ABSTAR: Improves Qos for City Environment in VANET

Vehicular Ad-Hoc Network (VANETs) is a sub class of mobile ad-hoc network (MANETs). The design for efficient routing protocols for VANETs (city environment) is important and necessary issue for support the smart intelligent transportation system (ITS). The main difference between VANET and MANET is the special mobility pattern and rapidly changeable topology. Providing greater efficiency in city environment has a great role in Intelligent Transportation System (ITS). Due to more obstacles in city environment, most of the existing protocol fails to provide greater efficiency. This paper proposes a new ad hoc routing scheme called Anchor bus based street and traffic aware routing (ABSTAR), designed specifically for performance improvement in highly mobile environment of VANETs (city environment). This ABSTAR inherits the characters of geographic routing and also contains additional features such as choose a route with the smallest number of buses as possible between various source and destination.