关键词: 应用层组播, 组播协议, 加入组, 退出组

Abstract:

This paper proposed an application layer multicast protocol named SSALM (Single Source Application Layer Multicast). SSALM protocol adopted tree-first approach, which constructed source-specific multicast tree among group members and constructed overlay network based on the tree. Group members were able to join group and quit group independently. Besides, members were able to switch in the tree. This paper described the major algorithms and the modules of implementation of this protocol. Using this protocol can save network bandwidth effectively in the existing Internet environment.

Key words: application layer multicast, multicast protocol, join group, quit group