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多速率最优竞争窗口的WLAN退避算法
引用本文:胡国柱,王吉军,杨凯. 多速率最优竞争窗口的WLAN退避算法[J]. 计算机工程与应用, 2009, 45(32): 101-103. DOI: 10.3778/j.issn.1002-8331.2009.32.032
作者姓名:胡国柱  王吉军  杨凯
作者单位:辽宁省智能信息处理重点实验室,辽宁,大连,116622;辽宁省智能信息处理重点实验室,辽宁,大连,116622;辽宁省智能信息处理重点实验室,辽宁,大连,116622
基金项目:辽宁省教育厅科研项目 
摘    要:在对原有的IEEE 802.11 DCF多速率退避算法研究的基础上,提出了基于多速率的最优竞争窗口退避算法(Multi-rate Optimized Contention Window algorithm,MOCW)。该算法的核心思想是在多速率时间公平性的基础上,利用理论上的最优窗口值作为节点的初始窗口值,以此来减小多节点同时发送数据时的碰撞概率。仿真实验表明,该算法在饱和状态下,无论在时间公平性还是系统吞吐量的性能上都有所提高。

关 键 词:IEEE 802.11  分布式协调功能(DCF)  退避算法  最优竞争窗口  多速率
收稿时间:2008-06-27
修稿时间:2008-10-16 

Multi-rate optimized contention window backoff algorithm in WLAN
HU Guo-zhu,WANG Ji-jun,YANG Kai. Multi-rate optimized contention window backoff algorithm in WLAN[J]. Computer Engineering and Applications, 2009, 45(32): 101-103. DOI: 10.3778/j.issn.1002-8331.2009.32.032
Authors:HU Guo-zhu  WANG Ji-jun  YANG Kai
Affiliation:Liaoning Key Laboratory of Intelligent Information Processing,Dalian,Liaoning 116622,China
Abstract:This paper brings up a multi-rate optimized contention window algorithm after studying fore researches on multi-rate backoff algorithms in IEEE 802.11 DCF.The core of this algorithm is using the optimized contention window as nodes' initial contention window value based on time equity,in order to reduce the probability of data collision.The results of emulational experiments show that under saturated environment,the performance on time equity and system throughput is better than fore algorithms.
Keywords:IEEE 802.11  IEEE 802.11  Distributed Coordination Function(DCF)  backoff algorithm  optimized contention window  multi-rate
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