文档介绍：无线传感网中退避算法多负载状况下的退避窗口最优设定???马纯, 尹小燕, 房鼎益, 陈昊, 韦泽鹏, 陈晓江(西北大学信息科学与技术学院,陕西西安710127) 通讯作者: 尹小燕,E-mail: scxiaoyanyin@ The optimal settingof collision window in Back-off algorithm in WSN Ma chun, Yin Xiaoyan, Fang Dingyi, Chen Hao, Wei Zepeng, Chen Xiaojiang ( School of Information Science and Technology, Northwest University, 710127, China) + Corresponding author: Yin Xiaoyan, Phn +86-189-9185-9098, E-mail: scxiaoyanyin@ Abstract:The parameter setting of the Back-off algorithm especiallythe collision window influence the performance of the wireless work. Considering the different loading region which means the ratio of busy time,this paper provide the MNLBA (Multi-node-loading Back-off Algorithm),which use the optimizationalgorithmto control the optimal length of the collision window to try to reach the maximum throughput value. The simulationprovides pare performance result with SBA algorithm of the throughput and the delay in wireless work. The simulation result showsthat the MNLBA could achieve more throughout about 5%-10% than SBA algorithm. Key words: Wireless work; Back-off Algorithm; Collision Window; Throughput 摘要: 本文针对IEEE DCF的退避机制做了一定的总结,在退避算法的参数设定以及退避窗口的大小取值上也有不同的讨论。而着重依据网络的吞吐量模型,给出了基于不同占空比(节点一段时间内的忙碌状态时间与节点空闲状态时间的比值)的退避窗口设定算法MNLBA(Multi-node-loading Back-off Algorithm:多?Supported bytheNationalKeyTechnologyResearchandDevelopmentProgramoftheMinistryo