A closer look through routing protocols in vehicular ad hoc networks (VANETs)

During last few decades, due to new achievements in network technologies and advancements of wireless technologies researchers attracted towards new network called vehicular ad hoc networks (VANETS). Vehicular ad hoc networks (VANETs) are modern type of mobile ad hoc networks (MANETs), in which on road vehicles communicate with each other or communicate to road side unit for safety and comfort. Most recent research works focus on various areas of VANETs like security, routing and quality of service but no optimal routing algorithm for all VANET application is designed due to dynamic nature of this network. Still there is lots of research to be done for routing algorithms, services and most suitable architecture for these new mobile networks. Proposing a new routing algorithm or changing the existing routing algorithm requires an intense knowledge of pre proposed routing protocols. In this paper we have presented a survey of proposed algorithms of routing in VANETs and their advantages and disadvantages which will be quite beneficial for researchers to understand the routing in VANETs and for proposing a new approach or changing an existing one. In last section of this paper comparison of various routing protocols according to different parameters also presented to understand scope of them according to various applications.