无线局域网的公平接入控制算法

Feedback based on QoS control mechanism for wireless network

在IEEE802.11无线局域网中,站点的比特率可以依据链路质量进行调整。如果一个站点由于比特率的降低而长时间占用无线信道,将会影响其它站点对无线信道的使用,从而造成网络性能的下降。为了解决这一问题,提出了一种无线局域网中的公平接入控制算法,此算法根据特定的策略来分配站点的接入时间。经过仿真实验和结果分析,证明了这个公平接入控制算法在避免无线局域网性能的下降,提高服务质量方面的优点。

The data rate of a host is adapted in accordance with the quality of the link in a IEEE 802.11 wireless local area network.When one host captures the wireless channel for a long time because its bit rate is low,it will penalize other hosts that use the higher rate,inciting a performance overall degradation.The fair access control algorithm,which shares the access time based on special policies for each host is proposed.The simulation experimental results show that the fair access control algorithm can satisfy need for avoiding the performance degradation and improving the quality of service in wireless local area network.