Patent ID: 7965198
Filing Date: 2011-06-21
Classification: G08G

Abstract:
1. A road-to-vehicle communication system comprising: a road-to-vehicle communication equipment on a vehicle capable of communicating with a roadside communication equipment installed by a road; roadmap information to be used by a car navigation system on the vehicle includes at least information to indicate whether the road is in an area where the roadside communication equipment is installed for enabling road-to-vehicle communication and communication system information to specify a particular communication system of the roadside communication equipment, wherein when the car navigation system detects the vehicle approaching the road-to-vehicle communication possible area by a predetermined distance, the road-to-vehicle communication system acquires the particular communication system of the roadside communication equipment from the roadmap information, switches the road-to-vehicle communication equipment to the communication settings of the particular communication system and sets to a stand-by state for receiving radio wave from the roadside communication equipment.