电光与控制, 2013, 20 (6): 85, 网络出版: 2013-06-17
IEEE 802.11协议传输距离限制及改进研究
The Limit and Improvement of Communication Distance in IEEE 802.11 Protocol
摘要
针对现有802.11通信协议中主要的CSMA/CA协议最大通信距离仅为300 m，超过300 m后，随着距离的增加，系统的性能急剧下降的问题，分析了造成这种问题的原因，并提出根据距离的变化改变ACKtimeout这一方法，提高了CSMA/CA协议远距离传输的性能，用OPNET软件进行仿真。仿真表明: 在远距离通信时，提高了系统的吞吐量，减少了接入时延。
Abstract
The maximum communication distance of main CSMA/CA protocol in present 802.11 communication protocol is only 300 m;and the system performance declines dramatically with the increase of distance over 300 m.The cause for this problem was analyzedand a method of changing ACKtimeout in accordance with the variation of distance was providedwhich improved the performance of CSMA/CA protocol in long distance communication.Simulation was carried out with OPNET softwareand the results showed that in long distance communicationsystem throughput is improved and connected delay is reduced.
张锋, 向新, 杨宝强, 刘雄, 吴旭旭. IEEE 802.11协议传输距离限制及改进研究[J]. 电光与控制, 2013, 20(6): 85. ZHANG Feng, XIANG Xin, YANG Baoqiang, LIU Xiong, WU Xuxu. The Limit and Improvement of Communication Distance in IEEE 802.11 Protocol[J]. Electronics Optics & Control, 2013, 20(6): 85.
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