Medium access control in vehicular networks based on the upcoming IEEE 802.11p standard
Paper i proceeding, 2008

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.

IEEE 802.11p

vehicular communication



traffic safety


Katrin Bilstrup

Högskolan i Halmstad

Chalmers University of Technology

Elisabeth Uhlemann

Högskolan i Halmstad


Erik Ström

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

15th World Congress on Intelligent Transport Systems and ITS America Annual Meeting 2008; New York, NY; United States; 16 November 2008 through 20 November 2008

Vol. 6 4155-4166