MODIFIED AODV PROTOCOL FOR ENERGY EFFICIENT ROUTING IN MANET

Mobile ad Hoc network is a collection of wireless mobile nodes that works without any fixed infrastructure. Mobile nodes in MANET are featured with limited battery power & performance of routing protocol degrades if battery power of nodes gets exhausted. This issue not only affect lifetime of node but also its ability to forward packets. So in MA NET routing protocol should provide energy efficient multi - hop route between source & destination pair. AODV routing protocol prefers shortest path for route establishment. But this may lead to repeated selection of certain nodes which in turn exhaust batt ery power of such nodes faster than others. This will result in partitioning of network & will degrade performance of network. Thus routing protocol should consider residual energy of the nodes for route establishment. In modified AODV protocol first sour ce node will determine threshold value of energy i.e. the amount of energy required to complete the communication event without any link break. The packet structure of RREQ is modified & threshold value is inserted in it. Then we propose modified AODV alg orithm which aims to maximum utilization of battery power of nodes based on residual energy of nodes . Simulations are performed to study the performance of energy efficient modified AODV protocol using network simulator NS2. The simulation results show be tter performance in terms of throughput & average energy consumption as compared to existing AODV.