Theoretical analysis and improvement of performance in multi-class zone ITS communication scheme

This paper describes performance analysis and improvement of the road-vehicle communication(RVC) in the multi-class zone ITS communication scheme by theory and simulation. This scheme is an integrated communication scheme of IVC(inter-vehicle communication) and RVC with basestations at intersections. In conventional research, the performance analysis of this scheme is carried out by traffic and communication simulation, but the computational complexity of communication simulations is much larger than that of traffic simulations. For the reduction of the complexity, we derive the transmission success ratio and the required bandwidth theoretically and evaluate the performance using a traffic simulation and the derived theory. The performance comparison between this evaluation without communication simulations and the evaluation using both traffic and communication simulations shows that the performance evaluation of this scheme´s RVC can be carried out without communication simulations. Moreover, we derive the optimum transmission frequency that minimizes the required bandwidth. As a result, the required bandwidth can be reduced by half under the same traffic situation.