Enhanced AODV — An energy efficient routing protocol for MANET

In MANET, all nodes are mobile in nature and having limited battery charge. Continuous change in position and connection degrades the battery charge of the nodes therefore it is necessary to save battery of those nodes which are having low battery so that the network lifetime can be long lasting. It is really very significant to increase lifetime of MANET. In order to enhance the lifetime of MANET; energy efficient techniques are required. In this paper, an energy efficient routing protocol viz. EERP is proposed for this purpose which is based on AODV. The protocol reduces the transmission power of a node which is part of an active route if next hop node is closer. The distance between two consecutive nodes is calculated based on RSS (received signal strength) from next hop during the route reply process. If the RSS is high, it implies that nodes are closer; as a result lesser transmission power will be required to send data. This in turn reduces battery consumption. The performance analysis of proposed protocol is analyzed using Qualnet 5.0.2 network simulator and it is compared with existing AODV routing protocol. Simulation results show that performance of EERP protocol is better than existing AODV.