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面向ABR服务的显式速率流量控制机制用于公平和合理地分配瓶颈链路可提供的带宽 ,保持与瓶颈链路连接的交换机缓冲区队列长度在所希望的程度 ,从而可以预防和控制ATM网络中的拥塞 .然而 ,设计有效的流量控制机制较为困难 ,这主要是由于网络中的动态参数 ,如可提供的链路带宽、业务量的并发以及ABR源目的之间距离等变化的影响 .对此 ,本文提出了一种面向ABR服务的模糊显式速率控制机制 ,该机制结构简单 ,鲁棒性强 .仿真实验表明 :该机制可以有效地避免网络拥塞 ,公平地分配链路带宽并且具有快速收敛、低振荡、高链路带宽利用率的特点
The explicit rate flow control mechanism for ABR services is used to fairly and rationally allocate the bandwidth available from the bottleneck link and maintain the length of the switch buffer queue connected to the bottleneck link to the extent that it is possible to prevent and control the ATM network However, it is difficult to design efficient flow control mechanisms due to the dynamic parameters in the network, such as the link bandwidth available, the concurrency of traffic, and the distance between ABR source destinations. This paper presents a fuzzy explicit rate control mechanism for ABR service, which has the advantages of simple structure and strong robustness.The simulation results show that this mechanism can effectively avoid network congestion, allocate link bandwidth fairly and have fast Convergence, low oscillation, high link bandwidth utilization characteristics