Romisha Arora, Noor Fatima Rizvi
The field of Mobile Ad-hoc NETworks (MANETs) has gained very important part of the interest of researchers and become very popular in the last few years. MANETs can operate without fixed infrastructure and can survive rapid changes in the network topology. In this each node operates not only as an end system, but also as a router to forward packets.. A Reactive (on-demand) routing strategy is a popular routing category for wireless ad-hoc routing. It is relatively new routing philosophy that provides a scalable solution to relatively large network topologies. Here we have compared the performance of three prominent on-demand protocols for MANETs: Ad hoc On Demand Distance Vector (AODV), Dynamic Source Routing (DSR), Location Aided Routing (LAR1) protocols. All three are reactive gateway discovery protocols where mobile device of MANET connects by gateway only when it is needed i.e. On-demand. The performance differentials are analyzed using varying no. of nodes and simulation time by using GlomoSim simulator.