Comparison of Ad-hoc reactive routing protocols using OPNET modeler

Ad hoc networks are infrastructure less self organizing networks. These networks are referred to as infrastructure less because there is no physical connection between the entities of ad-hoc networks. All the entities in ad-hoc networks communicate with other entities which lie in its radio frequency range. All the mobile nodes in the network dynamically set up paths among themselves to transmit packets temporarily. A Mobile Ad hoc Networking (MANET) is an autonomous system of mobile nodes. Nodes act as a router, client and server as well and its topology is dynamic as nodes join the network whenever there is need to transmit data and leave the network when transmission gets over. These networks do not have a Central Authority(CA) for the management of the network. In recent past, several routing protocols for MANET are being proposed. Some of the prominent and promising among them are Ad hoc On-demand Distance Vector (AODV), Dynamic Source Routing (DSR), Temporally-Ordered Routing Algorithm (TORA) and Destination-Sequenced Distance Vector (DSDV).In this study, various reactive routing protocols such as Ad hoc On-demand Distance Vector (AODV), Dynamic Source Routing (DSR) and Temporally Ordered Routing Algorithm (TORA), are compared on the basis of their throughput by increasing number of nodes in the network.