VEHICLE DEVICE CONTROL SYSTEM AND METHOD
First Claim
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1. A vehicle device control system comprising:
- a portable unit carried by a user; and
a vehicle-side unit mounted in a vehicle for performing bilateral communications with the portable unit,in each of the bilateral communications, the vehicle-side unit transmitting a request signal in a predetermined area around the vehicle and the portable unit transmitting a response signal in response to the request signal of the vehicle-side unit,the vehicle-side unit checking up an identification code included in the response signal received from the portable unit with a pre-stored registration code, andthe vehicle-side unit controlling a vehicle device mounted in the vehicle on condition that a checkup result indicates a successful checkup operation,wherein the vehicle-side unit includes;
a vehicle-side transmission section for transmitting the request signal to the portable unit;
a vehicle-side reception section for receiving the response signal from the portable unit; and
a vehicle-side control section for instructing the vehicle-side transmission section to transmit the request signal at a predetermined transmission interval specific to the vehicle side unit, when the response signal is received from the portable unit by the vehicle-side reception section, andwherein the portable unit is operable with power supply from a battery, and includes;
a portable-side reception section for receiving the request signal from the vehicle-side unit;
a portable-side transmission section for transmitting the response signal to the vehicle-side unit;
a portable-side memory section for storing the transmission interval in the vehicle-side unit; and
a portable-side control section for instructing the portable-side transmission section to transmit the response signal when the request signal is received by the portable-side reception section, and for instructing the portable-side reception section to take a reception state at a timing of next transmission of the request signal in correspondence to the transmission interval stored in the portable-side memory section.
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Abstract
A vehicle-side unit transmits a first request signal WAKE periodically toward a portable unit, and transmits a second request signal CHLG at every predetermined transmission interval specific to the vehicle-side unit upon reception of a firs response signal ACK from the portable unit in response to the transmitted WAKE. The portable unit is operable with power supplied from a battery. The portable unit transmits ACK upon reception of WAKE and becomes ready for reception of CHLG at a timing CHLG is transmitted in accordance with the transmission interval specific to the vehicle-side unit.
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Citations
11 Claims
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1. A vehicle device control system comprising:
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a portable unit carried by a user; and a vehicle-side unit mounted in a vehicle for performing bilateral communications with the portable unit, in each of the bilateral communications, the vehicle-side unit transmitting a request signal in a predetermined area around the vehicle and the portable unit transmitting a response signal in response to the request signal of the vehicle-side unit, the vehicle-side unit checking up an identification code included in the response signal received from the portable unit with a pre-stored registration code, and the vehicle-side unit controlling a vehicle device mounted in the vehicle on condition that a checkup result indicates a successful checkup operation, wherein the vehicle-side unit includes; a vehicle-side transmission section for transmitting the request signal to the portable unit; a vehicle-side reception section for receiving the response signal from the portable unit; and a vehicle-side control section for instructing the vehicle-side transmission section to transmit the request signal at a predetermined transmission interval specific to the vehicle side unit, when the response signal is received from the portable unit by the vehicle-side reception section, and wherein the portable unit is operable with power supply from a battery, and includes; a portable-side reception section for receiving the request signal from the vehicle-side unit; a portable-side transmission section for transmitting the response signal to the vehicle-side unit; a portable-side memory section for storing the transmission interval in the vehicle-side unit; and a portable-side control section for instructing the portable-side transmission section to transmit the response signal when the request signal is received by the portable-side reception section, and for instructing the portable-side reception section to take a reception state at a timing of next transmission of the request signal in correspondence to the transmission interval stored in the portable-side memory section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicle device control method, which is performed by bilateral communications between a portable unit carried by a user and a vehicle-side unit mounted in a vehicle, the method comprising:
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detecting a predetermined manipulation of the user in the vehicle; setting a transmission interval in correspondence to a time of detection of the predetermined manipulation of the user, the transmission interval being stored in the vehicle-side unit and transmitted to the portable unit to be stored in the portable unit; transmitting a first request signal from the vehicle-side unit in a predetermined area around the vehicle to wake up the portable unit from a sleep state; transmitting a first response signal from the portable unit upon reception of the first request signal of the vehicle-side unit; setting the portable unit to a reception state for receiving a signal at a time, which is set in correspondence to the transmission interval stored in the portable unit so that the portable unit is ready for receiving signals at the set time; transmitting a second request signal from the vehicle-side unit after the transmission interval from transmission of the first request signal to request an identification code of the portable unit; transmitting a second response signal from the portable unit upon receipt of the second request signal at the set time, the second response signal including an identification code of the portable unit; checking up, by the vehicle-side unit, the identification code included in the second response signal with a registration code pre-stored in the vehicle-side unit; and driving a predetermined vehicle device mounted in the vehicle when a result of checkup by the vehicle-side unit indicates agreement of the identification code and the registration code, thereby starting the predetermined vehicle device to operate before the user actually operates.
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Specification