携带虚拟队列长度信息的ABR业务流量控制算法

An ABR flow Control Scheme with Information of Virtual Queue Length

本文提出了一种新的基于速率检测拥塞的A BR流量控制算法--E-EFCI,它的基本思想是在基于速率检测拥塞的基础上扩展EFCI的功能,使其不仅反映网络阻塞状况,而且还反映网络排队状况。在交换机中通过虚拟队列的长度设置EFCI来传递网络的排队信息。仿真结果表明,本文提出的算法比基本EFCI算法具有更好的控制行为,减小了A CR和排队长度的振荡幅度,提高了链路、缓存利用率,加快拥塞解除,并具有较高的性能价格比。

In this paper we present a new ABR flow control algorithm based on detect the congestion by cell speed-E-EFCI(Extend-Explicit Forward Congestion Indication). The main idea of this algorithm is to extend EFCI's function based on detect the congestion by cell speed and make it not only indicate the congestion status but also indicate the queue status. The transfer of queue length information is implemented by setting EFCI according to the virtual queue length of the switch. The result of simulation indicates that the new algorithm has better real-time control ability than basic EFCI algorithm. It has lower oscillation amplitude of ACR and queue length , higher link,buffer utilization rate , faster relieve congestion and better cost/ performance.