Mobile ad hoc networks are networks of mobile devices. In these networks the end-systems themselves are used to forward messages in a cooperative way from the sender towards one or more destinations. Application scenarios for mobile ad hoc networks are inter-vehicular communication, spontaneous message exchange between students or the relization of an access network for existing communication infrastructure.

In an ad hoc network the mobile devices within communication range have to share the capacity of the spectrum for transmitting data. Each device uses a (usually quite large) part of this capacity to forward messages for other nodes. Hence mobile ad hoc networks are even more prone to suffer from congestion than common wired networks are. One single sender may - be it accidentally or intentionally - cause a collapse of the whole network due to overload.

To utilize the capacity of the network better than it is possible with existing approaches, we will use the self organization capabilities of the network to protect it from congestion. Additionally, in mobile ad hoc networks it is possible to incorporate all communication layers into a congestion control mechanism since they all reside on accessible end-systems. By exploiting these two characteristics the network itself will be able to determine the current load situation and protect itself from congestion.

The goal of the project is to design, implement and evaluate mechanisms that realize this concept and are - despite the cross-layer approach - easily deployable in different mobile ad hoc networks.

CXCC is conducted as a part of the DFG Schwerpunktprogramm "Basissoftware für Selbstorganisierende Infrastrukturen für Vernetzte Mobile Systeme" (DFG SPP 1140).

People

Christian Lochert
Björn Scheuermann
Emilio Janzen

Contact

lochert(at)cs.uni-duesseldorf.de
scheuermann(at)cs.uni-duesseldorf.de

Publications

Wolfgang KiessBjörn ScheuermannTill ElsnerMartin MauveMethod for sharing wireless access points to a communications networkWO 2010 127806PCT EP2010 0026342010November 11

Jens Bendisposto, Michael Jastram, Michael Leuschel, Christian Lochert, Björn Scheuermann, Ingo Weigelt.
Validating Wireless Congestion Control and Realiability Protocols using ProB and Rodin. FMWS 2008: Workshop on Formal Methods for Wireless Systems, Toronto, ON, Canada, August 2008.

Björn Scheuermann, Christian Lochert, Martin Mauve.
Implicit Hop-by-Hop Congestion Control in Wireless Multihop Networks. Elsevier Ad Hoc Networks 6 (2), pp. 260-286, April 2008.

Björn Scheuermann, Matthias Transier, Christian Lochert, Martin Mauve, Wolfgang Effelsberg.
Backpressure Multicast Congestion Control in Mobile Ad-Hoc Networks. CoNEXT 2007: Proceedings of the 3rd International Conference on Emerging Networking Experiments and Technologies, pp. 265--275, New York, NY, USA, December 2007.

Björn Scheuermann, Wenjun Hu, Jon Crowcroft.
Near-Optimal Co-ordinated Coding in Wireless Multihop Networks. CoNEXT 2007: Proceedings of the 3rd International Conference on Emerging Networking Experiments and Technologies, pp. 97--108, New York, NY, USA, December 2007.

Christian Lochert, Björn Scheuermann, Martin Mauve.
A Survey on Congestion Control for Mobile Ad-Hoc Networks. Wiley Wireless Communications and Mobile Computing 7 (5), pp. 655-676, June 2007.

Yves Igor Jerschow, Björn Scheuermann, Christian Lochert, Martin Mauve.
A Real-World Framework to Evaluate Cross-Layer Protocols for Wireless Multihop Networks. REALMAN 2006: Proceedings of the Second ACM SIGMOBILE International Workshop on Multi-hop Ad Hoc Networks: from theory to reality, pp. 1--6, Florence, Italy, May 2006.

Yves Igor Jerschow, Björn Scheuermann, Christian Lochert, Martin Mauve.
A Cross-Layer Protocol Evaluation Framework on ESB Nodes. REALMAN 2006: Proceedings of the Second ACM SIGMOBILE International Workshop on Multi-hop Ad Hoc Networks: from theory to reality -- Demo Session, pp. 104--106, Florence, Italy, May 2006.

Björn Scheuermann, Holger Füßler, Matthias Transier, Marcel Busse, Martin Mauve, Wolfgang Effelsberg.
Huginn: A 3D Visualizer for Wireless ns-2 Traces. MSWiM 2005: Proceedings of the 8th ACM/IEEE International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems, Montreal, Quebec, Canada, October 2005.

Björn Scheuermann, Holger Füßler, Matthias Transier, Martin Mauve, Wolfgang Effelsberg.
Visualizing Wireless ns-2 Traces in 3D (Demo). MobiCom 2005: 11th Annual International Conference on Mobile Computing and Networking, Demo Session, Cologne, Germany, August 2005.

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