一种改进的基于Smith原则的计算机高速通信网络的拥塞控制方案

1.引言 ATM网络是一类虚拟的电路交换网络,它融入了电路交换技术和包交换技术。在这两个系统融入以前它们是独立的,若要互相通信必须获得彼此的通信参数才能建立虚拟连接。而ATM网络通过存储技术和统计复用来共享网络资源,网络资源的共享使得通信费用大大减少。ATM是以定长的信元(cell)作为高速通信信息的载体,它具有高速、低比特错误率、动态分配带宽和高复合能力的优点,这些使得它非常适宜于需要保证服务质量(Quality of Service,QoS)的多媒体数据流。由于多媒体业务流的特性,常引起网络拥塞并降低服务的质量。因此必须采取一定的流量管理控制机制来避免网络的拥塞。

An Improved Congestion Control Scheme for High-Speed Computer Communication Networks by Using Smith's Principle

In this paper, classical control theory and Smith's principle are applied in designing a class of effective and simple congestion control schemes for high-speed computer communication networks. Mathematical analyses and simulations verify the efficiency of the congestion control schemes. The proposed congestion control laws guarantee full utilization of network links and stability of network queues so that the network has no data loss in a general network topology and traffic scenario. The approach has some advantage over the usual Smith's principle based congestion control scheme; it can be applied to those networks that may have smaller bottleneck capacity. Theoretical analyses and simulation results show good performance of networks if implemented by the congestion controllers, which are designed on the basis of the improved Smith principle.