Internetworking over vehicular ad-hoc networks (VANETs) is getting increasing attention from all major car manufacturers. Highways provide an important test case for enhanced Collision Warning System (CWS) based on vehicle to vehicle (v2v) communications. Owing to the limited number of test beds and their high cost, we focus on the evaluation studies being performed via simulation. As the mobility of vehicles and driver behavior can be affected by network messages, these tools must include a vehicle mobility model integrated with a quality network simulator. DSRC-based wireless communication protocols can be leveraged for the development of a collision warning system application for enhancing highway traffic safety. The key parameter that needs to be fed into these protocols is a realistic mobility model which contains criterion linked to speed, road intersections, traffic light effect etc. Several mobility models are developed in this regard. Various simulations with different parameters and network model are therefore the first step to study the performance of communication network in VANET so as to develop an effective VANET system over a region or area. This article presents a review of the Collision Warning System using the traffic simulator VanetMobisim and the popular networking simulator NS-2.
Loading....