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Adaptive AODV Routing Protocol for Mobile ADHOC Networks

Author(s): Shobha.K.R | K.Rajanikanth

Journal: International Journal of Ad Hoc, Sensor & Ubiquitous Computing
ISSN 0976-2205

Volume: 2;
Issue: 1;
Start page: 125;
Date: 2011;
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Keywords: Network Protocols | MANET | reactive routing | AODV | flooding | mobility.

Enhancing route request broadcasting efficiency in protocols constitutes a substantial part of research inMobile Adhoc NETwork (MANET) routing. We suggest a novel approach to constrain route requestbroadcast based on mobility of nodes. This technique is best suited for networks where the movement ofthe nodes is with different random velocities in different random directions. This protocol adapts itselfautomatically to two mobility conditions i.e. moderate and high speed. Intuition behind this technique isthat the nodes moving with higher mobility rates will have better recent routes compared to slow movingnodes which may not be aware of the drastic changes happening in the network .In this approach weselect the neighbourhood nodes for broadcasting route requests based on their mobility rate and recentinvolvement in routing so that blind flooding of the route request in the network can be avoided.Our contributions include: (i) Two new enhancement technique to reduce route request broadcast forreactive ad hoc routing protocols; (ii) Implementation of Enhanced Ad-hoc On-demand Distance Vectorrouting 1 (EAODV1) for moderate speed of node movement;(iii) Implementation of Enhanced Ad-hoc OndemandDistance Vector routing 2 (EAODV2) for high speed of node movement; (iv) Implementation ofAdaptive AODV (AAODV) which automatically switches over between EAODV1 and EAODV2 based onthe mobility of the nodes. (v) An extensive simulation study of EAODV1, EAODV2 and AAODV usingGlomosim showing significant improvement in overhead, packet delivery ratio and the end-to-end delay
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