Abstract: An Ad-hoc mobile network is a collection of wireless mobile hosts forming a temporary network without the aid of any established infrastructure or centralized administration hence lacking of permanent source of energy. To fulfill the energy requirement independent mobile devices are entirely dependent on battery power. One of the most widely used reactive protocols is AODV. In AODV there is two phases called route discovery and route maintenance. In the conventional AODV routing protocol, in the route Discovery phase, source node forward the route request message (RREQ) to find out path to the destination node. The intermediate nodes having less lifetime or energy also forward RREQ but after expiring their lifetime they are unable to send route reply message which results unnecessary RREQ rebroadcast, less packet delivery ratio (PDR) as well as throughput & more end to end delay. Solution to above problem is given in this paper, in optimize-AODV routing protocol the node does not forward RREQ unless there is sufficient energy (battery lifetime), and until the node density in its surrounding exceeds a particular threshold. The Result obtained using the network simulator NS-2 demonstrates how little changes in the principle of the AODV protocol can completely balance utilization among mobile devices of the network which increases the packet delivery ratio as well as increase the throughput.
Keywords: Mobile Network, AODV, Energy Efficient routing protocol, battery lifetime, QoS.