Mobility and Scalability based Performance Analysis of DSDV, AODV and DSR Routing Protocols in MANETs - A Technical Perspective

Mobile ad hoc network is a self-directed structure of mobile nodes connected by wireless links. All nodes operate not only as an end system, but also as work as a router to forward the packets. Ad hoc wireless networks are characterized by multi-hop wireless connectivity, infrastructure less and habitually changing topology. It may be necessary for one mobile node to schedule other hosts for forwarding a packet from source to destination node due to the constrained transmission range of wireless network interfaces. Therefore a self-motivated routing protocol is required for these networks to work properly. A number of Routing protocols have been created to achieve this task. In this paper, the performance of Mobile Ad-Hoc network routing protocols DSDV, AODV and DSR are evaluated using network simulator NS2. The performance metrics includes PDF (Packet Delivery Fraction), Throughput, End to End Delay, NRL (Normalized Routing Load), routing overhead and Packet Lost. The performances of routing protocols are evaluated by varying mobility and scalability By the simulation it is observed that the performance of reactive routing protocols DSR and AODV performed significantly better than proactive routing protocol DSDV for the CBR based traffic in terms of packet delivery fraction, throughput, packet lost and NRL.