Transmission control device, vehicle system, transmission control method, and control program product
AssigneeDenso Corporation
InventorKenji KATO
Life of this patent
Estimating the term…
Abstract
A transmission control device, which drives multiple antennas having different transmission ranges, includes: a genuine transmission control unit that transmits, from a genuine transmission antenna with use of a carrier wave, a genuine code for activating a portable device; and an inversion transmission control unit that transmits, from an inversion transmission antenna with use of a carrier wave, an inversion code including at least partial inverted genuine code concurrently with a transmission of the genuine code from the genuine transmission antenna. The inversion transmission antenna has a transmission range which does not overlap with a transmission range of the genuine transmission antenna.
Claims15
A transmission control device mounted on a vehicle and driving a plurality of antennas to detect a position of a portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas, the plurality of antennas being arranged at respective positions of the vehicle and having different transmission ranges from one another, and the portable device being carried by a user, the transmission control device comprising:
- a genuine transmission control unit configured to control a genuine transmission antenna to transmit, with use of a carrier wave, a genuine code that activates the portable device, and the genuine transmission antenna being one of the plurality of antennas;
- and
- an inversion transmission control unit configured to control an inversion transmission antenna to transmit, with use of a carrier wave, an inversion code including at least partial inverted genuine code concurrently with a transmission of the genuine code from the genuine transmission antenna, and the inversion transmission antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the genuine transmission antenna.
A transmission control device mounted on a vehicle and driving a plurality of antennas to detect a position of a portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas, the plurality of antennas being arranged at respective positions of the vehicle and having different transmission ranges from one another, and the portable device being carried by a user, the transmission control device comprising:
- a first transmission control unit configured to control a first transmission antenna to transmit, with use of a carrier wave, a genuine code that activates the portable device and a first burst signal following the genuine code, and the genuine transmission antenna being one of the plurality of antennas;
- and
- a second transmission control unit configured to control a second transmission antenna to transmit, with use of a carrier wave, a second burst signal having a 180 degrees shifted phase from the first burst signal concurrently with a transmission of the first burst signal from the first antenna, and the second antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the first antenna.
A vehicle system comprising:
- a portable device carried by a user;
- and
- a transmission control device mounted on a vehicle and driving a plurality of antennas to detect a position of the portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas, the plurality of antennas being arranged at respective positions of the vehicle and having different transmission ranges from one another,
- wherein
- the transmission control device includes:
- a first transmission control unit configured to control a first transmission antenna to transmit, with use of a carrier wave, a genuine code that activates the portable device and a first burst signal following the genuine code, the genuine transmission antenna being one of the plurality of antennas;
- and
- a second transmission control unit configured to control a second transmission antenna to transmit, with use of a carrier wave, a second burst signal having a 180 degrees shifted phase from the first burst signal concurrently with a transmission of the first burst signal from the first antenna, and the second antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the first antenna,
- the portable device includes a transmission unit,
- the transmission unit is configured to transmit information which enables a detection of the position of the portable device relative to the vehicle in response to a reception of the first burst signal followed by the genuine code, and
- the transmission unit is configured to not transmit the information which enables the detection of the position of the portable device relative to the vehicle when the first burst signal is not received after a reception of the genuine code.
A transmission control method executed by a transmission control device, which is mounted on a vehicle and drives a plurality of antennas to detect a position of a portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas, the plurality of antennas being arranged at respective positions of the vehicle and having different transmission ranges from one another, and the portable device being carried by a user, the transmission control method comprising:
- transmitting, with use of a carrier wave from a genuine transmission antenna, a genuine code that activates the portable device, and the genuine transmission antenna being one of the plurality of antennas;
- and
- transmitting, with use of a carrier wave from an inversion transmission antenna, an inversion code including at least partial inverted genuine code concurrently with a transmission of the genuine code from the genuine transmission antenna, and the inversion transmission antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the genuine transmission antenna.
A transmission control method executed by a transmission control device, which is mounted on a vehicle and drives a plurality of antennas to detect a position of a portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas, the plurality of antennas being arranged at respective positions of the vehicle and having different transmission ranges from one another, and the portable device being carried by a user, the transmission control method comprising:
- transmitting, with use of a carrier wave from a first transmission antenna, a genuine code that activates the portable device and a first burst signal following the genuine code, and the genuine transmission antenna being one of the plurality of antennas;
- and
- transmitting, with use of a carrier wave from a second transmission antenna, a second burst signal having a 180 degrees shifted phase from the first burst signal concurrently with a transmission of the first burst signal from the first antenna, and the second antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the first antenna.
A control program product comprising instructions for controlling a computer to be implemented as a transmission control device,
- wherein
- the transmission control device is mounted on a vehicle and drives a plurality of antennas to detect a position of the portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas,
- the plurality of antennas are arranged at respective positions of the vehicle and have different transmission ranges from one another, and the portable device is carried by a user, and
- the control program product further comprises instructions that control the transmission control device to function as:
- a genuine transmission control unit configured to control a genuine transmission antenna to transmit, with use of a carrier wave, a genuine code that activates the portable device, and the genuine transmission antenna being one of the plurality of antennas;
- and
- an inversion transmission control unit configured to control an inversion transmission antenna to transmit, with use of a carrier wave, an inversion code including at least partial inverted genuine code concurrently with a transmission of the genuine code from the genuine transmission antenna, and the inversion transmission antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the genuine transmission antenna.
A control program product comprising instructions for controlling a computer to be implemented as a transmission control device,
- wherein
- the transmission control device is mounted on a vehicle and drives a plurality of antennas to detect a position of the portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas,
- the plurality of antennas are arranged at respective positions of the vehicle and have different transmission ranges from one another, and the portable device is carried by a user, and
- the control program further comprises instructions that control the transmission control device to function as:
- a first transmission control unit configured to control a first transmission antenna to transmit, with use of a carrier wave, a genuine code that activates the portable device and a first burst signal following the genuine code, and the genuine transmission antenna being one of the plurality of antennas;
- and
- a second transmission control unit configured to control a second transmission antenna to transmit, with use of a carrier wave, a second burst signal having a 180 degrees shifted phase from the first burst signal concurrently with a transmission of the first burst signal from the first antenna, and the second antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the first antenna.
Dependencies are inferred from the claim text.