ejsr_39_4_14 - European Journal of Scientific Research ISSN...

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European Journal of Scientific Research ISSN 1450-216X Vol.39 No.4 (2010), pp.606-612 © EuroJournals Publishing, Inc. 2010 http://www.eurojournals.com/ejsr.htm MDSR (Modified Dynamic Source Routing) and AODV (Ad hoc On Demand Distance Vector) in MANET P.R.Jasmine Jeni Research Scholar, SRM University, Chennai A.Vimala Juliet Professor, SRM University, Chennai B.Shaji Research Scholar, SRM University,, Chennai Abstract The Ad hoc On Demand Distance Vector (AODV) routing algorithm is a routing protocol designed for ad hoc mobile networks. AODV is capable of both unicast and multicast routing. It is an on-demand algorithm, meaning that it builds routes between nodes only as desired by source nodes. It maintains these routes as long as they are needed by the sources. Additionally, AODV forms trees which connect multicast group members. The trees are composed of the group members and the nodes needed to connect the members. AODV uses sequence numbers to ensure the freshness of routes. AODV decreases maintenance overhead in ad hoc networks, but some path breaks can significantly cause overhead. Dynamic Source Routing (DSR) is a routing protocol for wireless mesh networks. It is associated to AODV in that it forms a route on-demand when a transmitting computer requests one. However, it uses source routing instead of relying on the routing table at each intermediate device. Modified Dynamic Source Routing (MDSR) and AODV (RAODV) routing algorithm is the newly proposed algorithm in this paper to reduce the overhead caused by the AODV. Here, applying the link/route stability in MSRAODV for decrease overhead of discovery and maintenance of routing, based on the performance improvement with respect to the Quality of Service, designed for Mobile Ad hoc Network. This routing protocol route request packet didn't change and it is like as AODV, but rout reply packet must be changed for route stability estimation purpose. 1. Introduction In the next generation of wireless communication systems, there will be a need for the rapid deployment of independent mobile users. A MANET is an autonomous collection of mobile users that communicate over relatively bandwidth constrained wireless links. Since the nodes are mobile, the network topology may change rapidly and unpredictably over time. The network is decentralized, where all network activity including discovering the topology and delivering messages must be executed by the nodes themselves, i.e., routing functionality will be incorporated into mobile nodes. The set of applications for MANETs is diverse, ranging from small, static networks that are constrained by power sources, to large-scale, mobile, highly dynamic networks. The design of network
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MDSR (Modified Dynamic Source Routing) and AODV (Ad hoc On Demand Distance Vector) in MANET 607 protocols for these networks is a complex issue. Regardless of the application, MANETs need efficient distributed algorithms to determine network organization, link scheduling, and routing as shown in
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ejsr_39_4_14 - European Journal of Scientific Research ISSN...

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