Lukas Kilian Schumann M. Sc.

• Repeatable Experiments, Inspectable Results: Lessons from Private 5G Campus Networks. Schumann, Lukas Kilian; Raffeck, Simon; Geißler, Stefan; Hoßfeld, Tobias. In KuVS Fachgespräch - Würzburg Workshop on 6G Networks (WueWoWAS’26). 2026.
  • [ BibTeX ]
  @inproceedings{info3-inproceedings-2026-5, abstract = {Private 5G campus networks provide flexible environments for studying future mobile systems, but the same flexibility makes measurement results difficult to interpret and compare. Configuration choices, software versions, modem behavior, radio placement, and observability limitations can all affect reported QoS and energy metrics. This work synthesizes lessons from our prior and ongoing work on reproducibility-oriented 5G campus-network experimentation, including an automation workflow, energy-aware parameter studies, and a comparative measurement study of modem-specific influences. From this, we argue that trustworthy private network measurements require experiment state reporting, artifact preservation, explicit observability limits, and multi-artifact corroboration. Examples from our work include configuration-dependent UE power, non-linear gain effects, incomplete or implausible channel metrics, and modem-specific throughput, delay, and SNR behavior. We derive methodological requirements for inspectable results and outline open challenges around larger modem pools, RedCap devices, MCS-aware energy modeling, segmentation- and retransmission-aware delay attribution, and future O-RAN split integration.}, author = {Schumann, Lukas Kilian and Raffeck, Simon and Geißler, Stefan and Hoßfeld, Tobias}, booktitle = {KuVS Fachgespräch - Würzburg Workshop on 6G Networks (WueWoWAS’26)}, keywords = {sustainet-advance}, month = {09}, title = {Repeatable Experiments, Inspectable Results: Lessons from Private 5G Campus Networks}, year = 2026 }
• More is Always Better? Investigating QoS and Energy Efficiency in 5G Campus Networks. Schumann, Lukas Kilian; Raffeck, Simon; Geißler, Stefan; Hoßfeld, Tobias. In 2026 IEEE 12th International Conference on Network Softwarization (NetSoft). 2026.
  • [ BibTeX ]
  @inproceedings{info3-inproceedings-2026-4, abstract = {As 5G pushes mobile networking toward flexible, softwarized radio access networks, energy efficiency emerges as a first-class performance metric. However, the relationship between 5G NR configuration parameters, power draw, and performance have yet to be systematically explored. To this end, this work introduces a custom automation framework to conduct a large-scale parameter study and investigate the key interactions between Quality of Service (QoS), power consumption, and individual 5G NR configuration parameters. The evaluation conducted in a 5G campus testbed utilizing OAI and srsRAN applies a factorial design to a large set of parameters. In total over 7000 individual experiments are conducted, the results of which are made publicly available, in addition to the framework. The data reveals that 5G NR energy efficiency is highly dependent on the specific use case, as configuration settings can lead to contradictory results based on traffic load and performance targets.}, author = {Schumann, Lukas Kilian and Raffeck, Simon and Geißler, Stefan and Hoßfeld, Tobias}, booktitle = {2026 IEEE 12th International Conference on Network Softwarization (NetSoft)}, keywords = {sustainet-advance}, title = {More is Always Better? Investigating QoS and Energy Efficiency in 5G Campus Networks}, year = 2026 }

• Reliable control and accurate live visualization of inter-arrival times and burstiness for real-time networks on low-end hardware. Technical Report (Master thesis), . Schumann, Lukas Kilian. Master thesis. Universität Würzburg, 2024, January.
  • [ BibTeX ]
  @mastersthesis{info3-praktikum-2024-5, author = {Schumann, Lukas Kilian}, keywords = {sys:hidden:supervisor:simon.raffeck}, month = {01}, school = {Universität Würzburg}, title = {Reliable control and accurate live visualization of inter-arrival times and burstiness for real-time networks on low-end hardware}, year = 2024 }

• Accurate Live Visualization of Packet Delays, Inter-Arrival Times, and Burstiness for Real-Time Networks. Grigorjew, Alexej; Geißler, Stefan; Ziegler, Maximilian; Schumann, Lukas Kilian; Diederich, Philip; Hock, David; Hoßfeld, Tobias; Kellerer, Wolfgang. In International Conference on Networked Systems 2023 (NetSys). 2023.
  • [ BibTeX ]
  @inproceedings{info3-inproceedings-2023-14, abstract = {In this demonstration, a live delay and traffic volume visualization is presented. It is created with consumer off-the-shelf components, provides sub-microsecond accuracy, and provides sufficient performance for line rate measurements without sampling. The tool can help to accelerate the development and operation of real-time networks.}, author = {Grigorjew, Alexej and Geißler, Stefan and Ziegler, Maximilian and Schumann, Lukas Kilian and Diederich, Philip and Hock, David and Hoßfeld, Tobias and Kellerer, Wolfgang}, booktitle = {International Conference on Networked Systems 2023 (NetSys)}, keywords = {kosinu5}, month = {09}, title = {Accurate Live Visualization of Packet Delays, Inter-Arrival Times, and Burstiness for Real-Time Networks}, year = 2023 }
• Understanding the Performance of Different Packet Reception and Timestamping Methods in Linux. Grigorjew, Alexej; Schumann, Lukas Kilian; Diederich, Philip; Hoßfeld, Tobias; Kellerer, Wolfgang. In WueWoWAS’23 KuVS Fachgespraech - Wuerzburg Workshop on Next-Generation Communication Networks. 2023.
  • [ BibTeX ]
  @inproceedings{info3-inproceedings-2023-11, abstract = {This document briefly presents some renowned packet reception techniques for network packets in Linux systems. Further, it compares their performance when measuring packet timestamps with respect to throughput and accuracy. Both software and hardware timestamps are compared, and various parameters are examined, including frame size, link speed, network interface card, and CPU load. The results indicate that hardware timestamping offers significantly better accuracy with no downsides, and that packet reception techniques that avoid system calls offer superior measurement throughput.}, author = {Grigorjew, Alexej and Schumann, Lukas Kilian and Diederich, Philip and Hoßfeld, Tobias and Kellerer, Wolfgang}, booktitle = {WueWoWAS'23 KuVS Fachgespraech - Wuerzburg Workshop on Next-Generation Communication Networks}, keywords = {appaware2}, month = {06}, title = {Understanding the Performance of Different Packet Reception and Timestamping Methods in Linux}, year = 2023 }

• Investigation of Hardware and Software Timestamping in Different Network Interfaces. Technical Report (Master thesis), . Schumann, Lukas Kilian. Master thesis. University of Wuerzburg, 2021.
  • [ BibTeX ]
  @mastersthesis{info3-bachelor-2021-20, abstract = {Kontakt: <alexej.grigorjew@uni-wuerzburg.de> - Ziel: Vergleich unterschiedlicher Mechanismen zum Timestamping von eingehenden (und ggf. ausgehenden) Paketen mit unterschiedlichen Netzwerkkarten und Endgeräten; Betrachtung von Genauigkeiten, Unterschieden, Konsistenz, Voraussetzungen und Aufwand}, author = {Schumann, Lukas Kilian}, keywords = {sys:hidden:bachelor}, school = {University of Wuerzburg}, title = {Investigation of Hardware and Software Timestamping in Different Network Interfaces}, year = 2021 }