关键词: 无线自组织网络, 组播, 路由度量, 路由协议, 网络仿真

Abstract: The multicast tree in MAODV is reconstructed frequently because of the nodes mobility, making the cost of routing and delay of transmission increase significantly. The neighbor change ratio based stable path selection method was proposed to overcome the shortcomings. And a new neighbor change ratio calculation method was put forward, which did not need to send Hello messages timely. Based on this new method, a stable path based MAODV (SP-MAODV) multicast routing protocol was given with a stable path selection and less hops. The simulation results on data packet transmission rate, routing overhead, average end-to-end delay and delay jitter show that the new protocol reduces interruption probability of the path and improves performance of the protocol.

Key words: wireless Ad Hoc network, multicast, route metrics, routing protocol, network simulation