A Survey Paper on Routing Protocol of Vehicular Ad-Hoc Network

Vehicular ad hoc networks (VANETs) are networks that do not have a specific structure, in which network-forming nodes are moving vehicles. Therefore, routing is essential for data dissemination in these networks. The problem of the link failure between vehicles is one of the principal challenges in these networks. VANET provide vehicle to vehicle communication (V2V) and vehicle to infrastructure or roadside communication (V2I) .V2I can provide real-time information on road traffic conditions, weather, and basic internet services. V2V can be used to provide information about traffic conditions and vehicle accidents. Vehicles are wirelessly connected in the vehicle to vehicle communication environment using multi-hop communication without access to any fixed infrastructure. In V2V communication vehicles communicate with each other through their OBUs. Routing is a very important issue in VANET and designing an efficient routing protocol is very difficult for all VANET application. In order to do reliable routing, VANET-Cloud infrastructure will be used to achieve the same. RSU will act as a gateway between vehicles and cloud. Due to the knowledge of topology, the cloud will assist reliable routing.