Optimization for Wireless Vehicular Network System in Urban Area

This paper aims to optimize the usefulness of the next generation vehicular network system so call WAVE (Wireless Access in Vehicle Environment) especially in urban areas that have heavy traffic density and high potential traffic accidents. The wireless vehicular technology is mainly based on DSRC (Dedicated Short Range Communication) technology defined by IEEE (Institute of Electrical and Electronics Engineers Inc.) and ETSI (European Telecommunication Standard Institute). The WAVE system is going to be used for safety and comport of vehicle mobility, for example, to avoid collision of car to car, car to other mobility and car to pedestrian and to reduce traffic congestion. In order to achieve those purposes, WAVE system is installed in vehicles as OBU (On Board Unit) and set at road side as RSU (Road Side Unit). Therefore, it is important how to set RSUs appropriate position. Authors analyze traffic condition and traffic accident condition of typical urban metropolitan area such as Tokyo and provide RSU setting guide from urban development point of view.