基于延时补偿结构的大时滞网络拥塞控制

CONGESTION CONTROL OF LARGE DELAY NETWORKS BASED ON DELAY COMPENSATION STRUCTURE

研究和分析了几种典型的主动队列管理AQM(Active Queue Management)算法在大时滞网络下的稳定性、性能及响应速度,发现如RED、PI等AQM算法在大时滞网络环境下队列出现剧烈的振荡和空队列增多,这些现象直接导致链路利用率降低和丢包率增大。针对上述的大时滞网络,将具有正反馈的延时补偿结构用于TCP/AQM拥塞窗口动态模型,实现对延时的补偿,仿真表明采用该控制结构提高了网络的性能。

The stability,performance and the response speed of typical Active Queue Management（AQM） algorithms in large delay network are studied and analyzed.It is found that AQM algorithms such as RED,PI etc,perform serious oscillation and increased empty queue in large delay network,and the phenomena directly induce the decrease in link utilization and the increase in data package losing.In this paper,a time-lapse compensatory structure with positive feedback is applied to TCP/AQM congestion window dynamic model to realize time-lapse compensation.Simulation illustrates that the proposed control structure improves the performance of the network.