle, Dirk; Heck, Klaus; Tran-Gia, Phuoc. In Special Issue of the Telecommunication Systems (TS) Journal, 48: 1-2. 2010.
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  Traffic characterization is an important means for Internet Service Providers (ISPs) to adapt and to optimize their networks to the requirements of the customers. Most network measurements are performed in the backbone of these ISPs, showing both, residential and business Internet traffic. However, the traffic characteristics of business and home users differ significantly. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect only home user traffic characteristics. In this paper, we present the results of these measurements, showing daily traffic fluctuations, flow statistics as well as application distributions. The results show a difference to backbone traffic characteristics. Furthermore, we observed a shift from web and Peer-to-Peer (P2P) file sharing traffic to streaming applications.

  @article{info3-article-2010-73, abstract = {Traffic characterization is an important means for Internet Service Providers (ISPs) to adapt and to optimize their networks to the requirements of the customers. Most network measurements are performed in the backbone of these ISPs, showing both, residential and business Internet traffic. However, the traffic characteristics of business and home users differ significantly. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect only home user traffic characteristics. In this paper, we present the results of these measurements, showing daily traffic fluctuations, flow statistics as well as application distributions. The results show a difference to backbone traffic characteristics. Furthermore, we observed a shift from web and Peer-to-Peer (P2P) file sharing traffic to streaming applications.}, author = {Wamser, Florian and Pries, Rastin and Staehle, Dirk and Heck, Klaus and Tran-Gia, Phuoc}, journal = {Special Issue of the Telecommunication Systems (TS) Journal}, keywords = {sys:hidden:article}, month = {05}, title = {Traffic characterization of a residential wireless Internet access}, volume = {48: 1-2}, year = 2010 }

  %0 Journal Article %1 info3-article-2010-73 %A Wamser, Florian %A Pries, Rastin %A Staehle, Dirk %A Heck, Klaus %A Tran-Gia, Phuoc %D 2010 %J Special Issue of the Telecommunication Systems (TS) Journal %T Traffic characterization of a residential wireless Internet access %V 48: 1-2 %X Traffic characterization is an important means for Internet Service Providers (ISPs) to adapt and to optimize their networks to the requirements of the customers. Most network measurements are performed in the backbone of these ISPs, showing both, residential and business Internet traffic. However, the traffic characteristics of business and home users differ significantly. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect only home user traffic characteristics. In this paper, we present the results of these measurements, showing daily traffic fluctuations, flow statistics as well as application distributions. The results show a difference to backbone traffic characteristics. Furthermore, we observed a shift from web and Peer-to-Peer (P2P) file sharing traffic to streaming applications.
• QoE Prediction for Radio Resource Management. Hirth, Matthias; Staehle, Barbara; Wamser, Florian; Pries, Rastin; Staehle, Dirk. In The 6th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities (TridentCom 2010). Berlin, Germany, 2010.
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  In this paper, we introduce a monitoring tool which measures application-specific parameters. These parameters are used to predict the QoE and to perform resource management based on QoE thresholds. We demonstrate the tool for YouTube traffic in an IEEE 802.11 mesh network. Thereby, the QoE is based on the player video buffer size and the resource management can include rerouting, throttling of best effort traffic, or a gateway handover.

  @inproceedings{info3-inproceedings-2010-384, abstract = {In this paper, we introduce a monitoring tool which measures application-specific parameters. These parameters are used to predict the QoE and to perform resource management based on QoE thresholds. We demonstrate the tool for YouTube traffic in an IEEE 802.11 mesh network. Thereby, the QoE is based on the player video buffer size and the resource management can include rerouting, throttling of best effort traffic, or a gateway handover.}, address = {Berlin, Germany}, author = {Hirth, Matthias and Staehle, Barbara and Wamser, Florian and Pries, Rastin and Staehle, Dirk}, booktitle = {The 6th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities (TridentCom 2010)}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {QoE Prediction for Radio Resource Management}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-384 %A Hirth, Matthias %A Staehle, Barbara %A Wamser, Florian %A Pries, Rastin %A Staehle, Dirk %B The 6th International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities (TridentCom 2010) %C Berlin, Germany %D 2010 %T QoE Prediction for Radio Resource Management %X In this paper, we introduce a monitoring tool which measures application-specific parameters. These parameters are used to predict the QoE and to perform resource management based on QoE thresholds. We demonstrate the tool for YouTube traffic in an IEEE 802.11 mesh network. Thereby, the QoE is based on the player video buffer size and the resource management can include rerouting, throttling of best effort traffic, or a gateway handover.
• A Policy-Based Vertical Handover System. Technical Report (471), . Pries, Rastin; Staehle, Dirk; Hock, David; Hirth, Matthias. University of Wuerzburg, 2010.
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  @techreport{info3-techreport-2010-251, author = {Pries, Rastin and Staehle, Dirk and Hock, David and Hirth, Matthias}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {05}, number = 471, title = {A Policy-Based Vertical Handover System}, year = 2010 }

  %0 Report %1 info3-techreport-2010-251 %A Pries, Rastin %A Staehle, Dirk %A Hock, David %A Hirth, Matthias %D 2010 %N 471 %T A Policy-Based Vertical Handover System
• Max-Min Fair Throughput in Multi-Gateway Multi-Rate Mesh Networks. Staehle, Dirk; Staehle, Barbara; Pries, Rastin. In IEEE VTC Spring 10. Taipei, Taiwan, 2010.
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  The problem how to determine the capacity of and achieve fairness in mesh networks is one of the key topics in practical and theoretical research on mesh networks. Max-min fairness is one way to define fairness and several algorithms how to compute max-min fair rate allocations are already published. In this paper we make two major contributions to this area of research: First, we formulate an algorithm achieving max-min fairness among end-to-end flows based on the effective load of a collision domain. This allows us to determine max-min fair rate allocations in a multi-gateway, multi-channel mesh network with equal rates for all links. Second, we extend this algorithm for heterogeneous link rates.

  @inproceedings{info3-inproceedings-2010-367, abstract = {The problem how to determine the capacity of and achieve fairness in mesh networks is one of the key topics in practical and theoretical research on mesh networks. Max-min fairness is one way to define fairness and several algorithms how to compute max-min fair rate allocations are already published. In this paper we make two major contributions to this area of research: First, we formulate an algorithm achieving max-min fairness among end-to-end flows based on the effective load of a collision domain. This allows us to determine max-min fair rate allocations in a multi-gateway, multi-channel mesh network with equal rates for all links. Second, we extend this algorithm for heterogeneous link rates.}, address = {Taipei, Taiwan}, author = {Staehle, Dirk and Staehle, Barbara and Pries, Rastin}, booktitle = {IEEE VTC Spring 10}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {Max-Min Fair Throughput in Multi-Gateway Multi-Rate Mesh Networks}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-367 %A Staehle, Dirk %A Staehle, Barbara %A Pries, Rastin %B IEEE VTC Spring 10 %C Taipei, Taiwan %D 2010 %T Max-Min Fair Throughput in Multi-Gateway Multi-Rate Mesh Networks %X The problem how to determine the capacity of and achieve fairness in mesh networks is one of the key topics in practical and theoretical research on mesh networks. Max-min fairness is one way to define fairness and several algorithms how to compute max-min fair rate allocations are already published. In this paper we make two major contributions to this area of research: First, we formulate an algorithm achieving max-min fairness among end-to-end flows based on the effective load of a collision domain. This allows us to determine max-min fair rate allocations in a multi-gateway, multi-channel mesh network with equal rates for all links. Second, we extend this algorithm for heterogeneous link rates.
• Starting Up Multi-Gateway WSNs. Staehle, Barbara; Staehle, Dirk. In 6th International Wireless Communications and Mobile Computing Conference. Caen, France, 2010.
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  The Internet connection of wireless sensor networks (WSNs) is in general assured by more than one gateway. Planning or optimizing such multi-gateway WSNs (MWSNs) has lately been the focus of the research community. For this purpose, most researchers assume that each sensor node knows about a path to each gateway node. The question how a MWSN can be efficiently started up, i.e. how the sensor nodes learn about the gateways has in contrast not yet been studied thoroughly. To close this gap, we formally describe the problem of starting up a MWSN and demonstrate the importance of optimizing the start-up phase by comparing the performance of an optimal solution to the performance of less efficient distributed algorithms.

  @inproceedings{info3-inproceedings-2010-372, abstract = {The Internet connection of wireless sensor networks (WSNs) is in general assured by more than one gateway. Planning or optimizing such multi-gateway WSNs (MWSNs) has lately been the focus of the research community. For this purpose, most researchers assume that each sensor node knows about a path to each gateway node. The question how a MWSN can be efficiently started up, i.e. how the sensor nodes learn about the gateways has in contrast not yet been studied thoroughly. To close this gap, we formally describe the problem of starting up a MWSN and demonstrate the importance of optimizing the start-up phase by comparing the performance of an optimal solution to the performance of less efficient distributed algorithms.}, address = {Caen, France}, author = {Staehle, Barbara and Staehle, Dirk}, booktitle = {6th International Wireless Communications and Mobile Computing Conference}, keywords = {sys:hidden:inproceedings}, month = {06}, title = {Starting Up Multi-Gateway WSNs}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-372 %A Staehle, Barbara %A Staehle, Dirk %B 6th International Wireless Communications and Mobile Computing Conference %C Caen, France %D 2010 %T Starting Up Multi-Gateway WSNs %X The Internet connection of wireless sensor networks (WSNs) is in general assured by more than one gateway. Planning or optimizing such multi-gateway WSNs (MWSNs) has lately been the focus of the research community. For this purpose, most researchers assume that each sensor node knows about a path to each gateway node. The question how a MWSN can be efficiently started up, i.e. how the sensor nodes learn about the gateways has in contrast not yet been studied thoroughly. To close this gap, we formally describe the problem of starting up a MWSN and demonstrate the importance of optimizing the start-up phase by comparing the performance of an optimal solution to the performance of less efficient distributed algorithms.
• Improving YouTube QoE in Wireless Mesh Networks. Staehle, Barbara; Hirth, Matthias; Wamser, Florian; Pries, Rastin; Staehle, Dirk. 2010, June.
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  @misc{info3-poster-2010-23, author = {Staehle, Barbara and Hirth, Matthias and Wamser, Florian and Pries, Rastin and Staehle, Dirk}, booktitle = {5. Fachgespräch der GI/ITG-Fachgruppe "Kommunikation und Verteilte Systeme"}, keywords = {demobenefit}, month = {06}, title = {Improving YouTube QoE in Wireless Mesh Networks}, year = 2010 }

  %0 Generic %1 info3-poster-2010-23 %A Staehle, Barbara %A Hirth, Matthias %A Wamser, Florian %A Pries, Rastin %A Staehle, Dirk %B 5. Fachgespräch der GI/ITG-Fachgruppe "Kommunikation und Verteilte Systeme" %D 2010 %T Improving YouTube QoE in Wireless Mesh Networks
• Overlay Connection Usage in BitTorrent Swarms. Oechsner, Simon; Lehrieder, Frank; Staehle, Dirk. In 3rd Workshop on Economic Traffic Management. Collocated with 22nd International Teletraffic Congress (ITC 22), Amsterdam, Netherlands, 2010.
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  The amount of peer-to-peer (P2P) traffic and its inefficient utilization of network resources make it a high priority for traffic management. Due to the distributed nature of P2P overlays, a promising approach for a management scheme is to change the client behavior and its utilization of overlay connections. However, from the viewpoint of a client, there are different categories of overlay connections. In this paper, we discern between these different types of overlay connections in BitTorrent, the currently most popular P2P file-sharing application. A simulation study of BitTorrent and a video-streaming derivate called Tribler provides insights into the usage of these types of connections for data exchange. Thus, traffic management based on client behavior can be optimized by efficiently targeting connections which carry the most traffic. We also show the implications of these results for locality-awareness mechanisms such as Biased Neighbor Selection and Biased Unchoking.

  @inproceedings{info3-inproceedings-2010-386, abstract = {The amount of peer-to-peer (P2P) traffic and its inefficient utilization of network resources make it a high priority for traffic management. Due to the distributed nature of P2P overlays, a promising approach for a management scheme is to change the client behavior and its utilization of overlay connections. However, from the viewpoint of a client, there are different categories of overlay connections. In this paper, we discern between these different types of overlay connections in BitTorrent, the currently most popular P2P file-sharing application. A simulation study of BitTorrent and a video-streaming derivate called Tribler provides insights into the usage of these types of connections for data exchange. Thus, traffic management based on client behavior can be optimized by efficiently targeting connections which carry the most traffic. We also show the implications of these results for locality-awareness mechanisms such as Biased Neighbor Selection and Biased Unchoking.}, address = {Collocated with 22nd International Teletraffic Congress (ITC 22), Amsterdam, Netherlands}, author = {Oechsner, Simon and Lehrieder, Frank and Staehle, Dirk}, booktitle = {3rd Workshop on Economic Traffic Management}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Overlay Connection Usage in BitTorrent Swarms}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-386 %A Oechsner, Simon %A Lehrieder, Frank %A Staehle, Dirk %B 3rd Workshop on Economic Traffic Management %C Collocated with 22nd International Teletraffic Congress (ITC 22), Amsterdam, Netherlands %D 2010 %T Overlay Connection Usage in BitTorrent Swarms %X The amount of peer-to-peer (P2P) traffic and its inefficient utilization of network resources make it a high priority for traffic management. Due to the distributed nature of P2P overlays, a promising approach for a management scheme is to change the client behavior and its utilization of overlay connections. However, from the viewpoint of a client, there are different categories of overlay connections. In this paper, we discern between these different types of overlay connections in BitTorrent, the currently most popular P2P file-sharing application. A simulation study of BitTorrent and a video-streaming derivate called Tribler provides insights into the usage of these types of connections for data exchange. Thus, traffic management based on client behavior can be optimized by efficiently targeting connections which carry the most traffic. We also show the implications of these results for locality-awareness mechanisms such as Biased Neighbor Selection and Biased Unchoking.
• Advanced Interference Mitigation with Frequency Reuse Schemes in the IEEE 802.16m Uplink. Wamser, Florian; Mittelstädt, David; Staehle, Dirk; Tran-Gia, Phuoc. In ACM MSWIM 2010, pp. 132–139. Bodrum, Turkey, 2010.
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  Fractional frequency reuse is one of the key interference mitigation schemes of the IEEE 802.16m draft standard. This paper proposes a resource allocation strategy for the uplink fractional frequency reuse in the variant soft frequency reuse. Soft frequency reuse means that the resources of every sector are separated into a home partition and two side partitions. While resources of the home partition may be allocated to all users, resources of the side partitions are available for cell center users only. The main contribution of this paper is to use the most robust and power-efficient modulation and coding schemes on the side partitions as long as resources are available. A simulation study shows that with non-saturated users the system capacity can be increased when preferring power-efficient modulation and coding schemes on the side partitions.

  @inproceedings{info3-inproceedings-2010-394, abstract = {Fractional frequency reuse is one of the key interference mitigation schemes of the IEEE 802.16m draft standard. This paper proposes a resource allocation strategy for the uplink fractional frequency reuse in the variant soft frequency reuse. Soft frequency reuse means that the resources of every sector are separated into a home partition and two side partitions. While resources of the home partition may be allocated to all users, resources of the side partitions are available for cell center users only. The main contribution of this paper is to use the most robust and power-efficient modulation and coding schemes on the side partitions as long as resources are available. A simulation study shows that with non-saturated users the system capacity can be increased when preferring power-efficient modulation and coding schemes on the side partitions.}, address = {Bodrum, Turkey}, author = {Wamser, Florian and Mittelstädt, David and Staehle, Dirk and Tran-Gia, Phuoc}, booktitle = {ACM MSWIM 2010}, keywords = {sys:hidden:inproceedings}, month = 10, pages = {132-139}, title = {Advanced Interference Mitigation with Frequency Reuse Schemes in the IEEE 802.16m Uplink}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-394 %A Wamser, Florian %A Mittelstädt, David %A Staehle, Dirk %A Tran-Gia, Phuoc %B ACM MSWIM 2010 %C Bodrum, Turkey %D 2010 %P 132-139 %T Advanced Interference Mitigation with Frequency Reuse Schemes in the IEEE 802.16m Uplink %X Fractional frequency reuse is one of the key interference mitigation schemes of the IEEE 802.16m draft standard. This paper proposes a resource allocation strategy for the uplink fractional frequency reuse in the variant soft frequency reuse. Soft frequency reuse means that the resources of every sector are separated into a home partition and two side partitions. While resources of the home partition may be allocated to all users, resources of the side partitions are available for cell center users only. The main contribution of this paper is to use the most robust and power-efficient modulation and coding schemes on the side partitions as long as resources are available. A simulation study shows that with non-saturated users the system capacity can be increased when preferring power-efficient modulation and coding schemes on the side partitions.
• Genetic Algorithms for WMN Planning. Pries, Rastin; Wendel, Viktor; Staehle, Barbara; Staehle, Dirk. In 13-th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2010). Bodrum, Turkey, 2010.
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  The complex multi-hop structure of WMNs requires a careful network planning. In this paper, we investigate the usability of Genetic Algorithms (GAs) for such a planning approach. The simplicity of GAs allow us to examine a large number of network configurations in order to optimize the network throughput and to fairly distribute the resources. This is achieved with a max-min fair share throughput distribution and by evaluating node positions, routing configurations, and channel assignments. We adapt standard genetic operators and evaluate the influence of the operators on the performance. The results show that GAs are well-suited for planning WMNs.

  @inproceedings{info3-inproceedings-2010-391, abstract = {The complex multi-hop structure of WMNs requires a careful network planning. In this paper, we investigate the usability of Genetic Algorithms (GAs) for such a planning approach. The simplicity of GAs allow us to examine a large number of network configurations in order to optimize the network throughput and to fairly distribute the resources. This is achieved with a max-min fair share throughput distribution and by evaluating node positions, routing configurations, and channel assignments. We adapt standard genetic operators and evaluate the influence of the operators on the performance. The results show that GAs are well-suited for planning WMNs.}, address = {Bodrum, Turkey}, author = {Pries, Rastin and Wendel, Viktor and Staehle, Barbara and Staehle, Dirk}, booktitle = {13-th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2010)}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Genetic Algorithms for WMN Planning}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-391 %A Pries, Rastin %A Wendel, Viktor %A Staehle, Barbara %A Staehle, Dirk %B 13-th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2010) %C Bodrum, Turkey %D 2010 %T Genetic Algorithms for WMN Planning %X The complex multi-hop structure of WMNs requires a careful network planning. In this paper, we investigate the usability of Genetic Algorithms (GAs) for such a planning approach. The simplicity of GAs allow us to examine a large number of network configurations in order to optimize the network throughput and to fairly distribute the resources. This is achieved with a max-min fair share throughput distribution and by evaluating node positions, routing configurations, and channel assignments. We adapt standard genetic operators and evaluate the influence of the operators on the performance. The results show that GAs are well-suited for planning WMNs.
• Tuontu: A Tool for Evaluating the Impact of Wireless Sensor Network Design Alternatives. Staehle, Barbara; Leimbach, Markus; Staehle, Dirk. In 9. GI/ITG KuVS Fachgespräch Sensornetze. Würzburg, Germany, 2010.
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  With an increasing wireless sensor network (WSN) application complexity, more alternatives for the WSN design arose. This complexity is also the reason why it is difficult to asses how and at which price in terms of money or decreased quality of service, design alternatives increase the system performance. In this work we therefore introduce a concept for quickly answering likewise questions, namely the task-based resource consumption modeling. It is the heart of the framework Tuontu which allows to easily estimate if an application is feasible in a given WSN deployment and which performance is to expect.

  @inproceedings{info3-inproceedings-2010-397, abstract = {With an increasing wireless sensor network (WSN) application complexity, more alternatives for the WSN design arose. This complexity is also the reason why it is difficult to asses how and at which price in terms of money or decreased quality of service, design alternatives increase the system performance. In this work we therefore introduce a concept for quickly answering likewise questions, namely the task-based resource consumption modeling. It is the heart of the framework Tuontu which allows to easily estimate if an application is feasible in a given WSN deployment and which performance is to expect.}, address = {Würzburg, Germany}, author = {Staehle, Barbara and Leimbach, Markus and Staehle, Dirk}, booktitle = {9. GI/ITG KuVS Fachgespräch Sensornetze}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Tuontu: A Tool for Evaluating the Impact of Wireless Sensor Network Design Alternatives}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-397 %A Staehle, Barbara %A Leimbach, Markus %A Staehle, Dirk %B 9. GI/ITG KuVS Fachgespräch Sensornetze %C Würzburg, Germany %D 2010 %T Tuontu: A Tool for Evaluating the Impact of Wireless Sensor Network Design Alternatives %X With an increasing wireless sensor network (WSN) application complexity, more alternatives for the WSN design arose. This complexity is also the reason why it is difficult to asses how and at which price in terms of money or decreased quality of service, design alternatives increase the system performance. In this work we therefore introduce a concept for quickly answering likewise questions, namely the task-based resource consumption modeling. It is the heart of the framework Tuontu which allows to easily estimate if an application is feasible in a given WSN deployment and which performance is to expect.
• On the Potential of IEEE 802.11s Intra-Mesh Congestion Control. Fu, Desheng; Staehle, Barbara; Pries, Rastin; Staehle, Dirk. In 13-th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2010). Bodrum, Turkey, 2010.
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  IEEE 802.11s is an emerging IEEE 802.11 amendment, aiming at standardizing wireless mesh networking. As congestion is a major problem in wireless mesh networks, IEEE 802.11s addresses this problem by introducing the intra-mesh congestion control. In order to explore the potential of this mechanism, we describe two different IEEE 802.11s compliant congestion control mechanisms and discuss their respective benefits and limitations. Results from a simulative evaluation demonstrate that intra-mesh congestion control is suitable for avoiding the loss of packets which have already been forwarded over the air interface and, if appropriately implemented, increases the overall network throughput. The results do however also point out the limitations of the proposed IEEE 802.11s congestion notification format.

  @inproceedings{info3-inproceedings-2010-390, abstract = {IEEE 802.11s is an emerging IEEE 802.11 amendment, aiming at standardizing wireless mesh networking. As congestion is a major problem in wireless mesh networks, IEEE 802.11s addresses this problem by introducing the intra-mesh congestion control. In order to explore the potential of this mechanism, we describe two different IEEE 802.11s compliant congestion control mechanisms and discuss their respective benefits and limitations. Results from a simulative evaluation demonstrate that intra-mesh congestion control is suitable for avoiding the loss of packets which have already been forwarded over the air interface and, if appropriately implemented, increases the overall network throughput. The results do however also point out the limitations of the proposed IEEE 802.11s congestion notification format.}, address = {Bodrum, Turkey}, author = {Fu, Desheng and Staehle, Barbara and Pries, Rastin and Staehle, Dirk}, booktitle = {13-th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2010)}, keywords = {sys:hidden:inproceedings}, month = 10, title = {On the Potential of IEEE 802.11s Intra-Mesh Congestion Control}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-390 %A Fu, Desheng %A Staehle, Barbara %A Pries, Rastin %A Staehle, Dirk %B 13-th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM 2010) %C Bodrum, Turkey %D 2010 %T On the Potential of IEEE 802.11s Intra-Mesh Congestion Control %X IEEE 802.11s is an emerging IEEE 802.11 amendment, aiming at standardizing wireless mesh networking. As congestion is a major problem in wireless mesh networks, IEEE 802.11s addresses this problem by introducing the intra-mesh congestion control. In order to explore the potential of this mechanism, we describe two different IEEE 802.11s compliant congestion control mechanisms and discuss their respective benefits and limitations. Results from a simulative evaluation demonstrate that intra-mesh congestion control is suitable for avoiding the loss of packets which have already been forwarded over the air interface and, if appropriately implemented, increases the overall network throughput. The results do however also point out the limitations of the proposed IEEE 802.11s congestion notification format.
• Impact of Electrical and Mechanical Antenna Downtilt on a WiMAX System with Fractional Frequency Reuse. Wamser, Florian; Mittelstädt, David; Staehle, Dirk; Tran-Gia, Phuoc. In FREQUENZ - Journal of RF-Engineering and Telecommunications, September/October. 2010.
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  In an interference-limited mobile WiMAX network, efficient cell planning and tuning is an essential task to ensure a functioning network. This includes the selection of the optimal settings for the antenna to, on the one hand provide a good coverage and on the other hand achieve cell isolation. Two different antenna tilting methods are examined in this article, namely the mechanical and the electrical vertical downtilt. The evaluation is done with an advanced WiMAX IEEE 802.16e simulator. In particular, the impact of the antenna configuration on WiMAX fractional frequency reuse (FFR) is studied. The results show a high dependency of FFR to the downtilt configuration, since the inter-cell interference level changes significantly with different settings.

  @article{info3-article-2010-80, abstract = {In an interference-limited mobile WiMAX network, efficient cell planning and tuning is an essential task to ensure a functioning network. This includes the selection of the optimal settings for the antenna to, on the one hand provide a good coverage and on the other hand achieve cell isolation. Two different antenna tilting methods are examined in this article, namely the mechanical and the electrical vertical downtilt. The evaluation is done with an advanced WiMAX IEEE 802.16e simulator. In particular, the impact of the antenna configuration on WiMAX fractional frequency reuse (FFR) is studied. The results show a high dependency of FFR to the downtilt configuration, since the inter-cell interference level changes significantly with different settings.}, author = {Wamser, Florian and Mittelstädt, David and Staehle, Dirk and Tran-Gia, Phuoc}, journal = {FREQUENZ - Journal of RF-Engineering and Telecommunications}, keywords = {sys:hidden:article}, month = {09}, title = {Impact of Electrical and Mechanical Antenna Downtilt on a WiMAX System with Fractional Frequency Reuse}, volume = {September/October}, year = 2010 }

  %0 Journal Article %1 info3-article-2010-80 %A Wamser, Florian %A Mittelstädt, David %A Staehle, Dirk %A Tran-Gia, Phuoc %D 2010 %J FREQUENZ - Journal of RF-Engineering and Telecommunications %T Impact of Electrical and Mechanical Antenna Downtilt on a WiMAX System with Fractional Frequency Reuse %V September/October %X In an interference-limited mobile WiMAX network, efficient cell planning and tuning is an essential task to ensure a functioning network. This includes the selection of the optimal settings for the antenna to, on the one hand provide a good coverage and on the other hand achieve cell isolation. Two different antenna tilting methods are examined in this article, namely the mechanical and the electrical vertical downtilt. The evaluation is done with an advanced WiMAX IEEE 802.16e simulator. In particular, the impact of the antenna configuration on WiMAX fractional frequency reuse (FFR) is studied. The results show a high dependency of FFR to the downtilt configuration, since the inter-cell interference level changes significantly with different settings.
• YouTube QoE-Aware Gateway Selection in Future Wireless Networks. Wamser, Florian; Staehle, Barbara; Pries, Rastin; Stezenbach, David; Deschner, Sebastian; Staehle, Dirk. In EuroView2010. Würzburg, Germany, 2010.
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  @inproceedings{info3-inproceedings-2010-406, address = {Würzburg, Germany}, author = {Wamser, Florian and Staehle, Barbara and Pries, Rastin and Stezenbach, David and Deschner, Sebastian and Staehle, Dirk}, booktitle = {EuroView2010}, keywords = {demobenefit}, month = {08}, title = {YouTube QoE-Aware Gateway Selection in Future Wireless Networks}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-406 %A Wamser, Florian %A Staehle, Barbara %A Pries, Rastin %A Stezenbach, David %A Deschner, Sebastian %A Staehle, Dirk %B EuroView2010 %C Würzburg, Germany %D 2010 %T YouTube QoE-Aware Gateway Selection in Future Wireless Networks
• YouTube QoE-Aware Gateway Selection in Future Wireless Networks. Wamser, Florian; Staehle, Barbara; Pries, Rastin; Stezenbach, David; Deschner, Sebastian; Staehle, Dirk. Würzburg, Germany, 2010, August.
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  @misc{info3-software-2010-8, address = {Würzburg, Germany}, author = {Wamser, Florian and Staehle, Barbara and Pries, Rastin and Stezenbach, David and Deschner, Sebastian and Staehle, Dirk}, booktitle = {EuroView2010}, keywords = {sys:hidden:software}, month = {08}, title = {YouTube QoE-Aware Gateway Selection in Future Wireless Networks}, year = 2010 }

  %0 Generic %1 info3-software-2010-8 %A Wamser, Florian %A Staehle, Barbara %A Pries, Rastin %A Stezenbach, David %A Deschner, Sebastian %A Staehle, Dirk %B EuroView2010 %C Würzburg, Germany %D 2010 %T YouTube QoE-Aware Gateway Selection in Future Wireless Networks
• Application- and Context-Aware Radio Resource Management for Future Wireless Networks. Staehle, Barbara; Wamser, Florian; Pries, Rastin; Staehle, Dirk; Mannweiler, Christian; Klein, Andreas; Schneider, Jörg; Schotten, Hans D. In EuroView2010, pp. 143–144. Würzburg, Germany, 2010.
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  @inproceedings{info3-inproceedings-2010-393, address = {Würzburg, Germany}, author = {Staehle, Barbara and Wamser, Florian and Pries, Rastin and Staehle, Dirk and Mannweiler, Christian and Klein, Andreas and Schneider, Jörg and Schotten, Hans D.}, booktitle = {EuroView2010}, keywords = {sys:hidden:inproceedings}, month = {08}, pages = {143-144}, title = {Application- and Context-Aware Radio Resource Management for Future Wireless Networks}, year = 2010 }

  %0 Conference Paper %1 info3-inproceedings-2010-393 %A Staehle, Barbara %A Wamser, Florian %A Pries, Rastin %A Staehle, Dirk %A Mannweiler, Christian %A Klein, Andreas %A Schneider, Jörg %A Schotten, Hans D. %B EuroView2010 %C Würzburg, Germany %D 2010 %P 143-144 %T Application- and Context-Aware Radio Resource Management for Future Wireless Networks
• On Optimization of Wireless Mesh Networks using Genetic Algorithms. Pries, Rastin; Staehle, Dirk; Staehle, Barbara; Tran-Gia, Phuoc. In International Journal On Advances in Internet Technology, 1&2. 2010.
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  @article{info3-article-2010-79, author = {Pries, Rastin and Staehle, Dirk and Staehle, Barbara and Tran-Gia, Phuoc}, journal = {International Journal On Advances in Internet Technology}, keywords = {sys:hidden:article}, month = {07}, title = {On Optimization of Wireless Mesh Networks using Genetic Algorithms}, volume = {1&2}, year = 2010 }

  %0 Journal Article %1 info3-article-2010-79 %A Pries, Rastin %A Staehle, Dirk %A Staehle, Barbara %A Tran-Gia, Phuoc %D 2010 %J International Journal On Advances in Internet Technology %T On Optimization of Wireless Mesh Networks using Genetic Algorithms %V 1&2

• An Economic Traffic Management Approach to Enable the TripleWin for Users, ISPs, and Overlay Providers. Hoßfeld, Tobias; Hausheer, David; Hecht, Fabio; Lehrieder, Frank; Oechsner, Simon; Papafili, Ioanna; Racz, Peter; Soursos, Sergios; Staehle, Dirk; Stamoulis, George D.; Tran-Gia, Phuoc; Stiller, Burkhard. In FIA Prague Book, ISBN 978-1-60750-007-0, G. Tselentis, J. Domingue, A. Galis, A. Gavras, D. Hausheer, S. Krco, V. Lotz, T. Zahariadis (eds.). IOS Press Books Online, 2009.
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  Socio-economic aspects play an increasingly important role in the Future Internet. To enable a TripleWin situation for the involved players, i.e. the end users, the ISPs and telecommunication operators, and the service providers, a new, incentive-based concept is proposed referred to as Economic Traffic Management (ETM). It aims at reducing costs within the network while improving the Quality-of-Experience (QoE) for end users. In particular, peer-to-peer (P2P) overlay applications generate a large amount of costs due to inter-domain traffic. ETM solution approaches have to take into account (a) the traffic patterns stemming from the overlay application, (b) the charging models for transit traffic, and (c) the applicability and efficiency of the proposed solution. The complex interaction between these three components and its consequences is demonstrated on selected examples. As a result it is shown that different ETM approaches have to be combined for an overall solution. To this end, the paper derives functional and non-functional requirements for designing ETM and provides a suitable architecture enabling the implementation of a TripleWin solution.

  @incollection{info3-incollection-2009-12, abstract = {Socio-economic aspects play an increasingly important role in the Future Internet. To enable a TripleWin situation for the involved players, i.e. the end users, the ISPs and telecommunication operators, and the service providers, a new, incentive-based concept is proposed referred to as Economic Traffic Management (ETM). It aims at reducing costs within the network while improving the Quality-of-Experience (QoE) for end users. In particular, peer-to-peer (P2P) overlay applications generate a large amount of costs due to inter-domain traffic. ETM solution approaches have to take into account (a) the traffic patterns stemming from the overlay application, (b) the charging models for transit traffic, and (c) the applicability and efficiency of the proposed solution. The complex interaction between these three components and its consequences is demonstrated on selected examples. As a result it is shown that different ETM approaches have to be combined for an overall solution. To this end, the paper derives functional and non-functional requirements for designing ETM and provides a suitable architecture enabling the implementation of a TripleWin solution.}, author = {Hoßfeld, Tobias and Hausheer, David and Hecht, Fabio and Lehrieder, Frank and Oechsner, Simon and Papafili, Ioanna and Racz, Peter and Soursos, Sergios and Staehle, Dirk and Stamoulis, George D. and Tran-Gia, Phuoc and Stiller, Burkhard}, booktitle = {FIA Prague Book, ISBN 978-1-60750-007-0}, editor = {Tselentis, Georgios and Domingue, John and Galis, Alex and Gavras, Anastasius and Hausheer, David and Krco, Srdjan and Lotz, Volkmar and Zahariadis, Theodore}, keywords = {myown}, month = {05}, publisher = {IOS Press Books Online}, title = {An Economic Traffic Management Approach to Enable the TripleWin for Users, ISPs, and Overlay Providers}, year = 2009 }

  %0 Book Section %1 info3-incollection-2009-12 %A Hoßfeld, Tobias %A Hausheer, David %A Hecht, Fabio %A Lehrieder, Frank %A Oechsner, Simon %A Papafili, Ioanna %A Racz, Peter %A Soursos, Sergios %A Staehle, Dirk %A Stamoulis, George D. %A Tran-Gia, Phuoc %A Stiller, Burkhard %B FIA Prague Book, ISBN 978-1-60750-007-0 %D 2009 %E Tselentis, Georgios %E Domingue, John %E Galis, Alex %E Gavras, Anastasius %E Hausheer, David %E Krco, Srdjan %E Lotz, Volkmar %E Zahariadis, Theodore %I IOS Press Books Online %T An Economic Traffic Management Approach to Enable the TripleWin for Users, ISPs, and Overlay Providers %X Socio-economic aspects play an increasingly important role in the Future Internet. To enable a TripleWin situation for the involved players, i.e. the end users, the ISPs and telecommunication operators, and the service providers, a new, incentive-based concept is proposed referred to as Economic Traffic Management (ETM). It aims at reducing costs within the network while improving the Quality-of-Experience (QoE) for end users. In particular, peer-to-peer (P2P) overlay applications generate a large amount of costs due to inter-domain traffic. ETM solution approaches have to take into account (a) the traffic patterns stemming from the overlay application, (b) the charging models for transit traffic, and (c) the applicability and efficiency of the proposed solution. The complex interaction between these three components and its consequences is demonstrated on selected examples. As a result it is shown that different ETM approaches have to be combined for an overall solution. To this end, the paper derives functional and non-functional requirements for designing ETM and provides a suitable architecture enabling the implementation of a TripleWin solution.
• Spatial and Temporal Fairness in Heterogeneous HSDPA-enabled UMTS Networks. Mäder, Andreas; Staehle, Dirk. In Eurasip Journal on Wireless Communications and Networking (JWCN), to appear 2009. 2009.
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  @article{info3-article-2009-60, author = {Mäder, Andreas and Staehle, Dirk}, journal = {Eurasip Journal on Wireless Communications and Networking (JWCN)}, keywords = {sys:hidden:article}, title = {Spatial and Temporal Fairness in Heterogeneous HSDPA-enabled UMTS Networks}, volume = {to appear 2009}, year = 2009 }

  %0 Journal Article %1 info3-article-2009-60 %A Mäder, Andreas %A Staehle, Dirk %D 2009 %J Eurasip Journal on Wireless Communications and Networking (JWCN) %T Spatial and Temporal Fairness in Heterogeneous HSDPA-enabled UMTS Networks %V to appear 2009
• Max-Min Fair Throughput in Multi-Gateway Multi-Rate Mesh Networks. Technical Report (454), . Staehle, Dirk; Staehle, Barbara; Pries, Rastin. University of Wuerzburg, 2009.
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  @techreport{info3-techreport-2009-243, author = {Staehle, Dirk and Staehle, Barbara and Pries, Rastin}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {01}, number = 454, title = {Max-Min Fair Throughput in Multi-Gateway Multi-Rate Mesh Networks}, year = 2009 }

  %0 Report %1 info3-techreport-2009-243 %A Staehle, Dirk %A Staehle, Barbara %A Pries, Rastin %D 2009 %N 454 %T Max-Min Fair Throughput in Multi-Gateway Multi-Rate Mesh Networks
• Speech Quality Aware Resource Control for Fixed and Mobile WiMAX. Michael Bohnert, Thomas; Staehle, Dirk; Monteiro, Edmundo. In WiMAX Evolution, F. F. Marcos Katz (ed.). John Wiley & Sons, 2009.
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  @incollection{info3-incollection-2009-13, author = {Michael Bohnert, Thomas and Staehle, Dirk and Monteiro, Edmundo}, booktitle = {WiMAX Evolution}, editor = {Marcos Katz, Frank Fitzek}, keywords = {myown}, month = {01}, publisher = {John Wiley & Sons}, title = {Speech Quality Aware Resource Control for Fixed and Mobile WiMAX}, year = 2009 }

  %0 Book Section %1 info3-incollection-2009-13 %A Michael Bohnert, Thomas %A Staehle, Dirk %A Monteiro, Edmundo %B WiMAX Evolution %D 2009 %E Marcos Katz, Frank Fitzek %I John Wiley & Sons %T Speech Quality Aware Resource Control for Fixed and Mobile WiMAX
• Capacity Analysis of Reservation-Based Random Access for Braodband Wireless Access Networks. Vinel, Alexey; Ni, Qiang; Staehle, Dirk; Turlikov, Andrey. In IEEE Journal on Selected Areas in Communication (JSAC), 27. 2009.
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  @article{info3-article-2009-61, author = {Vinel, Alexey and Ni, Qiang and Staehle, Dirk and Turlikov, Andrey}, journal = {IEEE Journal on Selected Areas in Communication (JSAC)}, keywords = {sys:hidden:article}, month = {02}, title = {Capacity Analysis of Reservation-Based Random Access for Braodband Wireless Access Networks}, volume = 27, year = 2009 }

  %0 Journal Article %1 info3-article-2009-61 %A Vinel, Alexey %A Ni, Qiang %A Staehle, Dirk %A Turlikov, Andrey %D 2009 %J IEEE Journal on Selected Areas in Communication (JSAC) %T Capacity Analysis of Reservation-Based Random Access for Braodband Wireless Access Networks %V 27
• An Analytical Model for the Evaluation of the Information Processing in Multi-Probe Networks. Technical Report (456), . Zinner, Thomas; Staehle, Dirk; Oechsner, Simon; Tran-Gia, Phuoc; Tutschku, Kurt. University of Wuerzburg, 2009.
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  @techreport{info3-techreport-2009-244, author = {Zinner, Thomas and Staehle, Dirk and Oechsner, Simon and Tran-Gia, Phuoc and Tutschku, Kurt}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {03}, number = 456, title = {An Analytical Model for the Evaluation of the Information Processing in Multi-Probe Networks}, year = 2009 }

  %0 Report %1 info3-techreport-2009-244 %A Zinner, Thomas %A Staehle, Dirk %A Oechsner, Simon %A Tran-Gia, Phuoc %A Tutschku, Kurt %D 2009 %N 456 %T An Analytical Model for the Evaluation of the Information Processing in Multi-Probe Networks
• Traffic Measurement and Analysis of a Broadband Wireless Internet Access. Pries, Rastin; Wamser, Florian; Staehle, Dirk; Heck, Klaus; Tran-Gia, Phuoc. In IEEE VTC Spring 09. Barcelona, Spain, 2009.
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  The increasing broadband wireless Internet usage and the limited wireless resources require a careful network management and optimization of the wireless Internet Service Providers (ISPs). Unfortunately, those providers often just have statistics about the overall usage and limited knowledge about the detailed application distribution as well as the traffic characteristics. In this paper we present user and traffic characteristics measured at a broadband wireless Internet access. The results show that the applications change quickly but the general characteristics like packet size and TCP/UDP percentage have not changed during the last years.

  @inproceedings{info3-inproceedings-2009-336, abstract = {The increasing broadband wireless Internet usage and the limited wireless resources require a careful network management and optimization of the wireless Internet Service Providers (ISPs). Unfortunately, those providers often just have statistics about the overall usage and limited knowledge about the detailed application distribution as well as the traffic characteristics. In this paper we present user and traffic characteristics measured at a broadband wireless Internet access. The results show that the applications change quickly but the general characteristics like packet size and TCP/UDP percentage have not changed during the last years.}, address = {Barcelona, Spain}, author = {Pries, Rastin and Wamser, Florian and Staehle, Dirk and Heck, Klaus and Tran-Gia, Phuoc}, booktitle = {IEEE VTC Spring 09}, keywords = {sys:hidden:inproceedings}, month = {04}, title = {Traffic Measurement and Analysis of a Broadband Wireless Internet Access}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-336 %A Pries, Rastin %A Wamser, Florian %A Staehle, Dirk %A Heck, Klaus %A Tran-Gia, Phuoc %B IEEE VTC Spring 09 %C Barcelona, Spain %D 2009 %T Traffic Measurement and Analysis of a Broadband Wireless Internet Access %X The increasing broadband wireless Internet usage and the limited wireless resources require a careful network management and optimization of the wireless Internet Service Providers (ISPs). Unfortunately, those providers often just have statistics about the overall usage and limited knowledge about the detailed application distribution as well as the traffic characteristics. In this paper we present user and traffic characteristics measured at a broadband wireless Internet access. The results show that the applications change quickly but the general characteristics like packet size and TCP/UDP percentage have not changed during the last years.
• Impact of Best Effort Frame Bursting in IEEE 802.11 Networks. Pries, Rastin; Staehle, Dirk; Menth, Stefan; Menth, Michael; Tran-Gia, Phuoc. In IEEE VTC Spring 09. Barcelona, Spain, 2009.
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  Wireless LAN strongly prioritizes high priority traffic over low priority best effort traffic. This causes reduced access to the medium for low priority traffic and under some conditions even leads to starvation. To compensate the throughput reduction of low priority traffic, we propose frame bursting in this paper. That means low priority traffic is sent infrequently, but many frames may be sent in a burst. Our simulation results show that the throughput of the low priority best effort traffic class can be significantly increased without disrupting high priority traffic.

  @inproceedings{info3-inproceedings-2009-335, abstract = {Wireless LAN strongly prioritizes high priority traffic over low priority best effort traffic. This causes reduced access to the medium for low priority traffic and under some conditions even leads to starvation. To compensate the throughput reduction of low priority traffic, we propose frame bursting in this paper. That means low priority traffic is sent infrequently, but many frames may be sent in a burst. Our simulation results show that the throughput of the low priority best effort traffic class can be significantly increased without disrupting high priority traffic.}, address = {Barcelona, Spain}, author = {Pries, Rastin and Staehle, Dirk and Menth, Stefan and Menth, Michael and Tran-Gia, Phuoc}, booktitle = {IEEE VTC Spring 09}, keywords = {sys:hidden:inproceedings}, month = {04}, title = {Impact of Best Effort Frame Bursting in IEEE 802.11 Networks}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-335 %A Pries, Rastin %A Staehle, Dirk %A Menth, Stefan %A Menth, Michael %A Tran-Gia, Phuoc %B IEEE VTC Spring 09 %C Barcelona, Spain %D 2009 %T Impact of Best Effort Frame Bursting in IEEE 802.11 Networks %X Wireless LAN strongly prioritizes high priority traffic over low priority best effort traffic. This causes reduced access to the medium for low priority traffic and under some conditions even leads to starvation. To compensate the throughput reduction of low priority traffic, we propose frame bursting in this paper. That means low priority traffic is sent infrequently, but many frames may be sent in a burst. Our simulation results show that the throughput of the low priority best effort traffic class can be significantly increased without disrupting high priority traffic.
• Chapter VIII: Cooperation Strategies for P2P Content Distribution in Cellular Mobile Networks: Considering Mobility and Heterogeneity. Hoßfeld, Tobias; Duelli, Michael; Staehle, Dirk; Tran-Gia, Phuoc. In Mobile Peer-to-Peer Computing for Next Generation Distributed Environments: Advancing Conceptual and Algorithmic Applications, B.-C. Seet (ed.), pp. 1234–5678. Information Science Reference, ISBN: 978-1-60566-715-7, 2009.
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  The performance of P2P content distribution in cellular networks depends highly on the cooperation and coordination of heterogeneous and often selfish mobile users. The major challenges are the identification of problems specifically arising in cellular mobile networks and the development of new cooperation strategies to overcome these problems. In the coherent previous chapter, we focused on the selfishness of users in such heterogeneous environments. This discussion is now extended by emphasizing the impact of mobility and vertical handover between different wireless access technologies. An abstract mobility model is required to allow the performance evaluation in feasible computational time. As a result, the performance in today’s and future cellular networks is predicted and new approaches to master heterogeneity in cellular networks are derived.

  @incollection{info3-incollection-2009-10, abstract = {The performance of P2P content distribution in cellular networks depends highly on the cooperation and coordination of heterogeneous and often selfish mobile users. The major challenges are the identification of problems specifically arising in cellular mobile networks and the development of new cooperation strategies to overcome these problems. In the coherent previous chapter, we focused on the selfishness of users in such heterogeneous environments. This discussion is now extended by emphasizing the impact of mobility and vertical handover between different wireless access technologies. An abstract mobility model is required to allow the performance evaluation in feasible computational time. As a result, the performance in today’s and future cellular networks is predicted and new approaches to master heterogeneity in cellular networks are derived.}, author = {Hoßfeld, Tobias and Duelli, Michael and Staehle, Dirk and Tran-Gia, Phuoc}, booktitle = {Mobile Peer-to-Peer Computing for Next Generation Distributed Environments: Advancing Conceptual and Algorithmic Applications}, editor = {Seet, Boon-Chong}, keywords = {myown}, month = {05}, pages = {1234–5678}, publisher = {Information Science Reference, ISBN: 978-1-60566-715-7}, title = {Chapter VIII: Cooperation Strategies for P2P Content Distribution in Cellular Mobile Networks: Considering Mobility and Heterogeneity}, year = 2009 }

  %0 Book Section %1 info3-incollection-2009-10 %A Hoßfeld, Tobias %A Duelli, Michael %A Staehle, Dirk %A Tran-Gia, Phuoc %B Mobile Peer-to-Peer Computing for Next Generation Distributed Environments: Advancing Conceptual and Algorithmic Applications %D 2009 %E Seet, Boon-Chong %I Information Science Reference, ISBN: 978-1-60566-715-7 %P 1234--5678 %T Chapter VIII: Cooperation Strategies for P2P Content Distribution in Cellular Mobile Networks: Considering Mobility and Heterogeneity %X The performance of P2P content distribution in cellular networks depends highly on the cooperation and coordination of heterogeneous and often selfish mobile users. The major challenges are the identification of problems specifically arising in cellular mobile networks and the development of new cooperation strategies to overcome these problems. In the coherent previous chapter, we focused on the selfishness of users in such heterogeneous environments. This discussion is now extended by emphasizing the impact of mobility and vertical handover between different wireless access technologies. An abstract mobility model is required to allow the performance evaluation in feasible computational time. As a result, the performance in today’s and future cellular networks is predicted and new approaches to master heterogeneity in cellular networks are derived.
• Traffic and QoS Management in Wireless Multimedia Networks. Koucheryavy, Yevgeni; Giambene, Giovanni; Staehle, Dirk; Barcelo-Arroyo, Francisco; Braun, Torsten; Siris, Vasilios. In . Springer, New York, 2009.
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  @book{info3-book-2009-10, address = {New York}, author = {Koucheryavy, Yevgeni and Giambene, Giovanni and Staehle, Dirk and Barcelo-Arroyo, Francisco and Braun, Torsten and Siris, Vasilios}, booktitle = {COST 290 Final Report}, keywords = {sys:hidden:book}, month = {05}, publisher = {Springer}, title = {Traffic and QoS Management in Wireless Multimedia Networks}, year = 2009 }

  %0 Book %1 info3-book-2009-10 %A Koucheryavy, Yevgeni %A Giambene, Giovanni %A Staehle, Dirk %A Barcelo-Arroyo, Francisco %A Braun, Torsten %A Siris, Vasilios %B COST 290 Final Report %C New York %D 2009 %I Springer %T Traffic and QoS Management in Wireless Multimedia Networks
• On Traffic Characteristics of a Broadband Wireless Internet Access. Pries, Rastin; Wamser, Florian; Staehle, Dirk; Heck, Klaus; Tran-Gia, Phuoc. In Next Generation Internet Networks 2009 (NGI 2009). Aveiro, Portugal, 2009.
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  Internet traffic measurements and traffic characterization are essential for managing and optimizing network infrastructures. The increasing number of wireless Internet users and the changing application demands require consecutive traffic measurements. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect the current traffic characteristics. In this paper, we present the results of these measurements like application distributions as well as changing traffic characteristics caused by user demands and new services. The results are used by a network service provider to optimize its network performance in order to give Quality of Service (QoS) guarantees for home users in its fixed wireless network.

  @inproceedings{info3-inproceedings-2009-350, abstract = {Internet traffic measurements and traffic characterization are essential for managing and optimizing network infrastructures. The increasing number of wireless Internet users and the changing application demands require consecutive traffic measurements. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect the current traffic characteristics. In this paper, we present the results of these measurements like application distributions as well as changing traffic characteristics caused by user demands and new services. The results are used by a network service provider to optimize its network performance in order to give Quality of Service (QoS) guarantees for home users in its fixed wireless network.}, address = {Aveiro, Portugal}, author = {Pries, Rastin and Wamser, Florian and Staehle, Dirk and Heck, Klaus and Tran-Gia, Phuoc}, booktitle = {Next Generation Internet Networks 2009 (NGI 2009)}, keywords = {sys:hidden:inproceedings}, month = {07}, title = {On Traffic Characteristics of a Broadband Wireless Internet Access}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-350 %A Pries, Rastin %A Wamser, Florian %A Staehle, Dirk %A Heck, Klaus %A Tran-Gia, Phuoc %B Next Generation Internet Networks 2009 (NGI 2009) %C Aveiro, Portugal %D 2009 %T On Traffic Characteristics of a Broadband Wireless Internet Access %X Internet traffic measurements and traffic characterization are essential for managing and optimizing network infrastructures. The increasing number of wireless Internet users and the changing application demands require consecutive traffic measurements. Therefore, we have performed measurements of home users at a broadband wireless access service provider in order to reflect the current traffic characteristics. In this paper, we present the results of these measurements like application distributions as well as changing traffic characteristics caused by user demands and new services. The results are used by a network service provider to optimize its network performance in order to give Quality of Service (QoS) guarantees for home users in its fixed wireless network.
• Wireless Mesh Network Planning and Optimization through Genetic Algorithms. Pries, Rastin; Staehle, Dirk; Stoykova, Marieta; Staehle, Barbara; Tran-Gia, Phuoc. In The Second International Conference on Advances in Mesh Networks, MESH 2009, p. 7. Athens/Glyfada, Greece, 2009.
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  Wireless Mesh Networks (WMNs) are a promising technology for providing broadband wireless access to the end user. They offer a higher degree of flexibility compared to traditional networks but on the expense of a more complex structure. Thus, planning and optimization of WMNs is a challenge. In this paper, we address this challenge using genetic algorithms. Genetic algorithms are able to evaluate and optimize large-scale WMNs in relatively small computation time. The results prove the effectiveness of the genetic operators to optimize the routing and channel assignment in WMNs.

  @inproceedings{info3-inproceedings-2009-347, abstract = {Wireless Mesh Networks (WMNs) are a promising technology for providing broadband wireless access to the end user. They offer a higher degree of flexibility compared to traditional networks but on the expense of a more complex structure. Thus, planning and optimization of WMNs is a challenge. In this paper, we address this challenge using genetic algorithms. Genetic algorithms are able to evaluate and optimize large-scale WMNs in relatively small computation time. The results prove the effectiveness of the genetic operators to optimize the routing and channel assignment in WMNs.}, address = {Athens/Glyfada, Greece}, author = {Pries, Rastin and Staehle, Dirk and Stoykova, Marieta and Staehle, Barbara and Tran-Gia, Phuoc}, booktitle = {The Second International Conference on Advances in Mesh Networks, MESH 2009}, keywords = {sys:hidden:inproceedings}, month = {06}, pages = 7, title = {Wireless Mesh Network Planning and Optimization through Genetic Algorithms}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-347 %A Pries, Rastin %A Staehle, Dirk %A Stoykova, Marieta %A Staehle, Barbara %A Tran-Gia, Phuoc %B The Second International Conference on Advances in Mesh Networks, MESH 2009 %C Athens/Glyfada, Greece %D 2009 %P 7 %T Wireless Mesh Network Planning and Optimization through Genetic Algorithms %X Wireless Mesh Networks (WMNs) are a promising technology for providing broadband wireless access to the end user. They offer a higher degree of flexibility compared to traditional networks but on the expense of a more complex structure. Thus, planning and optimization of WMNs is a challenge. In this paper, we address this challenge using genetic algorithms. Genetic algorithms are able to evaluate and optimize large-scale WMNs in relatively small computation time. The results prove the effectiveness of the genetic operators to optimize the routing and channel assignment in WMNs.
• Radio Resource Management for the UMTS Enhanced Uplink in Presence of QoS Radio Bearers. Mäder, Andreas; Staehle, Dirk. In Special Issue of Annals of Operation Research on Stochastic Performance Models for Resource Allocati, 170. 2009.
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  @article{info3-article-2009-43, author = {Mäder, Andreas and Staehle, Dirk}, journal = {Special Issue of Annals of Operation Research on Stochastic Performance Models for Resource Allocati}, keywords = {sys:hidden:article}, month = {09}, title = {Radio Resource Management for the UMTS Enhanced Uplink in Presence of QoS Radio Bearers}, volume = 170, year = 2009 }

  %0 Journal Article %1 info3-article-2009-43 %A Mäder, Andreas %A Staehle, Dirk %D 2009 %J Special Issue of Annals of Operation Research on Stochastic Performance Models for Resource Allocati %T Radio Resource Management for the UMTS Enhanced Uplink in Presence of QoS Radio Bearers %V 170
• Measuring One-Way Delay in Wireless Mesh Networks - An Experimental Investigation. Staehle, Barbara; Staehle, Dirk; Pries, Rastin; Hirth, Matthias; Kassler, Andreas; Dely, Peter. In 4-th ACM Workshop on Performance Monitoring and Measurement of Heterogeneous Wireless and Wired Networks (PM2HW2N 2009). Tenerife, Canary Islands, Spain, 2009.
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  Wireless Mesh networks are multi-hop networks mostly based on IEEE 802.11 technology and are considered as a viable alternative for providing broadband wireless Internet access. As a consequence, they require support for Quality of Service or advanced mechanisms for selecting Internet gateways. One important required information is the one-way delay between different nodes. In this paper, we have developed, implemented, and evaluated an one-way delay estimation technique for wireless mesh networks which is based on estimating intra node queuing and inter node forwarding delay. An IP-header option field is used to accumulate the per hop delay estimate to provide an end-to-end estimate. We also outline problems with the implementation and compare results with real one-way delays obtained from a 14 node mesh testbed. We show how estimation accuracy depends on network load and provide insights into further improvements.

  @inproceedings{info3-inproceedings-2009-359, abstract = {Wireless Mesh networks are multi-hop networks mostly based on IEEE 802.11 technology and are considered as a viable alternative for providing broadband wireless Internet access. As a consequence, they require support for Quality of Service or advanced mechanisms for selecting Internet gateways. One important required information is the one-way delay between different nodes. In this paper, we have developed, implemented, and evaluated an one-way delay estimation technique for wireless mesh networks which is based on estimating intra node queuing and inter node forwarding delay. An IP-header option field is used to accumulate the per hop delay estimate to provide an end-to-end estimate. We also outline problems with the implementation and compare results with real one-way delays obtained from a 14 node mesh testbed. We show how estimation accuracy depends on network load and provide insights into further improvements.}, address = {Tenerife, Canary Islands, Spain}, author = {Staehle, Barbara and Staehle, Dirk and Pries, Rastin and Hirth, Matthias and Kassler, Andreas and Dely, Peter}, booktitle = {4-th ACM Workshop on Performance Monitoring and Measurement of Heterogeneous Wireless and Wired Networks (PM2HW2N 2009)}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Measuring One-Way Delay in Wireless Mesh Networks - An Experimental Investigation}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-359 %A Staehle, Barbara %A Staehle, Dirk %A Pries, Rastin %A Hirth, Matthias %A Kassler, Andreas %A Dely, Peter %B 4-th ACM Workshop on Performance Monitoring and Measurement of Heterogeneous Wireless and Wired Networks (PM2HW2N 2009) %C Tenerife, Canary Islands, Spain %D 2009 %T Measuring One-Way Delay in Wireless Mesh Networks - An Experimental Investigation %X Wireless Mesh networks are multi-hop networks mostly based on IEEE 802.11 technology and are considered as a viable alternative for providing broadband wireless Internet access. As a consequence, they require support for Quality of Service or advanced mechanisms for selecting Internet gateways. One important required information is the one-way delay between different nodes. In this paper, we have developed, implemented, and evaluated an one-way delay estimation technique for wireless mesh networks which is based on estimating intra node queuing and inter node forwarding delay. An IP-header option field is used to accumulate the per hop delay estimate to provide an end-to-end estimate. We also outline problems with the implementation and compare results with real one-way delays obtained from a 14 node mesh testbed. We show how estimation accuracy depends on network load and provide insights into further improvements.
• Performance Evaluation and Parameterization of the IEEE 802.16 Contention-Based CDMA Bandwidth Request Mechanism for the OFDMA Physical Layer. Staehle, Dirk; Pries, Rastin; Vinel, Alexey; Mäder, Andreas. In Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems. Tenerife, Canary Islands, Spain, 2009.
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  The IEEE 802.16 standard specifies two contention-based mechanisms for the OFDMA physical layer to transmit bandwidth requests from subscriber station to base station: the standard mechanism is based on Slotted Aloha with a truncated binary exponential backoff; the alternative one is based on CDMA. This paper describes the CDMA-based contention mechanism and presents an analytic model to compute its performance in terms of delay and consumed resources. The tunable parameters for the CDMA-based random access procedure are the number of ranging subchannels, the number of codes per ranging subchannels, and the detection threshold. An optimal configuration is derived for a given load in terms of the request arrival rate.

  @inproceedings{info3-inproceedings-2009-373, abstract = {The IEEE 802.16 standard specifies two contention-based mechanisms for the OFDMA physical layer to transmit bandwidth requests from subscriber station to base station: the standard mechanism is based on Slotted Aloha with a truncated binary exponential backoff; the alternative one is based on CDMA. This paper describes the CDMA-based contention mechanism and presents an analytic model to compute its performance in terms of delay and consumed resources. The tunable parameters for the CDMA-based random access procedure are the number of ranging subchannels, the number of codes per ranging subchannels, and the detection threshold. An optimal configuration is derived for a given load in terms of the request arrival rate.}, address = {Tenerife, Canary Islands, Spain}, author = {Staehle, Dirk and Pries, Rastin and Vinel, Alexey and Mäder, Andreas}, booktitle = {Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Performance Evaluation and Parameterization of the IEEE 802.16 Contention-Based CDMA Bandwidth Request Mechanism for the OFDMA Physical Layer}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-373 %A Staehle, Dirk %A Pries, Rastin %A Vinel, Alexey %A Mäder, Andreas %B Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems %C Tenerife, Canary Islands, Spain %D 2009 %T Performance Evaluation and Parameterization of the IEEE 802.16 Contention-Based CDMA Bandwidth Request Mechanism for the OFDMA Physical Layer %X The IEEE 802.16 standard specifies two contention-based mechanisms for the OFDMA physical layer to transmit bandwidth requests from subscriber station to base station: the standard mechanism is based on Slotted Aloha with a truncated binary exponential backoff; the alternative one is based on CDMA. This paper describes the CDMA-based contention mechanism and presents an analytic model to compute its performance in terms of delay and consumed resources. The tunable parameters for the CDMA-based random access procedure are the number of ranging subchannels, the number of codes per ranging subchannels, and the detection threshold. An optimal configuration is derived for a given load in terms of the request arrival rate.
• Pushing the Performance of Biased Neighbor Selection through Biased Unchoking. Oechsner, Simon; Lehrieder, Frank; Hoßfeld, Tobias; Metzger, Florian; Pussep, Konstantin; Staehle, Dirk. In 9th International Conference on Peer-to-Peer Computing. Seattle, USA, 2009.
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  Locality promotion in P2P content distribution networks is currently a major research topic. One of the goals of all discussed approaches is to reduce the interdomain traffic that causes high costs for ISPs. However, the focus of the work in this field is generally on the type of locality information that is provided to the overlay and on the entities that exchange this information. An aspect that is generally neglected is how this information is used by the peers. In this paper, we consider the predominant approach of Biased Neighbor Selection and compare it with Biased Unchoking, an alternative locality aware peer selection strategy we propose in this paper. We show that both mechanisms complement each other for the BitTorrent file sharing application and achieve the best performance when combined.

  @inproceedings{info3-inproceedings-2009-355, abstract = {Locality promotion in P2P content distribution networks is currently a major research topic. One of the goals of all discussed approaches is to reduce the interdomain traffic that causes high costs for ISPs. However, the focus of the work in this field is generally on the type of locality information that is provided to the overlay and on the entities that exchange this information. An aspect that is generally neglected is how this information is used by the peers. In this paper, we consider the predominant approach of Biased Neighbor Selection and compare it with Biased Unchoking, an alternative locality aware peer selection strategy we propose in this paper. We show that both mechanisms complement each other for the BitTorrent file sharing application and achieve the best performance when combined.}, address = {Seattle, USA}, author = {Oechsner, Simon and Lehrieder, Frank and Hoßfeld, Tobias and Metzger, Florian and Pussep, Konstantin and Staehle, Dirk}, booktitle = {9th International Conference on Peer-to-Peer Computing}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Pushing the Performance of Biased Neighbor Selection through Biased Unchoking}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-355 %A Oechsner, Simon %A Lehrieder, Frank %A Hoßfeld, Tobias %A Metzger, Florian %A Pussep, Konstantin %A Staehle, Dirk %B 9th International Conference on Peer-to-Peer Computing %C Seattle, USA %D 2009 %T Pushing the Performance of Biased Neighbor Selection through Biased Unchoking %X Locality promotion in P2P content distribution networks is currently a major research topic. One of the goals of all discussed approaches is to reduce the interdomain traffic that causes high costs for ISPs. However, the focus of the work in this field is generally on the type of locality information that is provided to the overlay and on the entities that exchange this information. An aspect that is generally neglected is how this information is used by the peers. In this paper, we consider the predominant approach of Biased Neighbor Selection and compare it with Biased Unchoking, an alternative locality aware peer selection strategy we propose in this paper. We show that both mechanisms complement each other for the BitTorrent file sharing application and achieve the best performance when combined.
• Effects of Link Rate Assignment on the Max-Min Fair Throughput of Wireless Mesh Networks. Staehle, Barbara; Staehle, Dirk; Pries, Rastin. In 21st International Teletraffic Congress (ITC 21). Paris, France, 2009.
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  Wireless mesh networks (WMNs) support a variety of modulation and coding schemes (MCSs) and hence enable adaptive modulation and coding. On the one hand, adaptive modulation and coding significantly increases the overall system capacity, as it allows to maximize the throughput on each link in dependence of the channel conditions. On the other hand, there is a trade-off between link data rate and spatial reuse, as high data rate links are less robust against interference. For maximizing the wireless mesh network performance, an intelligent link rate assignment strategy is thus required. By evaluating the maxmin fair WMN throughput under different link rate assignment strategies, we are able to show that using more robust MCSs improve the overall WMN throughput and point out directions towards an optimized MCS choice.

  @inproceedings{info3-inproceedings-2009-351, abstract = {Wireless mesh networks (WMNs) support a variety of modulation and coding schemes (MCSs) and hence enable adaptive modulation and coding. On the one hand, adaptive modulation and coding significantly increases the overall system capacity, as it allows to maximize the throughput on each link in dependence of the channel conditions. On the other hand, there is a trade-off between link data rate and spatial reuse, as high data rate links are less robust against interference. For maximizing the wireless mesh network performance, an intelligent link rate assignment strategy is thus required. By evaluating the maxmin fair WMN throughput under different link rate assignment strategies, we are able to show that using more robust MCSs improve the overall WMN throughput and point out directions towards an optimized MCS choice.}, address = {Paris, France}, author = {Staehle, Barbara and Staehle, Dirk and Pries, Rastin}, booktitle = {21st International Teletraffic Congress (ITC 21)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Effects of Link Rate Assignment on the Max-Min Fair Throughput of Wireless Mesh Networks}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-351 %A Staehle, Barbara %A Staehle, Dirk %A Pries, Rastin %B 21st International Teletraffic Congress (ITC 21) %C Paris, France %D 2009 %T Effects of Link Rate Assignment on the Max-Min Fair Throughput of Wireless Mesh Networks %X Wireless mesh networks (WMNs) support a variety of modulation and coding schemes (MCSs) and hence enable adaptive modulation and coding. On the one hand, adaptive modulation and coding significantly increases the overall system capacity, as it allows to maximize the throughput on each link in dependence of the channel conditions. On the other hand, there is a trade-off between link data rate and spatial reuse, as high data rate links are less robust against interference. For maximizing the wireless mesh network performance, an intelligent link rate assignment strategy is thus required. By evaluating the maxmin fair WMN throughput under different link rate assignment strategies, we are able to show that using more robust MCSs improve the overall WMN throughput and point out directions towards an optimized MCS choice.
• On the Unfair Channel Access Phenomenon in Wireless LANs. Pries, Rastin; Staehle, Dirk; Oechsner, Simon; Menth, Michael; Menth, Stefan; Tran-Gia, Phuoc. In 21st International Teletraffic Congress (ITC 21). Paris, France, 2009.
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  This paper shows that the relative collision probability for packets in Wireless LAN 802.11 networks decreases with increasing load offered by the respective station. This denotes a clearly unfair channel access which is important to be aware of, e.g., when collision probabilities are measured and used for reactive control of contention windows. We model the unfair channel access phenomenon analytically and semi-analytically for bidirectional constant bit rate and unidirectional TCP traffic and compare the results with those from simulations.

  @inproceedings{info3-inproceedings-2009-352, abstract = {This paper shows that the relative collision probability for packets in Wireless LAN 802.11 networks decreases with increasing load offered by the respective station. This denotes a clearly unfair channel access which is important to be aware of, e.g., when collision probabilities are measured and used for reactive control of contention windows. We model the unfair channel access phenomenon analytically and semi-analytically for bidirectional constant bit rate and unidirectional TCP traffic and compare the results with those from simulations.}, address = {Paris, France}, author = {Pries, Rastin and Staehle, Dirk and Oechsner, Simon and Menth, Michael and Menth, Stefan and Tran-Gia, Phuoc}, booktitle = {21st International Teletraffic Congress (ITC 21)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {On the Unfair Channel Access Phenomenon in Wireless LANs}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-352 %A Pries, Rastin %A Staehle, Dirk %A Oechsner, Simon %A Menth, Michael %A Menth, Stefan %A Tran-Gia, Phuoc %B 21st International Teletraffic Congress (ITC 21) %C Paris, France %D 2009 %T On the Unfair Channel Access Phenomenon in Wireless LANs %X This paper shows that the relative collision probability for packets in Wireless LAN 802.11 networks decreases with increasing load offered by the respective station. This denotes a clearly unfair channel access which is important to be aware of, e.g., when collision probabilities are measured and used for reactive control of contention windows. We model the unfair channel access phenomenon analytically and semi-analytically for bidirectional constant bit rate and unidirectional TCP traffic and compare the results with those from simulations.
• Pushing the Performance of Biased Neighbor Selection through Biased Unchoking. Technical Report (459), . Oechsner, Simon; Lehrieder, Frank; Hoßfeld, Tobias; Metzger, Florian; Pussep, Konstantin; Staehle, Dirk. University of Wuerzburg, 2009.
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  @techreport{info3-techreport-2009-245, author = {Oechsner, Simon and Lehrieder, Frank and Hoßfeld, Tobias and Metzger, Florian and Pussep, Konstantin and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {08}, number = 459, title = {Pushing the Performance of Biased Neighbor Selection through Biased Unchoking}, year = 2009 }

  %0 Report %1 info3-techreport-2009-245 %A Oechsner, Simon %A Lehrieder, Frank %A Hoßfeld, Tobias %A Metzger, Florian %A Pussep, Konstantin %A Staehle, Dirk %D 2009 %N 459 %T Pushing the Performance of Biased Neighbor Selection through Biased Unchoking
• Monitoring YouTube Performance in Wireless Mesh Networks. Wamser, Florian; Staehle, Barbara; Deschner, Sebastian; Hirth, Matthias; Staehle, Dirk; Pries, Rastin. Würzburg, Germany, 2009, July.
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  @misc{info3-software-2009-7, address = {Würzburg, Germany}, author = {Wamser, Florian and Staehle, Barbara and Deschner, Sebastian and Hirth, Matthias and Staehle, Dirk and Pries, Rastin}, booktitle = {EuroView2009}, keywords = {sys:hidden:software}, month = {07}, title = {Monitoring YouTube Performance in Wireless Mesh Networks}, year = 2009 }

  %0 Generic %1 info3-software-2009-7 %A Wamser, Florian %A Staehle, Barbara %A Deschner, Sebastian %A Hirth, Matthias %A Staehle, Dirk %A Pries, Rastin %B EuroView2009 %C Würzburg, Germany %D 2009 %T Monitoring YouTube Performance in Wireless Mesh Networks
• Monitoring YouTube Performance in Wireless Mesh Networks. Wamser, Florian; Staehle, Barbara; Deschner, Sebastian; Hirth, Matthias; Staehle, Dirk; Pries, Rastin. Würzburg, Germany, 2009, July.
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  @misc{info3-poster-2009-22, address = {Würzburg, Germany}, author = {Wamser, Florian and Staehle, Barbara and Deschner, Sebastian and Hirth, Matthias and Staehle, Dirk and Pries, Rastin}, booktitle = {EuroView2009}, keywords = {demobenefit}, month = {07}, title = {Monitoring YouTube Performance in Wireless Mesh Networks}, year = 2009 }

  %0 Generic %1 info3-poster-2009-22 %A Wamser, Florian %A Staehle, Barbara %A Deschner, Sebastian %A Hirth, Matthias %A Staehle, Dirk %A Pries, Rastin %B EuroView2009 %C Würzburg, Germany %D 2009 %T Monitoring YouTube Performance in Wireless Mesh Networks
• A Genetic Approach for Wireless Mesh Network Planning and Optimization. Pries, Rastin; Staehle, Dirk; Stoykova, Marieta; Staehle, Barbara; Tran-Gia, Phuoc. In IWCMC 2009 Planning and Optimization of Wireless Communication Networks (PlanNet). Leipzig, Germany, 2009.
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  Wireless Mesh Networks (WMNs) are gaining an increasingly important role in next generation last mile access. They offer more flexibility compared to traditional networks but on the expense of a complex structure. Thus, planning and optimization of WMNs is a challenge. In this paper we focus on routing and channel assignment in WMNs for throughput maximization using genetic algorithms. Genetic algorithms provide a good solution for large-scale WMNs in relatively small computation time. The results prove the effectiveness of the genetic operators and show the advantages of a genetic optimization. However, these operators have to be configured carefully to avoid local optima. We will show the influence of the selection principles as well as evaluation functions on the optimization.

  @inproceedings{info3-inproceedings-2009-349, abstract = {Wireless Mesh Networks (WMNs) are gaining an increasingly important role in next generation last mile access. They offer more flexibility compared to traditional networks but on the expense of a complex structure. Thus, planning and optimization of WMNs is a challenge. In this paper we focus on routing and channel assignment in WMNs for throughput maximization using genetic algorithms. Genetic algorithms provide a good solution for large-scale WMNs in relatively small computation time. The results prove the effectiveness of the genetic operators and show the advantages of a genetic optimization. However, these operators have to be configured carefully to avoid local optima. We will show the influence of the selection principles as well as evaluation functions on the optimization.}, address = {Leipzig, Germany}, author = {Pries, Rastin and Staehle, Dirk and Stoykova, Marieta and Staehle, Barbara and Tran-Gia, Phuoc}, booktitle = {IWCMC 2009 Planning and Optimization of Wireless Communication Networks (PlanNet)}, keywords = {sys:hidden:inproceedings}, month = {06}, title = {A Genetic Approach for Wireless Mesh Network Planning and Optimization}, year = 2009 }

  %0 Conference Paper %1 info3-inproceedings-2009-349 %A Pries, Rastin %A Staehle, Dirk %A Stoykova, Marieta %A Staehle, Barbara %A Tran-Gia, Phuoc %B IWCMC 2009 Planning and Optimization of Wireless Communication Networks (PlanNet) %C Leipzig, Germany %D 2009 %T A Genetic Approach for Wireless Mesh Network Planning and Optimization %X Wireless Mesh Networks (WMNs) are gaining an increasingly important role in next generation last mile access. They offer more flexibility compared to traditional networks but on the expense of a complex structure. Thus, planning and optimization of WMNs is a challenge. In this paper we focus on routing and channel assignment in WMNs for throughput maximization using genetic algorithms. Genetic algorithms provide a good solution for large-scale WMNs in relatively small computation time. The results prove the effectiveness of the genetic operators and show the advantages of a genetic optimization. However, these operators have to be configured carefully to avoid local optima. We will show the influence of the selection principles as well as evaluation functions on the optimization.

• IEEE 802.16 Capacity Enhancement Using an Adaptive TDD Split. Pries, Rastin; Staehle, Dirk; Marsico, Daniel. In IEEE VTC Spring 08. Singapore, 2008.
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  In urban areas, users have become more and more accustomed to the availability of broadband access. However, in rural and suburban areas, it is often too expensive for network providers to serve every user with traditional wired broadband access such as DSL or cable modem. In such areas, WiMAX (worldwide interoperability for microwave access) networks based on the IEEE 802.16 standard are the most promising solution. In this paper, we focus on the performance of the IEEE 802.16 time division duplex (TDD) mode in rural areas with only one cell. When using TDD, the duration of the downlink and uplink subframe can be set individually, which is called adaptive time division duplex (ATDD). However, the ratio between downlink and uplink is normally set to a fixed value. We will show the performance of different fixed downlink/uplink ratios for several traffic models. Furthermore, we propose an algorithm for an adaptive downlink/uplink boundary in dependence on the current traffic load in the cell. The results show an enormous performance gain compared to the fixed settings.

  @inproceedings{info3-inproceedings-2008-304, abstract = {In urban areas, users have become more and more accustomed to the availability of broadband access. However, in rural and suburban areas, it is often too expensive for network providers to serve every user with traditional wired broadband access such as DSL or cable modem. In such areas, WiMAX (worldwide interoperability for microwave access) networks based on the IEEE 802.16 standard are the most promising solution. In this paper, we focus on the performance of the IEEE 802.16 time division duplex (TDD) mode in rural areas with only one cell. When using TDD, the duration of the downlink and uplink subframe can be set individually, which is called adaptive time division duplex (ATDD). However, the ratio between downlink and uplink is normally set to a fixed value. We will show the performance of different fixed downlink/uplink ratios for several traffic models. Furthermore, we propose an algorithm for an adaptive downlink/uplink boundary in dependence on the current traffic load in the cell. The results show an enormous performance gain compared to the fixed settings.}, address = {Singapore}, author = {Pries, Rastin and Staehle, Dirk and Marsico, Daniel}, booktitle = {IEEE VTC Spring 08}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {IEEE 802.16 Capacity Enhancement Using an Adaptive TDD Split}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-304 %A Pries, Rastin %A Staehle, Dirk %A Marsico, Daniel %B IEEE VTC Spring 08 %C Singapore %D 2008 %T IEEE 802.16 Capacity Enhancement Using an Adaptive TDD Split %X In urban areas, users have become more and more accustomed to the availability of broadband access. However, in rural and suburban areas, it is often too expensive for network providers to serve every user with traditional wired broadband access such as DSL or cable modem. In such areas, WiMAX (worldwide interoperability for microwave access) networks based on the IEEE 802.16 standard are the most promising solution. In this paper, we focus on the performance of the IEEE 802.16 time division duplex (TDD) mode in rural areas with only one cell. When using TDD, the duration of the downlink and uplink subframe can be set individually, which is called adaptive time division duplex (ATDD). However, the ratio between downlink and uplink is normally set to a fixed value. We will show the performance of different fixed downlink/uplink ratios for several traffic models. Furthermore, we propose an algorithm for an adaptive downlink/uplink boundary in dependence on the current traffic load in the cell. The results show an enormous performance gain compared to the fixed settings.
• Radio Resource Management Strategies for HSDPA-enhanced UMTS Networks. Staehle, Dirk; Mäder, Andreas. In Wireless Multimedia: Quality of Service and Solutions, L. M. Nikki Cranley (ed.). IGI Global, 2008.
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  @incollection{info3-incollection-2008-6, author = {Staehle, Dirk and Mäder, Andreas}, booktitle = {Wireless Multimedia: Quality of Service and Solutions}, editor = {Nikki Cranley, Liam Murphy}, keywords = {myown}, publisher = {IGI Global}, title = {Radio Resource Management Strategies for HSDPA-enhanced UMTS Networks}, year = 2008 }

  %0 Book Section %1 info3-incollection-2008-6 %A Staehle, Dirk %A Mäder, Andreas %B Wireless Multimedia: Quality of Service and Solutions %D 2008 %E Nikki Cranley, Liam Murphy %I IGI Global %T Radio Resource Management Strategies for HSDPA-enhanced UMTS Networks
• A Seamless Vertical Handover Approach. Pries, Rastin; Staehle, Dirk; Tran-Gia, Phuoc; Gutbrod, Thorsten. In Wireless and Mobility 2008, LNCS 5122. Barcelona, Spain, 2008.
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  @inproceedings{info3-inproceedings-2008-326, address = {Barcelona, Spain}, author = {Pries, Rastin and Staehle, Dirk and Tran-Gia, Phuoc and Gutbrod, Thorsten}, booktitle = {Wireless and Mobility 2008, LNCS 5122}, keywords = {sys:hidden:inproceedings}, month = {01}, title = {A Seamless Vertical Handover Approach}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-326 %A Pries, Rastin %A Staehle, Dirk %A Tran-Gia, Phuoc %A Gutbrod, Thorsten %B Wireless and Mobility 2008, LNCS 5122 %C Barcelona, Spain %D 2008 %T A Seamless Vertical Handover Approach
• VoIP Service Performance Optimization in Pre-IEEE 802.11s Wireless Mesh Networks. Bayer, Nico; Cavalcanti de Castro, Marcel; Dely, Peter; Kassler, Andreas; Koucheryavy, Yevgeni; Mitoraj, Piotr; Staehle, Dirk. In IEEE ICCSC 2008. Shanghai, China, 2008.
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  @inproceedings{info3-inproceedings-2008-332, address = {Shanghai, China}, author = {Bayer, Nico and Cavalcanti de Castro, Marcel and Dely, Peter and Kassler, Andreas and Koucheryavy, Yevgeni and Mitoraj, Piotr and Staehle, Dirk}, booktitle = {IEEE ICCSC 2008}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {VoIP Service Performance Optimization in Pre-IEEE 802.11s Wireless Mesh Networks}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-332 %A Bayer, Nico %A Cavalcanti de Castro, Marcel %A Dely, Peter %A Kassler, Andreas %A Koucheryavy, Yevgeni %A Mitoraj, Piotr %A Staehle, Dirk %B IEEE ICCSC 2008 %C Shanghai, China %D 2008 %T VoIP Service Performance Optimization in Pre-IEEE 802.11s Wireless Mesh Networks
• Principles and Practice of Wireless Mesh Networks for the Future Internet. Staehle, Dirk; Kassler, Andreas; Koucheryavy, Yevgeni. Singapore, 2008, May.
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  @misc{info3-tutorial-2008-11, address = {Singapore}, author = {Staehle, Dirk and Kassler, Andreas and Koucheryavy, Yevgeni}, booktitle = {IEEE VTC Spring}, keywords = {sys:hidden:tutorial}, month = {05}, title = {Principles and Practice of Wireless Mesh Networks for the Future Internet}, year = 2008 }

  %0 Generic %1 info3-tutorial-2008-11 %A Staehle, Dirk %A Kassler, Andreas %A Koucheryavy, Yevgeni %B IEEE VTC Spring %C Singapore %D 2008 %T Principles and Practice of Wireless Mesh Networks for the Future Internet
• Dynamic Bandwidth Control in Wireless Mesh Networks: A Quality of Experience based Approach. Pries, Rastin; Hock, David; Bayer, Nico; Siebert, Matthias; Staehle, Dirk; Rakocevic, Veselin; Xu, Bangnan; Tran-Gia, Phuoc. In 18th ITC Specialist Seminar on Quality of Experience. Karlskrona, Sweden, 2008.
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  Wireless Mesh Networks (WMNs) are gaining an increasingly important role in next generation wireless networks. Due to their advantages over other wireless and wired networks, WMNs are undergoing rapid progress and are supposed to deliver wireless services for a large variety of applications. Especially real-time applications such as voice over IP make high demands on wireless mesh networks. A small change of the Quality-of-Service (QoS) metrics like packet loss, delay, and jitter have a significant impact on the Quality-of-Experience (QoE), a subjective measure from the user perspective of the overall value of the provided service or application. In this paper, we present a dynamic bandwidth control mechanism which measures the current situation in the network and adapts the bandwidth in order to ensure a high QoE level. The mechanism is implemented in a Wireless LAN mesh testbed and the results show that real-time applications are successfully protected from disturbing best effort traffic flows.

  @inproceedings{info3-inproceedings-2008-317, abstract = {Wireless Mesh Networks (WMNs) are gaining an increasingly important role in next generation wireless networks. Due to their advantages over other wireless and wired networks, WMNs are undergoing rapid progress and are supposed to deliver wireless services for a large variety of applications. Especially real-time applications such as voice over IP make high demands on wireless mesh networks. A small change of the Quality-of-Service (QoS) metrics like packet loss, delay, and jitter have a significant impact on the Quality-of-Experience (QoE), a subjective measure from the user perspective of the overall value of the provided service or application. In this paper, we present a dynamic bandwidth control mechanism which measures the current situation in the network and adapts the bandwidth in order to ensure a high QoE level. The mechanism is implemented in a Wireless LAN mesh testbed and the results show that real-time applications are successfully protected from disturbing best effort traffic flows.}, address = {Karlskrona, Sweden}, author = {Pries, Rastin and Hock, David and Bayer, Nico and Siebert, Matthias and Staehle, Dirk and Rakocevic, Veselin and Xu, Bangnan and Tran-Gia, Phuoc}, booktitle = {18th ITC Specialist Seminar on Quality of Experience}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {Dynamic Bandwidth Control in Wireless Mesh Networks: A Quality of Experience based Approach}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-317 %A Pries, Rastin %A Hock, David %A Bayer, Nico %A Siebert, Matthias %A Staehle, Dirk %A Rakocevic, Veselin %A Xu, Bangnan %A Tran-Gia, Phuoc %B 18th ITC Specialist Seminar on Quality of Experience %C Karlskrona, Sweden %D 2008 %T Dynamic Bandwidth Control in Wireless Mesh Networks: A Quality of Experience based Approach %X Wireless Mesh Networks (WMNs) are gaining an increasingly important role in next generation wireless networks. Due to their advantages over other wireless and wired networks, WMNs are undergoing rapid progress and are supposed to deliver wireless services for a large variety of applications. Especially real-time applications such as voice over IP make high demands on wireless mesh networks. A small change of the Quality-of-Service (QoS) metrics like packet loss, delay, and jitter have a significant impact on the Quality-of-Experience (QoE), a subjective measure from the user perspective of the overall value of the provided service or application. In this paper, we present a dynamic bandwidth control mechanism which measures the current situation in the network and adapts the bandwidth in order to ensure a high QoE level. The mechanism is implemented in a Wireless LAN mesh testbed and the results show that real-time applications are successfully protected from disturbing best effort traffic flows.
• Speech Quality Aware Admission Control for fixed IEEE 802.16 Wireless MAN. Michael Bohnert, Thomas; Staehle, Dirk; Kuo, Geng-Sheng; Koucheryavy, Yevgeni; Monteiro, Edmundo. In IEEE ICC. Beijing, China, 2008.
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  @inproceedings{info3-inproceedings-2008-324, address = {Beijing, China}, author = {Michael Bohnert, Thomas and Staehle, Dirk and Kuo, Geng-Sheng and Koucheryavy, Yevgeni and Monteiro, Edmundo}, booktitle = {IEEE ICC}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {Speech Quality Aware Admission Control for fixed IEEE 802.16 Wireless MAN}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-324 %A Michael Bohnert, Thomas %A Staehle, Dirk %A Kuo, Geng-Sheng %A Koucheryavy, Yevgeni %A Monteiro, Edmundo %B IEEE ICC %C Beijing, China %D 2008 %T Speech Quality Aware Admission Control for fixed IEEE 802.16 Wireless MAN
• QoS Provisioning in WLAN Mesh Networks Using Dynamic Bandwidth Control. Hock, David; Bayer, Nico; Pries, Rastin; Siebert, Matthias; Staehle, Dirk; Rakocevic, Veselin; Xu, Bangnan. In European Wireless 2008, p. 7. Prague, Czech Republic, 2008.
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  WLAN, based on the IEEE 802.11 standard has been extensively studied since its release. In addition to infrastructure access to WLAN, mesh networks currently attract a lot of attention. This comes from the envisioned advantages of wireless mesh networks, such as cheap installation costs, extended coverage, robustness, easy maintenance, and self-configuration possibilities. In this paper we focus on Quality of Service support for multimedia applications in WLAN-based mesh networks. Therefore, a dynamic bandwidth control mechanism is implemented on the network layer and the results show that high prioritized traffic can be protected from disturbing best effort traffic.

  @inproceedings{info3-inproceedings-2008-316, abstract = {WLAN, based on the IEEE 802.11 standard has been extensively studied since its release. In addition to infrastructure access to WLAN, mesh networks currently attract a lot of attention. This comes from the envisioned advantages of wireless mesh networks, such as cheap installation costs, extended coverage, robustness, easy maintenance, and self-configuration possibilities. In this paper we focus on Quality of Service support for multimedia applications in WLAN-based mesh networks. Therefore, a dynamic bandwidth control mechanism is implemented on the network layer and the results show that high prioritized traffic can be protected from disturbing best effort traffic.}, address = {Prague, Czech Republic}, author = {Hock, David and Bayer, Nico and Pries, Rastin and Siebert, Matthias and Staehle, Dirk and Rakocevic, Veselin and Xu, Bangnan}, booktitle = {European Wireless 2008}, keywords = {sys:hidden:inproceedings}, month = {06}, pages = 7, title = {QoS Provisioning in WLAN Mesh Networks Using Dynamic Bandwidth Control}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-316 %A Hock, David %A Bayer, Nico %A Pries, Rastin %A Siebert, Matthias %A Staehle, Dirk %A Rakocevic, Veselin %A Xu, Bangnan %B European Wireless 2008 %C Prague, Czech Republic %D 2008 %P 7 %T QoS Provisioning in WLAN Mesh Networks Using Dynamic Bandwidth Control %X WLAN, based on the IEEE 802.11 standard has been extensively studied since its release. In addition to infrastructure access to WLAN, mesh networks currently attract a lot of attention. This comes from the envisioned advantages of wireless mesh networks, such as cheap installation costs, extended coverage, robustness, easy maintenance, and self-configuration possibilities. In this paper we focus on Quality of Service support for multimedia applications in WLAN-based mesh networks. Therefore, a dynamic bandwidth control mechanism is implemented on the network layer and the results show that high prioritized traffic can be protected from disturbing best effort traffic.
• Dynamic Contention Window Adaptation (DCWA) in IEEE 802.11e Wireless Local Area Networks. Pries, Rastin; Menth, Stefan; Staehle, Dirk; Menth, Michael; Tran-Gia, Phuoc. In The Second International Conference on Communications and Electronics, HUT-ICCE 2008, pp. 92–97. Hoi An, Vietnam, 2008.
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  The Wireless LAN Medium Access Control (MAC) protocol is responsible for an efficient sharing of the limited communication bandwidth. With the demand for Quality of Service (QoS), which is supported by different traffic classes in 802.11e, this task becomes even more complex. In this paper, we present a Dynamic Contention Window Adaptation (DCWA) algorithm which adapts the contention window parameters for a single traffic class such that they are as small as possible to meet realtime conditions and large enough to cope with the current network load. The results reveal that the DCWA increases the overall cell capacity significantly compared to the fixed IEEE standard settings, it adaptively minimizes the contention delay when possible and maximizes the throughput when needed. Furthermore, we extended the method to handle competing high and low priority traffic and showed that the new mechanism can effectively protect voice from best effort traffic.

  @inproceedings{info3-inproceedings-2008-322, abstract = {The Wireless LAN Medium Access Control (MAC) protocol is responsible for an efficient sharing of the limited communication bandwidth. With the demand for Quality of Service (QoS), which is supported by different traffic classes in 802.11e, this task becomes even more complex. In this paper, we present a Dynamic Contention Window Adaptation (DCWA) algorithm which adapts the contention window parameters for a single traffic class such that they are as small as possible to meet realtime conditions and large enough to cope with the current network load. The results reveal that the DCWA increases the overall cell capacity significantly compared to the fixed IEEE standard settings, it adaptively minimizes the contention delay when possible and maximizes the throughput when needed. Furthermore, we extended the method to handle competing high and low priority traffic and showed that the new mechanism can effectively protect voice from best effort traffic.}, address = {Hoi An, Vietnam}, author = {Pries, Rastin and Menth, Stefan and Staehle, Dirk and Menth, Michael and Tran-Gia, Phuoc}, booktitle = {The Second International Conference on Communications and Electronics, HUT-ICCE 2008}, keywords = {sys:hidden:inproceedings}, month = {06}, pages = {92–97}, title = {Dynamic Contention Window Adaptation (DCWA) in IEEE 802.11e Wireless Local Area Networks}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-322 %A Pries, Rastin %A Menth, Stefan %A Staehle, Dirk %A Menth, Michael %A Tran-Gia, Phuoc %B The Second International Conference on Communications and Electronics, HUT-ICCE 2008 %C Hoi An, Vietnam %D 2008 %P 92--97 %T Dynamic Contention Window Adaptation (DCWA) in IEEE 802.11e Wireless Local Area Networks %X The Wireless LAN Medium Access Control (MAC) protocol is responsible for an efficient sharing of the limited communication bandwidth. With the demand for Quality of Service (QoS), which is supported by different traffic classes in 802.11e, this task becomes even more complex. In this paper, we present a Dynamic Contention Window Adaptation (DCWA) algorithm which adapts the contention window parameters for a single traffic class such that they are as small as possible to meet realtime conditions and large enough to cope with the current network load. The results reveal that the DCWA increases the overall cell capacity significantly compared to the fixed IEEE standard settings, it adaptively minimizes the contention delay when possible and maximizes the throughput when needed. Furthermore, we extended the method to handle competing high and low priority traffic and showed that the new mechanism can effectively protect voice from best effort traffic.
• A New Approach for Managing Traffic of Overlay Applications of the SmoothIT Project. Fernandez-Palacios Gimenez, Juan Pedro; Angeles Callejo Rodriguez, Maria; Hasan, Hasan; Hoßfeld, Tobias; Staehle, Dirk; Despotovic, Zoran; Kellerer, Wolfgang; Pussep, Konstantin; Papafili, Ioanna; Stamoulis, George D.; Stiller, Burkhard. In 2nd International Conference on Autonomous Infrastructure, Management and Security (AIMS 2008). Bremen, Germany, 2008.
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  Overlay networks emerged in the last decade and generate now a large portion of the Internet traffic [Internet07]. Even though they were initially associated exclusively with copyright infringements and, thus, provoked considerable public odium, their good properties supersede and the overlay networking technology is here to stay. On one hand, overlay networks can provide specific applications without being supported by current underlay network, e.g., multicast. On the other hand, the client-server model does not scale in different respects, and many content distributors find it more efficient to deliver their content using overlay networks. For example, free Linux distributions (e.g., Red Hat’s Fedora or Debian) are distributed via BitTorrent. Furthermore, the Internet traffic stemming from overlay-based applications, e.g., Peer-to-Peer (P2P) applications, increases rapidly with the increase of available bandwidth of end-nodes. Therefore, a slow paradigm shift from centrally offered services to services offered by end-nodes is in progress. For today’s Telecommunication Service Providers (telcos) and Internet Service Providers (ISP) the key issue arising is how to control and manage network traffic stemming from such overlaybased applications. As the structure of overlays determines traffic flows in ISP networks, it is highly efficient for an ISP to influence the overlay configuration based on information on their structure. Thus, the management of overlays aims (a) to maximize the benefit for multiple operators/ISPs involved and (b) to increase the capability to withstand faults and balancing the network load. Traditional traffic engineering methodologies are insufficient to satisfy simultaneously the provider’s goal to maximize network usage and the user’s goal to maximize his utility, since most of current overlay networks are deployed oblivious of the underlying physical network [Awduche99]. E.g., traffic between two nodes in the Telefonica network in Madrid can go via Tokyo, incurring large and unnecessary costs. This is why network operators show a strong interest in influencing overlay network operations and shaping the overlay traffic as to comply with their needs. Within that context, SmoothIT proposes a new traffic management mechanism termed Economic Traffic Management (ETM), which provides for an incentivecompatibility in those interactions foreseen between overlay applications and the underlying ISP networks in order to gain the following measurable impacts: 1. Cost saving for ISPs: lower operation costs, due to ETM-based traffic engineering, lower interconnection costs, since traffic can be kept inside an ISP’s domain, and lower capacity extension cost, since capacity requirements can be forecasted with much higher accuracy. 2. Lower prices for end-users, due to competitive pricing by the ISP, which are enabled by new ETM mechanisms. 3. Better Quality-of-Service (QoS) for overlay-based applications across ISP domains, due to the usage of ETM-based traffic engineering. This leads to an improved media consumption experience for end users.

  @inproceedings{info3-inproceedings-2008-321, abstract = {Overlay networks emerged in the last decade and generate now a large portion of the Internet traffic [Internet07]. Even though they were initially associated exclusively with copyright infringements and, thus, provoked considerable public odium, their good properties supersede and the overlay networking technology is here to stay. On one hand, overlay networks can provide specific applications without being supported by current underlay network, e.g., multicast. On the other hand, the client-server model does not scale in different respects, and many content distributors find it more efficient to deliver their content using overlay networks. For example, free Linux distributions (e.g., Red Hat’s Fedora or Debian) are distributed via BitTorrent. Furthermore, the Internet traffic stemming from overlay-based applications, e.g., Peer-to-Peer (P2P) applications, increases rapidly with the increase of available bandwidth of end-nodes. Therefore, a slow paradigm shift from centrally offered services to services offered by end-nodes is in progress. For today’s Telecommunication Service Providers (telcos) and Internet Service Providers (ISP) the key issue arising is how to control and manage network traffic stemming from such overlaybased applications. As the structure of overlays determines traffic flows in ISP networks, it is highly efficient for an ISP to influence the overlay configuration based on information on their structure. Thus, the management of overlays aims (a) to maximize the benefit for multiple operators/ISPs involved and (b) to increase the capability to withstand faults and balancing the network load. Traditional traffic engineering methodologies are insufficient to satisfy simultaneously the provider’s goal to maximize network usage and the user’s goal to maximize his utility, since most of current overlay networks are deployed oblivious of the underlying physical network [Awduche99]. E.g., traffic between two nodes in the Telefonica network in Madrid can go via Tokyo, incurring large and unnecessary costs. This is why network operators show a strong interest in influencing overlay network operations and shaping the overlay traffic as to comply with their needs. Within that context, SmoothIT proposes a new traffic management mechanism termed Economic Traffic Management (ETM), which provides for an incentivecompatibility in those interactions foreseen between overlay applications and the underlying ISP networks in order to gain the following measurable impacts: 1. Cost saving for ISPs: lower operation costs, due to ETM-based traffic engineering, lower interconnection costs, since traffic can be kept inside an ISP’s domain, and lower capacity extension cost, since capacity requirements can be forecasted with much higher accuracy. 2. Lower prices for end-users, due to competitive pricing by the ISP, which are enabled by new ETM mechanisms. 3. Better Quality-of-Service (QoS) for overlay-based applications across ISP domains, due to the usage of ETM-based traffic engineering. This leads to an improved media consumption experience for end users.}, address = {Bremen, Germany}, author = {Fernandez-Palacios Gimenez, Juan Pedro and Angeles Callejo Rodriguez, Maria and Hasan, Hasan and Hoßfeld, Tobias and Staehle, Dirk and Despotovic, Zoran and Kellerer, Wolfgang and Pussep, Konstantin and Papafili, Ioanna and Stamoulis, George D. and Stiller, Burkhard}, booktitle = {2nd International Conference on Autonomous Infrastructure, Management and Security (AIMS 2008)}, keywords = {sys:hidden:inproceedings}, month = {07}, title = {A New Approach for Managing Traffic of Overlay Applications of the SmoothIT Project}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-321 %A Fernandez-Palacios Gimenez, Juan Pedro %A Angeles Callejo Rodriguez, Maria %A Hasan, Hasan %A Hoßfeld, Tobias %A Staehle, Dirk %A Despotovic, Zoran %A Kellerer, Wolfgang %A Pussep, Konstantin %A Papafili, Ioanna %A Stamoulis, George D. %A Stiller, Burkhard %B 2nd International Conference on Autonomous Infrastructure, Management and Security (AIMS 2008) %C Bremen, Germany %D 2008 %T A New Approach for Managing Traffic of Overlay Applications of the SmoothIT Project %X Overlay networks emerged in the last decade and generate now a large portion of the Internet traffic [Internet07]. Even though they were initially associated exclusively with copyright infringements and, thus, provoked considerable public odium, their good properties supersede and the overlay networking technology is here to stay. On one hand, overlay networks can provide specific applications without being supported by current underlay network, e.g., multicast. On the other hand, the client-server model does not scale in different respects, and many content distributors find it more efficient to deliver their content using overlay networks. For example, free Linux distributions (e.g., Red Hat’s Fedora or Debian) are distributed via BitTorrent. Furthermore, the Internet traffic stemming from overlay-based applications, e.g., Peer-to-Peer (P2P) applications, increases rapidly with the increase of available bandwidth of end-nodes. Therefore, a slow paradigm shift from centrally offered services to services offered by end-nodes is in progress. For today’s Telecommunication Service Providers (telcos) and Internet Service Providers (ISP) the key issue arising is how to control and manage network traffic stemming from such overlaybased applications. As the structure of overlays determines traffic flows in ISP networks, it is highly efficient for an ISP to influence the overlay configuration based on information on their structure. Thus, the management of overlays aims (a) to maximize the benefit for multiple operators/ISPs involved and (b) to increase the capability to withstand faults and balancing the network load. Traditional traffic engineering methodologies are insufficient to satisfy simultaneously the provider’s goal to maximize network usage and the user’s goal to maximize his utility, since most of current overlay networks are deployed oblivious of the underlying physical network [Awduche99]. E.g., traffic between two nodes in the Telefonica network in Madrid can go via Tokyo, incurring large and unnecessary costs. This is why network operators show a strong interest in influencing overlay network operations and shaping the overlay traffic as to comply with their needs. Within that context, SmoothIT proposes a new traffic management mechanism termed Economic Traffic Management (ETM), which provides for an incentivecompatibility in those interactions foreseen between overlay applications and the underlying ISP networks in order to gain the following measurable impacts: 1. Cost saving for ISPs: lower operation costs, due to ETM-based traffic engineering, lower interconnection costs, since traffic can be kept inside an ISP’s domain, and lower capacity extension cost, since capacity requirements can be forecasted with much higher accuracy. 2. Lower prices for end-users, due to competitive pricing by the ISP, which are enabled by new ETM mechanisms. 3. Better Quality-of-Service (QoS) for overlay-based applications across ISP domains, due to the usage of ETM-based traffic engineering. This leads to an improved media consumption experience for end users.
• On the Usability of Genetic Algorithms for Wireless Mesh Network Planning and Optimization. Technical Report (451), . Pries, Rastin; Staehle, Dirk; Stoykova, Marieta. University of Wuerzburg, 2008.
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  @techreport{info3-techreport-2008-240, author = {Pries, Rastin and Staehle, Dirk and Stoykova, Marieta}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 11, number = 451, title = {On the Usability of Genetic Algorithms for Wireless Mesh Network Planning and Optimization}, year = 2008 }

  %0 Report %1 info3-techreport-2008-240 %A Pries, Rastin %A Staehle, Dirk %A Stoykova, Marieta %D 2008 %N 451 %T On the Usability of Genetic Algorithms for Wireless Mesh Network Planning and Optimization
• Performance Evaluation of the Information Sink in a Multi-Probe Statistical Anomaly Detection System. Zinner, Thomas; Staehle, Dirk; Tran-Gia, Phuoc; Mäder, Andreas; Tutschku, Kurt. In Australasian Telecommunication Networks and Applications Conference 2008. Adelaide, 2008.
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  @inproceedings{info3-inproceedings-2008-329, address = {Adelaide}, author = {Zinner, Thomas and Staehle, Dirk and Tran-Gia, Phuoc and Mäder, Andreas and Tutschku, Kurt}, booktitle = {Australasian Telecommunication Networks and Applications Conference 2008}, keywords = {sys:hidden:inproceedings}, month = 12, title = {Performance Evaluation of the Information Sink in a Multi-Probe Statistical Anomaly Detection System}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-329 %A Zinner, Thomas %A Staehle, Dirk %A Tran-Gia, Phuoc %A Mäder, Andreas %A Tutschku, Kurt %B Australasian Telecommunication Networks and Applications Conference 2008 %C Adelaide %D 2008 %T Performance Evaluation of the Information Sink in a Multi-Probe Statistical Anomaly Detection System
• A framework of economic traffic management employing self-organization overlay mechanisms. Oechsner, Simon; Soursos, Sergios; Papafili, Ioanna; Hoßfeld, Tobias; Stamoulis, George D.; Stiller, Burkhard; Angeles Callejo, Maria; Staehle, Dirk. In IWSOS’08. Vienna, Austria, 2008.
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  Applications based on overlays have become very popular, due to the separation they provide and the improvement of perceived QoS by the end-user. Recent studies show that overlays have a significant impact on the traffic management and the expenditures of the underlying network operators. In this paper, we define a framework for Economic Traffic Management (ETM) mechanisms that optimize the traffic impact of overlay applications on ISP and telecommunication operator networks based on the interaction of network operators, overlay providers and users. We first provide a definition and an overview of Self- Organization Mechanisms (SOMs) and ETM for overlays. We then describe a basic framework for the interaction of components of SOMs and ETM, in terms of information and metrics provided, decisions made etc. Finally, we describe in detail how SOMs can be used to support ETM and we illustrate our approach and its implications by means of a specific example.

  @inproceedings{info3-inproceedings-2008-331, abstract = {Applications based on overlays have become very popular, due to the separation they provide and the improvement of perceived QoS by the end-user. Recent studies show that overlays have a significant impact on the traffic management and the expenditures of the underlying network operators. In this paper, we define a framework for Economic Traffic Management (ETM) mechanisms that optimize the traffic impact of overlay applications on ISP and telecommunication operator networks based on the interaction of network operators, overlay providers and users. We first provide a definition and an overview of Self- Organization Mechanisms (SOMs) and ETM for overlays. We then describe a basic framework for the interaction of components of SOMs and ETM, in terms of information and metrics provided, decisions made etc. Finally, we describe in detail how SOMs can be used to support ETM and we illustrate our approach and its implications by means of a specific example.}, address = {Vienna, Austria}, author = {Oechsner, Simon and Soursos, Sergios and Papafili, Ioanna and Hoßfeld, Tobias and Stamoulis, George D. and Stiller, Burkhard and Angeles Callejo, Maria and Staehle, Dirk}, booktitle = {IWSOS'08}, keywords = {sys:hidden:inproceedings}, month = 12, title = {A framework of economic traffic management employing self-organization overlay mechanisms}, year = 2008 }

  %0 Conference Paper %1 info3-inproceedings-2008-331 %A Oechsner, Simon %A Soursos, Sergios %A Papafili, Ioanna %A Hoßfeld, Tobias %A Stamoulis, George D. %A Stiller, Burkhard %A Angeles Callejo, Maria %A Staehle, Dirk %B IWSOS'08 %C Vienna, Austria %D 2008 %T A framework of economic traffic management employing self-organization overlay mechanisms %X Applications based on overlays have become very popular, due to the separation they provide and the improvement of perceived QoS by the end-user. Recent studies show that overlays have a significant impact on the traffic management and the expenditures of the underlying network operators. In this paper, we define a framework for Economic Traffic Management (ETM) mechanisms that optimize the traffic impact of overlay applications on ISP and telecommunication operator networks based on the interaction of network operators, overlay providers and users. We first provide a definition and an overview of Self- Organization Mechanisms (SOMs) and ETM for overlays. We then describe a basic framework for the interaction of components of SOMs and ETM, in terms of information and metrics provided, decisions made etc. Finally, we describe in detail how SOMs can be used to support ETM and we illustrate our approach and its implications by means of a specific example.
• 15th International Conference on Telecommunications, ICT 2008 and MACOM 2008 Workshop Proceedings. Koucheryavy, Yevgeni; Tkachenko, Dmitry; Osipov, Evgeny; Vinel, Alexey; Staehle, Dirk; Aghvami, Hamid; Marvasti, Farokh; Daneshmand, Mahmoud; Dohler, Mischa; Michael Bohnert, Thomas. IEEE Computer Society Press, 2008.
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  @book{info3-book-2008-11, author = {Koucheryavy, Yevgeni and Tkachenko, Dmitry and Osipov, Evgeny and Vinel, Alexey and Staehle, Dirk and Aghvami, Hamid and Marvasti, Farokh and Daneshmand, Mahmoud and Dohler, Mischa and Michael Bohnert, Thomas}, keywords = {sys:hidden:book}, month = {06}, publisher = {IEEE Computer Society Press}, title = {15th International Conference on Telecommunications, ICT 2008 and MACOM 2008 Workshop Proceedings}, year = 2008 }

  %0 Book %1 info3-book-2008-11 %A Koucheryavy, Yevgeni %A Tkachenko, Dmitry %A Osipov, Evgeny %A Vinel, Alexey %A Staehle, Dirk %A Aghvami, Hamid %A Marvasti, Farokh %A Daneshmand, Mahmoud %A Dohler, Mischa %A Michael Bohnert, Thomas %D 2008 %I IEEE Computer Society Press %T 15th International Conference on Telecommunications, ICT 2008 and MACOM 2008 Workshop Proceedings

• Comparison of Preemptive and Preserving Admission Control for the UMTS Enhanced Uplink. Mäder, Andreas; Staehle, Dirk. In KiVS 2007. Bern, Switzerland, 2007.
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  @inproceedings{info3-inproceedings-2007-257, address = {Bern, Switzerland}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {KiVS 2007}, keywords = {sys:hidden:inproceedings}, month = {02}, title = {Comparison of Preemptive and Preserving Admission Control for the UMTS Enhanced Uplink}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-257 %A Mäder, Andreas %A Staehle, Dirk %B KiVS 2007 %C Bern, Switzerland %D 2007 %T Comparison of Preemptive and Preserving Admission Control for the UMTS Enhanced Uplink
• Random Multiple Access in WiMAX: Problems and Solutions. Vinel, Alexey; Staehle, Dirk; Pries, Rastin. In 1st Workshop on WiMAX Wireless and Mobility (WEIRD) in conjunction with the WWIC 2007 Conference. Coimbra, Portugal, 2007.
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  @inproceedings{info3-inproceedings-2007-275, address = {Coimbra, Portugal}, author = {Vinel, Alexey and Staehle, Dirk and Pries, Rastin}, booktitle = {1st Workshop on WiMAX Wireless and Mobility (WEIRD) in conjunction with the WWIC 2007 Conference}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {Random Multiple Access in WiMAX: Problems and Solutions}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-275 %A Vinel, Alexey %A Staehle, Dirk %A Pries, Rastin %B 1st Workshop on WiMAX Wireless and Mobility (WEIRD) in conjunction with the WWIC 2007 Conference %C Coimbra, Portugal %D 2007 %T Random Multiple Access in WiMAX: Problems and Solutions
• Performance of Header Compression for VoIP in Wireless LANs. Technical Report (403), . Pries, Rastin; Mäder, Andreas; Staehle, Dirk. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-202, author = {Pries, Rastin and Mäder, Andreas and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, number = 403, title = {Performance of Header Compression for VoIP in Wireless LANs}, year = 2007 }

  %0 Report %1 info3-techreport-2007-202 %A Pries, Rastin %A Mäder, Andreas %A Staehle, Dirk %D 2007 %N 403 %T Performance of Header Compression for VoIP in Wireless LANs
• Impact of Energy Models on Energy Efficient Sensor Network Routing. Technical Report (415), . Emmert, Barbara; Staehle, Dirk. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-208, author = {Emmert, Barbara and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, number = 415, title = {Impact of Energy Models on Energy Efficient Sensor Network Routing}, year = 2007 }

  %0 Report %1 info3-techreport-2007-208 %A Emmert, Barbara %A Staehle, Dirk %D 2007 %N 415 %T Impact of Energy Models on Energy Efficient Sensor Network Routing
• Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks. Technical Report (410), . Mäder, Andreas; Staehle, Dirk; Spahn, Markus. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-221, author = {Mäder, Andreas and Staehle, Dirk and Spahn, Markus}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, number = 410, title = {Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks}, year = 2007 }

  %0 Report %1 info3-techreport-2007-221 %A Mäder, Andreas %A Staehle, Dirk %A Spahn, Markus %D 2007 %N 410 %T Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks
• QoS of Internet Access with GPRS. Staehle, Dirk; Leibnitz, Kenji; Tsipotis, Konstantin. In Wireless Networks, 9, pp. 213–222. 2007.
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  @article{info3-article-2003-12, author = {Staehle, Dirk and Leibnitz, Kenji and Tsipotis, Konstantin}, journal = {Wireless Networks}, keywords = {sys:hidden:article}, pages = {213–222}, title = {QoS of Internet Access with GPRS}, volume = 9, year = 2007 }

  %0 Journal Article %1 info3-article-2003-12 %A Staehle, Dirk %A Leibnitz, Kenji %A Tsipotis, Konstantin %D 2007 %J Wireless Networks %P 213--222 %T QoS of Internet Access with GPRS %V 9
• A Novel Performance Model for the HSDPA with Adaptive Resource Allocation. Technical Report (409), . Mäder, Andreas; Staehle, Dirk; Barth, Hans. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-222, author = {Mäder, Andreas and Staehle, Dirk and Barth, Hans}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {01}, number = 409, title = {A Novel Performance Model for the HSDPA with Adaptive Resource Allocation}, year = 2007 }

  %0 Report %1 info3-techreport-2007-222 %A Mäder, Andreas %A Staehle, Dirk %A Barth, Hans %D 2007 %N 409 %T A Novel Performance Model for the HSDPA with Adaptive Resource Allocation
• Feasible Load Regions for different RRM Strategies for the Enhanced Uplink in UMTS Networks. Mäder, Andreas; Staehle, Dirk; Liu, Tuo; Barth, Hans. In LNCS Volume 4369, Wireless Systems and Mobility in Next Generation Internet. 2007.
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  @inproceedings{info3-inproceedings-2007-258, author = {Mäder, Andreas and Staehle, Dirk and Liu, Tuo and Barth, Hans}, booktitle = {LNCS Volume 4369, Wireless Systems and Mobility in Next Generation Internet}, keywords = {sys:hidden:inproceedings}, month = {01}, title = {Feasible Load Regions for different RRM Strategies for the Enhanced Uplink in UMTS Networks}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-258 %A Mäder, Andreas %A Staehle, Dirk %A Liu, Tuo %A Barth, Hans %B LNCS Volume 4369, Wireless Systems and Mobility in Next Generation Internet %D 2007 %T Feasible Load Regions for different RRM Strategies for the Enhanced Uplink in UMTS Networks
• On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity. Technical Report (413), . Staehle, Dirk. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-209, author = {Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, number = 413, title = {On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity}, year = 2007 }

  %0 Report %1 info3-techreport-2007-209 %A Staehle, Dirk %D 2007 %N 413 %T On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity
• Source Traffic Modeling of Wireless Applications. Tran-Gia, Phuoc; Staehle, Dirk; Leibnitz, Kenji. In International Journal of Electronics and Communications, 55. 2007.
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  @article{info3-article-2001-9, author = {Tran-Gia, Phuoc and Staehle, Dirk and Leibnitz, Kenji}, journal = {International Journal of Electronics and Communications}, keywords = {sys:hidden:article}, title = {Source Traffic Modeling of Wireless Applications}, volume = 55, year = 2007 }

  %0 Journal Article %1 info3-article-2001-9 %A Tran-Gia, Phuoc %A Staehle, Dirk %A Leibnitz, Kenji %D 2007 %J International Journal of Electronics and Communications %T Source Traffic Modeling of Wireless Applications %V 55
• On the Performance of Mobile IP in Wireless LAN Environments. Pries, Rastin; Mäder, Andreas; Staehle, Dirk; Wiesen, Matthias. In Wireless Systems and Mobility, LNCS 4396, pp. 155–170. Sitges, Spain, 2007.
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  @inproceedings{info3-inproceedings-2007-325, address = {Sitges, Spain}, author = {Pries, Rastin and Mäder, Andreas and Staehle, Dirk and Wiesen, Matthias}, booktitle = {Wireless Systems and Mobility, LNCS 4396}, keywords = {sys:hidden:inproceedings}, pages = {155–170}, title = {On the Performance of Mobile IP in Wireless LAN Environments}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-325 %A Pries, Rastin %A Mäder, Andreas %A Staehle, Dirk %A Wiesen, Matthias %B Wireless Systems and Mobility, LNCS 4396 %C Sitges, Spain %D 2007 %P 155--170 %T On the Performance of Mobile IP in Wireless LAN Environments
• A Model for Time-Efficient HSDPA Simulations. Technical Report (414), . Staehle, Dirk; Mäder, Andreas. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-210, author = {Staehle, Dirk and Mäder, Andreas}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, number = 414, title = {A Model for Time-Efficient HSDPA Simulations}, year = 2007 }

  %0 Report %1 info3-techreport-2007-210 %A Staehle, Dirk %A Mäder, Andreas %D 2007 %N 414 %T A Model for Time-Efficient HSDPA Simulations
• Impact of Vertical Handovers on Cooperative Content Distribution Systems. Technical Report (428), . Duelli, Michael; Hoßfeld, Tobias; Staehle, Dirk. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-223, author = {Duelli, Michael and Hoßfeld, Tobias and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {06}, number = 428, title = {Impact of Vertical Handovers on Cooperative Content Distribution Systems}, year = 2007 }

  %0 Report %1 info3-techreport-2007-223 %A Duelli, Michael %A Hoßfeld, Tobias %A Staehle, Dirk %D 2007 %N 428 %T Impact of Vertical Handovers on Cooperative Content Distribution Systems
• A Novel Performance Model for the HSDPA with Adaptive Resource Allocation. Mäder, Andreas; Staehle, Dirk. In ITC 20. Ottawa, Canada, 2007.
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  @inproceedings{info3-inproceedings-2007-267, address = {Ottawa, Canada}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {ITC 20}, keywords = {sys:hidden:inproceedings}, month = {06}, title = {A Novel Performance Model for the HSDPA with Adaptive Resource Allocation}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-267 %A Mäder, Andreas %A Staehle, Dirk %B ITC 20 %C Ottawa, Canada %D 2007 %T A Novel Performance Model for the HSDPA with Adaptive Resource Allocation
• Performance of Internet Services over the UMTS Enhanced Uplink. Mäder, Andreas; Staehle, Dirk; Gößwein, Christian. In Proc. of 1st Workshop on Broadband Wireless Access. Cardiff, Wales, GB, 2007.
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  @inproceedings{info3-inproceedings-2007-287, address = {Cardiff, Wales, GB}, author = {Mäder, Andreas and Staehle, Dirk and Gößwein, Christian}, booktitle = {Proc. of 1st Workshop on Broadband Wireless Access}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Performance of Internet Services over the UMTS Enhanced Uplink}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-287 %A Mäder, Andreas %A Staehle, Dirk %A Gößwein, Christian %B Proc. of 1st Workshop on Broadband Wireless Access %C Cardiff, Wales, GB %D 2007 %T Performance of Internet Services over the UMTS Enhanced Uplink
• A flow-level Simulation Framework for HSDPA-enabled UMTS Networks. Mäder, Andreas; Staehle, Dirk. In ACM/IEEE MSWiM ’07. Crete, Greece, 2007.
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  @inproceedings{info3-inproceedings-2007-289, address = {Crete, Greece}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {ACM/IEEE MSWiM '07}, keywords = {sys:hidden:inproceedings}, month = 10, title = {A flow-level Simulation Framework for HSDPA-enabled UMTS Networks}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-289 %A Mäder, Andreas %A Staehle, Dirk %B ACM/IEEE MSWiM '07 %C Crete, Greece %D 2007 %T A flow-level Simulation Framework for HSDPA-enabled UMTS Networks
• Performance Analysis of the Polling Scheme in IEEE 802.16. Vinel, Alexey; Staehle, Dirk; Pries, Rastin; Ni, Qiang. In Distributed Computer and Communication Networks (DCCN-2007): Theory and Applications. Moskow, Russia, 2007.
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  @inproceedings{info3-inproceedings-2007-297, address = {Moskow, Russia}, author = {Vinel, Alexey and Staehle, Dirk and Pries, Rastin and Ni, Qiang}, booktitle = {Distributed Computer and Communication Networks (DCCN-2007): Theory and Applications}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Performance Analysis of the Polling Scheme in IEEE 802.16}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-297 %A Vinel, Alexey %A Staehle, Dirk %A Pries, Rastin %A Ni, Qiang %B Distributed Computer and Communication Networks (DCCN-2007): Theory and Applications %C Moskow, Russia %D 2007 %T Performance Analysis of the Polling Scheme in IEEE 802.16
• A New Perspective on the Unfair Channel Access Phenomenon in Wireless Local Area Networks. Technical Report (439), . Pries, Rastin; Staehle, Dirk; Oechsner, Simon; Menth, Michael; Menth, Stefan. University of Wuerzburg, 2007.
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  @techreport{info3-techreport-2007-228, author = {Pries, Rastin and Staehle, Dirk and Oechsner, Simon and Menth, Michael and Menth, Stefan}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 12, number = 439, title = {A New Perspective on the Unfair Channel Access Phenomenon in Wireless Local Area Networks}, year = 2007 }

  %0 Report %1 info3-techreport-2007-228 %A Pries, Rastin %A Staehle, Dirk %A Oechsner, Simon %A Menth, Michael %A Menth, Stefan %D 2007 %N 439 %T A New Perspective on the Unfair Channel Access Phenomenon in Wireless Local Area Networks
• Impact of HSDPA Transmit Power Allocation Schemes on the Performance of UMTS Networks. Mäder, Andreas; Staehle, Dirk; Pries, Rastin; Spahn, Markus. In Australasian Telecommunication Networks and Applications Conference 2007. Christchurch, New Zealand, 2007.
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  @inproceedings{info3-inproceedings-2007-298, address = {Christchurch, New Zealand}, author = {Mäder, Andreas and Staehle, Dirk and Pries, Rastin and Spahn, Markus}, booktitle = {Australasian Telecommunication Networks and Applications Conference 2007}, keywords = {sys:hidden:inproceedings}, month = 12, title = {Impact of HSDPA Transmit Power Allocation Schemes on the Performance of UMTS Networks}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-298 %A Mäder, Andreas %A Staehle, Dirk %A Pries, Rastin %A Spahn, Markus %B Australasian Telecommunication Networks and Applications Conference 2007 %C Christchurch, New Zealand %D 2007 %T Impact of HSDPA Transmit Power Allocation Schemes on the Performance of UMTS Networks
• A Model for Time-Efficient HSDPA Simulations. Staehle, Dirk; Mäder, Andreas. In IEEE VTC Fall ’07. Baltimore, USA, 2007.
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  @inproceedings{info3-inproceedings-2007-278, address = {Baltimore, USA}, author = {Staehle, Dirk and Mäder, Andreas}, booktitle = {IEEE VTC Fall '07}, keywords = {sys:hidden:inproceedings}, month = 10, title = {A Model for Time-Efficient HSDPA Simulations}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-278 %A Staehle, Dirk %A Mäder, Andreas %B IEEE VTC Fall '07 %C Baltimore, USA %D 2007 %T A Model for Time-Efficient HSDPA Simulations
• Impact of Energy Models on Energy Efficient Sensor Network Routing. Staehle, Barbara; Staehle, Dirk. In 4th IEEE International Conference on Mobile Ad-hoc and Sensor Systems. Pisa, Italy, 2007.
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  Models and proposals for capturing the energy consumption of sensor nodes are plentiful. The majority of those approaches roughly agree about the energy consumed in the states of the sensor node duty cycle, but the costs of radio operations are abstracted very differently. In our work, we establish a general framework whose modular structure allows to compare existing abstractions and to investigate which factors are crucial for the modeling of transmission costs. We analyze the influence of typical assumptions on the creation of energy efficient routing topologies. For this purpose the resulting routing trees are not only compared by topological characteristics, but also by estimating radio related energy consumptions, a metric which changes strongly with the MAC layer efficiency.

  @inproceedings{info3-inproceedings-2007-288, abstract = {Models and proposals for capturing the energy consumption of sensor nodes are plentiful. The majority of those approaches roughly agree about the energy consumed in the states of the sensor node duty cycle, but the costs of radio operations are abstracted very differently. In our work, we establish a general framework whose modular structure allows to compare existing abstractions and to investigate which factors are crucial for the modeling of transmission costs. We analyze the influence of typical assumptions on the creation of energy efficient routing topologies. For this purpose the resulting routing trees are not only compared by topological characteristics, but also by estimating radio related energy consumptions, a metric which changes strongly with the MAC layer efficiency.}, address = {Pisa, Italy}, author = {Staehle, Barbara and Staehle, Dirk}, booktitle = {4th IEEE International Conference on Mobile Ad-hoc and Sensor Systems}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Impact of Energy Models on Energy Efficient Sensor Network Routing}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-288 %A Staehle, Barbara %A Staehle, Dirk %B 4th IEEE International Conference on Mobile Ad-hoc and Sensor Systems %C Pisa, Italy %D 2007 %T Impact of Energy Models on Energy Efficient Sensor Network Routing %X Models and proposals for capturing the energy consumption of sensor nodes are plentiful. The majority of those approaches roughly agree about the energy consumed in the states of the sensor node duty cycle, but the costs of radio operations are abstracted very differently. In our work, we establish a general framework whose modular structure allows to compare existing abstractions and to investigate which factors are crucial for the modeling of transmission costs. We analyze the influence of typical assumptions on the creation of energy efficient routing topologies. For this purpose the resulting routing trees are not only compared by topological characteristics, but also by estimating radio related energy consumptions, a metric which changes strongly with the MAC layer efficiency.
• A Novel Linear-Programming Based Approach for Near-Optimal Rate Allocation in the UMTS Enhanced Uplink. Liu, Tuo; Mäder, Andreas; Staehle, Dirk. In Proc. of IEEE WiMob. White Plains, New York, USA, 2007.
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  @inproceedings{info3-inproceedings-2007-285, address = {White Plains, New York, USA}, author = {Liu, Tuo and Mäder, Andreas and Staehle, Dirk}, booktitle = {Proc. of IEEE WiMob}, keywords = {sys:hidden:inproceedings}, month = 10, title = {A Novel Linear-Programming Based Approach for Near-Optimal Rate Allocation in the UMTS Enhanced Uplink}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-285 %A Liu, Tuo %A Mäder, Andreas %A Staehle, Dirk %B Proc. of IEEE WiMob %C White Plains, New York, USA %D 2007 %T A Novel Linear-Programming Based Approach for Near-Optimal Rate Allocation in the UMTS Enhanced Uplink
• Analytical Other-Cell Interference Characterization over HSUPA-Enabled Multi-cell UMTS Networks. Liu, Tuo; Mäder, Andreas; Staehle, Dirk. In IEEE VTC Fall ’07. Baltimore, USA, 2007.
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  @inproceedings{info3-inproceedings-2007-279, address = {Baltimore, USA}, author = {Liu, Tuo and Mäder, Andreas and Staehle, Dirk}, booktitle = {IEEE VTC Fall '07}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Analytical Other-Cell Interference Characterization over HSUPA-Enabled Multi-cell UMTS Networks}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-279 %A Liu, Tuo %A Mäder, Andreas %A Staehle, Dirk %B IEEE VTC Fall '07 %C Baltimore, USA %D 2007 %T Analytical Other-Cell Interference Characterization over HSUPA-Enabled Multi-cell UMTS Networks
• Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks. Mäder, Andreas; Staehle, Dirk; Spahn, Markus. In IEEE VTC Fall ’07. Baltimore, USA, 2007.
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  @inproceedings{info3-inproceedings-2007-277, address = {Baltimore, USA}, author = {Mäder, Andreas and Staehle, Dirk and Spahn, Markus}, booktitle = {IEEE VTC Fall '07}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-277 %A Mäder, Andreas %A Staehle, Dirk %A Spahn, Markus %B IEEE VTC Fall '07 %C Baltimore, USA %D 2007 %T Impact of HSDPA Radio Resource Allocation Schemes on the System Performance of UMTS Networks
• Performance Evaluation of Piggyback Requests in IEEE 802.16. Pries, Rastin; Staehle, Dirk; Marsico, Daniel. In IEEE VTC Fall 07. Baltimore, MD, USA, 2007.
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  WiMAX (Worldwide Interoperability for Microwave Access) is a wireless access technology that aims to provide last mile wireless broadband access for fixed and mobile users as an alternative to the wired DSL and cable access. It is specified in the IEEE 802.16 standard. The standard defines several possible bandwidth request methods that can be implemented in an actual deployment of a WiMAX network. In this paper, we will study the performance of two different bandwidth request mechanisms, namely piggyback and broadcast requests and will show in which situations piggybacking performs better than the contention based broadcast bandwidth requests.

  @inproceedings{info3-inproceedings-2007-280, abstract = {WiMAX (Worldwide Interoperability for Microwave Access) is a wireless access technology that aims to provide last mile wireless broadband access for fixed and mobile users as an alternative to the wired DSL and cable access. It is specified in the IEEE 802.16 standard. The standard defines several possible bandwidth request methods that can be implemented in an actual deployment of a WiMAX network. In this paper, we will study the performance of two different bandwidth request mechanisms, namely piggyback and broadcast requests and will show in which situations piggybacking performs better than the contention based broadcast bandwidth requests.}, address = {Baltimore, MD, USA}, author = {Pries, Rastin and Staehle, Dirk and Marsico, Daniel}, booktitle = {IEEE VTC Fall 07}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Performance Evaluation of Piggyback Requests in IEEE 802.16}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-280 %A Pries, Rastin %A Staehle, Dirk %A Marsico, Daniel %B IEEE VTC Fall 07 %C Baltimore, MD, USA %D 2007 %T Performance Evaluation of Piggyback Requests in IEEE 802.16 %X WiMAX (Worldwide Interoperability for Microwave Access) is a wireless access technology that aims to provide last mile wireless broadband access for fixed and mobile users as an alternative to the wired DSL and cable access. It is specified in the IEEE 802.16 standard. The standard defines several possible bandwidth request methods that can be implemented in an actual deployment of a WiMAX network. In this paper, we will study the performance of two different bandwidth request mechanisms, namely piggyback and broadcast requests and will show in which situations piggybacking performs better than the contention based broadcast bandwidth requests.
• Analytic Modeling of the UMTS Enhanced Uplink in Multi-Cell Environments with Volume-Based Best-Effort Traffic. Liu, Tuo; Mäder, Andreas; Staehle, Dirk; Everitt, David. In IEEE ISCIT ’07. Sydney, Australia, 2007.
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  @inproceedings{info3-inproceedings-2007-296, address = {Sydney, Australia}, author = {Liu, Tuo and Mäder, Andreas and Staehle, Dirk and Everitt, David}, booktitle = {IEEE ISCIT '07}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Analytic Modeling of the UMTS Enhanced Uplink in Multi-Cell Environments with Volume-Based Best-Effort Traffic}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-296 %A Liu, Tuo %A Mäder, Andreas %A Staehle, Dirk %A Everitt, David %B IEEE ISCIT '07 %C Sydney, Australia %D 2007 %T Analytic Modeling of the UMTS Enhanced Uplink in Multi-Cell Environments with Volume-Based Best-Effort Traffic
• Impact of Vertical Handovers on Cooperative Content Distribution Systems. Duelli, Michael; Hoßfeld, Tobias; Staehle, Dirk. In Seventh IEEE International Conference on Peer-to-Peer Computing (P2P2007), pp. 177–184. Best Student Paper, Galway, Ireland, 2007.
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  In this paper, we evaluate the performance of a P2P-based content distribution system in heterogeneous, wireless networks. The mobile users coordinate each other with cooperation strategies enabled by the multi-source download mechanism, as in eDonkey or BitTorrent. Due to the mobility, vertical handovers between different wireless access technologies are required which may result in transmission delays and IP address changes of the switching peer. Hence, connections among users have to be reestablished and downloading users are requeued at a providing peer’s waiting queue. In detail, we investigate the impact of requeueing with each VHO as well as the use of mechanisms that preserve the IP address and connections beyond VHOs, like MobileIP. Another important phenomenon occurring with VHOs is the abrupt change of the available bandwidth, e.g., from a fast WLAN connection to a rather slow UMTS connection. We evaluate the download times for files by means of simulation while considering different load scenarios in today’s and future network layouts of the B3G network. As a result of the performance evaluation, we derive a new time-based cooperation strategy that counters the impact of mobility. Instead of downloading individual blocks of a file, a user gets a time slot at a providing peer. We show that this leads to a significant performance gain.

  @inproceedings{info3-inproceedings-2007-290, abstract = {In this paper, we evaluate the performance of a P2P-based content distribution system in heterogeneous, wireless networks. The mobile users coordinate each other with cooperation strategies enabled by the multi-source download mechanism, as in eDonkey or BitTorrent. Due to the mobility, vertical handovers between different wireless access technologies are required which may result in transmission delays and IP address changes of the switching peer. Hence, connections among users have to be reestablished and downloading users are requeued at a providing peer’s waiting queue. In detail, we investigate the impact of requeueing with each VHO as well as the use of mechanisms that preserve the IP address and connections beyond VHOs, like MobileIP. Another important phenomenon occurring with VHOs is the abrupt change of the available bandwidth, e.g., from a fast WLAN connection to a rather slow UMTS connection. We evaluate the download times for files by means of simulation while considering different load scenarios in today’s and future network layouts of the B3G network. As a result of the performance evaluation, we derive a new time-based cooperation strategy that counters the impact of mobility. Instead of downloading individual blocks of a file, a user gets a time slot at a providing peer. We show that this leads to a significant performance gain.}, address = {Best Student Paper, Galway, Ireland}, author = {Duelli, Michael and Hoßfeld, Tobias and Staehle, Dirk}, booktitle = {Seventh IEEE International Conference on Peer-to-Peer Computing (P2P2007)}, keywords = {sys:hidden:inproceedings}, month = {09}, pages = {177–184}, title = {Impact of Vertical Handovers on Cooperative Content Distribution Systems}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-290 %A Duelli, Michael %A Hoßfeld, Tobias %A Staehle, Dirk %B Seventh IEEE International Conference on Peer-to-Peer Computing (P2P2007) %C Best Student Paper, Galway, Ireland %D 2007 %P 177--184 %T Impact of Vertical Handovers on Cooperative Content Distribution Systems %X In this paper, we evaluate the performance of a P2P-based content distribution system in heterogeneous, wireless networks. The mobile users coordinate each other with cooperation strategies enabled by the multi-source download mechanism, as in eDonkey or BitTorrent. Due to the mobility, vertical handovers between different wireless access technologies are required which may result in transmission delays and IP address changes of the switching peer. Hence, connections among users have to be reestablished and downloading users are requeued at a providing peer’s waiting queue. In detail, we investigate the impact of requeueing with each VHO as well as the use of mechanisms that preserve the IP address and connections beyond VHOs, like MobileIP. Another important phenomenon occurring with VHOs is the abrupt change of the available bandwidth, e.g., from a fast WLAN connection to a rather slow UMTS connection. We evaluate the download times for files by means of simulation while considering different load scenarios in today’s and future network layouts of the B3G network. As a result of the performance evaluation, we derive a new time-based cooperation strategy that counters the impact of mobility. Instead of downloading individual blocks of a file, a user gets a time slot at a providing peer. We show that this leads to a significant performance gain.
• Comparative Study of the IEEE 802.16 Random Access Mechanisms. Staehle, Dirk; Pries, Rastin. In 1st Broadband Wireless Access Workshop (BWAWS), pp. 334–339. Cardiff, UK, 2007.
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  The WiMAX technology based on the IEEE802.16 standard is currently the most prospective candidate for broadband wireless access networks. One of the key issues is the design of the MAC layer, in particular the multiple access scheme. The IEEE 802.16 standard specifies different scheduling services with individual mechanisms for accessing the channel on the uplink. The non-real-time polling service and the best-effort service mainly rely on a contention mechanism to submit bandwidth requests to the base station. These two services are currently used for all types of traffic with unknown characteristics, i.e. typically all traffic except for some special VoIP connection with known codec. In this paper, we evaluate and compare the performance of the contention mechanisms for fixed and mobile WiMAX.

  @inproceedings{info3-inproceedings-2007-313, abstract = {The WiMAX technology based on the IEEE802.16 standard is currently the most prospective candidate for broadband wireless access networks. One of the key issues is the design of the MAC layer, in particular the multiple access scheme. The IEEE 802.16 standard specifies different scheduling services with individual mechanisms for accessing the channel on the uplink. The non-real-time polling service and the best-effort service mainly rely on a contention mechanism to submit bandwidth requests to the base station. These two services are currently used for all types of traffic with unknown characteristics, i.e. typically all traffic except for some special VoIP connection with known codec. In this paper, we evaluate and compare the performance of the contention mechanisms for fixed and mobile WiMAX.}, address = {Cardiff, UK}, author = {Staehle, Dirk and Pries, Rastin}, booktitle = {1st Broadband Wireless Access Workshop (BWAWS)}, keywords = {sys:hidden:inproceedings}, month = {09}, pages = {334–339}, title = {Comparative Study of the IEEE 802.16 Random Access Mechanisms}, year = 2007 }

  %0 Conference Paper %1 info3-inproceedings-2007-313 %A Staehle, Dirk %A Pries, Rastin %B 1st Broadband Wireless Access Workshop (BWAWS) %C Cardiff, UK %D 2007 %P 334--339 %T Comparative Study of the IEEE 802.16 Random Access Mechanisms %X The WiMAX technology based on the IEEE802.16 standard is currently the most prospective candidate for broadband wireless access networks. One of the key issues is the design of the MAC layer, in particular the multiple access scheme. The IEEE 802.16 standard specifies different scheduling services with individual mechanisms for accessing the channel on the uplink. The non-real-time polling service and the best-effort service mainly rely on a contention mechanism to submit bandwidth requests to the base station. These two services are currently used for all types of traffic with unknown characteristics, i.e. typically all traffic except for some special VoIP connection with known codec. In this paper, we evaluate and compare the performance of the contention mechanisms for fixed and mobile WiMAX.

• Feasible Load Regions for different RRM Strategies for the Enhanced Uplink in UMTS Networks. Technical Report (387), . Mäder, Andreas; Staehle, Dirk; Liu, Tony; Barth, Hans. University of Wuerzburg, 2006.
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  @techreport{info3-techreport-2006-231, author = {Mäder, Andreas and Staehle, Dirk and Liu, Tony and Barth, Hans}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {06}, number = 387, title = {Feasible Load Regions for different RRM Strategies for the Enhanced Uplink in UMTS Networks}, year = 2006 }

  %0 Report %1 info3-techreport-2006-231 %A Mäder, Andreas %A Staehle, Dirk %A Liu, Tony %A Barth, Hans %D 2006 %N 387 %T Feasible Load Regions for different RRM Strategies for the Enhanced Uplink in UMTS Networks
• Measurements in a Laboratory UMTS Network with time-varying Loads and different Admission Control Strategies. Mäder, Andreas; Wagner, Bartosz; Hoßfeld, Tobias; Staehle, Dirk; Barth, Hans. In 4th International Workshop on Internet Performance, Simulation, Monitoring and Measurement. Salzburg, Austria, 2006.
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  Most measurement studies in the literature on UMTS focus on scenarios which are set up as ”real” as possible. The focus of this study is the performance and the system behaviour in a nearly ideal laboratory system, such that external influences like other-cell interference or fading are eliminated. We performed experiments on load, throughput and timeliness behaviour with UMTS NodeB hardware of two different brands. The results show different admission control and hardware resource management strategies in high load situations which may impact the performance of applications like voice over IP and the modeling of admission control for dedicated channel radio bearers.

  @inproceedings{info3-inproceedings-2006-215, abstract = {Most measurement studies in the literature on UMTS focus on scenarios which are set up as ”real” as possible. The focus of this study is the performance and the system behaviour in a nearly ideal laboratory system, such that external influences like other-cell interference or fading are eliminated. We performed experiments on load, throughput and timeliness behaviour with UMTS NodeB hardware of two different brands. The results show different admission control and hardware resource management strategies in high load situations which may impact the performance of applications like voice over IP and the modeling of admission control for dedicated channel radio bearers.}, address = {Salzburg, Austria}, author = {Mäder, Andreas and Wagner, Bartosz and Hoßfeld, Tobias and Staehle, Dirk and Barth, Hans}, booktitle = {4th International Workshop on Internet Performance, Simulation, Monitoring and Measurement}, keywords = {sys:hidden:inproceedings}, month = {02}, title = {Measurements in a Laboratory UMTS Network with time-varying Loads and different Admission Control Strategies}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-215 %A Mäder, Andreas %A Wagner, Bartosz %A Hoßfeld, Tobias %A Staehle, Dirk %A Barth, Hans %B 4th International Workshop on Internet Performance, Simulation, Monitoring and Measurement %C Salzburg, Austria %D 2006 %T Measurements in a Laboratory UMTS Network with time-varying Loads and different Admission Control Strategies %X Most measurement studies in the literature on UMTS focus on scenarios which are set up as ”real” as possible. The focus of this study is the performance and the system behaviour in a nearly ideal laboratory system, such that external influences like other-cell interference or fading are eliminated. We performed experiments on load, throughput and timeliness behaviour with UMTS NodeB hardware of two different brands. The results show different admission control and hardware resource management strategies in high load situations which may impact the performance of applications like voice over IP and the modeling of admission control for dedicated channel radio bearers.
• When Do We Need Rate Control for Dedicated Channels in UMTS?. Hoßfeld, Tobias; Mäder, Andreas; Staehle, Dirk. In 2006 IEEE 63rd Vehicular Technology Conference. Melbourne, Australia, 2006.
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  The Universal Mobile Telecommunication System (UMTS) offers rate controlled radio bearers for best effort traffic. The purpose of rate control is to maximize resource utilization and concurrently to provide best-effort users with an acceptable grade-of-service. Due to the user behaviour or the used application of a mobile subscriber we distinguish between two types of best-effort users. The time-based users stay for a certain time within the network and download an arbitrary amount of data. Volume-based users leave the network after they have downloaded a specific data volume. The contribution of this work is an evaluation of time-based and volume-based best-effort traffic over rate-controlled DCHs by analytic means and with a detailed packet-level simulation. The results of both approaches are qualitative equal: while the rate control mechanism works effectively for time-based users and allows any rate, the assigned rates for the volume-based users take values between two extremes, either the minimal or the maximal rate.

  @inproceedings{info3-inproceedings-2006-223, abstract = {The Universal Mobile Telecommunication System (UMTS) offers rate controlled radio bearers for best effort traffic. The purpose of rate control is to maximize resource utilization and concurrently to provide best-effort users with an acceptable grade-of-service. Due to the user behaviour or the used application of a mobile subscriber we distinguish between two types of best-effort users. The time-based users stay for a certain time within the network and download an arbitrary amount of data. Volume-based users leave the network after they have downloaded a specific data volume. The contribution of this work is an evaluation of time-based and volume-based best-effort traffic over rate-controlled DCHs by analytic means and with a detailed packet-level simulation. The results of both approaches are qualitative equal: while the rate control mechanism works effectively for time-based users and allows any rate, the assigned rates for the volume-based users take values between two extremes, either the minimal or the maximal rate.}, address = {Melbourne, Australia}, author = {Hoßfeld, Tobias and Mäder, Andreas and Staehle, Dirk}, booktitle = {2006 IEEE 63rd Vehicular Technology Conference}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {When Do We Need Rate Control for Dedicated Channels in UMTS?}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-223 %A Hoßfeld, Tobias %A Mäder, Andreas %A Staehle, Dirk %B 2006 IEEE 63rd Vehicular Technology Conference %C Melbourne, Australia %D 2006 %T When Do We Need Rate Control for Dedicated Channels in UMTS? %X The Universal Mobile Telecommunication System (UMTS) offers rate controlled radio bearers for best effort traffic. The purpose of rate control is to maximize resource utilization and concurrently to provide best-effort users with an acceptable grade-of-service. Due to the user behaviour or the used application of a mobile subscriber we distinguish between two types of best-effort users. The time-based users stay for a certain time within the network and download an arbitrary amount of data. Volume-based users leave the network after they have downloaded a specific data volume. The contribution of this work is an evaluation of time-based and volume-based best-effort traffic over rate-controlled DCHs by analytic means and with a detailed packet-level simulation. The results of both approaches are qualitative equal: while the rate control mechanism works effectively for time-based users and allows any rate, the assigned rates for the volume-based users take values between two extremes, either the minimal or the maximal rate.
• On the soft and code capacity of the UMTS downlink. Staehle, Dirk. 6th COST 290 Management Committee Meeeting, Bern, Switzerland, 2006, May 9.
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  @presentation{info3-talk-2006-190, address = {6th COST 290 Management Committee Meeeting, Bern, Switzerland}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {05}, title = {On the soft and code capacity of the UMTS downlink}, year = 2006 }

  %0 Generic %1 info3-talk-2006-190 %A Staehle, Dirk %C 6th COST 290 Management Committee Meeeting, Bern, Switzerland %D 2006 %T On the soft and code capacity of the UMTS downlink
• Interference Estimation for the HSDPA Service in Heterogeneous UMTS Networks. Mäder, Andreas; Staehle, Dirk. In EuroNGI Workshop on. Loveno di Menaggio, Como, Italy, 2006.
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  @inproceedings{info3-inproceedings-2006-211, address = {Loveno di Menaggio, Como, Italy}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {EuroNGI Workshop on}, keywords = {sys:hidden:inproceedings}, title = {Interference Estimation for the HSDPA Service in Heterogeneous UMTS Networks}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-211 %A Mäder, Andreas %A Staehle, Dirk %B EuroNGI Workshop on %C Loveno di Menaggio, Como, Italy %D 2006 %T Interference Estimation for the HSDPA Service in Heterogeneous UMTS Networks
• Performance Study of the WiMAX FDD Mode. Klein, Alexander; Pries, Rastin; Staehle, Dirk. In OPNETWORK 2006. Washington D.C., USA, 2006.
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  @inproceedings{info3-inproceedings-2006-245, address = {Washington D.C., USA}, author = {Klein, Alexander and Pries, Rastin and Staehle, Dirk}, booktitle = {OPNETWORK 2006}, keywords = {sys:hidden:inproceedings}, month = {08}, title = {Performance Study of the WiMAX FDD Mode}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-245 %A Klein, Alexander %A Pries, Rastin %A Staehle, Dirk %B OPNETWORK 2006 %C Washington D.C., USA %D 2006 %T Performance Study of the WiMAX FDD Mode
• A Network Architecture for a Policy-Based Handover Across Heterogeneous Networks. Pries, Rastin; Mäder, Andreas; Staehle, Dirk. In OPNETWORK 2006. Washington D.C., USA, 2006.
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  @inproceedings{info3-inproceedings-2006-244, address = {Washington D.C., USA}, author = {Pries, Rastin and Mäder, Andreas and Staehle, Dirk}, booktitle = {OPNETWORK 2006}, keywords = {sys:hidden:inproceedings}, month = {08}, title = {A Network Architecture for a Policy-Based Handover Across Heterogeneous Networks}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-244 %A Pries, Rastin %A Mäder, Andreas %A Staehle, Dirk %B OPNETWORK 2006 %C Washington D.C., USA %D 2006 %T A Network Architecture for a Policy-Based Handover Across Heterogeneous Networks
• Do we need Header Compression for VoIP in Wireless LANs?. Pries, Rastin; Mäder, Andreas; Staehle, Dirk. In 12th EUNICE Open European Summer School 2006. Stuttgart, Germany, 2006.
  • [ BibTeX ]
  • [ EndNote ]
  @inproceedings{info3-inproceedings-2006-243, address = {Stuttgart, Germany}, author = {Pries, Rastin and Mäder, Andreas and Staehle, Dirk}, booktitle = {12th EUNICE Open European Summer School 2006}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Do we need Header Compression for VoIP in Wireless LANs?}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-243 %A Pries, Rastin %A Mäder, Andreas %A Staehle, Dirk %B 12th EUNICE Open European Summer School 2006 %C Stuttgart, Germany %D 2006 %T Do we need Header Compression for VoIP in Wireless LANs?
• An Analytical Model for Best Effort Traffic over the UMTS Enhanced Uplink. Mäder, Andreas; Staehle, Dirk. In Proc. of VTC Fall ’06. Montreal, CA, 2006.
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  @inproceedings{info3-inproceedings-2006-232, address = {Montreal, CA}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {Proc. of VTC Fall '06}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {An Analytical Model for Best Effort Traffic over the UMTS Enhanced Uplink}, year = 2006 }

  %0 Conference Paper %1 info3-inproceedings-2006-232 %A Mäder, Andreas %A Staehle, Dirk %B Proc. of VTC Fall '06 %C Montreal, CA %D 2006 %T An Analytical Model for Best Effort Traffic over the UMTS Enhanced Uplink
• UMTS Load Metrics for a Policy-Based Vertical Handover Framework. Technical Report (395), . Pries, Rastin; Mäder, Andreas; Staehle, Dirk. University of Wuerzburg, 2006.
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  @techreport{info3-techreport-2006-199, author = {Pries, Rastin and Mäder, Andreas and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 11, number = 395, title = {UMTS Load Metrics for a Policy-Based Vertical Handover Framework}, year = 2006 }

  %0 Report %1 info3-techreport-2006-199 %A Pries, Rastin %A Mäder, Andreas %A Staehle, Dirk %D 2006 %N 395 %T UMTS Load Metrics for a Policy-Based Vertical Handover Framework

• A Hybrid Model of the UMTS Downlink Capacity with WWW Traffic on Dedicated Channels. Hoßfeld, Tobias; Staehle, Dirk. In Mobile and Wireless Systems, LNCS 3427, pp. 20–35. Dagstuhl, Germany, 2005.
  • [ Abstract ]
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  One of the main advances of 3G networks like UMTS is the ability to support a large variety of different services. These services are subdivided in two domains, circuit-switched services and packet-switched services. The main application expected for packet-switched services is the browsing of the World Wide Web. The web traffic is usually described by quite sophisticated source traffic models and the packet arrivals on IP layer are determined by TCP. On the other hand, the planning process for UMTS networks relies on analytic methods or Monte Carlo simulations that assume the number of users to be Poisson distributed. The intention of this work is to examine if it is possible to apply the existing planning methods to web traffic. We are able to show that the Poisson assumption holds for the number of web users that simultaneously transmit over the air interface and that the resulting NodeB transmit power distribution is valid. We use the Monte Carlo simulation technique to evaluate the web capacity of an example UMTS network.

  @inproceedings{info3-inproceedings-2005-159, abstract = {One of the main advances of 3G networks like UMTS is the ability to support a large variety of different services. These services are subdivided in two domains, circuit-switched services and packet-switched services. The main application expected for packet-switched services is the browsing of the World Wide Web. The web traffic is usually described by quite sophisticated source traffic models and the packet arrivals on IP layer are determined by TCP. On the other hand, the planning process for UMTS networks relies on analytic methods or Monte Carlo simulations that assume the number of users to be Poisson distributed. The intention of this work is to examine if it is possible to apply the existing planning methods to web traffic. We are able to show that the Poisson assumption holds for the number of web users that simultaneously transmit over the air interface and that the resulting NodeB transmit power distribution is valid. We use the Monte Carlo simulation technique to evaluate the web capacity of an example UMTS network.}, address = {Dagstuhl, Germany}, author = {Hoßfeld, Tobias and Staehle, Dirk}, booktitle = {Mobile and Wireless Systems, LNCS 3427}, keywords = {sys:hidden:inproceedings}, month = {01}, pages = {20-35}, title = {A Hybrid Model of the UMTS Downlink Capacity with WWW Traffic on Dedicated Channels}, year = 2005 }

  %0 Conference Paper %1 info3-inproceedings-2005-159 %A Hoßfeld, Tobias %A Staehle, Dirk %B Mobile and Wireless Systems, LNCS 3427 %C Dagstuhl, Germany %D 2005 %P 20-35 %T A Hybrid Model of the UMTS Downlink Capacity with WWW Traffic on Dedicated Channels %X One of the main advances of 3G networks like UMTS is the ability to support a large variety of different services. These services are subdivided in two domains, circuit-switched services and packet-switched services. The main application expected for packet-switched services is the browsing of the World Wide Web. The web traffic is usually described by quite sophisticated source traffic models and the packet arrivals on IP layer are determined by TCP. On the other hand, the planning process for UMTS networks relies on analytic methods or Monte Carlo simulations that assume the number of users to be Poisson distributed. The intention of this work is to examine if it is possible to apply the existing planning methods to web traffic. We are able to show that the Poisson assumption holds for the number of web users that simultaneously transmit over the air interface and that the resulting NodeB transmit power distribution is valid. We use the Monte Carlo simulation technique to evaluate the web capacity of an example UMTS network.
• Handover-Strategien zur Verbesserung der Leistungsfähigkeit von Mobilfunknetzen der 4. Generation. Staehle, Dirk. DFG-Kolloquium (AKOM), Karlsruhe, Germany, 2005, February 15.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-193, address = {DFG-Kolloquium (AKOM), Karlsruhe, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {02}, title = {Handover-Strategien zur Verbesserung der Leistungsfähigkeit von Mobilfunknetzen der 4. Generation}, year = 2005 }

  %0 Generic %1 info3-talk-2005-193 %A Staehle, Dirk %C DFG-Kolloquium (AKOM), Karlsruhe, Germany %D 2005 %T Handover-Strategien zur Verbesserung der Leistungsfähigkeit von Mobilfunknetzen der 4. Generation
• An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process. Staehle, Dirk. In IEEE VTC Spring. Stockholm, Sweden, 2005.
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  @inproceedings{info3-inproceedings-2005-187, address = {Stockholm, Sweden}, author = {Staehle, Dirk}, booktitle = {IEEE VTC Spring}, keywords = {sys:hidden:inproceedings}, month = {06}, title = {An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process}, year = 2005 }

  %0 Conference Paper %1 info3-inproceedings-2005-187 %A Staehle, Dirk %B IEEE VTC Spring %C Stockholm, Sweden %D 2005 %T An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process
• An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process. Staehle, Dirk. IEEE VTC Spring, Stockholm, Sweden, 2005, June.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-180, address = {IEEE VTC Spring, Stockholm, Sweden}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {06}, title = {An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process.}, year = 2005 }

  %0 Generic %1 info3-talk-2005-180 %A Staehle, Dirk %C IEEE VTC Spring, Stockholm, Sweden %D 2005 %T An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process.
• Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs. Technical Report (365), . Mäder, Andreas; Staehle, Dirk; Schröder, Bernd. University of Wuerzburg, 2005.
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  @techreport{info3-techreport-2005-183, author = {Mäder, Andreas and Staehle, Dirk and Schröder, Bernd}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {06}, number = 365, title = {Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs}, year = 2005 }

  %0 Report %1 info3-techreport-2005-183 %A Mäder, Andreas %A Staehle, Dirk %A Schröder, Bernd %D 2005 %N 365 %T Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs
• Spatial UMTS Traffic Characterization: The Load Model - Idea, Implementation, Validation. Staehle, Dirk. France Telecom R&D, Belfort, France, 2005, July 8.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-200, address = {France Telecom R&D, Belfort, France}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {07}, title = {Spatial UMTS Traffic Characterization: The Load Model - Idea, Implementation, Validation}, year = 2005 }

  %0 Generic %1 info3-talk-2005-200 %A Staehle, Dirk %C France Telecom R&D, Belfort, France %D 2005 %T Spatial UMTS Traffic Characterization: The Load Model - Idea, Implementation, Validation
• 3G and Beyond: An Introductory Course to Modeling, Planning, and Future Aspects of UMTS Networks. Staehle, Dirk; Necker, Marc; Schröder, Bernd. Beijing, China, 2005, August.
  • [ BibTeX ]
  • [ EndNote ]
  @misc{info3-tutorial-2005-4, address = {Beijing, China}, author = {Staehle, Dirk and Necker, Marc and Schröder, Bernd}, booktitle = {19th International Teletraffic Congress (ITC 19)}, keywords = {sys:hidden:tutorial}, month = {08}, title = {3G and Beyond: An Introductory Course to Modeling, Planning, and Future Aspects of UMTS Networks}, year = 2005 }

  %0 Generic %1 info3-tutorial-2005-4 %A Staehle, Dirk %A Necker, Marc %A Schröder, Bernd %B 19th International Teletraffic Congress (ITC 19) %C Beijing, China %D 2005 %T 3G and Beyond: An Introductory Course to Modeling, Planning, and Future Aspects of UMTS Networks
• Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs. Staehle, Dirk. 19th International Teletraffic Congress (ITC19), Bejing, China, 2005, September.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-182, address = {19th International Teletraffic Congress (ITC19), Bejing, China}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {09}, title = {Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs}, year = 2005 }

  %0 Generic %1 info3-talk-2005-182 %A Staehle, Dirk %C 19th International Teletraffic Congress (ITC19), Bejing, China %D 2005 %T Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs
• On the Fly Estimation of the Peer Population in a Chord-based P2P System. Binzenhöfer, Andreas; Staehle, Dirk; Henjes, Robert. In 19th International Teletraffic Congress (ITC19). Beijing, China, 2005.
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  • [ Download ]
  @inproceedings{info3-inproceedings-2005-193, address = {Beijing, China}, author = {Binzenhöfer, Andreas and Staehle, Dirk and Henjes, Robert}, booktitle = {19th International Teletraffic Congress (ITC19)}, keywords = {p2pinnop}, month = {09}, title = {On the Fly Estimation of the Peer Population in a Chord-based P2P System}, year = 2005 }

  %0 Conference Paper %1 info3-inproceedings-2005-193 %A Binzenhöfer, Andreas %A Staehle, Dirk %A Henjes, Robert %B 19th International Teletraffic Congress (ITC19) %C Beijing, China %D 2005 %T On the Fly Estimation of the Peer Population in a Chord-based P2P System
• On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code. Staehle, Dirk. In IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC). Berlin, Germany, 2005.
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  @inproceedings{info3-inproceedings-2005-201, address = {Berlin, Germany}, author = {Staehle, Dirk}, booktitle = {IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code}, year = 2005 }

  %0 Conference Paper %1 info3-inproceedings-2005-201 %A Staehle, Dirk %B IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC) %C Berlin, Germany %D 2005 %T On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code
• Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs. Mäder, Andreas; Staehle, Dirk; Schröder, Bernd. In 19th International Teletraffic Congress (ITC19). Bejing, China, 2005.
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  @inproceedings{info3-inproceedings-2005-196, address = {Bejing, China}, author = {Mäder, Andreas and Staehle, Dirk and Schröder, Bernd}, booktitle = {19th International Teletraffic Congress (ITC19)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs}, year = 2005 }

  %0 Conference Paper %1 info3-inproceedings-2005-196 %A Mäder, Andreas %A Staehle, Dirk %A Schröder, Bernd %B 19th International Teletraffic Congress (ITC19) %C Bejing, China %D 2005 %T Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs
• On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code. Staehle, Dirk. IEEE PIMRC, Berlin, Germany, 2005, September.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-181, address = {IEEE PIMRC, Berlin, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {09}, title = {On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code}, year = 2005 }

  %0 Generic %1 info3-talk-2005-181 %A Staehle, Dirk %C IEEE PIMRC, Berlin, Germany %D 2005 %T On the Code and Soft Capacity of the UMTS FDD Downlink and the Capacity Increase by using a Secondary Scrambling Code
• Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs. Staehle, Dirk. University of Osaka, Osaka, Japan, 2005, September 5.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-192, address = {University of Osaka, Osaka, Japan}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {09}, title = {Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs.}, year = 2005 }

  %0 Generic %1 info3-talk-2005-192 %A Staehle, Dirk %C University of Osaka, Osaka, Japan %D 2005 %T Dimensioning of Hardware Components in UMTS Networks with Sectorized NodeBs.
• On the Stability of Chord-based P2P Systems. Binzenhöfer, Andreas; Staehle, Dirk; Henjes, Robert. In GLOBECOM 2005, p. 5. St. Louis, MO, USA, 2005.
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  @inproceedings{info3-inproceedings-2005-198, address = {St. Louis, MO, USA}, author = {Binzenhöfer, Andreas and Staehle, Dirk and Henjes, Robert}, booktitle = {GLOBECOM 2005}, keywords = {p2pinnop}, month = 11, pages = 5, title = {On the Stability of Chord-based P2P Systems}, year = 2005 }

  %0 Conference Paper %1 info3-inproceedings-2005-198 %A Binzenhöfer, Andreas %A Staehle, Dirk %A Henjes, Robert %B GLOBECOM 2005 %C St. Louis, MO, USA %D 2005 %P 5 %T On the Stability of Chord-based P2P Systems
• Analytic Methods for UMTS Radio Network Planning. Staehle, Dirk. Telekommunikationsforum, Vienna, Austia, 2005, December 2.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-191, address = {Telekommunikationsforum, Vienna, Austia}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 12, title = {Analytic Methods for UMTS Radio Network Planning}, year = 2005 }

  %0 Generic %1 info3-talk-2005-191 %A Staehle, Dirk %C Telekommunikationsforum, Vienna, Austia %D 2005 %T Analytic Methods for UMTS Radio Network Planning
• On the Optimal Number of Transmission Opportunities for Bandwidth Requests in WiMAX Networks. Staehle, Dirk. Euro-NGI Workshop on QoS and Traffic Control, Paris, France, 2005, December 9.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2005-184, address = {Euro-NGI Workshop on QoS and Traffic Control, Paris, France}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 12, title = {On the Optimal Number of Transmission Opportunities for Bandwidth Requests in WiMAX Networks}, year = 2005 }

  %0 Generic %1 info3-talk-2005-184 %A Staehle, Dirk %C Euro-NGI Workshop on QoS and Traffic Control, Paris, France %D 2005 %T On the Optimal Number of Transmission Opportunities for Bandwidth Requests in WiMAX Networks

• T-Mobile UMTS. Leibnitz, Kenji; Staehle, Dirk; Heck, Klaus; Mäder, Andreas. 2004.
  • [ BibTeX ]
  • [ EndNote ]
  @misc{info3-poster-2004-4, author = {Leibnitz, Kenji and Staehle, Dirk and Heck, Klaus and Mäder, Andreas}, booktitle = {T-Mobile}, keywords = {sys:hidden:poster}, title = {T-Mobile UMTS}, year = 2004 }

  %0 Generic %1 info3-poster-2004-4 %A Leibnitz, Kenji %A Staehle, Dirk %A Heck, Klaus %A Mäder, Andreas %B T-Mobile %D 2004 %T T-Mobile UMTS
• An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks. Technical Report (316), . Staehle, Dirk; Mäder, Andreas. University of Wuerzburg, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  @techreport{info3-techreport-2004-236, author = {Staehle, Dirk and Mäder, Andreas}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {02}, number = 316, title = {An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks}, year = 2004 }

  %0 Report %1 info3-techreport-2004-236 %A Staehle, Dirk %A Mäder, Andreas %D 2004 %N 316 %T An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks
• An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks. Staehle, Dirk. Milano, Italy, 2004, May 17.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2004-4, address = {Milano, Italy}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {05}, title = {An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks}, year = 2004 }

  %0 Generic %1 info3-talk-2004-4 %A Staehle, Dirk %C Milano, Italy %D 2004 %T An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks
• Analytic Modelling of the WCDMA Downlink Capacity in Multi-Service Environments. Technical Report (330), . Mäder, Andreas; Staehle, Dirk. University of Wuerzburg, 2004.
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  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2004-157, author = {Mäder, Andreas and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, number = 330, title = {Analytic Modelling of the WCDMA Downlink Capacity in Multi-Service Environments}, year = 2004 }

  %0 Report %1 info3-techreport-2004-157 %A Mäder, Andreas %A Staehle, Dirk %D 2004 %N 330 %T Analytic Modelling of the WCDMA Downlink Capacity in Multi-Service Environments
• An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks. Staehle, Dirk; Mäder, Andreas. In IEEE VTC Spring. Milano, Italy, 2004.
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  • [ EndNote ]
  • [ Download ]
  @inproceedings{info3-inproceedings-2004-136, address = {Milano, Italy}, author = {Staehle, Dirk and Mäder, Andreas}, booktitle = {IEEE VTC Spring}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks}, year = 2004 }

  %0 Conference Paper %1 info3-inproceedings-2004-136 %A Staehle, Dirk %A Mäder, Andreas %B IEEE VTC Spring %C Milano, Italy %D 2004 %T An Analytic Model for Deriving the Node-B Transmit Power in Heterogeneous UMTS Networks
• Uplink Blocking Probabilities in Heterogenous WCDMA Networks considering Other-Cell Interference. Technical Report (333), . Mäder, Andreas; Staehle, Dirk. University of Wuerzburg, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2004-158, author = {Mäder, Andreas and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {05}, number = 333, title = {Uplink Blocking Probabilities in Heterogenous WCDMA Networks considering Other-Cell Interference}, year = 2004 }

  %0 Report %1 info3-techreport-2004-158 %A Mäder, Andreas %A Staehle, Dirk %D 2004 %N 333 %T Uplink Blocking Probabilities in Heterogenous WCDMA Networks considering Other-Cell Interference
• Analytic Methods for UMTS Radio Network Planning. Technical Report (PhD dissertation), . Staehle, Dirk. PhD dissertation. University of Wuerzburg, 2004, November.
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  @phdthesis{info3-dissertation-2004-16, author = {Staehle, Dirk}, keywords = {sys:hidden:supervisor:phuoc.tran-gia}, month = 11, school = {University of Wuerzburg}, title = {Analytic Methods for UMTS Radio Network Planning}, year = 2004 }

  %0 Thesis %1 info3-dissertation-2004-16 %A Staehle, Dirk %D 2004 %T Analytic Methods for UMTS Radio Network Planning
• Analytic Modelling of the WCDMA Downlink Capacity in Multi-Service Environments. Mäder, Andreas; Staehle, Dirk. In 16th ITC Specialist Seminar, pp. 229–238. Antwerp, Belgium, 2004.
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  • [ EndNote ]
  • [ Download ]
  @inproceedings{info3-inproceedings-2004-152, address = {Antwerp, Belgium}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {16th ITC Specialist Seminar}, keywords = {sys:hidden:inproceedings}, month = {08}, pages = {229–238}, title = {Analytic Modelling of the WCDMA Downlink Capacity in Multi-Service Environments}, year = 2004 }

  %0 Conference Paper %1 info3-inproceedings-2004-152 %A Mäder, Andreas %A Staehle, Dirk %B 16th ITC Specialist Seminar %C Antwerp, Belgium %D 2004 %P 229--238 %T Analytic Modelling of the WCDMA Downlink Capacity in Multi-Service Environments
• Uplink Blocking Probabilities in Heterogeneous WCDMA Networks considering Other-Cell Interference. Mäder, Andreas; Staehle, Dirk. In Southern African Telecommunication Networks & Applications Conference. South Western Cape, South Africa, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  @inproceedings{info3-inproceedings-2004-153, address = {South Western Cape, South Africa}, author = {Mäder, Andreas and Staehle, Dirk}, booktitle = {Southern African Telecommunication Networks & Applications Conference}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Uplink Blocking Probabilities in Heterogeneous WCDMA Networks considering Other-Cell Interference}, year = 2004 }

  %0 Conference Paper %1 info3-inproceedings-2004-153 %A Mäder, Andreas %A Staehle, Dirk %B Southern African Telecommunication Networks & Applications Conference %C South Western Cape, South Africa %D 2004 %T Uplink Blocking Probabilities in Heterogeneous WCDMA Networks considering Other-Cell Interference
• An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process. Technical Report (342), . Staehle, Dirk. University of Wuerzburg, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  @techreport{info3-techreport-2004-237, author = {Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 10, number = 342, title = {An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process}, year = 2004 }

  %0 Report %1 info3-techreport-2004-237 %A Staehle, Dirk %D 2004 %N 342 %T An Analytic Method for Coverage Prediction in the UMTS Radio Network Planning Process
• An Analytic Model for the Downlink Capacity of a UMTS Network. Staehle, Dirk. 1st COST 290 Management Committee Meeting, Gozo, Malta, 2004, October 8.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2004-188, address = {1st COST 290 Management Committee Meeting, Gozo, Malta}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {An Analytic Model for the Downlink Capacity of a UMTS Network}, year = 2004 }

  %0 Generic %1 info3-talk-2004-188 %A Staehle, Dirk %C 1st COST 290 Management Committee Meeting, Gozo, Malta %D 2004 %T An Analytic Model for the Downlink Capacity of a UMTS Network
• Estimating the Size of a Chord Ring. Technical Report (348), . Binzenhöfer, Andreas; Staehle, Dirk; Henjes, Robert. University of Wuerzburg, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2004-169, author = {Binzenhöfer, Andreas and Staehle, Dirk and Henjes, Robert}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 11, number = 348, title = {Estimating the Size of a Chord Ring}, year = 2004 }

  %0 Report %1 info3-techreport-2004-169 %A Binzenhöfer, Andreas %A Staehle, Dirk %A Henjes, Robert %D 2004 %N 348 %T Estimating the Size of a Chord Ring
• On the Stability of Chord-based P2P Systems. Technical Report (347), . Binzenhöfer, Andreas; Staehle, Dirk; Henjes, Robert. University of Wuerzburg, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2004-167, author = {Binzenhöfer, Andreas and Staehle, Dirk and Henjes, Robert}, institution = {University of Wuerzburg}, keywords = {p2pinnop}, month = 11, number = 347, title = {On the Stability of Chord-based P2P Systems}, year = 2004 }

  %0 Report %1 info3-techreport-2004-167 %A Binzenhöfer, Andreas %A Staehle, Dirk %A Henjes, Robert %D 2004 %N 347 %T On the Stability of Chord-based P2P Systems
• A Semi-Analytic Model of the UMTS Downlink Capacity with WWW Traffic on Dedicated Channels. Technical Report (340), . Hoßfeld, Tobias; Staehle, Dirk. University of Wuerzburg, 2004.
  • [ BibTeX ]
  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2004-162, author = {Hoßfeld, Tobias and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {09}, number = 340, title = {A Semi-Analytic Model of the UMTS Downlink Capacity with WWW Traffic on Dedicated Channels}, year = 2004 }

  %0 Report %1 info3-techreport-2004-162 %A Hoßfeld, Tobias %A Staehle, Dirk %D 2004 %N 340 %T A Semi-Analytic Model of the UMTS Downlink Capacity with WWW Traffic on Dedicated Channels

• Macro Diversity Gain in UMTS Networks with Clustered User Distributions. Staehle, Dirk; Heck, Klaus; Leibnitz, Kenji. In International Teletraffic Congress (ITC-18). Berlin, Germany, 2003.
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  @inproceedings{info3-inproceedings-2003-57, address = {Berlin, Germany}, author = {Staehle, Dirk and Heck, Klaus and Leibnitz, Kenji}, booktitle = {International Teletraffic Congress (ITC-18)}, keywords = {sys:hidden:inproceedings}, month = {08}, title = {Macro Diversity Gain in UMTS Networks with Clustered User Distributions}, year = 2003 }

  %0 Conference Paper %1 info3-inproceedings-2003-57 %A Staehle, Dirk %A Heck, Klaus %A Leibnitz, Kenji %B International Teletraffic Congress (ITC-18) %C Berlin, Germany %D 2003 %T Macro Diversity Gain in UMTS Networks with Clustered User Distributions
• An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic. Technical Report (310), . Mäder, Andreas; Staehle, Dirk. University of Wuerzburg, 2003.
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  @techreport{info3-techreport-2003-57, author = {Mäder, Andreas and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, number = 310, title = {An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic}, year = 2003 }

  %0 Report %1 info3-techreport-2003-57 %A Mäder, Andreas %A Staehle, Dirk %D 2003 %N 310 %T An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic
• Analytic Approximation of the Effective Bandwidth for Best-Effort Services in UMTS Networks. Leibnitz, Kenji; Staehle, Dirk; Tran-Gia, Phuoc; Heck, Klaus; Schröder, Bernd; Weller, Albert. In Proc. of IEEE Vehicular Technology Conference (VTC-03 Spring). Jeju, South Korea, 2003.
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  @inproceedings{info3-inproceedings-2003-58, address = {Jeju, South Korea}, author = {Leibnitz, Kenji and Staehle, Dirk and Tran-Gia, Phuoc and Heck, Klaus and Schröder, Bernd and Weller, Albert}, booktitle = {Proc. of IEEE Vehicular Technology Conference (VTC-03 Spring)}, keywords = {sys:hidden:inproceedings}, month = {04}, title = {Analytic Approximation of the Effective Bandwidth for Best-Effort Services in UMTS Networks}, year = 2003 }

  %0 Conference Paper %1 info3-inproceedings-2003-58 %A Leibnitz, Kenji %A Staehle, Dirk %A Tran-Gia, Phuoc %A Heck, Klaus %A Schröder, Bernd %A Weller, Albert %B Proc. of IEEE Vehicular Technology Conference (VTC-03 Spring) %C Jeju, South Korea %D 2003 %T Analytic Approximation of the Effective Bandwidth for Best-Effort Services in UMTS Networks
• Analytic Approximation of the Effective Bandwidth for Best-Effort Services in UMTS Networks. Staehle, Dirk. IEEE VTC Spring, Jeju, South Corea, 2003, April.
  • [ BibTeX ]
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  @presentation{info3-talk-2003-78, address = {IEEE VTC Spring, Jeju, South Corea}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {04}, title = {Analytic Approximation of the Effective Bandwidth for Best-Effort Services in UMTS Networks}, year = 2003 }

  %0 Generic %1 info3-talk-2003-78 %A Staehle, Dirk %C IEEE VTC Spring, Jeju, South Corea %D 2003 %T Analytic Approximation of the Effective Bandwidth for Best-Effort Services in UMTS Networks
• An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic. Staehle, Dirk. 18th International Teletraffic Congress (ITC18), Berlin, Germany, 2003, September.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2003-79, address = {18th International Teletraffic Congress (ITC18), Berlin, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = {09}, title = {An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic}, year = 2003 }

  %0 Generic %1 info3-talk-2003-79 %A Staehle, Dirk %C 18th International Teletraffic Congress (ITC18), Berlin, Germany %D 2003 %T An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic
• An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic. Staehle, Dirk; Mäder, Andreas. In 18th International Teletraffic Congress (ITC18). Berlin, 2003.
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  @inproceedings{info3-inproceedings-2003-71, address = {Berlin}, author = {Staehle, Dirk and Mäder, Andreas}, booktitle = {18th International Teletraffic Congress (ITC18)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic}, year = 2003 }

  %0 Conference Paper %1 info3-inproceedings-2003-71 %A Staehle, Dirk %A Mäder, Andreas %B 18th International Teletraffic Congress (ITC18) %C Berlin %D 2003 %T An Analytic Approximation of the Uplink Capacity in a UMTS Network with Heterogeneous Traffic
• Source Traffic Modeling of Wireless Applications. Staehle, Dirk. France Telecom R&D, Belfort, France, 2003, October.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2003-77, address = {France Telecom R&D, Belfort, France}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Source Traffic Modeling of Wireless Applications}, year = 2003 }

  %0 Generic %1 info3-talk-2003-77 %A Staehle, Dirk %C France Telecom R&D, Belfort, France %D 2003 %T Source Traffic Modeling of Wireless Applications
• Analytic Models for Coverage and Capacity of UMTS. Staehle, Dirk. Telkom, Pretoria, South Africa, 2003, October.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2003-75, address = {Telkom, Pretoria, South Africa}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Analytic Models for Coverage and Capacity of UMTS}, year = 2003 }

  %0 Generic %1 info3-talk-2003-75 %A Staehle, Dirk %C Telkom, Pretoria, South Africa %D 2003 %T Analytic Models for Coverage and Capacity of UMTS
• Simulative Untersuchung des Sendeleistungsregelungsfehlers: Modellbildung und Ergebnisse. Staehle, Dirk. T-Mobile International, Bonn, Germany, 2003, October.
  • [ BibTeX ]
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  @presentation{info3-talk-2003-74, address = {T-Mobile International, Bonn, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Simulative Untersuchung des Sendeleistungsregelungsfehlers: Modellbildung und Ergebnisse}, year = 2003 }

  %0 Generic %1 info3-talk-2003-74 %A Staehle, Dirk %C T-Mobile International, Bonn, Germany %D 2003 %T Simulative Untersuchung des Sendeleistungsregelungsfehlers: Modellbildung und Ergebnisse
• Customer Traffic Modelling in Wireless. Staehle, Dirk. Telkom, Pretoria, South Africa, 2003, October.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2003-76, address = {Telkom, Pretoria, South Africa}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Customer Traffic Modelling in Wireless}, year = 2003 }

  %0 Generic %1 info3-talk-2003-76 %A Staehle, Dirk %C Telkom, Pretoria, South Africa %D 2003 %T Customer Traffic Modelling in Wireless

• Diversity Effects on the Soft Handover Gain in UMTS networks. Staehle, Dirk; Leibnitz, Kenji; Heck, Klaus. In Proc. of IEEE Vehicular Technology Conference (VTC-02 Fall). Vancouver, Canada, 2002.
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  @inproceedings{info3-inproceedings-2002-45, address = {Vancouver, Canada}, author = {Staehle, Dirk and Leibnitz, Kenji and Heck, Klaus}, booktitle = {Proc. of IEEE Vehicular Technology Conference (VTC-02 Fall)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Diversity Effects on the Soft Handover Gain in UMTS networks}, year = 2002 }

  %0 Conference Paper %1 info3-inproceedings-2002-45 %A Staehle, Dirk %A Leibnitz, Kenji %A Heck, Klaus %B Proc. of IEEE Vehicular Technology Conference (VTC-02 Fall) %C Vancouver, Canada %D 2002 %T Diversity Effects on the Soft Handover Gain in UMTS networks
• An Approximation of Othercell Interference Distributions for UMTS Systems using Fixed-Point Equations. Technical Report (292), . Weller, Albert; Leibnitz, Kenji; Heck, Klaus; Tran-Gia, Phuoc; Schröder, Bernd; Staehle, Dirk. University of Wuerzburg, 2002.
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  @techreport{info3-techreport-2002-46, author = {Weller, Albert and Leibnitz, Kenji and Heck, Klaus and Tran-Gia, Phuoc and Schröder, Bernd and Staehle, Dirk}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {01}, number = 292, title = {An Approximation of Othercell Interference Distributions for UMTS Systems using Fixed-Point Equations}, year = 2002 }

  %0 Report %1 info3-techreport-2002-46 %A Weller, Albert %A Leibnitz, Kenji %A Heck, Klaus %A Tran-Gia, Phuoc %A Schröder, Bernd %A Staehle, Dirk %D 2002 %N 292 %T An Approximation of Othercell Interference Distributions for UMTS Systems using Fixed-Point Equations
• Decomposition of Large IP Networks for Routing Optimization. Technical Report (293), . Staehle, Dirk; Köhler, Stefan; Milbrandt, Jens; Berry, Les. University of Wuerzburg, 2002.
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  @techreport{info3-techreport-2002-58, author = {Staehle, Dirk and Köhler, Stefan and Milbrandt, Jens and Berry, Les}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {02}, number = 293, title = {Decomposition of Large IP Networks for Routing Optimization}, year = 2002 }

  %0 Report %1 info3-techreport-2002-58 %A Staehle, Dirk %A Köhler, Stefan %A Milbrandt, Jens %A Berry, Les %D 2002 %N 293 %T Decomposition of Large IP Networks for Routing Optimization
• Diversity Effects on the Soft Handover Gain in UMTS networks. Technical Report (295), . Leibnitz, Kenji; Staehle, Dirk; Heck, Klaus. University of Wuerzburg, 2002.
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  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2002-47, author = {Leibnitz, Kenji and Staehle, Dirk and Heck, Klaus}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {04}, number = 295, title = {Diversity Effects on the Soft Handover Gain in UMTS networks}, year = 2002 }

  %0 Report %1 info3-techreport-2002-47 %A Leibnitz, Kenji %A Staehle, Dirk %A Heck, Klaus %D 2002 %N 295 %T Diversity Effects on the Soft Handover Gain in UMTS networks
• Approximating the Othercell Interference Distribution in Inhomogeneous UMTS Networks. Weller, Albert; Heck, Klaus; Schröder, Bernd; Staehle, Dirk; Tran-Gia, Phuoc; Leibnitz, Kenji. In Proc. of the IEEE Vehicular Technology Conference (VTC-02 Spring). Birmingham, AL, 2002.
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  @inproceedings{info3-inproceedings-2002-43, address = {Birmingham, AL}, author = {Weller, Albert and Heck, Klaus and Schröder, Bernd and Staehle, Dirk and Tran-Gia, Phuoc and Leibnitz, Kenji}, booktitle = {Proc. of the IEEE Vehicular Technology Conference (VTC-02 Spring)}, keywords = {sys:hidden:inproceedings}, month = {05}, title = {Approximating the Othercell Interference Distribution in Inhomogeneous UMTS Networks}, year = 2002 }

  %0 Conference Paper %1 info3-inproceedings-2002-43 %A Weller, Albert %A Heck, Klaus %A Schröder, Bernd %A Staehle, Dirk %A Tran-Gia, Phuoc %A Leibnitz, Kenji %B Proc. of the IEEE Vehicular Technology Conference (VTC-02 Spring) %C Birmingham, AL %D 2002 %T Approximating the Othercell Interference Distribution in Inhomogeneous UMTS Networks
• Routing-based IP Network Optimisation. Staehle, Dirk; Köhler, Stefan; Kohlhaas, Ute. In 15th International Teletraffic Congress Specialists Seminar. Würzburg, 2002.
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  @inproceedings{info3-inproceedings-2002-72, address = {Würzburg}, author = {Staehle, Dirk and Köhler, Stefan and Kohlhaas, Ute}, booktitle = {15th International Teletraffic Congress Specialists Seminar}, keywords = {sys:hidden:inproceedings}, month = {07}, title = {Routing-based IP Network Optimisation}, year = 2002 }

  %0 Conference Paper %1 info3-inproceedings-2002-72 %A Staehle, Dirk %A Köhler, Stefan %A Kohlhaas, Ute %B 15th International Teletraffic Congress Specialists Seminar %C Würzburg %D 2002 %T Routing-based IP Network Optimisation
• Analytische Leistungsuntersuchung der Bitratenanpassung von Best-Effort Nutzern in UMTS. Staehle, Dirk. T-Mobile International, Bonn, Germany, 2002, October 28.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2002-70, address = {T-Mobile International, Bonn, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Analytische Leistungsuntersuchung der Bitratenanpassung von Best-Effort Nutzern in UMTS}, year = 2002 }

  %0 Generic %1 info3-talk-2002-70 %A Staehle, Dirk %C T-Mobile International, Bonn, Germany %D 2002 %T Analytische Leistungsuntersuchung der Bitratenanpassung von Best-Effort Nutzern in UMTS
• Effects of Soft Handover on the UMTS Downlink Performance. Staehle, Dirk; Leibnitz, Kenji; Heck, Klaus. In Proc. of IEEE Vehicular Technology Conference (VTC-02 Fall). Vancouver, Canada, 2002.
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  @inproceedings{info3-inproceedings-2002-44, address = {Vancouver, Canada}, author = {Staehle, Dirk and Leibnitz, Kenji and Heck, Klaus}, booktitle = {Proc. of IEEE Vehicular Technology Conference (VTC-02 Fall)}, keywords = {sys:hidden:inproceedings}, month = {09}, title = {Effects of Soft Handover on the UMTS Downlink Performance}, year = 2002 }

  %0 Conference Paper %1 info3-inproceedings-2002-44 %A Staehle, Dirk %A Leibnitz, Kenji %A Heck, Klaus %B Proc. of IEEE Vehicular Technology Conference (VTC-02 Fall) %C Vancouver, Canada %D 2002 %T Effects of Soft Handover on the UMTS Downlink Performance
• Effects of Soft Handover on the UMTS Downlink Performance. Staehle, Dirk. IEEE VTC Fall, Vancouver, Canada, 2002, October.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2002-73, address = {IEEE VTC Fall, Vancouver, Canada}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Effects of Soft Handover on the UMTS Downlink Performance}, year = 2002 }

  %0 Generic %1 info3-talk-2002-73 %A Staehle, Dirk %C IEEE VTC Fall, Vancouver, Canada %D 2002 %T Effects of Soft Handover on the UMTS Downlink Performance
• Dimensioning of Hardware Components for the UMTS air interface. Staehle, Dirk. T-Mobile International, Bonn, Germany, 2002, October 22.
  • [ BibTeX ]
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  @presentation{info3-talk-2002-68, address = {T-Mobile International, Bonn, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Dimensioning of Hardware Components for the UMTS air interface}, year = 2002 }

  %0 Generic %1 info3-talk-2002-68 %A Staehle, Dirk %C T-Mobile International, Bonn, Germany %D 2002 %T Dimensioning of Hardware Components for the UMTS air interface
• Modellierung und Simulationsergebnisse zum UMTS Packet-Scheduler. Staehle, Dirk. T-Mobile Internatinal, Bonn, Germany, 2002, October 28.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2002-69, address = {T-Mobile Internatinal, Bonn, Germany}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 10, title = {Modellierung und Simulationsergebnisse zum UMTS Packet-Scheduler}, year = 2002 }

  %0 Generic %1 info3-talk-2002-69 %A Staehle, Dirk %C T-Mobile Internatinal, Bonn, Germany %D 2002 %T Modellierung und Simulationsergebnisse zum UMTS Packet-Scheduler
• Fast Prediction of the Coverage Area in UMTS Networks. Staehle, Dirk. IEEE Globecom, Taipeh, Taiwan, 2002, November.
  • [ BibTeX ]
  • [ EndNote ]
  @presentation{info3-talk-2002-72, address = {IEEE Globecom, Taipeh, Taiwan}, author = {Staehle, Dirk}, keywords = {sys:hidden:presentation}, month = 11, title = {Fast Prediction of the Coverage Area in UMTS Networks}, year = 2002 }

  %0 Generic %1 info3-talk-2002-72 %A Staehle, Dirk %C IEEE Globecom, Taipeh, Taiwan %D 2002 %T Fast Prediction of the Coverage Area in UMTS Networks
• Fast Prediction of the Coverage Area in UMTS Networks. Leibnitz, Kenji; Heck, Klaus; Staehle, Dirk. In Proc. of IEEE GLOBECOM. Taipei, Taiwan, 2002.
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  • [ Download ]
  @inproceedings{info3-inproceedings-2002-46, address = {Taipei, Taiwan}, author = {Leibnitz, Kenji and Heck, Klaus and Staehle, Dirk}, booktitle = {Proc. of IEEE GLOBECOM}, keywords = {sys:hidden:inproceedings}, month = 11, title = {Fast Prediction of the Coverage Area in UMTS Networks}, year = 2002 }

  %0 Conference Paper %1 info3-inproceedings-2002-46 %A Leibnitz, Kenji %A Heck, Klaus %A Staehle, Dirk %B Proc. of IEEE GLOBECOM %C Taipei, Taiwan %D 2002 %T Fast Prediction of the Coverage Area in UMTS Networks

• An analytical approach for determining coverage probabilities in large UMTS networks. Tran-Gia, Phuoc; Leibnitz, Kenji; Staehle, Dirk; Schröder, Bernd; Liesenfeld, Bernhard; Weller, Albert. In Proc. of the IEEE Vehicular Technology Conference (VTC-01 Fall). Atlantic City, NJ, 2001.
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  @inproceedings{info3-inproceedings-2001-42, address = {Atlantic City, NJ}, author = {Tran-Gia, Phuoc and Leibnitz, Kenji and Staehle, Dirk and Schröder, Bernd and Liesenfeld, Bernhard and Weller, Albert}, booktitle = {Proc. of the IEEE Vehicular Technology Conference (VTC-01 Fall)}, keywords = {sys:hidden:inproceedings}, month = 10, title = {An analytical approach for determining coverage probabilities in large UMTS networks}, year = 2001 }

  %0 Conference Paper %1 info3-inproceedings-2001-42 %A Tran-Gia, Phuoc %A Leibnitz, Kenji %A Staehle, Dirk %A Schröder, Bernd %A Liesenfeld, Bernhard %A Weller, Albert %B Proc. of the IEEE Vehicular Technology Conference (VTC-01 Fall) %C Atlantic City, NJ %D 2001 %T An analytical approach for determining coverage probabilities in large UMTS networks
• Analytical Characterization of the Soft Handover Gain in UMTS. Tran-Gia, Phuoc; Staehle, Dirk; Heck, Klaus; Schröder, Bernd; Leibnitz, Kenji; Weller, Albert. In Proc. of the IEEE Vehicular Technology Conference (VTC-01 Fall). Atlantic City, NJ, 2001.
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  • [ EndNote ]
  • [ Download ]
  @inproceedings{info3-inproceedings-2001-41, address = {Atlantic City, NJ}, author = {Tran-Gia, Phuoc and Staehle, Dirk and Heck, Klaus and Schröder, Bernd and Leibnitz, Kenji and Weller, Albert}, booktitle = {Proc. of the IEEE Vehicular Technology Conference (VTC-01 Fall)}, keywords = {sys:hidden:inproceedings}, month = 10, title = {Analytical Characterization of the Soft Handover Gain in UMTS}, year = 2001 }

  %0 Conference Paper %1 info3-inproceedings-2001-41 %A Tran-Gia, Phuoc %A Staehle, Dirk %A Heck, Klaus %A Schröder, Bernd %A Leibnitz, Kenji %A Weller, Albert %B Proc. of the IEEE Vehicular Technology Conference (VTC-01 Fall) %C Atlantic City, NJ %D 2001 %T Analytical Characterization of the Soft Handover Gain in UMTS
• QoS of Internet Access with GPRS. Technical Report (283), . Leibnitz, Kenji; Staehle, Dirk; Tsipotis, Konstantin. University of Wuerzburg, 2001.
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  • [ Download ]
  @techreport{info3-techreport-2001-44, author = {Leibnitz, Kenji and Staehle, Dirk and Tsipotis, Konstantin}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 10, number = 283, title = {QoS of Internet Access with GPRS}, year = 2001 }

  %0 Report %1 info3-techreport-2001-44 %A Leibnitz, Kenji %A Staehle, Dirk %A Tsipotis, Konstantin %D 2001 %N 283 %T QoS of Internet Access with GPRS
• Analytical Characterization of the Soft Handover Gain in UMTS. Technical Report (284), . Tran-Gia, Phuoc; Leibnitz, Kenji; Heck, Klaus; Staehle, Dirk; Schröder, Bernd; Weller, Albert. University of Wuerzburg, 2001.
  • [ BibTeX ]
  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2001-45, author = {Tran-Gia, Phuoc and Leibnitz, Kenji and Heck, Klaus and Staehle, Dirk and Schröder, Bernd and Weller, Albert}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = 10, number = 284, title = {Analytical Characterization of the Soft Handover Gain in UMTS}, year = 2001 }

  %0 Report %1 info3-techreport-2001-45 %A Tran-Gia, Phuoc %A Leibnitz, Kenji %A Heck, Klaus %A Staehle, Dirk %A Schröder, Bernd %A Weller, Albert %D 2001 %N 284 %T Analytical Characterization of the Soft Handover Gain in UMTS
• QoS of Internet Access with GPRS. Tsipotis, Konstantin; Leibnitz, Kenji; Staehle, Dirk. In ACM International Workshop on Modeling Analysis and Simulation of Wireless and Mobile systems (MSWiM 2001). Rome, 2001.
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  @inproceedings{info3-inproceedings-2001-39, address = {Rome}, author = {Tsipotis, Konstantin and Leibnitz, Kenji and Staehle, Dirk}, booktitle = {ACM International Workshop on Modeling Analysis and Simulation of Wireless and Mobile systems (MSWiM 2001)}, keywords = {sys:hidden:inproceedings}, month = {07}, title = {QoS of Internet Access with GPRS}, year = 2001 }

  %0 Conference Paper %1 info3-inproceedings-2001-39 %A Tsipotis, Konstantin %A Leibnitz, Kenji %A Staehle, Dirk %B ACM International Workshop on Modeling Analysis and Simulation of Wireless and Mobile systems (MSWiM 2001) %C Rome %D 2001 %T QoS of Internet Access with GPRS

• Fast heuristics for optimal routing in large IP networks. Technical Report (262), . Berry, Les; Tran-Gia, Phuoc; Staehle, Dirk; Köhler, Stefan. University of Wuerzburg, 2000.
  • [ BibTeX ]
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  • [ Download ]
  @techreport{info3-techreport-2000-230, author = {Berry, Les and Tran-Gia, Phuoc and Staehle, Dirk and Köhler, Stefan}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {07}, number = 262, title = {Fast heuristics for optimal routing in large IP networks}, year = 2000 }

  %0 Report %1 info3-techreport-2000-230 %A Berry, Les %A Tran-Gia, Phuoc %A Staehle, Dirk %A Köhler, Stefan %D 2000 %N 262 %T Fast heuristics for optimal routing in large IP networks
• Source Traffic Modeling of Wireless Applications. Technical Report (261), . Staehle, Dirk; Tran-Gia, Phuoc; Leibnitz, Kenji. University of Wuerzburg, 2000.
  • [ BibTeX ]
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  • [ Download ]
  @techreport{info3-techreport-2000-2, author = {Staehle, Dirk and Tran-Gia, Phuoc and Leibnitz, Kenji}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {06}, number = 261, title = {Source Traffic Modeling of Wireless Applications}, year = 2000 }

  %0 Report %1 info3-techreport-2000-2 %A Staehle, Dirk %A Tran-Gia, Phuoc %A Leibnitz, Kenji %D 2000 %N 261 %T Source Traffic Modeling of Wireless Applications
• Towards an optimization of the routing parameters for IP networks. Technical Report (258), . Staehle, Dirk; Kohlhaas, Ute; Köhler, Stefan. University of Wuerzburg, 2000.
  • [ BibTeX ]
  • [ EndNote ]
  • [ Download ]
  @techreport{info3-techreport-2000-4, author = {Staehle, Dirk and Kohlhaas, Ute and Köhler, Stefan}, institution = {University of Wuerzburg}, keywords = {sys:hidden:techreport}, month = {05}, number = 258, title = {Towards an optimization of the routing parameters for IP networks}, year = 2000 }

  %0 Report %1 info3-techreport-2000-4 %A Staehle, Dirk %A Kohlhaas, Ute %A Köhler, Stefan %D 2000 %N 258 %T Towards an optimization of the routing parameters for IP networks