Literature Review of QoS and Related Issues of Vehicular Adhoc Network

Vehicular communication system delivers two main types of communications that is vehicle to vehicle and vehicle to infrastructure. It offers information sharing, cooperative driving, and value added services like navigation, internet access, etc. Communication between vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) are ad hoc in nature that is why it's called as a vehicular ad hoc network. There is an opportunity for that it will become a world largest ad hoc network. Even though there are so many advantages in VANET, some consequences are there to defeat. In this paper, we have concentrated on a survey of VANET issues and solved by various authors. Our study demonstrates the overall works and results concerning different routing algorithms and its performance, collision issues, broadcast mechanism, message alerts creation for vehicles, cluster formation for communication, real-time emergency healthcare at vehicles and so on.