Data dissemination protocol for VANET by utilizing distributed roadside traffic information processing node

VANET are now becoming an interesting area of wireless network research. In road network where road information is exchanged among cars, all traffic information must be accurately measured, processed and disseminated to the vehicles in a timely manner. This paper proposes the data dissemination protocol for VANET which is deployed in a roadside unit to help cars exchange their traffic information efficiently. In order to verify the performance of the proposed protocol, this paper uses the network simulator (NS2) software to model and test road network scenarios. Simulation results shows that using the proposed protocol with the roadside unit can decrease traffic load, total dissemination time and can increase the data received ratio and throughput.