聚合组播及组-树映射算法的研究

Research on Aggregated Multicast and Group-Tree Mapping Algorithm

对一种新颖的减少组播状态的方法 -聚合组播进行了研究 ,它使多个组播组共享同一棵分布树 ,从而在损耗一定带宽的情况下 ,减少了组播状态和核心路由器上的树管理开销 .同时提出了一种组 -树映射算法 ,该算法将组播组指定到具有可控带宽的分布树上 ,在牺牲带宽的基础上 。

A deep research on aggregated multicast, which is a novel approach to reduce multicast state, has been given in this paper. The key idea is that multicast groups forced to share a single distribution tree. At the expense of some bandwidth wastage, this approach can reduce multicast state and tree management overhead at core routers. In addition, we propose a group tree mapping algorithm to assign multicast groups to distribution tree, with controllable bandwidth overhead. This algorithm can greatly reduce extra tunneling and extension overhead on the base of bandwidth wastage.