携带队列长度信息的ABR业务扩展EFCI流量控制方案

An ABR Flow Control Extend EFCI Scheme with Information of Queue Length

基于EFCI的ABR流量控制算法E-EFCI的基本思想是扩展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,本算法比基本EFCI算法具有更好的控制行为,减小了ACR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 EFCI based ABR flow control algorithm——E-EFCI.The main idea of this algorithm is to extend EFCI's function,and makes 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 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.