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 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, whereinwhen 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.
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Accused Products
Abstract
Disclosed is a road-to-vehicle communication system to provide highly reliable road-to-vehicle communication services by use of a vehicle'"'"'s car navigation system. The roadmap information for the car navigation system contains information to indicate if an area is a road-to-vehicle communication possible area, and information relating to the communication system of road-to-vehicle communication. When the car navigation system detects that the vehicle approaches the road-to-vehicle communication possible area by a predetermined distance, a vehicle system acquires the communication system of the roadside communication equipment from the roadmap information. And the road-to-vehicle communication equipment is set to the stand-by state of the acquired communication system. When the road-to-vehicle communication equipment receive radio wave from the roadside communication equipment, the road-to-vehicle communication equipment is released from the stand-by state and receives from the roadside communication equipment warning information to prevent the vehicle from possible traffic accident.
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Citations
18 Claims
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1. A road-to-vehicle communication system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A road-to-vehicle communication method comprising:
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providing a road-to-vehicle communication equipment on a vehicle capable of communicating with roadside communication equipment installed by a road; including in roadmap information to be used by a 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 a 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; setting the road-to-vehicle communication equipment to the acquired communication system; and setting the road-to-vehicle communication equipment to a stand-by state for receiving radio wave. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification