Dynamic Route Maintenance Scheme for Aodv Routing Protocol Using Jointnodes

Abstract

Ad hoc On-demand Distance Vector (AODV) is one of the widely deployed routing protocol for mobile ad hoc network (MANET). Through route discovery process, AODV establishes a route timely for data transmission without prior knowledge of the network topology. However, how to maintain this route while data transmission is ongoing is a problem due to the mobility and the limited resource nature of the nodes in this type of network. Frequent changes in an ad-hoc network topology require a routing protocol, which is more adaptive to topological variations. This thesis proposes a dynamic route maintenance scheme which is more adaptive to the topological variations in MANET. In this route maintenance scheme, MANET benefits from a carefully selected neighbour, herein known as JointNode, to form an alternative link for the individual node-to-node links within a route in AODV routes maintenance phase. Nodes use the one-hop hello messages to build this neighbour knowledge. The scheme identifies a local JointNode as a backup link to dynamically resort to as an alternative or imperative options. Nodes can therefore configure an already established route to become a refined route dynamically without necessarily resorting to the route rediscovery process. The thesis demonstrates through network simulation using NS-2 that AODV routing protocol can benefit from the proposed route maintenance scheme. The simulation result shows a significant increase in the network throughput and packet delivery ratio and a decrease in both delay and nominal route overhead.