Performance of QoS Parameter in Wireless Ad hoc Network (IEEE 802.11b)

A wireless Ad-hoc network consists of wireless nodes communicating without the need for a centralized administration, in which all nodes potentially contribute to the routing process. A user can move anytime in an ad hoc scenario and, as a result, such a network needs to have routing protocols which can adopt dynamically changing topology. To accomplish this, a number of ad hoc routing protocols have been proposed and implemented, which include Dynamic Source Routing (DSR), Destination Sequenced Distance Vector (DSDV) and ad hoc on-demand distance vector (AODV) routing. In this paper, we analyze the performance differentials to compare the above-mentioned commonly used ad hoc network routing protocols. We report the simulation results of three different protocols for wireless ad hoc networks having thirty nodes. The performances of proposed networks are evaluated in terms of number of retransmission attempts, Control traffic sent, Control traffic received, Data Traffic sent, Data Traffic received and throughput with the help of OPNET simulator. Data rate 2Mbps and simulation time 20 minutes were taken. For this above simulation environment, AODV shows better performance over the other two on-demand protocols, that is, DSR and DSDV.