指定信源域间组播SSM的研究  

Study of Source-Specific Interdomain Multicast

作　　者：李小勇[1] 张卫[2] 

机构地区：[1]天水师范学院计算机系,甘肃天水741000 [2]华东师范大学计算机系,上海200062

出　　处：《微机发展》2004年第11期80-83,共4页Microcomputer Development

摘　　要：指定信源域间组播(SSM)主要是为了解决域间组播地址变化问题而提出的,它有效地解决了ASM域间组播路由的复杂性,并且有更好的会话完整性和安全性,但仍然面临严重的状态可伸缩性问题,网络中大量的活动组将需要路由器巨大的存储和处理开销,可伸缩性也是SSM组播所面临的巨大瓶颈之一,限制了它的发展。文章分析了SSM实现中的关键技术和实现方案,以及对SSM性能的评价和SSM当前的发展。在此基础上就SSM中状态的可伸缩性问题,提出了解决思路,并描述了其工作原理。Source-Specific Multicast (SSM) is an alternative to the traditional Any-Source Multicast (ASM), which effectively avoids many of the complexities of interdomain multicast routing and provides additional benefits in terms of session integrity and security. But SSM still confronts the serious state scalability problem.The amount of multicast state in a network scales with the number of active multicast groups.Scalability of multicast is to be a major issue facing SSM. The paper analyzes the key technologies of SSM and studies a solution to implement SSM, discusses its appraisement and its development. Furthermore,about the state scalability problem,defines a solution,and describes its principles.

关 键 词：域间组播 任意源组播 SSM 聚集组播 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]