中文摘要：

降低路由控制开销是MANET网络组播路由协议节省节点能量，提高带宽利用率的关键因素之一。本文研究了组播路径近邻节点对路由维护的作用以及链路的连通性，分别提出了一个新的k一泛洪约束算法和一个混合泛洪模式。基于k一泛洪约束算法和混合泛洪模式，提出一个新的按需组播路由协议ODMRP—CF，ODMRP．CF协议通过选择k一路由近邻节点转发泛洪分组来提高泛洪效率。ODMRP—CF协议不仅保持了ODMRP协议所具有的简单，对节点移动鲁棒性好的优点，而且有效地降低了ODMRP—CF协议的控制开销。

英文摘要：

In Mobile Ad hoc Networks （MANET）, it is one of the dominant factors saving a node＇s battery power and improving the efficiency of network bandwidth to reduce the routing overhead for a multicast routing protocol. The roles of some nodes near the paths in the maintenance of multicasting paths and the link connectivity are studied, a local flooding algorithm, namely k-constrained flooding algorithm, and a mixed flooding pattern are presented, and then a new multicast routing protocol, which is called the On-Demand Multicast Routing Protocol with Constrained Flooding （ODMRP-CF）, is also proposed in this paper. In ODMRP-CF, only k-nodes near the paths can be selected to forward the control packets to enhance the flooding efficiency. Simulation results show that the ODMRP-CF can reduce significantly control overhead while keeping similar packet delivery ratio to ODMRP.