Energy aware routing in ad hoc networks

The efficient node-energy utilization in mobile ad-hoc networks is essential as ad-hoc nodes operate with limited battery power. In ad-hoc networks, nodes perform the function of hosts as well as router as there is no existing infrastructure. Thus, failure of node in ad hoc network leads to loss of communication in the network. Maintaining alive node for longer time i.e. increasing network lifetime is one of the important factors in design of ad-hoc networks. The Ad hoc On-Demand Distance Vector (AODV) protocols perform routing based on the metric of least number of hops. To extend the lifetime of the ad-hoc networks, AODV energy aware routing protocol (AODVEA) is used which performs routing based on the metric of minimum remaining energy. In this paper, an efficient modified AODV (AODVM) routing protocol is proposed which performs routing based on the combination of least hops and minimum remaining energy. The performance of the proposed protocol has been examined and evaluated with the NS-2 simulator in terms of network lifetime, end-to-end delay and energy consumption. The proposed protocol gives less delay and energy consumption than AODVEA and improved lifetime than AODV.