QOS PARAMETER ANALYSIS ON AODV AND DSDV PROTOCOLS IN A WIRELESS NETWORK

Wireless networks are characterized by a lack of infrastructure, and by a random and quickly changing network topology; thus theneed for a robust dynamic routing protocol that can accommodate such an environment. To improve the packet delivery ratio ofDestination-Sequenced Distance Vector (DSDV) routing protocol in mobile ad hoc networks with high mobility, a message exchangescheme for its invalid route reconstruction is being used. Two protocols AODV and DSDV simulated using NS-2 package and werecompared in terms throughput, end to end delay and packet faction delivery varying number of nodes, speed and time. Simulationresults show that DSDV compared with AODV, DSDV routing protocol consumes more bandwidth, because of the frequentbroadcasting of routing updates. While the AODV is better than DSDV as it doesn’t maintain any routing tables at nodes whichresults in less overhead and more bandwidth. AODV perform better under high mobility simulations than DSDV. High mobilityresults in frequent link failures and the overhead involved in updating all the nodes with the new routing information as in DSDV ismuch more than that involved AODV, where the routes are created as and when required. AODV use on -demand route discovery, but with different routing mechanisms. AODV uses routing tables, one route per destination, and destination sequence numbers, amechanism to prevent loops and to determine freshness of routes