IEEE802.11 DCF退避机制的一种改进方法

An Improve Method of the Backoff Mechanism in IEEE802.11 DCF

针对DCF机制在工作站增多的情况下出现的服务质量下降的问题,通过对各站点发送数据帧时的竞争窗口值以及发生碰撞时采取的退避方式进行改进,优化了DCF方式下无线局域网的服务性能。OP-NET仿真结果表明,系统的吞吐量性能得到提高、延迟减小。

The problem that service quality declines as the number of workstation increased under DCF mechanism was improved by changing the value of Control Window(CW) in which work stations competed to send their data frame,and the backoff exponent when competitions happen.It optimizes the performances of WLAN under DCF mechanism.OPNET simulation shows that the throughput is raised and the delay is reduced.