动态带宽分配对主动队列管理性能的影响

The Effect of Dynamic Bandwidth Allocation on Active Queue Management Performance

随着Internet的蓬勃发展以及多媒体业务流的出现,传统的ARED(Adaptive Ran-dom Early Drop)算法暴露出其不完备性.本文在区分服务体系架构下研究了动态带宽分配对主动队列管理(AQM)算法性能的影响,提出了EARED(Enhanced Adaptive RED)算法,重点讨论列服务速率的动态变化对RED性能的影响,通过估计队列服务的速率,减小了瞬时队列长度与平均队列长度的振荡幅度,从而减小了分组的时延抖动,并保持丢失率的相对稳定.最后通过仿真验证了算法的有效性.

In order to solve the issue of the incompleteness of the Active RED algorithm for multimedia streaming service in Internet, an algorithm called EARED（Enhanced Adaptive RED） is proposed on the basis of the research on the effect of dynamic bandwidth allocation on the performance of Active Queue Management under differentiated services Model. Effect of dynamic bandwidth allocation on the performance of RED is mainly discussed. The algorithm decreases the oscillation of instantaneous and average queue length, thereby reducing the packet delay jitter and keeping the relative stability of loss rate. Finally, simulation validation is conducted.