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1 Performance Evaluation of VeMAC Supporting Safety Applications in Vehicular Networks

By Hassan Aboubakr Omar, Student Member, Weihua Zhuang, Atef Abdrabou and Li Li


Abstract—Vehicular ad hoc networking is an emerging paradigm which is expected to increase the public safety standards and enhance the safety level of drivers/passengers and pedestrians on road through a variety of applications. We have recently proposed VeMAC, a medium access control protocol which supports a reliable one-hop broadcast service necessary for high priority safety applications in VANETs [1], [2], [3]. This paper explains how the VeMAC protocol can deliver both periodic and event-driven safety messages in vehicular networks, and presents a detailed delivery delay analysis, including queueing and service delays, for both types of safety messages. The probability mass function of the service delay is first derived, then the D/G/1 and M/G/1 queueing systems are used to calculate the average queueing delay of the periodic and event-driven safety messages respectively. As well, a comparison between the VeMAC protocol and the IEEE 802.11p standard [4] is presented via extensive simulations using the network simulator ns-2 [5] and the microscopic vehicle traffic simulator VISSIM [6]. A real city scenario is considered and different performance metrics are evaluated, including the network goodput, protocol overhead, channel utilization, protocol fairness, probability of a transmission collision, and message delivery delay. Index Terms—TDMA, medium access control, delay analysis, safety messages, and vehicular ad hoc networks.

Year: 2014
OAI identifier: oai:CiteSeerX.psu:
Provided by: CiteSeerX
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