IMPROVED AODV BASED ON LINK QUALITY METRICS

The wireless interfaces in mobile ad-hoc networks (MANET) have limited transmission range; communication traffic is relayed over several intermediate nodes to ensure a communication link between two nodes. Since the destination is reached using multiple hops from the source, routing plays an important role in Ad hoc network reliability. Since the network is dynamic in nature, conventional routing protocol may not perform well during adverse conditions like poor link quality, high mobility. In this paper, a new MANET routing method based on Ad hoc On demand Distance Vector (AODV) and Ant Colony Optimization (ACO) is proposed for networks with varying levels of link quality. ACO is inspired from the biological behaviour of ants. Achievement of complex solutions with limited intelligence and individual capacity within these communities can be emulated in ad hoc networks. A new link quality metric is defined to enhance AODV routing algorithm so that it can handle link quality between nodes to evaluate routes.