无线局域网中MAC层QoS算法

摘要

本文通过对IEEE802.11无线局域网的媒体接入控制（MAC：MediaAccessControl）层QoS（Quality of Service）支持技术进行研究,介绍了QoS参数,认识MAC接入机制DCF对提供QoS方面存在的局限性,提出了PCWA（Practical Contention Window Adjustment）算法,根据通信数据流状况模式（traffic pattern）,不断调整高优先级的最佳竞争窗口尺度,使整个系统实时业务获得最大的吞吐率和最小的等待时间。%Based on the IEEE802.11 wireless LAN media access control（MAC： MediaAccessControl） layer QoS（Quality of Service） support for technology research,describes the QoS parameters,understanding MAC DCF access mechanism to provide QoS on the limitations that exist,proposed PCWA（Practical Contention Window Adjustment） algorithm,according to the status of the communication data stream mode（traffic pattern）,continually adjust the high-priority measure of the best competition in the window,so that the whole system real-time business for maximum throughput and minimum latency.