Provisioning QoS controlled media access in vehicular to infrastructure communications

Authors:
Tom H. Luan;Xinhua Ling;Xuemin (Sherman) Shen
Affiliations:
Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, Canada N2L 3G1;Research In Motion, Waterloo, ON, Canada N2L 3W8;Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, Canada N2L 3G1
Venue:
Ad Hoc Networks
Year:
2012

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Abstract

The emerging IEEE 802.11p standard adopts the enhanced distributed channel access (EDCA) mechanism as its Media Access Control (MAC) scheme to support quality-of-service (QoS) in the rapidly changing vehicular environment. While the IEEE 802.11 protocol family represents the dominant solutions for wireless local area networks, its QoS performance in terms of throughput and delay, in the highly mobile vehicular networks, is still unclear. To explore an in-depth understanding on this issue, in this paper, we develop a comprehensive analytical model that takes into account both the QoS features of EDCA and the vehicle mobility (velocity and moving directions). Based on the model, we analyze the throughput performance and mean transmission delay of differentiated service traffic, and seek solutions to optimally adjust the parameters of EDCA towards the controllable QoS provision to vehicles. Analytical and simulation results are given to demonstrate the accuracy of the proposed model for varying EDCA parameters and vehicle velocity and density.