Gateway Node-Based Greedy Routing Algorithm for Efficient Packet Forwarding in Vehicular Ad Hoc Networks

In recent years, vehicular communications are one of the hottest research topics. It has also gained much attention in industry as well as academia. Vehicular Ad Hoc Networks (VANETs) are advances of the wireless communication technologies. Routing is one of the key research issues in VANETs as long as it plays an important role in public safety and commercial applications. In VANET, routing of data is a challenging task due to high speed of nodes (i.e., vehicles) movement and rapidly changing topology. Recent research showedthat existing routing algorithm solutions for Mobile Ad Hoc Networks (MANETs) are not able to meet the unique requirements of vehicular networks. In this paper, we propose Gateway Node-Based Greedy Routing(GNGR), a reliable greedy position-based routing approach algorithm. In GNGR, we forward the packets to any of the nodes in the corner of the transmission range of source/forwarding node as most suitable next hop. With this consideration, the nodes move towards the direction of the destination. We propose Dynamic TransitionMobility Model (DTMM) to evaluate our routing technique. This paper gives a complete description of our packet forwarding approach and simulation results. The simulation results are carried out based on Packet Delivery Ratio (PDR). Our routing technique is compared with other routing techniques; the PDR is improved significantly compared with other routing techniques of VANET.