IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Comparison of pre-backoff and post-backoff procedures for IEEE 802.11 distributed coordination function
Ping ZhongXuemin HongXiaofang WuJianghong ShiHuihuang Chen
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2011 Volume 8 Issue 24 Pages 2035-2040

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Abstract

Accurate analytical modeling of IEEE 802.11 distributed coordination function (DCF) is very important to characterize IEEE 802.11 medium access control (MAC) layer performance. The two backoff procedures used in the IEEE 802.11 DCF, namely pre-backoff and post-backoff procedures, are commonly treated as the same in existing analytical DCF models for simplicity. This paper makes the first effort to point out the difference between these two backoff procedures. Through intuitive reasoning and simulation results, we show that the two backoff procedures yield un-negligible differences in the performance of average access delay, but give the same performance of throughput.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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