摘要： 尽管IP组播是一种有效的多点通信方式,但在Internet范围内部署IP组播有着许多障碍。应用层组播可以在网络层不支持组播的情况下快速提供组播服务。提出了一种基于加权选择函数的分布式应用层组播路由算法,它在构造组播树时,能在尽量减少局部的三角路由同时兼顾节点之间的邻近性。模拟实验结果证明了该方案的有效性。

关键词: 应用层组播, 覆盖网络, 服务质量

Abstract: Though the efficiency of IP-based multicast is undeniable,the deployment of IP multicast has met many difficulties.Application layer multicast (ALM) is an alternative which enables rapid deployment of multicast applications in Internet.This paper proposes a distributed application layer multicast routing algorithm based on weighted selection function.It tries to avoid local triangle routing problem and takes proximity into consideration when constructing a multicast tree.Simulation results show it is a practical theme.

中图分类号: 

• TP393.04