基于加权选择函数的应用层组播路由算法

A Weighted Selection Function-based Application Layer Multicast Routing Algorithm

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。

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.