RFID Assisted Vehicle Positioning in VANETs

With technological advancement, recent VANET applications such as safe driving and emergency rescue often demand high position accuracy. Unfortunately, however, conventional localization systems, e.g., GPS, hardly meet new accuracy requirements. To overcome this limitation, this paper proposes an RFID-assisted localization system. The proposed system employs the DGPS concept to improve GPS accuracy. A vehicle obtains two different position data: GPS coordinate from own GPS receiver and accurate physical position via RFID communication. Then, it computes GPS error and shares it with neighbors to help those correct inaccurate GPS coordinates.