Keyless entry system
First Claim
1. A keyless entry system for controlling on-vehicle equipment mounted in a vehicle via a wakeup signal and a command signal, the keyless entry system comprising:
- an on-vehicle unit mounted in the vehicle; and
a mobile device configured to perform radio communication with the on-vehicle unit,wherein the on-vehicle unit is configured to radio-transmit a first transmission signal including the wakeup signal and a second transmission signal associated with detection of an interference with the first transmission signal, the first transmission signal having a first frequency and the second transmission signal having a second frequency different from the first frequency, andwherein the mobile device is configured to receive the first and second transmission signals from the on-vehicle device, the mobile device radio-transmitting a third transmission signal including the command signal to the on-vehicle unit when the first transmission signal has been normally received, andwherein when the first transmission signal has not been normally received, the mobile device performs a detection of an interference wave to the first transmission signal in response to receiving the second transmission signal, and radio-transmits a fourth transmission signal for requesting the on-vehicle unit to retransmit the first transmission signal to the on-vehicle unit.
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Accused Products
Abstract
A keyless entry system includes an on-vehicle unit and a mobile device, and controls on-vehicle equipment using a wakeup signal and a command signal. The on-vehicle unit radio-transmits a first transmission signal including the wakeup signal and a second transmission signal relating to the detection of an interference wave to the first transmission signal to the mobile device using radio signals having different frequencies. When the first transmission signal has been normally received, the mobile device radio-transmits a third transmission signal including the command signal to the on-vehicle unit and receives a second transmission signal. When the first transmission signal could not be normally received, the mobile device performs the detection of the interference wave to the first transmission signal and radio-transmits a fourth transmission signal for requesting the retransmission of the first transmission signal to the on-vehicle unit.
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Citations
4 Claims
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1. A keyless entry system for controlling on-vehicle equipment mounted in a vehicle via a wakeup signal and a command signal, the keyless entry system comprising:
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an on-vehicle unit mounted in the vehicle; and a mobile device configured to perform radio communication with the on-vehicle unit, wherein the on-vehicle unit is configured to radio-transmit a first transmission signal including the wakeup signal and a second transmission signal associated with detection of an interference with the first transmission signal, the first transmission signal having a first frequency and the second transmission signal having a second frequency different from the first frequency, and wherein the mobile device is configured to receive the first and second transmission signals from the on-vehicle device, the mobile device radio-transmitting a third transmission signal including the command signal to the on-vehicle unit when the first transmission signal has been normally received, and wherein when the first transmission signal has not been normally received, the mobile device performs a detection of an interference wave to the first transmission signal in response to receiving the second transmission signal, and radio-transmits a fourth transmission signal for requesting the on-vehicle unit to retransmit the first transmission signal to the on-vehicle unit. - View Dependent Claims (2, 3, 4)
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Specification