STUDY AND PERFORMANCE ESTIMATION OF ROUTING PROTOCOLS MANET

A mobile ad hoc network consists of wireless hosts that may move often. Movement of hosts results in a change in routes, requiring some mechanism for determining new routes. Several routing protocols have already been proposed for ad hoc networks. In mobile communications, effective internetworking is mandatory in order to support user roaming among various types of wireless networks while maintaining connectivity. In this paper we have study and performance estimation of routing protocols AODV and DSR . Both share similar On-Demand behaviour, but the protocol‟s internal mechanism leads to significant performance difference. We have analysed the performance of protocols by varying network load, mobility and type of traffic (CBR and TCP). A detailed simulation has been carried out in NS2. The metrics used for performance analysis are Packet Delivery Fraction, Average end-to-end Delay, Routing Overhead and Normalized Routing Load. It has been observed that AODV gives better performance in CBR traffic and real time delivery of packet. Whereas DSR gives better results in TCP traffic and under restricted bandwidth condition.

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