ATM网络中一种新的动态优先队列控制方案  

An New Dynamic Priority Queue Scheme for Bursty Traffic Control in ATM Networks

作　　者：席在芳[1] 唐志军[1] 邬书跃[1] 

机构地区：[1]湖南科技大学信息与电气工程学院,湖南湘潭411201

出　　处：《计算机仿真》2008年第5期132-136,179,共6页Computer Simulation

基　　金：湖南省教育厅资助科研项目(06C314)

摘　　要：ATM网络中支持的突发业务如语音、视频和图像等要求提供不同的服务质量。为了满足这些突发业务的各种服务质量要求,主要以马尔可夫到达过程来模拟ATM网络中的两类具有不同QoS要求的突发业务流,并为各种不同业务提供QoS保证。通过使用嵌入马尔可夫链和灵活的辅助措施,获得用户在离开时刻各类业务的队列长度,并可以推导出任意时刻下的业务队列长度,导出延迟和损耗等性能参数。并对所提出的方案进行了仿真分析,结果表明该方案完全可以满足ATM网络中突发业务的服务质量。Bursty traffic such as voice, video and images is supported in ATM networks and requires different quality of service（QoS）. To meet the various QoS requirements and QoS guarantees of bursty traffic, a dynamic priority queue with two types of traffic is proposed and analysed by Markovian arrival process. Using the embodied Markov chain, performance measures such as loss, the length or queue and delay are derived. Some numerical examples are presented to show the effects of the scheduling policy. It＇ s better for meeting the QoS requirements of bursty traffic in ATM networks by simulating and analyzing the scheme.

关 键 词：突发业务 动态 优先队列 马尔可夫链 方案 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]