ABSTRACT
Vehicular Ad Hoc Network (VANET) is a sub class of mobile ad hoc networks. VANET provides wireless communication among vehicles and vehicle to road side equipments. The communication between vehicles is used for safety, comfort and for entertainment as well. The performance of communication depends on how better the routing takes place in the network. Routing of data depends on the routing protocols being used in network. In this study different ad hoc routing protocols for VANET are studied. The main aim of this study is to identify which ad hoc routing method has better performance in highly mobile environment of VANET. To measure the performance of routing protocols in VANET, two different scenarios i.e. city and highway are considered. Routing protocols were selected carefully after carrying out literature review. The selected protocols were then evaluated through simulation in terms of performance metrics i.e. throughput and packet drop. After simulation results, MATLAB can be used to plot the graph to compare the results of selected routing protocols with each other.
From the results, it is observed that A-STAR shows better performance in terms of high throughput and low packet drop as compared to AODV and GPSR in city environment, while GPSR shows better performance as compared to AODV in both highway and city environment of VANET. Based on the results of performance metrics in different environments of VANET, it is realized that position based routing method of VANET outperformed the traditional ad hoc topology based routing. In VANET the protocol performance depends on vehicle speed, driving environment etc. that may vary from one environment of network to another.

Issues of Routing IN VANET
ABSTRACT
Vehicular Ad Hoc Network (VANET) is a sub class of mobile ad hoc networks. VANET provides wireless communication among vehicles and vehicle to road side equipments. The communication between vehicles is used for safety, comfort and for entertainment as well. The performance of communication depends on how better the routing takes place in the network. Routing of data depends on the routing protocols being used in network. In this study different ad hoc routing protocols for VANET are studied. The main aim of this study is to identify which ad hoc routing method has better performance in highly mobile environment of VANET. To measure the performance of routing protocols in VANET, two different scenarios i.e. city and highway are considered. Routing protocols were selected carefully after carrying out literature review. The selected protocols were then evaluated through simulation in terms of performance metrics i.e. throughput and packet drop. After simulation results, MATLAB can be used to plot the graph to compare the results of selected routing protocols with each other.
From the results, it is observed that A-STAR shows better performance in terms of high throughput and low packet drop as compared to AODV and GPSR in city environment, while GPSR shows better performance as compared to AODV in both highway and city environment of VANET. Based on the results of performance metrics in different environments of VANET, it is realized that position based routing method of VANET outperformed the traditional ad hoc topology based routing. In VANET the protocol performance depends on vehicle speed, driving environment etc. that may vary from one environment of network to another.

.plase forward me the full report on VANET