Abstract: Ad-hoc On-demand Distance Vector(AODV) provides scalable and effective solution for packet routing in mobile wireless ad hoc networks, however, the path generated by this protocol may derivate far from optimal because of inconsideration of node power, load unbalance and link state, resulting that energy consumption of each nods is imbalanced and reducing the lifetime of whole networks. Based on the basic AODV protocols, an improved protocol was presented. When the protocol is selecting a route, node power, load balance and link state between nods are all considered.The proposed protocol can improve the network performance. hhrough the simulation on NS2，it is confirmed that the improved AODV protocol is more energy-efficient than AODV and has higher data package delivery rate, lower end to end delay and lower route load.

Key words: On demand distance vector routing, Mobile ad hoc networks, Link state, Energy efficient routing