ATM 广域网预测式流量控制方案  

A Predictive Flow Control Scheme for Wide Area Networks

作　　者：戚文芽[1] 程时昕[1] 

机构地区：[1]东南大学移动通信国家重点实验室

出　　处：《东南大学学报（自然科学版）》1998年第4期19-23,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金

摘　　要：针对ＡＴＭ广域网的长时延特点，提出了一种预测式流量控制方案，通过预测各交换节点非受控业务流所占用的带宽，对各链路可获得带宽进行预测式分配；预测式方案结合本文作者提出的集中式流量控制机制，保证了带宽分配的公平性和链路利用的高效性；本文还在ＶＢＲ＋ＡＢＲ业务综合传输的情形下，进行了预测式流量控制方案的计算机仿真，仿真结果表明，本文的预测式算法具有带宽分配的公平性和链路利用的高效性，交换节点处缓冲队列很短．We propose a predictive flow control scheme for ATM wide area networks in the presence of un controlled traffic and available bit rate (ABR) traffic . In the nth frame,the amount of the bandwidth consumed by future un controlled traffic is predicted by each switch. The amount of the bandwidth for future ABR traffic is thus obtained and pre allocated to the ABR connections. Fairness and efficiency is guaranteed by using the so called synchronous flow control policy (Synchronous flow control scheme using Explicit Rate indications SER,proposed by the same author). The proposed scheme is investigated in the presence of (VBR+ABR) integrated traffic in our simulations.Numerical results show that the predictive SER scheme is fair and efficient in bandwidth allocation.Queues at switches are very short.

关 键 词：ATM 广域网 ABR流量控制 

分 类 号：TN913.24[电子电信—通信与信息系统]