Abstract: In mobile ad hoc networks，the nodes are battery-operated，it is easy to lead to network partition since some node’s energy is exhausted.And the mobility of nodes may cause route failure that leads to route rediscovery，which can degrade the performance of networks.To solve this issue，this paper predicts the lifetime of each node in wireless ad hoc networks and also presents a method to get the mobility parameters of a node which represents the node’s moving speed by monitoring the change of the node’s link status periodically.Based on these，a new routing protocol EMRP by combining the prediction of the node mobility and residual energy state is presented.The simulation results show that EMRP can increase the packet delivery ratio and increase evidently the lifetime of the network.

Key words: mobile Ad hoc network, lifetime, mobility parameters

摘要： 移动Ad hoc网络中，节点采用电池一类的可耗尽能源来提供电源，很容易因某个节点能量耗完而导致网络分裂。同时，节点在网络中的不断移动可能引起路由失效，从而导致路由重建，降低网络的性能。针对这个问题，从节点能量消耗入手，通过对网络中各节点能量消耗速度的预测，并周期性地监控与节点相关的链路的变化情况，近似获得代表节点移动快慢的移动性参数，提出一种结合节点移动性和节点剩余能量状态预测的路由协议——EMRP。仿真表明EMRP能提高数据传送率，延长整个网络的生存时间，改善网络性能。

关键词: 移动Ad hoc网络, 节点生存时间, 移动性参数