WIRELESS COMMUNICATION SYSTEM FOR VEHICLE
First Claim
1. A wireless communication system for a vehicle for locking or unlocking a vehicle door, the system comprising:
- a portable device having a manually operable switch and a portable device rolling code, wherein, each time the switch is turned on, the portable device updates the portable device rolling code and transmits a wireless signal including the portable device rolling code;
a vehicle-mounted device having a receiver and a vehicle rolling code, wherein, when the wireless signal is received through the receiver, the vehicle-mounted device compares the portable device rolling code included in the wireless signal with the vehicle rolling code, authenticates the portable device based on a comparison result, and locks or unlocks the vehicle door if the portable device is authenticated; and
a control section mounted in the vehicle-mounted device, the control section controlling locking or unlocking of the vehicle door,wherein, when the control section receives the wireless signal through the receiver, the control section determines whether the most recent locking or unlocking of the vehicle door has been accomplished using a mechanical key and, if it is determined that the most recent locking or unlocking of the vehicle door has been carried out using the mechanical key, the control section locks or unlocks the vehicle door if a specific manipulation of the switch is detected.
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Accused Products
Abstract
A wireless communication system for a vehicle has a portable device that transmits a wireless signal and a vehicle-mounted device that receives the wireless signal from the portable device. Each time a switch in the portable device is turned on, the portable device updates a portable device rolling code and transmits a wireless signal including the portable device rolling code. The vehicle-mounted device receives the wireless signal through a receiver and authenticates the portable device through comparison between the portable device rolling code included in the wireless signal and the vehicle rolling code. The vehicle-mounted device locks or unlocks the vehicle door if the portable device is authenticated. When the wireless signal is received through the receiver after the most recent locking or unlocking of the vehicle door has been carried out using the mechanical key, the vehicle-mounted device locks or unlocks the vehicle door if the switch is turned on for n (n is an integral number greater than or equal to 2) times or more.
67 Citations
14 Claims
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1. A wireless communication system for a vehicle for locking or unlocking a vehicle door, the system comprising:
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a portable device having a manually operable switch and a portable device rolling code, wherein, each time the switch is turned on, the portable device updates the portable device rolling code and transmits a wireless signal including the portable device rolling code; a vehicle-mounted device having a receiver and a vehicle rolling code, wherein, when the wireless signal is received through the receiver, the vehicle-mounted device compares the portable device rolling code included in the wireless signal with the vehicle rolling code, authenticates the portable device based on a comparison result, and locks or unlocks the vehicle door if the portable device is authenticated; and a control section mounted in the vehicle-mounted device, the control section controlling locking or unlocking of the vehicle door, wherein, when the control section receives the wireless signal through the receiver, the control section determines whether the most recent locking or unlocking of the vehicle door has been accomplished using a mechanical key and, if it is determined that the most recent locking or unlocking of the vehicle door has been carried out using the mechanical key, the control section locks or unlocks the vehicle door if a specific manipulation of the switch is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A wireless communication system for a vehicle for locking or unlocking a vehicle door, the system comprising:
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a portable device having a manually operable switch and a portable device rolling code, wherein, each time the switch is turned on, the portable device updates the portable device rolling code and transmits a wireless signal including the portable device rolling code; a vehicle-mounted device having a receiver and a vehicle rolling code, wherein, when the wireless signal is received through the receiver, the vehicle-mounted device compares the portable device rolling code included in the wireless signal with the vehicle rolling code, authenticates the portable device based on a comparison result, and locks or unlocks the vehicle door if the portable device is authenticated; and a control section mounted in the vehicle-mounted device, the control section controlling locking or unlocking of the vehicle door, wherein the control section determines whether the vehicle door has been locked or unlocked using a mechanical key and, if it is determined that the vehicle door has been locked or unlocked using the mechanical key, the control section updates the vehicle rolling code by incrementing the vehicle rolling code by a predetermined value.
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Specification