基于接口格式的稀疏组播转发状态压缩方案  

Forwarding State Reduction Scheme Based on Interface Format for Sparse Mode Multicast

作　　者：黄奎[1] 吴亦川[1] 郑健平[1] 吴志美[1] 

机构地区：[1]中国科学院软件研究所多媒体通信中心

出　　处：《计算机研究与发展》2005年第9期1564-1570,共7页Journal of Computer Research and Development

基　　金：国家自然科学基金项目(60272078)~~

摘　　要：组播转发状态随组播组个数线性增长导致组播路由协议的扩展性较差.分析了已有的用于稀疏模式组播的转发状态组内压缩方案存在的问题,提出了一个新的压缩方案.该方案根据组播树上分支路由器的位置和个数,动态调整组播转发表项中各个接口的格式,进一步减少了转发状态占用的存储空间.Forwarding state proportional to the number of multicast groups may cause the scalability problem of multicast routing protocols. Existing intra-group forwarding state reduction approaches for sparse mode multicast, which aim to remove forwarding states at non-branching routers, are analyzed, and some problems appearing in these schemes are presented. A new forwarding state reduction scheme is proposed, which reduces storage requirement of multicast forwarding state by dynamically modifying the format of each interface in the multicast forwarding table entries according to the location and number of branching points on the multicast tree.

关 键 词：组播 稀疏模式 转发状态压缩 接口格式 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]