扩展NS2用于主动分层多播仿真

An Extension of the NS Simulator for Active Layered Multicast

分析网络仿真器NS2[3]进行多播仿真的内部机制,论述多播协议PIM-DM的仿真实现。给出一种对NS2进行扩展的方法,通过增加主动分类器、主动代理、修改复制器使之能用于主动分层多播协议的仿真。该扩展具有如下特点:分层数据以及信令数据均通过主动数据包传输,不同层数据在同一组播组发送。

In this paper, a approach of multicast simulation in network simulator NS2 is analyzed,The implementation of PIM-DM protocol is discussed. A method to extend NS2 by adding code to active classifier, active agent and replicator is proposed so that NS2 can be used for active network layered multicast simulation. In this extension, the different layer data are encapsulated in only one multicast group.