Enhanced energy efficient routing protocol for MANET by modifying route discovery and selection process of existing MAODV

Abstract

Mobile ad hoc network is a collection of the wireless mobile hosts without fixed infrastructure and centralized administration. Communication in MANET is done via multi-hop paths and it is mainly constrained with bandwidth, security and limited energy resource. From those constraints energy conservation is a major issue in the ad hoc networks for saving network lifetime with lim ited battery power. In Multipath Adhoc Ondemand Distance Vector protocol, the route discovery mechanism utilizes a simple flooding method, where a mobile node massively rebroadcasts received route request (RREQ) packets until a route to the destination is established. This may cause more retransmissions and excessive energy consumption.To solve this problem in the proposed work we designed a routing protocol that discovers route by calculating the required energy of a node to reach its neighbor node and compared it with its residual energy for deciding whether a node can forward the RREQ or not. After discovering routes we can select the best optimal path by considering route cost function value. The main aim of this work is to design an energy efficient routing mechanism based on existing Multi-path adhoc on demand distance vector routing protocol. This method can significantly reduce the energy consumed during route discovery and selection operation. We simulated our proposed algorithm using the NS2 simulator and evaluated the performance of the proposed EEMAODV with the existing MAODV protocol in terms of average energy consumption and packet delivery ratio. Simulation results have proved that the proposed protocol is more energy efficient than the existing MAODV protocol in terms of energy consumption and also provides a higher packet delivery ratio than the existing MAODV protocol.