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

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Title Medium access control in vehicular networks based on the upcoming IEEE 802.11p standard
Author Katrin Bilstrup and Elisabeth Uhlemann and Erik G. Ström
Year 2008
PublicationType Conference Paper
Journal
HostPublication World Congress on Intelligent Transport Systems (ITS), 2008
DOI
Conference 15th World Congress on Intelligent Transport Systems (ITS), 15 - 20 November, 2008, Jacob K. Javits Convention Center, 36th St. & Eleventh Av. Manhattan, New York
Diva url http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239139
Abstract 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.