A Brief Review on Optimal Routing in Vehicular Ad-hoc Network

Vehicular Ad-hoc Networks (VANET) are rapid and reliable networks that transmit safety messages between vehicles to vehicles and vehicles to infrastructure in a multi-hop manner. However, it seems to have some limitations in complex road scenarios, less performance, and issues related to routing strategy and fault tolerance. Thus, many routing protocols are developed to enhance the efficiency of VANETs with highly efficient and reliable routing protocols. This paper gives a brief review of 35 papers on optimal solutions for VANET routing protocol and analyzes various proposed protocols and the performance of these routing protocols. On the other hand, the analysis of link breakage handling for VANET, simulators used for VANET protocols, and the measurements of QoS parameters are evaluated to find the efficiency of each routing protocol. As well as limitations of these routing protocols are also described in this work to pave the way for an efficient and reliable routing protocol for VANET.