关键词: 应用层多播 覆盖网络 生成树 冗余虚拟链路

Abstract:

The application layer muhicast protocol sends packets to group members by the spanning tree. When one or more nodes fail, the downriver nodes cannot receive packets, which makes the system become fragile. The paper reduces the number of nodes which cannot receive group packets by adding redundant virt ual links between the nodes of the tree. Experiment shows that adding the links can greatly alleviate the loss caused by node failures.

Key words: application layer multicast, overlay, sparming, tree;redundant virtual links