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International Journal of Vehicular Technology
Volume 2013 (2013), Article ID 846016, 8 pages
http://dx.doi.org/10.1155/2013/846016
Research Article

Performance Evaluation of IEEE 1609 WAVE for Vehicular Communications

1Department of Electrical Engineering, Tunghai University, 40704 Taichung, Taiwan
2Department of Electronic Communication Engineering, National Kaohsiung Marine University, 81157 Kaohsiung, Taiwan

Received 27 December 2012; Revised 17 March 2013; Accepted 31 March 2013

Academic Editor: Cheng-Min Lin

Copyright © 2013 Jyh-Horng Wen and Chien-Erh Weng. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In IEEE 1609, it uses IEEE 802.11 Enhanced Distributed Channel Access (EDCA) mechanism to access the channel. IEEE 802.11 EDCA is a new wireless technology for wireless access in the vehicular environment (WAVE). It defines a new supplement to the existing IEEE 802.11 MAC protocol. In IEEE 802.11 EDCA, the aim is providing a QoS support. While the system serves different access categories (ACs), EDCA does not perform well under high load conditions. In order to improve the efficiency, we pay attention to the EDCA with transmit opportunity (TXOP) mechanism. We first proposed a Markov chain model and studied the behavior. We extend the model to support IEEE 802.11 EDCA and presented a more accurate analysis under nonideal channel environment. We also compared it with that without TXOP mechanism under channel error environment.