应用层语义可靠的自适应多播  

An Application-Level Semantic Reliable Multicast Architecture for the Internet

作　　者：谭焜[1] 史元春[1] 廖春元[1] 徐光祐[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《软件学报》2002年第4期545-551,共7页Journal of Software

基　　金：985清华大学学科规划重点项目(985TH-22-06)

摘　　要：Internet上的可靠多播具有很大的应用前景,但是同时也面临着挑战,主要是因为Internet的异构性以及IPMulticast仍不能广域内得以实现.提出了一种应用层语义可靠的自适应多播体系结构（application semanticsreliable multicast,简称ASRM）.ASRM不以IP Multicast为基础,而是采用一种混合IP单播和多播的方法来实现多点数据通信.ASRM采用一种简单、自然,且具有更好的伸缩性的方法来命名多播会话,并可以在转发过程中,根据变换模型、变换规则和用户意愿进行自适应的数据传输,从而解决异构性问题.ASRM适用于广域范围内的小规模可靠多播应用.Reliable multicast is a useful network service but challenged by the Internet heterogeneity and the nonsupport of IP Multicast in wide-area Internet. In this paper, an application-level semantic reliable multicast (ASRM) is presented, which realizes application-level semantic reliable multicast data delivery. ASRM uses a hybrid way that combines unicast delivery with multicast delivery instead of using global IP multicast as the basis. ASRM provides a simpler and more natural way to name and locate the sessions. During the data forwarding, ASRM can use application-defined semantics to transcode content according to the transcoding models, rules and user' preferences. Thus, it can cope with the heterogeneity problem very well. ASRM is suitable for wide-area, limited scale, reliable multicast applications.

关 键 词：异构性 自适应多播 应用层语义可靠 计算机网络 INTERNET 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]