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Medium access control in vehicular networks based on the upcoming IEEE 802.11p standard

Katrin Bilstrup ; Elisabeth Uhlemann ; Erik G. Ström (Institutionen för signaler och system, Kommunikationssystem)
Proceedings of the 15th World Congress on Intelligent Transport Systems (2008)
[Konferensbidrag, refereegranskat]

In this paper, initial simulations are presented showing that the upcoming IEEE 802.11p standard is not suitable for traffic safety applications requiring reliable, low-delay communication between vehicles. The medium access control procedure is one of the most important parts in the design of delay-constrained communication systems, and emerging vehicle safety applications put new stringent demands on timely and reliable delivery of data packets. The medium access procedure used in 802.11p is carrier sense multiple access, which is inherently unsuitable for time-critical data traffic since it is contention-based and cannot provide a finite upper bound on the time to channel access. The simulation results indicate that with IEEE 802.11p, channel access cannot be granted in a manner that is sufficiently predictable to support reliable, low-delay communications between vehicles on a highway.

Nyckelord: IEEE 802.11p, MAC, V2V, vehicular communication, traffic safety

Denna post skapades 2009-03-09.
CPL Pubid: 91278