Patent ID: 8219132
Filing Date: 2012-07-10
Classification: G08G,H04W

Abstract:
1. A communication system that performs radio communication between a plurality of vehicle-mounted terminal devices and a base station device, wherein the base station device includes: a transmitting unit that transmits identification information of the base station device; a storage unit that stores partial vehicle-mounted device information of the vehicle-mounted terminal devices; a receiving unit that receives, from a vehicle-mounted terminal device, vehicle-mounted device information of the vehicle-mounted terminal device, and lastly-accessed identification information indicating a base station device that was in radio communication with the vehicle-mounted terminal device just before when radio communication therewith is cut off; and a processing unit that performs, when there is a match between the lastly-accessed identification information and identification information in the storage unit, an authentication based on the received vehicle-mounted device information and the partial vehicle-mounted device information stored in the storage unit, and each of the plurality of vehicle-mounted terminal devices includes: a receiving unit that receives the identification information of the base station device; and a transmitting unit that transmits the vehicle-mounted device information and the lastly-accessed identification information to the base station device.