An Enriched Reactive Routing Protocol-AODV for Mobile Ad hoc Networks

Mobile ad hoc network (MANET) is an emerging trend and it has to face many challenges and issues. An ad hoc network is a collection of mobile nodes that dynamically form a temporary network, without the use of existing infrastructure. When two nodes are not within the radio range of one another, they use intermediate nodes to route packets for them. Routing in MANET is a challenging problem which draws researcher‟s vision, due to nodes mobility, dynamic topology, frequent link breakage, limitation of nodes (memory, battery, bandwidth, and processing power), and lack of central point like base stations or servers. So by analyzing different ad hoc routing protocols based on the metric throughput, packet delivery ratio, end to end delay which may yield a solution to the challenges in the ad hoc routing in different situations. The mobility of nodes and instability of the wireless environment may result in link breaks between neighboring nodes, even causes the route to be invalid. This paper focuses on the mobility of the source node and intermediate node which may result link failure. If a source node moves, it is able to reinitiate the Route Discovery Protocol (RDP) to find a new route to the destination using path updation. For intermediate node link break a Local Repair Procedure is used to update the path. This main objective of this paper is new path updation and resolving link failure in AODV. Computer simulation using NS2 simulator on Linux operating system shows the behavior and performance enriched in AODV routing protocol based on the metrics.