【摘要】 针对路由器主动队列调度算法WFQ(Weighted Fair Queuing)在链路拥塞时无法保证低速率实时业务的QoS(Quality of Service)要求以及实时性业务突发时会导致延迟抖动加大的问题,提出了一种队长和权值调整的算法LW-WFQ。该算法增加了自适应队列管理器和应对突发机制,减少了分组的排队等待时间。最后以NS2为平台,对WFQ及LW-WFQ算法的性能进行大量的仿真对比分析,调节并确定合适的参数,实验结果证明LW-WFQ算法在延迟、抖动等方面的性能有一定程度的提高。更多还原

【Abstract】 The router active Queue scheduling algorithm WFQ(Weighted Fair Queuing)can no more guarantee the QoS requirements of low-rate real-time traffic and a real-time burst will lead to increased delay and jitter problem as congestion occurs,so an algorithm named LW-WFQ(WFQ Base on Length and Weight)was proposed.The algorithm adds an adaptive queue manager and mechanisms which can deal with burst to reduce the waiting time of packets.NS2 is last used as a platform to compare a great deal of performance simulation of WFQ and LW-WFQ,and then we regulated and confirmed the parameters to prove that LW-WFQ had certainly improved the performance of delay and jitter.更多还原