range Wireless Communication System for V 2 I

Vehicle to Infrastructure (V2I) and Vehicle to Vehicle (V2V) communications realize the wireless exchange of critical safety information between vehicles and infrastructures so as to avoid or at least mitigate the vehicle to vehicle, and/or vehicle to person collisions, which has brought in outstanding attentions from public and private sectors. For example, the United States Department of Transportation (USDOT) has launched a national program to enhance vehicle transportation through the applications of communication technologies known as IntelliDriveSM (succeeding the USDOT's VII, for Vehicle-Infrastructure Integration, program). This system considers safety, mobility, and environmental improvements through a combination of vehicle to vehicle and vehicle to infrastructure communications. On the other hand, the fast developing wireless communication technologies provide cutting edge innovative technologies that have the potential to improve the communications among vehicles, infrastructures, and human beings. This paper intends to review the available devices/techniques that can be used for such applications. Possible candidates for dedicated short range communication (DSRC) include Bluetooth, Wi-Fi, Radio Frequency Identification (RFID), and ZigBee. Typical techniques are those that are related to object positioning. One conceptual application in work zone is introduced and it is recommended testing the applications of these devices and techniques in both simulation and on-site environments. TYPICAL WIRELESS COMMUNICATION DEVICESS AND TECHNIQUES Typical wireless communication systems or devices include Bluetooth, RFID, and ZigBee. Wi-Fi is not a wireless communication, but it can be of great assistance to the transmission of wireless information through combined usages. In V2I, V2V, and even V2P communication systems, it is always a need to identify the position of a vehicle, a roadway infrastructure, or a person (a worker, or a pedestrian). Therefore, it is important to know the various position techniques, including the wireless position techniques and GPS based positioning techniques. All these will be reviewed in the following sections.