一种组播QOS测量与控制方法的研究创新.PDFVIP

2011 东南大学校庆研究生学术报告会 一种组播QOS 测量与控制方法的研究 1,2 1,2 杨五一 ，曹争 （1.东南大学计算机科学与工程学院，南京， 2 11189；2.江苏省计算机网络技术重点实验室，南京，2 11189 ） 摘 要：组播技术是一种一对多或者多点多传输技术，相对于单播传输，组播技术有效地解决了单点发送，多点接收的 问题，实现了网络中点到多点的高效数据传送，能够大量节约网络带宽，降低网络负载。组播技术的优点使得其在日益流 行的流媒 业务中得到了广泛的应用，如多媒 新闻发布，IPTV ，实时视频会议等诸多互联网信息服务都用到了组播技 术。而这些应用中都需要网络中的结点对传输的组播流提供一定的QOS 服务来保证业务需要。传统组播 QOS 控制主要 通过接收端反馈信息来获取从组播源至接收端链路状态但无法定位出现问题的中间结点或链路，因而实现的QOS 控制并 不高效，有时候并不利于问题的解决。本文主要研究了一种组播QOS 测量方法，利用该方法可以定位链路中出现故障的 结点，从而对该结点采取有效的控制策略，以满足业务需求。 关键词：组播；QOS 测量；QOS 控制；结点 The Research of Multicast QOS Measurement and Control Method Yang Wuyi1,2 ，Cao Zheng1,2 ( 1.School of Computer Science and Engineering, Southeast University, Nanjing, 2 11189; 2.Jiangsu Provincial Key Laboratory of Computer Network Technology;Nanjing,2 11189) Abstract: Multicast technology is a one to many or more multi-transmission technology, as opposed to the unicast transmission, multicast technology can effectively solves the problems of single point sending and many point receiving .That can transfer data efficiently, can save a lot of network bandwidth and reduce network loads. The advantage of multicast technology makes it increasingly popular in the media business, such as the multimedia news release, IPTV, real-time video conference and many other Internet information services .These applications require the network to provide multicast QOS to ensure the business needs. Traditional QOS control is mainly through the feedback from the multicast receivers .However,this way can not locate the problematic node or link, therefore the QOS control is not effective.This paper studies a multicast QOS measurement methods that can locate the pr