【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。更多还原

【Abstract】 In order to analyze the performance of IEEE 802.11 wireless communication protocol, a performance abstract model of IEEE 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.更多还原