Simulation and Comparison of AODV, DSR and AOMDV Routing Protocols in MANETs
Manveen Singh Chadha1, Rambir Joon2, Sandeep3

1Manveen Singh Chadha, M.Tech, Department of ECE, Jagannath University, Jaipur (Rajasthan), India.
2Rambir Joon, M.Tech, Department of ECE, Jagannath University, Jaipur (Rajasthan), India
3Sandeep, M.Tech, Department of ECE, Jagannath University, Jaipur (Rajasthan), India

Manuscript received on July 01, 2012. | Revised Manuscript received on July 04, 2012. | Manuscript published on July 05, 2012. | PP: 375-381 | Volume-2, Issue-3, July 2012. | Retrieval Number: C0801062312 /2012©BEIESP
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Abstract: A Mobile Ad-hoc Network (MANET) is a dynamic wireless network that can be formed without the need for any pre-existing infrastructure in which each node can act as a router. Mobile ad hoc network (MANET) is an autonomous system of mobile nodes connected by wireless links. Each node operates not only as an end system, but also as a router to forward packets. The nodes are free to move about and organize themselves into a network. These nodes change position frequently. The main classes of routing protocols are Proactive, Reactive and Hybrid.A Reactive (on-demand) routing strategy is a popular routing category for wireless ad hoc routing The design follows the idea that each node tries to reduce routing overhead by sending routing packets whenever a communication is requested.In this work an attempt has been made to compare the performance of three prominent on demand reactive routing protocols for MANETs:- Ad hoc On Demand Distance Vector (AODV), Dynamic Source Routing (DSR) protocols and Ad-hoc On-demand Multipath Distance Vector Routing (AOMDV) . DSR and AODV are reactive gateway discovery algorithms where a mobile device of MANET connects by gateway only when it is needed. AOMDV was designed primarily for highly dynamic ad hoc networks where link failures and route breaks occur frequently. It maintains routes for destinations in active communication and uses sequence numbers to determine the freshness of routing information to prevent routing loops. It is a timer-based protocol and provides a way for mobile nodes to respond to link breaks and topology changes.The performance differentials are analyzed using varying simulation time. These simulations are carried out using the ns-2 network simulator. The results presented in this work illustrate the importance in carefully evaluating and implementing routing protocols in an ad hoc environment.