System and method of updating communications in a security system
First Claim
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1. A vehicle security system, comprising:
- a controller, supported on the vehicle, that controls the security system including a transceiver that generates a first signal and an encoding signal and an antenna coupled to said transceiver for transmitting said first signal and said encoding signal and for receiving signals from outside of said controller;
a vehicle ignition switch coupled to a key slot;
a key that is received in said slot to operate said ignition switch, said key including a transponder that receives and processes said first signal and generates an activation signal responsive to receiving said first signal; and
a transponder initiator that enables said key transponder to generate said activation signal only when said key is received in said slot;
wherein said controller determines whether the vehicle has been in operation for a predetermined minimum amount indicative of time subsequent to said controller receiving and processing said activation signal, and then generates said encoding signal and wherein said transponder receives said encoding signal and modifies said activation signal according to said encoding signal and wherein said control responds to said modified activation signal to subsequently control the security system.
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Abstract
An anti-theft system includes a strategy for providing secure communications between a system controller and a remote signaling device. A communications initiator allows the transfer of information or signals between the system controlling and the remote signaling device only under pre-defined conditions. The system controller preferably includes a transmitter portion for transmitting signals or information to the remote device and a receiver portion for receiving signals from the remote device. Similarly, the remote device preferably includes a transceiver so that two-way communication is accomplished between the controller and the remote signalling device.
48 Citations
20 Claims
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1. A vehicle security system, comprising:
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a controller, supported on the vehicle, that controls the security system including a transceiver that generates a first signal and an encoding signal and an antenna coupled to said transceiver for transmitting said first signal and said encoding signal and for receiving signals from outside of said controller; a vehicle ignition switch coupled to a key slot; a key that is received in said slot to operate said ignition switch, said key including a transponder that receives and processes said first signal and generates an activation signal responsive to receiving said first signal; and a transponder initiator that enables said key transponder to generate said activation signal only when said key is received in said slot; wherein said controller determines whether the vehicle has been in operation for a predetermined minimum amount indicative of time subsequent to said controller receiving and processing said activation signal, and then generates said encoding signal and wherein said transponder receives said encoding signal and modifies said activation signal according to said encoding signal and wherein said control responds to said modified activation signal to subsequently control the security system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A security system, comprising:
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a remote signalling device that includes a transmitter portion that transmits an activation signal from said signalling device and a receiver portion that is capable of receiving signals from a source outside of said signalling device; a controller that controls operation of the security system and includes a transmitter portion that transmits an encoding signal from said controller and a receiver portion that receives said activation signal from said signalling device, said controller controlling the security system responsive to said activation signal received from said signalling device and subsequently determining that an operation condition has existed for a preselected minimum amount indicative of time and then transmits said encoding signal to said signalling device receiver portion and wherein said signalling device modifies said activation signal responsive to the received encoding signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of controlling a vehicle security system that includes a controller supported on the vehicle which controls the system and a remote signalling device that can be carried about by a user, comprising the steps of:
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(A) generating an activation signal using the remote signalling device; (B) controlling an operation of the security system using the controller responsive to the activation signal; (C) determining whether a preselected vehicle operation condition exists after performing step (B); (D) generating an encoding signal using the controller when the preselected operation condition of step (C) exists; (E) updating the activation signal that is generated by the remote signalling device responsive to the encoding signal; and (F) subsequently controlling the operation of the security system using the controller only in response to the updated activation signal from the remote signalling device. - View Dependent Claims (20)
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Specification