Mobility Adaptive Ad-Hoc on Demand Distance Vector Routing Protocol in MANET

Abstract

A Mobile Ad-Hoc Network (MANET) is an infrastructure-less, self-organized and multi-hop network with a rapidly changing topology causing the wireless links to be broken at any time. Routing in such a network is challenging due to the mobility of its nodes and the challenge becomes more difficult when the network size increases. In order to alleviate the node mobility problems which cause frequent link failures between source and destination nodes and data packets loss during transmission in MANETs, we propose a new routing protocol called MAD-AODV (Mobility Adaptive Ad-hoc On Demand Distance Vector) based on the well-known Ad-hoc On Demand Distance Vector (AODV) protocol. The proposed MAD-AODV protocol is capable of periodically predicting mobility, and then making useful routing decisions accordingly. The MAD-AODV protocol follows the basic AODV process, but it includes some modifications to adapt to the dynamic node mobility. The basic AODV consists of path discovery, route table management, path maintenance, and local connectivity management. The MAD-AODV modifies the techniques involved in basic AODV excluding path discovery. The work is implemented and simulated on NS-2. The simulation results have shown improvements in packet delivery ratio and throughput, along with a decrease in end-to-end delay, packet loss and communication overhead. The proposed MAD-AODV provides more consistent and reliable data transfer compared to general AODV.