Siemens Mopi (funded by Siemens AG)

Time-Discrete Analysis of the Crawling Strategy in an Optimized Mobile P2P Architecture Hoßfeld, Tobias; Mäder, Andreas; Tutschku, Kurt; Andersen, Frank-Uwe in EuroNGI Workshop on (2006).

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Mobile networks differ from their wireline counterparts mainly by the high costs for air transmissions and by the mobility of the users. A new entity, denoted as the crawling peer, is suggested in order to optimize the resource mediation mechanism for a mobile P2P file sharing application. In [1], we have investigated the performance of a crawling peer by means of simulations. Now, we show a time-discrete analysis of the crawling peer’s performance in order to investigate different scenarios and to enable parameter-sensitivity studies for further improvements of the crawling peer’s strategy.

@inproceedings{info3-inproceedings-2006-210,
  abstract = {Mobile networks differ from their wireline counterparts mainly by the high costs for air transmissions and by the mobility of the users. A new entity, denoted as the crawling peer, is suggested in order to optimize the resource mediation mechanism for a mobile P2P file sharing application. In [1], we have investigated the performance of a crawling peer by means of simulations. Now, we show a time-discrete analysis of the crawling peer’s performance in order to investigate different scenarios and to enable parameter-sensitivity studies for further improvements of the crawling peer’s strategy.},
  address = {Loveno di Menaggio, Como, Italy},
  author = {Hoßfeld, Tobias and Mäder, Andreas and Tutschku, Kurt and Andersen, Frank-Uwe},
  booktitle = {EuroNGI Workshop on},
  keywords = {mobileptp},
  title = {Time-Discrete Analysis of the Crawling Strategy in an Optimized Mobile P2P Architecture},
  year = 2006
}

%0 Conference Paper
%1 info3-inproceedings-2006-210
%A Hoßfeld, Tobias
%A Mäder, Andreas
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%B EuroNGI Workshop on
%C Loveno di Menaggio, Como, Italy
%D 2006
%T Time-Discrete Analysis of the Crawling Strategy in an Optimized Mobile P2P Architecture
%X Mobile networks differ from their wireline counterparts mainly by the high costs for air transmissions and by the mobility of the users. A new entity, denoted as the crawling peer, is suggested in order to optimize the resource mediation mechanism for a mobile P2P file sharing application. In [1], we have investigated the performance of a crawling peer by means of simulations. Now, we show a time-discrete analysis of the crawling peer’s performance in order to investigate different scenarios and to enable parameter-sensitivity studies for further improvements of the crawling peer’s strategy.

Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture Hoßfeld, Tobias (2005, September 2).

[ BibTeX ]
[ EndNote ]

@presentation{info3-talk-2005-125,
  address = {19th International Teletraffic Congress (ITC19), Beijing, China},
  author = {Hoßfeld, Tobias},
  keywords = {mobileptp},
  month = 9,
  title = {Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture},
  year = 2005
}

%0 Generic
%1 info3-talk-2005-125
%A Hoßfeld, Tobias
%C 19th International Teletraffic Congress (ITC19), Beijing, China
%D 2005
%T Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture

Mapping of File-Sharing onto Mobile Environments: Feasibility and Performance of eDonkey with GPRS Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe in WCNC 2005 (2005).

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@inproceedings{info3-inproceedings-2005-156,
  address = {New Orleans, LA USA},
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe},
  booktitle = {WCNC 2005},
  keywords = {mobileptp},
  month = 3,
  title = {Mapping of File-Sharing onto Mobile Environments: Feasibility and Performance of eDonkey with GPRS},
  year = 2005
}

%0 Conference Paper
%1 info3-inproceedings-2005-156
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%B WCNC 2005
%C New Orleans, LA USA
%D 2005
%T Mapping of File-Sharing onto Mobile Environments: Feasibility and Performance of eDonkey with GPRS

Mapping of File-Sharing onto Mobile Environments: Enhancement by UMTS Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe in Mobile Peer-to-Peer Computing MP2P, in conjunction with the 3rd IEEE International Conference on Pervasive Computing and Communications (PerCom’05) (2005).

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Peer-to-Peer (P2P) file-sharing has become a major application in the Internet with respect to traffic volume which is even surpassing web usage. This characteristic makes P2P commercially attractive to network operators interested in increased traffic. In parallel, the demand for wireless services has caused wireless networks to grow enormously. We assume that P2P file-sharing will be mapped onto mobile environments by its users. This results in a mobile P2P file-sharing service, which we denote as mobile P2P. In this paper, we examine the feasibility of the eDonkey file-sharing service in GPRS networks, detect problems of the interaction between P2P and the mobile network, and find solutions to overcome them. Furthermore, this paper measures and analyzes the characteristics of mobile P2P and gives first empirical performance values. Summarizing, the goal is the analysis of feasibility for an Internet-based filesharing application in a mobile network and to provide first measurements from two real-world networks.

@inproceedings{info3-inproceedings-2005-157,
  abstract = {Peer-to-Peer (P2P) file-sharing has become a major application in the Internet with respect to traffic volume which is even surpassing web usage. This characteristic makes P2P commercially attractive to network operators interested in increased traffic. In parallel, the demand for wireless services has caused wireless networks to grow enormously. We assume that P2P file-sharing will be mapped onto mobile environments by its users. This results in a mobile P2P file-sharing service, which we denote as mobile P2P. In this paper, we examine the feasibility of the eDonkey file-sharing service in GPRS networks, detect problems of the interaction between P2P and the mobile network, and find solutions to overcome them. Furthermore, this paper measures and analyzes the characteristics of mobile P2P and gives first empirical performance values. Summarizing, the goal is the analysis of feasibility for an Internet-based filesharing application in a mobile network and to provide first measurements from two real-world networks.},
  address = {Kauai Island, Hawaii},
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe},
  booktitle = {Mobile Peer-to-Peer Computing MP2P, in conjunction with the 3rd IEEE International Conference on Pervasive Computing and Communications (PerCom'05)},
  keywords = {mobileptp},
  month = 3,
  title = {Mapping of File-Sharing onto Mobile Environments: Enhancement by UMTS},
  year = 2005
}

%0 Conference Paper
%1 info3-inproceedings-2005-157
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%B Mobile Peer-to-Peer Computing MP2P, in conjunction with the 3rd IEEE International Conference on Pervasive Computing and Communications (PerCom'05)
%C Kauai Island, Hawaii
%D 2005
%T Mapping of File-Sharing onto Mobile Environments: Enhancement by UMTS
%X Peer-to-Peer (P2P) file-sharing has become a major application in the Internet with respect to traffic volume which is even surpassing web usage. This characteristic makes P2P commercially attractive to network operators interested in increased traffic. In parallel, the demand for wireless services has caused wireless networks to grow enormously. We assume that P2P file-sharing will be mapped onto mobile environments by its users. This results in a mobile P2P file-sharing service, which we denote as mobile P2P. In this paper, we examine the feasibility of the eDonkey file-sharing service in GPRS networks, detect problems of the interaction between P2P and the mobile network, and find solutions to overcome them. Furthermore, this paper measures and analyzes the characteristics of mobile P2P and gives first empirical performance values. Summarizing, the goal is the analysis of feasibility for an Internet-based filesharing application in a mobile network and to provide first measurements from two real-world networks.

Influence of the Size of Swapping Entities in Mobile P2P File-Sharing Networks Hoßfeld, Tobias; Tutschku, Kurt; Schlosser, Daniel in Peer-to-Peer-Systeme und -Anwendungen (2005).

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Peer-to-Peer (P2P) file-sharing has become the killer application in the wired Internet and might also be highly attractive for mobile networks. In particular since UMTS operators are searching for new applications which do both: a) exploit the potential of the UMTS technology and b) motivate the user to adopt the new technology. Mobile networks differ from wireline networks mainly by the limited capacity of the radio link, the mobility of the users, and the anticipated content exchanged in these networks. P2P networks, in contrast, are overlays which run on top of a transport network. They consider the transport network only in an abstract way. P2P performance is typically considered on overlay level only. In a mobile environment, the question arises, whether the abstraction can be maintained for underlying mobile transport networks, too, and whether there will be a performance impact. In this paper we investigate the performance of a multiple source download mechanism as used in the popular eDonkey file-sharing network. The performance of the proposed mobile P2P architecture has already been considered for several factors, like the capacity of the mobile access network, the mobility of the users, the application of the cache peer, and the size of typical contents of mobile users such as ring tones, images, and mp3 audio files. However, the performance may be increased by adapting the size of the swapping entities in dependence on these main influence factors. The swapping entities are the smallest units for uploading and downloading user data and are called chunks and blocks, respectively. In this work, we show if and how the swapping entities influence the entire system.

@inproceedings{info3-inproceedings-2005-158,
  abstract = {Peer-to-Peer (P2P) file-sharing has become the killer application in the wired Internet and might also be highly attractive for mobile networks. In particular since UMTS operators are searching for new applications which do both: a) exploit the potential of the UMTS technology and b) motivate the user to adopt the new technology. Mobile networks differ from wireline networks mainly by the limited capacity of the radio link, the mobility of the users, and the anticipated content exchanged in these networks. P2P networks, in contrast, are overlays which run on top of a transport network. They consider the transport network only in an abstract way. P2P performance is typically considered on overlay level only. In a mobile environment, the question arises, whether the abstraction can be maintained for underlying mobile transport networks, too, and whether there will be a performance impact. In this paper we investigate the performance of a multiple source download mechanism as used in the popular eDonkey file-sharing network. The performance of the proposed mobile P2P architecture has already been considered for several factors, like the capacity of the mobile access network, the mobility of the users, the application of the cache peer, and the size of typical contents of mobile users such as ring tones, images, and mp3 audio files. However, the performance may be increased by adapting the size of the swapping entities in dependence on these main influence factors. The swapping entities are the smallest units for uploading and downloading user data and are called chunks and blocks, respectively. In this work, we show if and how the swapping entities influence the entire system.},
  address = {GI/ITG-Workshop in Kooperation mit KiVS 2005, Kaiserslautern},
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Schlosser, Daniel},
  booktitle = {Peer-to-Peer-Systeme und -Anwendungen},
  keywords = {mobileptp},
  month = 3,
  title = {Influence of the Size of Swapping Entities in Mobile P2P File-Sharing Networks},
  year = 2005
}

%0 Conference Paper
%1 info3-inproceedings-2005-158
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Schlosser, Daniel
%B Peer-to-Peer-Systeme und -Anwendungen
%C GI/ITG-Workshop in Kooperation mit KiVS 2005, Kaiserslautern
%D 2005
%T Influence of the Size of Swapping Entities in Mobile P2P File-Sharing Networks
%X Peer-to-Peer (P2P) file-sharing has become the killer application in the wired Internet and might also be highly attractive for mobile networks. In particular since UMTS operators are searching for new applications which do both: a) exploit the potential of the UMTS technology and b) motivate the user to adopt the new technology. Mobile networks differ from wireline networks mainly by the limited capacity of the radio link, the mobility of the users, and the anticipated content exchanged in these networks. P2P networks, in contrast, are overlays which run on top of a transport network. They consider the transport network only in an abstract way. P2P performance is typically considered on overlay level only. In a mobile environment, the question arises, whether the abstraction can be maintained for underlying mobile transport networks, too, and whether there will be a performance impact. In this paper we investigate the performance of a multiple source download mechanism as used in the popular eDonkey file-sharing network. The performance of the proposed mobile P2P architecture has already been considered for several factors, like the capacity of the mobile access network, the mobility of the users, the application of the cache peer, and the size of typical contents of mobile users such as ring tones, images, and mp3 audio files. However, the performance may be increased by adapting the size of the swapping entities in dependence on these main influence factors. The swapping entities are the smallest units for uploading and downloading user data and are called chunks and blocks, respectively. In this work, we show if and how the swapping entities influence the entire system.

Enabling Mobile Peer-to-Peer Networking Oberender, Jens; Andersen, Frank-Uwe; de Meer, Hermann; Dedinski, Ivan; Hoßfeld, Tobias; Kappler, Cornelia; Mäder, Andreas; Tutschku, Kurt in Mobile and Wireless Systems, LNCS 3427 (2005).

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P2P file sharing systems account for a high percentage of the traffic volume in the fixed Internet, having exceeded http (WWW) or email traffic [1] [2]. The increasing availability of mobile data networks such as GPRS and UMTS in conjunction with attractive pricing schemes makes P2P file sharing an interesting application also in the mobile context. But the operation of P2P systems in mobile environments encounters several problems, such as a relatively narrow and expensive air interface, highly varying online states (presence) of the subscribers, a hierarchical network structure (GPRS), and limited device capabilities. P2P is a distributed application architecture where equal entities, denoted as peers, voluntarily share resources, e.g. files or CPU cycles, via direct, end-to-end exchanges. In order to share resources, P2P applications need to support two fundamental coordination and control functions: Resource mediation mechanisms, i.e. functions to locate resources or entities, and resource control mechanisms, i.e. functions to permit, prioritize, and schedule the access to resources. Pure P2P architectures are implementing both mechanisms in a fully decentralized manner [3], while Hybrid P2P systems utilize central entities that collect mediation data. An example for a Hybrid P2P system is the eDonkey filesharing protocol, where the index servers collect and distribute file location information about all peers. The desire of mobile network operators is to add value to the P2P data flows and to turn P2P into a service they can charge for. When creating such services operators retain control on traffic and content. However the basic P2P user experience and connectivity should be preserved. In this paper, we describe such a service and analyze its impact on the network usage by means of a simulation.

@inproceedings{info3-inproceedings-2005-161,
  abstract = {P2P file sharing systems account for a high percentage of the traffic volume in the fixed Internet, having exceeded http (WWW) or email traffic [1] [2]. The increasing availability of mobile data networks such as GPRS and UMTS in conjunction with attractive pricing schemes makes P2P file sharing an interesting application also in the mobile context. But the operation of P2P systems in mobile environments encounters several problems, such as a relatively narrow and expensive air interface, highly varying online states (presence) of the subscribers, a hierarchical network structure (GPRS), and limited device capabilities. P2P is a distributed application architecture where equal entities, denoted as peers, voluntarily share resources, e.g. files or CPU cycles, via direct, end-to-end exchanges. In order to share resources, P2P applications need to support two fundamental coordination and control functions: Resource mediation mechanisms, i.e. functions to locate resources or entities, and resource control mechanisms, i.e. functions to permit, prioritize, and schedule the access to resources. Pure P2P architectures are implementing both mechanisms in a fully decentralized manner [3], while Hybrid P2P systems utilize central entities that collect mediation data. An example for a Hybrid P2P system is the eDonkey filesharing protocol, where the index servers collect and distribute file location information about all peers. The desire of mobile network operators is to add value to the P2P data flows and to turn P2P into a service they can charge for. When creating such services operators retain control on traffic and content. However the basic P2P user experience and connectivity should be preserved. In this paper, we describe such a service and analyze its impact on the network usage by means of a simulation.},
  address = {Dagstuhl, Germany},
  author = {Oberender, Jens and Andersen, Frank-Uwe and de Meer, Hermann and Dedinski, Ivan and Hoßfeld, Tobias and Kappler, Cornelia and Mäder, Andreas and Tutschku, Kurt},
  booktitle = {Mobile and Wireless Systems, LNCS 3427},
  keywords = {mobileptp},
  month = 1,
  title = {Enabling Mobile Peer-to-Peer Networking},
  year = 2005
}

%0 Conference Paper
%1 info3-inproceedings-2005-161
%A Oberender, Jens
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Dedinski, Ivan
%A Hoßfeld, Tobias
%A Kappler, Cornelia
%A Mäder, Andreas
%A Tutschku, Kurt
%B Mobile and Wireless Systems, LNCS 3427
%C Dagstuhl, Germany
%D 2005
%T Enabling Mobile Peer-to-Peer Networking
%X P2P file sharing systems account for a high percentage of the traffic volume in the fixed Internet, having exceeded http (WWW) or email traffic [1] [2]. The increasing availability of mobile data networks such as GPRS and UMTS in conjunction with attractive pricing schemes makes P2P file sharing an interesting application also in the mobile context. But the operation of P2P systems in mobile environments encounters several problems, such as a relatively narrow and expensive air interface, highly varying online states (presence) of the subscribers, a hierarchical network structure (GPRS), and limited device capabilities. P2P is a distributed application architecture where equal entities, denoted as peers, voluntarily share resources, e.g. files or CPU cycles, via direct, end-to-end exchanges. In order to share resources, P2P applications need to support two fundamental coordination and control functions: Resource mediation mechanisms, i.e. functions to locate resources or entities, and resource control mechanisms, i.e. functions to permit, prioritize, and schedule the access to resources. Pure P2P architectures are implementing both mechanisms in a fully decentralized manner [3], while Hybrid P2P systems utilize central entities that collect mediation data. An example for a Hybrid P2P system is the eDonkey filesharing protocol, where the index servers collect and distribute file location information about all peers. The desire of mobile network operators is to add value to the P2P data flows and to turn P2P into a service they can charge for. When creating such services operators retain control on traffic and content. However the basic P2P user experience and connectivity should be preserved. In this paper, we describe such a service and analyze its impact on the network usage by means of a simulation.

Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe; de Meer, Hermann; Oberender, Jens in Next Generation Internet Networks NGI2005 (2005).

[ Abstract ]
[ BibTeX ]
[ EndNote ]
[ Download ]

Peer-to-Peer (P2P) file-sharing has become the killer application in the wired Internet and might also be highly attractive for mobile networks. In particular since UMTS operators are searching for new applications which do both: a) exploit the potential of the UMTS technology and b) motivate the user to adopt the new technology. In this work we are investigating the performance of an eDonkey-based mobile P2P file-sharing system by means of time-dynamic simulation. Mobile networks differ from wireline networks by the limited capacity of the radio link and the mobility of the users. P2P networks, in contrast, are overlays which consider the transport network in an abstract way. In a mobile environment, the question arises, whether the abstraction can be maintained and what will be the performance impact if there is any. We will show in detail how the mobile access technology (GPRS or UMTS), the churn behavior of mobile users, the file size of mobile specific content, and special infrastructure entities, such as a cache peer, influences the performance of the suggested mobile P2P file-sharing service.

@inproceedings{info3-inproceedings-2005-164,
  abstract = {Peer-to-Peer (P2P) file-sharing has become the killer application in the wired Internet and might also be highly attractive for mobile networks. In particular since UMTS operators are searching for new applications which do both: a) exploit the potential of the UMTS technology and b) motivate the user to adopt the new technology. In this work we are investigating the performance of an eDonkey-based mobile P2P file-sharing system by means of time-dynamic simulation. Mobile networks differ from wireline networks by the limited capacity of the radio link and the mobility of the users. P2P networks, in contrast, are overlays which consider the transport network in an abstract way. In a mobile environment, the question arises, whether the abstraction can be maintained and what will be the performance impact if there is any. We will show in detail how the mobile access technology (GPRS or UMTS), the churn behavior of mobile users, the file size of mobile specific content, and special infrastructure entities, such as a cache peer, influences the performance of the suggested mobile P2P file-sharing service.},
  address = {Rome, Italy},
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe and de Meer, Hermann and Oberender, Jens},
  booktitle = {Next Generation Internet Networks NGI2005},
  keywords = {mobileptp},
  month = 4,
  title = {Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System},
  year = 2005
}

%0 Conference Paper
%1 info3-inproceedings-2005-164
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Oberender, Jens
%B Next Generation Internet Networks NGI2005
%C Rome, Italy
%D 2005
%T Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System
%X Peer-to-Peer (P2P) file-sharing has become the killer application in the wired Internet and might also be highly attractive for mobile networks. In particular since UMTS operators are searching for new applications which do both: a) exploit the potential of the UMTS technology and b) motivate the user to adopt the new technology. In this work we are investigating the performance of an eDonkey-based mobile P2P file-sharing system by means of time-dynamic simulation. Mobile networks differ from wireline networks by the limited capacity of the radio link and the mobility of the users. P2P networks, in contrast, are overlays which consider the transport network in an abstract way. In a mobile environment, the question arises, whether the abstraction can be maintained and what will be the performance impact if there is any. We will show in detail how the mobile access technology (GPRS or UMTS), the churn behavior of mobile users, the file size of mobile specific content, and special infrastructure entities, such as a cache peer, influences the performance of the suggested mobile P2P file-sharing service.

Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture Hoßfeld, Tobias; Mäder, Andreas; Tutschku, Kurt; Tran-Gia, Phuoc; Andersen, Frank-Uwe; de Meer, Hermann; Dedinski, Ivan in 19th International Teletraffic Congress (ITC19) (2005).

[ Abstract ]
[ BibTeX ]
[ EndNote ]
[ Download ]

Mobile networks differ from their wireline counterparts mainly by the high costs for air transmissions and by the mobility of the users. A new entity, denoted as the crawling peer, is suggested in order to optimize the resource mediation mechanism for a mobile P2P file sharing application. The crawling peer locates content on behalf of mobile peers. It is placed in the wireline part of the mobile network and thus, does not suffer from the above mentioned restrictions. The crawling peer is part of a comprehensive mobile P2P file sharing architecture [1] which is based on the popular eDonkey file sharing application. The performance of three querying strategies of the crawling peer is investigated with respect to banning at the index servers and the response time of requests, i.e. the time to find a file. The results show that the selection of an appropriate request strategy for the crawling peer maximizes the probability of locating a file while the probability to be banned by an eDonkey index server is minimized.

@inproceedings{info3-inproceedings-2005-192,
  abstract = {Mobile networks differ from their wireline counterparts mainly by the high costs for air transmissions and by the mobility of the users. A new entity, denoted as the crawling peer, is suggested in order to optimize the resource mediation mechanism for a mobile P2P file sharing application. The crawling peer locates content on behalf of mobile peers. It is placed in the wireline part of the mobile network and thus, does not suffer from the above mentioned restrictions. The crawling peer is part of a comprehensive mobile P2P file sharing architecture [1] which is based on the popular eDonkey file sharing application. The performance of three querying strategies of the crawling peer is investigated with respect to banning at the index servers and the response time of requests, i.e. the time to find a file. The results show that the selection of an appropriate request strategy for the crawling peer maximizes the probability of locating a file while the probability to be banned by an eDonkey index server is minimized.},
  address = {Beijing, China},
  author = {Hoßfeld, Tobias and Mäder, Andreas and Tutschku, Kurt and Tran-Gia, Phuoc and Andersen, Frank-Uwe and de Meer, Hermann and Dedinski, Ivan},
  booktitle = {19th International Teletraffic Congress (ITC19)},
  keywords = {mobileptp},
  month = 9,
  title = {Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture},
  year = 2005
}

%0 Conference Paper
%1 info3-inproceedings-2005-192
%A Hoßfeld, Tobias
%A Mäder, Andreas
%A Tutschku, Kurt
%A Tran-Gia, Phuoc
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Dedinski, Ivan
%B 19th International Teletraffic Congress (ITC19)
%C Beijing, China
%D 2005
%T Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture
%X Mobile networks differ from their wireline counterparts mainly by the high costs for air transmissions and by the mobility of the users. A new entity, denoted as the crawling peer, is suggested in order to optimize the resource mediation mechanism for a mobile P2P file sharing application. The crawling peer locates content on behalf of mobile peers. It is placed in the wireline part of the mobile network and thus, does not suffer from the above mentioned restrictions. The crawling peer is part of a comprehensive mobile P2P file sharing architecture [1] which is based on the popular eDonkey file sharing application. The performance of three querying strategies of the crawling peer is investigated with respect to banning at the index servers and the response time of requests, i.e. the time to find a file. The results show that the selection of an appropriate request strategy for the crawling peer maximizes the probability of locating a file while the probability to be banned by an eDonkey index server is minimized.

Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture Hoßfeld, Tobias; Mäder, Andreas; Tutschku, Kurt; Tran-Gia, Phuoc; Andersen, Frank-Uwe; de Meer, Hermann; Dedinski, Ivan (2005).

[ BibTeX ]
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@techreport{info3-techreport-2005-177,
  author = {Hoßfeld, Tobias and Mäder, Andreas and Tutschku, Kurt and Tran-Gia, Phuoc and Andersen, Frank-Uwe and de Meer, Hermann and Dedinski, Ivan},
  institution = {University of Wuerzburg},
  keywords = {mobileptp},
  month = 4,
  number = 356,
  title = {Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture},
  year = 2005
}

%0 Report
%1 info3-techreport-2005-177
%A Hoßfeld, Tobias
%A Mäder, Andreas
%A Tutschku, Kurt
%A Tran-Gia, Phuoc
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Dedinski, Ivan
%D 2005
%N 356
%T Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture

Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe; de Meer, Hermann; Oberender, Jens (2005, April).

[ BibTeX ]
[ EndNote ]

@misc{info3-poster-2005-17,
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe and de Meer, Hermann and Oberender, Jens},
  booktitle = {Next Generation Internet Networks NGI2005},
  keywords = {mobileptp},
  month = 4,
  title = {Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System},
  year = 2005
}

%0 Generic
%1 info3-poster-2005-17
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Oberender, Jens
%B Next Generation Internet Networks NGI2005
%D 2005
%T Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System

Time-Discrete Analysis of the Crawling Strategy in an Optimized Mobile P2P Architecture Hoßfeld, Tobias; Mäder, Andreas; Tutschku, Kurt; Andersen, Frank-Uwe (2005).

[ BibTeX ]
[ EndNote ]
[ Download ]

@techreport{info3-techreport-2005-190,
  author = {Hoßfeld, Tobias and Mäder, Andreas and Tutschku, Kurt and Andersen, Frank-Uwe},
  institution = {University of Wuerzburg},
  keywords = {mobileptp},
  month = 12,
  number = 374,
  title = {Time-Discrete Analysis of the Crawling Strategy in an Optimized Mobile P2P Architecture},
  year = 2005
}

%0 Report
%1 info3-techreport-2005-190
%A Hoßfeld, Tobias
%A Mäder, Andreas
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%D 2005
%N 374
%T Time-Discrete Analysis of the Crawling Strategy in an Optimized Mobile P2P Architecture

Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture Hoßfeld, Tobias (2005, July 18).

[ BibTeX ]
[ EndNote ]

@presentation{info3-talk-2005-120,
  address = {5th IP Workshop, Würzburg, Germany},
  author = {Hoßfeld, Tobias},
  keywords = {mobileptp},
  month = 7,
  title = {Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture},
  year = 2005
}

%0 Generic
%1 info3-talk-2005-120
%A Hoßfeld, Tobias
%C 5th IP Workshop, Würzburg, Germany
%D 2005
%T Comparison of Crawling Strategies for an Optimized Mobile P2P Architecture

An Architecture Concept for Mobile P2P File sharing Services - Evaluation and possibilities for Self-Organization Tutschku, Kurt (2004, October 5).

[ BibTeX ]
[ EndNote ]

@presentation{info3-talk-2004-133,
  address = {Dagstuhl-Seminar 04411: "Service Management and Self-Organization in IP-based Networks"},
  author = {Tutschku, Kurt},
  keywords = {mobileptp},
  month = 10,
  title = {An Architecture Concept for Mobile P2P File sharing Services - Evaluation and possibilities for Self-Organization},
  year = 2004
}

%0 Generic
%1 info3-talk-2004-133
%A Tutschku, Kurt
%C Dagstuhl-Seminar 04411: "Service Management and Self-Organization in IP-based Networks"
%D 2004
%T An Architecture Concept for Mobile P2P File sharing Services - Evaluation and possibilities for Self-Organization

Mapping of File-Sharing onto Mobile Environments: Feasibility and Performance of eDonkey with GPRS Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe (2004).

[ BibTeX ]
[ EndNote ]
[ Download ]

@techreport{info3-techreport-2004-160,
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe},
  institution = {University of Wuerzburg},
  keywords = {mobileptp},
  month = 8,
  number = 338,
  title = {Mapping of File-Sharing onto Mobile Environments: Feasibility and Performance of eDonkey with GPRS},
  year = 2004
}

%0 Report
%1 info3-techreport-2004-160
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%D 2004
%N 338
%T Mapping of File-Sharing onto Mobile Environments: Feasibility and Performance of eDonkey with GPRS

Mapping of File-Sharing onto Mobile Environments: Enhancement by UMTS Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe (2004).

[ BibTeX ]
[ EndNote ]
[ Download ]

@techreport{info3-techreport-2004-164,
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe},
  institution = {University of Wuerzburg},
  keywords = {mobileptp},
  month = 11,
  number = 343,
  title = {Mapping of File-Sharing onto Mobile Environments: Enhancement by UMTS},
  year = 2004
}

%0 Report
%1 info3-techreport-2004-164
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%D 2004
%N 343
%T Mapping of File-Sharing onto Mobile Environments: Enhancement by UMTS

An Architecture Concept for Mobile P2P File Sharing Services Hoßfeld, Tobias; Mäder, Andreas; Tutschku, Kurt; Andersen, Frank-Uwe; Kappler, Cornelia; de Meer, Hermann; Dedinski, Ivan; Oberender, Jens (2004).

[ BibTeX ]
[ EndNote ]
[ Download ]

@techreport{info3-techreport-2004-165,
  author = {Hoßfeld, Tobias and Mäder, Andreas and Tutschku, Kurt and Andersen, Frank-Uwe and Kappler, Cornelia and de Meer, Hermann and Dedinski, Ivan and Oberender, Jens},
  institution = {University of Wuerzburg},
  keywords = {mobileptp},
  month = 11,
  number = 344,
  title = {An Architecture Concept for Mobile P2P File Sharing Services},
  year = 2004
}

%0 Report
%1 info3-techreport-2004-165
%A Hoßfeld, Tobias
%A Mäder, Andreas
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%A Kappler, Cornelia
%A de Meer, Hermann
%A Dedinski, Ivan
%A Oberender, Jens
%D 2004
%N 344
%T An Architecture Concept for Mobile P2P File Sharing Services

Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System Hoßfeld, Tobias; Tutschku, Kurt; Andersen, Frank-Uwe; de Meer, Hermann; Oberender, Jens (2004).

[ BibTeX ]
[ EndNote ]
[ Download ]

@techreport{info3-techreport-2004-166,
  author = {Hoßfeld, Tobias and Tutschku, Kurt and Andersen, Frank-Uwe and de Meer, Hermann and Oberender, Jens},
  institution = {University of Wuerzburg},
  keywords = {mobileptp},
  month = 11,
  number = 345,
  title = {Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System},
  year = 2004
}

%0 Report
%1 info3-techreport-2004-166
%A Hoßfeld, Tobias
%A Tutschku, Kurt
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Oberender, Jens
%D 2004
%N 345
%T Simulative Performance Evaluation of a Mobile Peer-to-Peer File-Sharing System

An Architecture Concept for Mobile P2P File Sharing Services Andersen, Frank-Uwe; de Meer, Hermann; Dedinski, Ivan; Kappler, Cornelia; Mäder, Andreas; Oberender, Jens; Tutschku, Kurt in Workshop at Informatik 2004 - Algorithms and Protocols for Efficient Peer-to-Peer Applications (2004).

[ Abstract ]
[ BibTeX ]
[ EndNote ]

P2P file sharing is an interesting application in a mobile data network such as GSM/GPRS and UMTS. In particular in mobile environments, operation of P2P systems encounters several problems, such as a relatively narrow and expensive air interface, highly varying online-state (presence) of subscribers, hierarchical network structure, and limited device capabilities. The desire of operators is to add some value to P2P data flows and to turn them into services. At least some control over traffic and content should be possible, while preserving the basic P2P user experience and connectivity. Operation of P2P file sharing services in next generation mobile networks has to suit the needs of users as well as to accommodate the constraints imposed by 3G mobile technology and 3G network operation.

@inproceedings{info3-inproceedings-2004-147,
  abstract = {P2P file sharing is an interesting application in a mobile data network such as GSM/GPRS and UMTS. In particular in mobile environments, operation of P2P systems encounters several problems, such as a relatively narrow and expensive air interface, highly varying online-state (presence) of subscribers, hierarchical network structure, and limited device capabilities. The desire of operators is to add some value to P2P data flows and to turn them into services. At least some control over traffic and content should be possible, while preserving the basic P2P user experience and connectivity. Operation of P2P file sharing services in next generation mobile networks has to suit the needs of users as well as to accommodate the constraints imposed by 3G mobile technology and 3G network operation.},
  address = {Ulm},
  author = {Andersen, Frank-Uwe and de Meer, Hermann and Dedinski, Ivan and Kappler, Cornelia and Mäder, Andreas and Oberender, Jens and Tutschku, Kurt},
  booktitle = {Workshop at Informatik 2004 - Algorithms and Protocols for Efficient Peer-to-Peer Applications},
  keywords = {mobileptp},
  month = 9,
  title = {An Architecture Concept for Mobile P2P File Sharing Services},
  year = 2004
}

%0 Conference Paper
%1 info3-inproceedings-2004-147
%A Andersen, Frank-Uwe
%A de Meer, Hermann
%A Dedinski, Ivan
%A Kappler, Cornelia
%A Mäder, Andreas
%A Oberender, Jens
%A Tutschku, Kurt
%B Workshop at Informatik 2004 - Algorithms and Protocols for Efficient Peer-to-Peer Applications
%C Ulm
%D 2004
%T An Architecture Concept for Mobile P2P File Sharing Services
%X P2P file sharing is an interesting application in a mobile data network such as GSM/GPRS and UMTS. In particular in mobile environments, operation of P2P systems encounters several problems, such as a relatively narrow and expensive air interface, highly varying online-state (presence) of subscribers, hierarchical network structure, and limited device capabilities. The desire of operators is to add some value to P2P data flows and to turn them into services. At least some control over traffic and content should be possible, while preserving the basic P2P user experience and connectivity. Operation of P2P file sharing services in next generation mobile networks has to suit the needs of users as well as to accommodate the constraints imposed by 3G mobile technology and 3G network operation.

Mobile Peer-to-Peer

MoPi Project Team

Summary

Software

Publications

Data privacy protection

Data privacy protection

Picture credits