Deploying power-aware on-demand (PAOD) schemes over routing protocols of mobile wireless ad hoc networks: Research Articles

Abstract

A mobile ad hoc network (MANET) is an autonomous collection of mobile nodes that communicate over relatively bandwidth-constrained wireless links. MANETs need efficient algorithms to determine network connectivity, link scheduling, and routing. An important issue in network routing for MANETs is to conserve power while still achieve a high packet success rate. Traditional MANET routing protocols do not count for such concern. They all assume working with unlimited power reservoirs. Several ideas have been proposed for adding power-awareness capabilities to ad hoc networks. Most of these proposals tackle the issue by either proposing new power-aware routing protocols or modifying existing routing protocols through the deployment of power information as cost functions. None of them deal with counter-measures that ought to be taken when nodes suffer from low power reserves and are subject to shut down in mid of normal network operations.In this paper, power-awareness is added to a well-known traditional routing protocol, the ad hoc on-demand distance vector (AODV) routing protocol. The original algorithm is modified to deal with situations in which nodes experience low power reserves. Two schemes are proposed and compared with the original protocol using different performance metrics such as average end-to-end delays, transmission success rates, and throughputs. These schemes provide capabilities for AODV to deal with situations in which operating nodes have almost consumed their power reserves. Copyright © 2005 John Wiley & Sons, Ltd.