Mitsubishi Heavy Industries Mechatronics Systems, Ltd.

Mitsubishi Heavy Industries Machinery Systems, Ltd.

Yoshifumi Hayakawa

Takeshi Nagata

Hideaki Murata

Jun Yasui

Hisaji Takeuchi

Naoshi Noguchi

A travel distance calculation device includes: a first travel distance calculation unit configured to calculate a travel distance of a vehicle on the basis of position information on the vehicle obtained through position determination using a GNSS satellite; a second travel distance calculation unit configured to calculate a travel distance of the vehicle on the basis of the number of rotations of a tire that the vehicle includes; and a calculation-means selecting unit configured to select calculation means configured to calculate the travel distance of the vehicle from among the first travel distance calculation unit and the second travel distance calculation unit on the basis of at least one of the position information on the vehicle obtained through position determination using the GNSS satellite and information indicating a state of communication with the GNSS satellite.

Travel distance calculation device, charging system, travel distance calculation method, program, and storage medium

An on-board unit includes a first antenna and a second antenna, a traffic data service communicating section corresponding to a traffic data service; a billing service communicating section corresponding to a billing service, a switch which switches a connection relation between each of the first antenna and the second antenna and the traffic data service communicating section and the billing service communicating section, a control section which controls the switch. When the operation mode is switched from the traffic data service mode to the billing service mode, the on-board unit is set to a switching communication mode in which one of the first antenna and the second antenna is connected with the traffic data service communicating section and the other is connected with the billing service communicating section.

On-board unit, communication method, and recording medium

A communication system includes an on-board unit adapted to a vehicle-vehicle communication and roadside equipmentperforming a roadside-vehicle communication. In communications in service channels of the vehicle-vehicle communication, one reception-only service channel in which the on-board unit only performs a reception operation is provided for a plurality of the service channels and communications in the reception-only service channel is performed at the same frequency as that of the control channels of the roadside-vehicle communication. When the vehicle-vehicle communication is performed, the on-board unit performs switching to the roadside-vehicle communication in response to detection of reception in the reception-only service channel of a radio signal transmitted from the roadside equipmentin a control channel of the roadside-vehicle communication.

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Tokyo, Japan

Yoshifumi Hayakawa