基于Choquet模糊积分的WLAN性能优化研究  

Enhancing Performance of WLAN by the Choquet Fuzzy Integral

作　　者：欧阳筱[1] 陈瑞[2] 曹雪虹[2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京工程学院通信工程学院,江苏南京211167

出　　处：《南京工程学院学报（自然科学版）》2011年第3期10-15,共6页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：江苏省自然科学基金资助项目(BK2009351)

摘　　要：用NS2仿真软件模拟无线局域网IEEE 802.11的MAC层协议,得到在不同MAC帧长、数据速率、最小竞争窗口大小和重传次数的情况下网络吞吐量的大小.利用基于Choquet积分的相关性模糊测度理论定量地测得帧长、数据速率、最小竞争窗口和重传次数以及它们的内在关系对网络吞吐量的影响程度,根据测度结果缩小参数集,并依此优化网络性能.仿真结果表明,只需调整参数集中的关键参数,就能有效提高网络的吞吐量.The MAC layer protocol of WLAN IEEE 802.11 is simulated by using NS2 simulation software and the network throughput is obtained under different MAC parameters, such as frame size, data rate, minimum contention window size and retransmission times. Fuzzy measure theory based on Choquet integral is applied to indentify which subset of these parameters produces the most significant effect on the performance metrics of interest, such as network throughput under the current system and network conditions. Then the set of parameters is narrowed according to the measurement result and network performance is optimized. The results show that this method can effectively improve the network throughput performance by only adjusting those key parameters in the narrowed set.

关 键 词：吞吐量 分布式协调功能 帧长 数据速率 竞争窗口 重传次数 

分 类 号：TP393.1[自动化与计算机技术—计算机应用技术]