IJSRP, Volume 2, Issue 8, August 2012 Edition [ISSN 2250-3153]
Communication takes place by routing protocols in effective and efficient manner in wireless network. Efficient protocols are used to forward data packets without much packet loss. Mobile Ad hoc Network (MANET) is a collection of mobile devices, a self configured, multi-hop network. Simulating Tool NS-2 is an outstanding network simulating tool among all the others. Ad hoc on Demand Distance Vector Routing Protocol (AODV) is one among the effective Reactive Routing Protocol in MANET. The main causes for link break are mobility between nodes such as node failure and node power off. Quality of Service (QoS) is one of the main issues for any network and due to bandwidth constraint and dynamic topology of mobile ad hoc networks, supporting Quality of Service (QoS) is extremely a challenging task. The objective of this paper is to enhance the network performance of AODV, when frequent link failure in network due to mobility of the nodes in the network. The performance analysis and simulation are carried out to evaluate network performance using Network Simulator (NS-2), based on the quantitative metrics packet delivery ratio and average end to end delay. The simulated result helps to understand the behavior of the protocol AODV in the distributed network environment under mobility and to show its ability to adapt in real world networks. This paper proposed a new protocol Enhanced AODV (E-AODV) which is a modified version of AODV with enhanced packet delivery ratio and minimized end to end delay.