Critical Review of Topology based Routing Protocols in VANETs

Because of daily life natural or unnatural accidents, the Vehicular Ad-Hoc Network (VANET) is one of the affecting areas for the enhancement of Intelligent Transportation System (ITS) for facilitating road safety, traffic management and entertainment services for drivers and passengers. Vehicular networks can help avoid accidents by warning drivers of forthcoming risks or prompting embedded systems to respond autonomously. Multi-hop wireless connectivity and frequently changing network topology in VANET are the factors to plan effective and efficient dynamic routing protocols. While these studies are anticipating, designing protocols for vehicular networks has many challenges. The current routing protocols for VANET are not sufficiently effective to meet all traffic situations. Therefore Creditable routing protocols are required to start correspondence between vehicles in future for passengers and road security and safety. This paper demonstrates literature study related to some of the Topology-based investigated VANETs routing protocols in the light of premise of their characteristics and operations and additionally their qualities and shortcomings. Furthermore a few proposals are made to accomplish change in execution of these protocols.