Abstract-Vehicular ad-hoc network contains of very intelligent vehicles on the pathways and give communication service to the dives in the network or can connect with the roadside devices. In the near future it will provide many service and fast delivery of information with minimal delay. It is the modern technology which is mixing the wireless networking to vehicles. The main goal of the VANET system is to provide uninterrupted connectivity to the vehicular users on road, smart vehicle to vehicle interaction without any interruptions is known as intelligent transportation system (ITS). In this paper, we present a review on the VANET, its trust issues, how routing is done in VANET. Different routing and the type of trust models with which routing takes place are discussed. Comparison of parameter such as throughput, bit-error rate and delay are done on the basis of, with optimization and without optimization according to number of rounds.
Keywords-Vehicular ad-hoc network (VANET), on-board unit (OBU), application unit (AU), artificial bee colony (ABC)I. INTRODUCTION Vehicular ad-hoc network is an emerging technology from the last few years. It is kind of network which is created by establishing a network of cars or any moving device for a specific situation. It is a reliable network that is used by vehicle to communicate remotely. The main aim of the vehicular ad-hoc network to set up communication channel or network among the vehicles without using the base controller. The major applications of the vehicular ad-hoc network is its use in medical emergency when need of service to human or any individual is required, the communication channel helps in sending the information to right place on right time. With VANET benefits, challenges also emerge such as lack of infrastructure. Every vehicle manages and control the communication of its own and on the network In vehicular network moving vehicles can communicates to each other directly which is known as vehicle to vehicle communication [1].It converts every participating car in the network into vehicular router, allowing the range of connection from 1 km to 3 km. If some vehicle losses its connection it can re-join to another near network and the old place can be filled up by any other approaching vehicle near the network. It is assumed that firstly this type of system was used by police and fire vehicles for communication. Vehicular ad-hoc network may implement different technologies for its working such as dedicated short range communication, cellular, satellite and Wi-Max networks. VANET is considered as the factor of intelligent transportation system [2].In today technology, VANET has done a lot of advancement in the vehicle performance by consuming less battery and jitter. It is basically a fusion network which provides the connectivity to all the vehicles in the network [3]. It is the type of MANET network which also use moving cars to make a network. The whole communication is in particular range. The vehicles try to exchange data and other signals even if t...