IEEE 802.11无线通讯协议的建模与性能分析  

Modeling and Performance Analysis of IEEE 802.11 Wireless Communication Protocol

作　　者：黄樟钦[1] 王治强[1] 侯义斌[1] 方林波[1] 张有康[1] 

机构地区：[1]北京工业大学嵌入式软件与系统研究所,北京100022

出　　处：《系统仿真学报》2009年第2期524-529,共6页Journal of System Simulation

基　　金：国家自然科学基金(90407017;60773186);北京市教委面上项目(KM200710005018)

摘　　要：为了系统分析IEEE 802.11无线通讯协议的性能,基于POOSL语言建立了IEEE 802.11协议的性能抽象模型,对adhoc网络和带有AP的WLAN两种场景下协议的性能进行了定性和定量地分析。在建模过程中,对协议的机制进行了合理的抽象,重点解决了无线信道的仿真等问题,准确模拟了DCF的两种工作方式(基本方式和RTS/CTS)。通过模型模拟执行的结果,分析了相关参数(站点个数、竞争窗口大小、帧的长度)对协议性能指标(有效吞吐量、平均延时和上下行吞吐量公平性)的影响,并得到了不同站点数目情况下最佳的CWmin值等结果。In order to analyze the performance of IEEE 802.11 wireless communication protocol, a performance abstract model of lEEE 802.11 protocol was built based on POOSL language and the performance was analyzed qualitatively and quantificationally in ad hoc network and WLAN with AP. During modeling, the protocol was abstracted rationally. Wireless channel was successfully simulated and the two accessing methods of DCF （basic and RTS/CTS） were simulated accurately. By simulating, the effects of related parameters （the number of STAs, CWmin and frame size） on performance of the protocol （valid throughput, average delay and the fairness of upload and download throughput） were analyzed and the optimist values of the CWmin were got.

关 键 词：IEEE 802.11 性能分析 POOSL 建模 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]