Multipath location-aided routing method for ad hoc networks

Abstract

An ad hoc network is a collection of wireless mobile nodes dynamically forming a temporary network without the use of any existing network infrastructure or centralized administration. There are a number of routing schemes that have been proposed and several of these have been already extensively simulated or implemented as well. The primary applications of such networks have been in disaster relief operations, military use, conferencing, and environment sensing. There are many routing algorithms at present that use position information to make routing decisions at each node. Our goal is to utilize position information to provide more reliable as well as efficient routing for ad hoc network. We hence describe extensions to location-aided routing algorithm. We proposed replacing Location-Aided Routing (LAR) with multipath LAR (MLAR). We have implemented MLAR through simulation using ns-2 and study its efficiency, and other properties. We use random waypoint mobility and compare MLAR approach versus Ad Hoc On-Demand Distant Vector (AODV), Ad Hoc On-Demand Multipath Distant Vector (AOMDV) and LAR methods for a range of movement and communication models. Our simulation results demonstrate the performance benefits of MLAR over LAR and AODV in most movement scenarios. AOMDV delivers more packets than MLAR consistently, but does more frequent flooding of control packets and thus higher bandwidth usage than MLAR