Ad Hoc网络组播路由协议的设计与仿真

针对现存的多种AdHoc组播路由协议的有效性差、控制开销大等问题，设计并实现了一种基于动态广播环的组播路由协议(DRMR)，确定了DRMR协议的实现框架，定义了各功能模块．在该协议中，组播路由建立和维护各个组成员广播环所构成的连通环图，当组成员广播环离开连通环图时，采用逐步扩大广播环的半径来恢复其连通性．仿真结果表明，DRMR协议具有较高的数据分组递交率和较低的路由维护开销，它的总体控制开销比基于需求的多播路由协议要节省18％以上，能满足AdHoc网络对组播应用的要求．

Design and Simulation of Multicast Routing Protocol for Ad Hoc Networks

Aiming at problems of low efficiency and high overhead of control packets in the existing multicast routing protocols for ad hoc networks, a novel multicast routing protocol for ad hoc networks called dynamic ring based multicast routing protocol (DRMR) was designed and realized. The implemented framework of DRMR was established and the function modules were defined. In DRMR, the multicast routing is carried out through establishing and maintaining the connected ring graph which is constructed from dynamic broadcast rings held by each member group. When the group member broadcast departs from the connected ring graph, the connectivity can be recovered by gradually extend the radius of broadcast ring. Simulation results show that DRMR has a high data packet delivery ratio and low routing (maintenance) cost, and its total control overhead is reduced more than 18% compared with the multicast routing protocols based on requirements. It can meet the requirements of the multicast applications in ad hoc networks.