ROAD-TO-VEHICLE COMMUNICATION SYSTEM, ROAD-TO-VEHICLE COMMUNICATION METHOD, ROAD-TO-VEHICLE COMMUNICATION PROGRAM AND PROGRAM RECORDING MEDIUM
First Claim
1. ) A road-to-vehicle communication system for performing communication between a road-to-vehicle communication equipment on a vehicle and a roadside communication equipment installed by a road characterized in that:
- 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 the particular communication system of the roadside communication equipment; and
when detected that the vehicle approaches the road-to-vehicle communication possible area by a predetermined distance, the particular communication system of the roadside communication equipment that is installed in the road-to-vehicle communication area is acquired from the roadmap information, thereby switching the road-to-vehicle communication equipment to the communication settings of the particular communication system and setting to the stand-by state for receiving radio wave from the roadside communication equipment.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a road-to-vehicle communication system to provide highly reliable road-to-vehicle communication services by effective use of a car navigation system installed in a vehicle. The roadmap information for the car navigation system 1 contains information to indicate if an area is a road-to-vehicle communication possible area as well as information relating to the communication system of road-to-vehicle communication. When the car navigation system 1 detects that the vehicle approaches the road-to-vehicle communication possible area by a predetermined distance, the vehicle system 3 acquires the communication system of the roadside communication equipment from the roadmap information. And the road-to-vehicle communication equipment 2 is set to the stand-by state of the acquired communication system. When the road-to-vehicle communication equipment 2 receive radio wave from the roadside communication equipment 20, the road-to-vehicle communication equipment 2 is released from the stand-by state and receives from the roadside communication equipment information including warning information to prevent the vehicle from possible traffic accident.
14 Citations
18 Claims
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1. ) A road-to-vehicle communication system for performing communication between a road-to-vehicle communication equipment on a vehicle and a roadside communication equipment installed by a road characterized in that:
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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 the particular communication system of the roadside communication equipment; and when detected that the vehicle approaches the road-to-vehicle communication possible area by a predetermined distance, the particular communication system of the roadside communication equipment that is installed in the road-to-vehicle communication area is acquired from the roadmap information, thereby switching the road-to-vehicle communication equipment to the communication settings of the particular communication system and setting to the stand-by state for receiving radio wave from the roadside communication equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. ) A road-to-vehicle communication method for communicating between a road-to-vehicle communication equipment on a vehicle and a roadside communication equipment installed by a road, comprising the steps of:
including in the roadmap information to be used by the car navigation system on the vehicle at least information to indicate if an area is a road-to-vehicle communication possible area and communication system information indicating the particular communication type of the roadside communication equipment;
detecting by the car navigation system if the vehicle approaches the road-to-vehicle communication possible area by a predetermined distance;
acquiring from the roadmap information the communication system of the roadside communication equipment installed by the road;
setting the road-to-vehicle communication equipment to the acquired communication system; and
causing the road-to-vehicle communication equipment to the stand-by state for receiving radio wave.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
Specification