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IEICE Transactions on Communications 2007 E90-B(1):180-183; doi:10.1093/ietcom/e90-b.1.180
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Copyright © 2007 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letters -- Terrestrial Radio Communications

Performance Analysis of IEEE 802.11e EDCA*

Wei ZHANG1, Jun SUN1, Jing LIU1 and Haibin ZHANG1

1 The authors are with the Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China. E-mail: zh.wei{at}sjtu.edu.cn


  Abstract

This letter presents a clear and more accurate analytical model to evaluate the IEEE 802.11e enhanced distributed channel access (EDCA) protocol. The proposed model distinguishes internal collision from external collision. It also differentiates the two cases when the backoff counter decreases, i.e. an arbitration interframe space (AIFS) period after a busy duration and a time slot after the AIFS period. The analytical model is validated through simulation.

Key Words: EDCA, IEEE 802.11e, performance analysis, internal collision

Manuscript received May 17, 2006. Manuscript revised July 15, 2006.

* This work is sponsored by National Hi-Tech Research and Development Program of China (National 863 Program) under Grant No. 2003AA123310, and NSFC under Grant No. 60332030.


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