| Carl Friedrich Gauß Faculty | Department of Computer Science

The CCC research unit divides into three project areas with a total of nine projects. See the project's homepage for a full overview of the organization and objectives of CCC. The research group Connected and Mobile Systems of the IBR is responsible for the subproject A2, the Communication and Interaction Platform, of CCC, the research group Distributed Systems for the subproject A3 on resource efficient dynamic agreement and replication, and the Algorithms group for subproject B1 which covers Conflict Resolution and Optimization.

Project A2: Communication and Interaction Platform

Project A2, Communication and Interaction Platform, covers the interaction of the architectural components through networks. While CCC starts with platforms using local, closed networks with single owners, A2 will move the platform challenge up to the next level of open networks. This means that the interfaces as well as the underlying networking platforms and protocols between the different components must be flexible and dynamic. Platform guarantees cannot be given at the level of single components, but only in the form of platform services provided by a distributed resource control layer. A generic and abstract access to the networking platform and its services is needed where resource demands as well as constraints are adhered to. A2 will address the general communication architecture, which shall be able to ensure safety, availability and security properties in the system. This will require instantiation configuration of the networking infrastructure to ensure contract properties, e. g. instantiation of concurrent multi-path routing mechanisms to ensure high availability communication.

Project members in A2 at IBR

Martin Wegnerwegner[[at]]ibr.cs.tu-bs.de
Prof. Dr.-Ing. Lars Wolfwolf[[at]]ibr.cs.tu-bs.de+49-531-3913288138

Project A3: Resource efficient dynamic agreement and replication

The A3 subproject addresses a specific and refined question, namely how a set of CCC-controlled domains can be jointly reconfigured and how applications that are dispersed over multiple CCC-domains can be coordinated to establish an extended level of fault-tolerance. Thereby, faults are not limited to crashes but depending on the scenario range from hardware induced malfunctioning (e.g. bit flips) up to the extreme intentional and coordinated malicious behavior. In short such effects can be subsumed by Byzantine faults and are addressed by Byzantine fault-tolerance.

Project members in A3 at IBR

Wenbo Xuwxu[[at]]ibr.cs.tu-bs.de+49-531-3913266131
Prof. Dr. Rüdiger Kapitzakapitza[[at]]ibr.cs.tu-bs.de+49-531-3913294135

Project B1: Conflict Resolution and Optimization

Project members in B1 at IBR

Phillip Keldenichkeldenich[[at]]ibr.cs.tu-bs.de+49-531-3913112318
Prof. Dr. Sándor P. Feketes.fekete[[at]]tu-bs.de+49-531-3913111335


Kopplung zwischen Simulationsframework artery-lte und virtuellen Maschinen des Genode OS FrameworksMaster Thesis, Project ThesisMartin Wegnertentative
Performance-Messung und -Evaluation eines TCP-Tunnels für Multipath-TCPBachelor Thesis, Project ThesisMartin Wegnertentative
Umsetzung einer Connectivity Map im Simulationsframework artery-lteBachelor ThesisMartin Wegnerfinished
Konzeptionierung und Umsetzung mehrschichtiger Connectivity Maps im Simulationsframework artery-lteMaster ThesisMartin Wegnerfinished
Aktualisierung der Veins-Kernkomponente des Simulationsframeworks artery-lteProject Thesis, HiWi JobMartin Wegnerfinished
Demonstrator for Consensus Protocols in Wireless Ad-Hoc NetworksTeam Project ThesisMartin Wegner, Wenbo Xufinished
Development and implementation of an SCTP convergence layer for the Bundle ProtocolProject ThesisMartin Wegner, Stephan Rottmannfinished
Konzeptionierung von Multi-Level Contracts für die Kommunikation heterogener NetzanwendungenBachelor ThesisMartin Wegnerfinished
VANet-basierte Datenaggregation zum Aufbau einer kollektiven Wahrnehmung in einem BackendMaster ThesisMartin Wegner, Dr. Hendrik-Jörn Güntherfinished
Byzantine agreement service on distributed embedded systemsBachelor Thesis, Master Thesis, Project ThesisWenbo Xufinished

If you are interested in writing a thesis within this project, please feel free to contact the corresponding supervisors.


  • Wenbo Xu, Alexander Willecke, Martin Wegner, Lars Wolf and Rüdiger Kapitza: Autonomous Maneuver Coordination via Vehicular Communication, in 5th International Workshop on Safety and Security of Intelligent Vehicles (SSIV 2019), Portland, USA, 2019 (Xu:SSIV:2019, BibTeX, accepted for publication)
  • Keno Garlichs, Martin Wegner and Lars C Wolf: Realizing Collective Perception in the Artery Simulation Framework, in Vehicular Networking Conference (VNC), Taipei, Taiwan, IEEE, December 2018 (Garlichs:VNC:2018, BibTeX)
  • Martin Wegner, Timo Schwarz and Lars C Wolf: Connectivity Maps for V2I communication via ETSI ITS-G5, in Vehicular Networking Conference (VNC), Taipei, Taiwan, IEEE, December 2018 (Wegner:VNC:2018:1, BibTeX, accepted for publication)
  • Bernd Lehmann, Hendrik-Jörn Günther and Lars Wolf: A Generic Approach towards Maneuver Coordination for Automated Vehicles, in 21st International IEEE Conference on Intelligent Transportation Systems, Maui, Hawaii, USA, November 2018 (lehmann:ITSC2018, BibTeX, accepted for publication)
  • Bijun Li, Wenbo Xu and Rüdiger Kapitza: Dynamic State Partitioning in Parallelized Byzantine Fault Tolerance, in Proceedings of the 1st Workshop on Byzantine Consensus and Resilient Blockchains, BCRB'18, 2018 (blidypart, BibTeX)
  • Wenbo Xu, Signe Rüsch, Bijun Li and Rüdiger Kapitza: Hybrid Fault-Tolerant Consensus in Asynchronous and Wireless Embedded Systems, in 22nd International Conference on Principles of Distributed Systems (OPODIS 2018), Leibniz International Proceedings in Informatics (LIPIcs), pages 15:1-15:16, 2018 (xu2018opodis, DOI, BibTeX)
  • Wenbo Xu and Rüdiger Kapitza: RATCHETA: Memory-bounded Hybrid Byzantine Consensus for Cooperative Embedded Systems, in Proceedings of the 37th IEEE International Symposium on Reliable Distributed Systems, SRDS 18, 2018 (xu2018srds, BibTeX)
  • Wenbo Xu, Martin Wegner, Lars Wolf and Ruediger Kapitza: Byzantine Agreement Service for Cooperative Wireless Embedded Systems, in 3rd International Workshop on Safety and Security of Intelligent Vehicles (SSIV 2017), Denver, USA, IEEE, 2017 (Wegner:SSIV:2017, BibTeX, accepted for publication)
  • Hendrik-Jörn Günther, Julian Timpner, Martin Wegner, Raphael Riebl and Lars Wolf: Extending a Holistic Microscopic IVC Simulation Environment with Local Perception Sensors and LTE Capabilities, in Elsevier Vehicular Communications, Special Issue on Heterogeneous Vehicular Networking, Elsevier, 2017 (Wegner:VEHCOM:2017, BibTeX)
  • Sönke Holthusen, Sophie Quinton, Johannes Schlatow, Ina Schäfer and Martin Wegner: Using Multi-Viewpoint Contracts for Negotiation of Embedded Software Updates, in Pre- and Post-Deployment Verification Techniques (PrePost), Reykjavik, Iceland, June 2016 (Holthusen:PrePost:2016, BibTeX)
  • Julian Timpner, Martin Wegner, Hendrik-Jörn Günther and Lars Wolf: Towards a Multi-Protocol Microscopic IVC Simulation Environment for ADASs, Proceedings of the 4th GI/ITG KuVS Fachgespräch Inter-Vehicle Communication (FG-IVC 2016), Berlin, Germany, Humboldt University, March 2016 (Timpner:IVC:2016, BibTeX, urn:nbn:de:kobv:11-100237953)
  • Martin Wegner, Wenbo Xu, Rüdiger Kapitza and Lars Wolf: Byzantine Consensus in Vehicle Platooning via Inter-Vehicle Communication, Proceedings of the 4th GI/ITG KuVS Fachgespräch Inter-Vehicle Communication (FG-IVC 2016), Berlin, Germany, Humboldt University, March 2016 (Wegner:IVC:2016, BibTeX)
  • Julian Timpner, Martin Wegner, Hendrik-Jörn Günther and Lars C Wolf: High-Resolution Vehicle Telemetry via Heterogeneous IVC, in The 17th ACM International Symposium on Mobile Ad Hoc Networking and Computing: MobiHoc 2016-IoV-VoI Workshop (MobiHoc 2016-IoV-VoI Workshop), Paderborn, Germany, ACM Press, 2016 (Timpner:IoV:2016, DOI, BibTeX)
  • Martin Wegner, Stephan Rottmann and Lars C. Wolf: SCTPCL: An SCTP Convergence Layer Protocol for DTN, in Proceedings of the 11th ACM MobiCom Workshop on Challenged Networks, CHANTS '16, New York, NY, USA, ACM, 2016 (Wegner:CHANTS:2016, DOI, BibTeX)
  • Wenbo Xu, Z.A.H. Hammadeh, A. Kröller, R. Ernst and S. Quinton: Improved Deadline Miss Models for Real-Time Systems Using Typical Worst-Case Analysis, in Proceedings of the 27th Euromicro Conference on Real-Time Systems (ECRTS '15), pages 247-256, July 2015 (xu15ecrts, DOI, BibTeX)
  • Sándor P. Fekete, Björn Fiethe, Stephan Friedrichs, Harald Michalik and Christos Orlis: Efficient Reconfiguration of Processing Modules on FPGAs for Space Instruments, in To appear in: 2014 NASA/ESA Conference on Adaptive Hardware and Systems (AHS-2014), July 2014 (fffmo-eropmoffsi-14, BibTeX)

Project partners

The following four institutes are jointly working on the Controlling Concurrent Change project:


last changed 2016-10-24, 17:17 (dynamic content) by Martin Wegner