一种最小竞争窗口自适应调整的802.11退避算法

朱颖; 夏海轮; 武穆清

doi:10.3724/SP.J.1146.2007.00184

一种最小竞争窗口自适应调整的802.11退避算法

doi: 10.3724/SP.J.1146.2007.00184

基金项目:

国家自然科学基金(60772109)资助课题

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出版历程
- 收稿日期: 2007-01-29
- 修回日期: 2007-09-11
- 刊出日期: 2008-04-19

A Self-adaptive Minimum Contention Window Adjusting Backoff Algorithm in IEEE 802.11 DCF

摘要

摘要: 该文在对原有的IEEE 802.11 DCF研究的基础上，提出了一种基于最小竞争窗口自适应调整的退避算法(Minimum Contention Window Self-adaptive Adjusting, MCWSA)。该算法的思想是每个站点根据网络中当前的时隙利用率和理论上最优时隙利用率进行比较，周期性动态调整自身的最小竞争窗口，以适应不同的网络拥塞状况。仿真表明，该算法提高了IEEE 802.11局域网在拥塞情况下的性能，在饱和吞吐量和时延上都有不同程度的改善。
- IEEE 802．11; 退避算法; 自适应调整; 时隙利用率; 最小竞争窗口
Abstract: A backoff algorithm based on Minimum Contention Window Self-adaptive Adjusting (MCWSA) is proposed in this paper. The idea of this algorithm is that every node in the network adjusts self minimum contention window periodically, according to the comparing result of the present slot utilization and the optimal value, to adopt the congestion status. Simulation result proves that MCWSA can enhance the IEEE 802.11 performance in saturation throughout and delay.

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