Performance Enhancement of Ad-hoc On-demand Distance Vector Routing Protocol in MANETs using Multipath Approach

The Wireless technology is dominating current world of communications as it is found in most of the domains. Mobility is a key concept for wireless networking and to let the traffic pass across the network smoothly, the routing has to be quiet efficient. Mobile Ad hoc Network, as its name suggests are designed on fly for fulfilling a specific task within a specific boundary. In the domain of wireless ad hoc network, there must be an efficient routing mechanism to provide the correct and optimal route establishment and maintenance between a pair of nodes, so that messages may be delivered reliably and in a timely manner. There are many protocols available for doing the Ad hoc routing and selecting a proper candidate is totally based on the applications. We have analysed different routing protocols against several metrics through the simulations in Network Simulator – 2 (NS-2). Perfor mance parameters include Average end-to-end delay, Routing Overhead, Jitter Packet drops etc. In this work, we propose a Performance enhancement of Ad-hoc On-demand Distance Vector routing protocol in MANETs using multipath approach this mechanism setups multiple paths based on less hop count. It allows to store multiple paths based on threshold. At time of link failure, it will switch to next available path. To set up multiple path, we have used the information that we get in the RREQ packet and also send RREP packet to more than one paths. It reduces overhead of local route discovery at the time of link failure. And because of this End to End Delay and Drop Ratio decreases. routing protocol including our scheme and we compare it with the basic AODV and multipath extension of AODV-AOMDV routing