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VANETs (Vehicular Ad hoc Networks) are highly mobile wireless ad hoc networksand will play an important role in public safety communications and commercialapplications. Routing of data in VANETs is a challenging task due to rapidlychanging topology and high speed mobility of vehicles. Position based routingprotocols are becoming popular due to advancement and availability of GPSdevices. One of the critical issues of VANETs are frequent path disruptionscaused by high speed mobility of vehicle that leads to broken links whichresults in low throughput and high overhead . This paper argues the use ofinformation on vehicles' movement information (e.g., position, direction, speedof vehicles) to predict a possible link-breakage event prior to its occurrence.So in this paper we propose a Reliable Directional Greedy routing (RDGR), areliable position based routing approach which obtains position, speed anddirection of its neighboring nodes from GPS. This approach incorporatespotential score based strategy, which calculates link stability betweenneighbor nodes in distributed fashion for reliable forwarding of data packet.

Improved Packet Forwarding Approach in Vehicular Ad Hoc Networks Using RDGR Algorithm