一种竞争窗口自适应调整算法设计

Design of Self-adaptive Adjusting Algorithm for Contention Window

在传统的增强型分布式信道接入机制中,每个接入类别队列的主要参数都是静态的,并没有考虑到无线网络的状态。为此,利用时隙利用率来判断网络负载程度,参考每个AC队列的冲突率来动态调整最小竞争窗口和最大竞争窗口。仿真实验结果表明,该算法在保证实时业务要求的同时,能降低延迟,提高无线局域网吞吐量。

The main problem of the original Enhanced Distribution Channel Access（EDCA） is that the values of the main parameters of each Access Category（AC） queue are static and do not take into account wireless channel conditions.In this paper,every station in the network tuned Contention Window（CW） dynamically,according to the current network load adopting the slot utilization to evaluate,and adjusts minimum CW and maximum contention window by the collision rate in per AC queue,thus improves the performance of the network.Simulation results show that this algorithm can ensure the requirement of the real-time traffic,reduce effectively the delay and increase significantly the throughput of wireless LAN.