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Is CSMA Able to Coordinate Multiple Access in Vehicular Radio Channels Effectively?

Mittag, J. 1; Hartenstein, H. 1
1 Scientific Computing Center (SCC), Karlsruher Institut für Technologie (KIT)


The first generation of inter-vehicle communication networks will most likely be based on the IEEE 802.11p standard. That is, they are going to deploy Carrier Sense Multiple Access (CSMA) to coordinate channel access among neighboring vehicles. Recently, concerns have been raised that fast-fading propagation conditions, i.e. a time- and frequency-selective fading as reported by several measurement campaigns in highway environments, might challenge the effectiveness of CSMA. These concerns also lead to the situation that alternative medium access control solutions are being discussed in standardization bodies. In this paper, we evaluate whether these concerns are justified or not. In comparison to previous studies, we use a high fidelity network simulator to study the extent by which the effectiveness of CSMA is reduced if such fading propagation conditions are considered. We also resolve the two reasons that may cause incoordination - either simultaneous transmission times or hidden terminal situations - and conclude that CSMA is able to effectively coordinate multiple access in vehicular radio channels as long as the load offered to the channel does not approach the maximum capacity.

Volltext §
DOI: 10.5445/IR/1000030163
DOI: 10.1109/ITST.2012.6425293
Zitationen: 4
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Telematik (TM)
Scientific Computing Center (SCC)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2012
Sprache Englisch
Identifikator ISBN: 978-1-4673-3071-8
KITopen-ID: 1000030163
Erschienen in Proceedings of the 12th International Conference on ITS Telecommunications, ITST 2012; Taipei; Taiwan; 5 November 2012 through 8 November 2012
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Seiten 801-806
Nachgewiesen in Scopus
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