Security system for a vehicle and method of operating same
AssigneeStrattec Security Corporation
InventorsDavid C. Janssen, Henry Wagner, Robert Buczkiewicz
Life of this patent
Estimating the term…
Abstract
A security system for a vehicle comprising a frame and a combination remote keyless entry and passive security system including at least one antenna mounted on the frame.
Claims27
A method of allowing entry into a vehicle including a frame and a vehicle entry system, the frame including at least one vehicle door and a respective latch mechanism, both mounted on the frame, the latch mechanism having a latch movable between a secured state preventing opening of the respective door and an unsecured state allowing opening of the respective door, and the vehicle entry system including a vehicle controller, at least one vehicle antenna associated with the vehicle door and a fob having a fob antenna, the method comprising the acts of:
- generating a challenge signal including a challenge data packet;
- transmitting the challenge signal from the vehicle antenna;
- receiving the challenge signal at the fob antenna;
- generating a response signal having a response data packet in response to receiving the challenge signal;
- transmitting the response signal from the fob antenna;
- receiving the response signal at the vehicle antenna;
- changing the state of the latch from the secured state to the unsecured state in response to receiving the response signal;
- wherein the vehicle controller includes a vehicle identification (VID) number, and
- wherein the act of generating a challenge signal includes the acts of:
- providing a random number having digits;
- providing challenge data having digits, the challenge data including the VID;
- and
- combining the challenge data with the random number to form a challenge data packet.
A method of allowing entry into a vehicle including a frame and a vehicle entry system, the frame including at least one vehicle door and a respective latch mechanism, both mounted on the frame, the latch mechanism having a latch movable between a secured state preventing opening of the respective door and an unsecured state allowing opening of the respective door, and the vehicle entry system including a vehicle controller, at least one vehicle antenna associated with the vehicle door and a fob having a fob antenna, the method comprising the acts of:
- transmitting a challenge signal including a challenge data packet from the vehicle antenna;
- receiving the challenge signal at the fob antenna;
- generating a response signal having a response data packet in response to receiving the challenge signal;
- transmitting the response signal from the fob antenna;
- receiving the response signal at the vehicle antenna;
- changing the state of the latch from the secured state to the unsecured state in response to receiving the response signal;
- and
- authenticating the challenge data packet in the fob after receiving the challenge data signal and before generating the response signal.
A method of allowing entry into a vehicle including a frame and a vehicle entry system, the frame including at least one vehicle door and a respective latch mechanism, both mounted on the frame, the latch mechanism having a latch movable between a secured state preventing opening of the respective door and an unsecured state allowing opening of the respective door, and the vehicle entry system including a vehicle controller, at least one vehicle antenna associated with the vehicle door and a fob having a fob antenna, the method comprising the acts of:
- transmitting a challenge signal including a challenge data packet from the vehicle antenna;
- receiving the challenge signal at the fob antenna;
- generating a response signal having a response data packet in response to receiving the challenge signal;
- transmitting the response signal from the fob antenna;
- receiving the response signal at the vehicle antenna;
- and
- changing the state of the latch from the secured state to the unsecured state in response to receiving the response signal;
- and
- wherein the fob controller includes a fob identification (FID) number, and wherein the act of generating a response signal includes the acts of:
- providing a random number having digits, the random number being generated from a one of the vehicle controller and the fob;
- providing a response data packet having digits, the response data packet including the FID;
- generating a calculated number having digits using the random number;
- and
- combining the response data packet with the calculated number.
A method of allowing entry into a vehicle including a frame and a vehicle entry system, the frame including at least one vehicle door and a respective latch mechanism, both mounted on the frame, the latch mechanism having a latch movable between a secured state preventing opening of the respective door and an unsecured state allowing opening of the respective door, and the vehicle entry system including a vehicle controller having at least one vehicle antenna associated with the vehicle door, a vehicle identification (VID) number, and at least one stored fob identification (FID) number, and a fob having a fob antenna, a FID number, and a stored VID number, the method comprising the acts of:
- generating a challenge signal including a challenge data packet having the VID number;
- transmitting the challenge signal from the vehicle antenna;
- receiving the challenge signal at the fob antenna;
- authenticating the challenge data packet in the fob in response to receiving the challenge signal, the act of authenticating includes the act of determining if the VID number of the challenge data packet is the same as the stored VID number of the fob;
- generating a response signal including a response data packet having the FID number if the challenge data packet has been authenticated;
- transmitting the response signal from the fob antenna;
- receiving the response signal at the vehicle antenna;
- authenticating the response data packet in the vehicle controller in response to the response signal, the authenticating act including the act of determining if the FID number of the response data packet is the same as the stored FID number of the vehicle controller;
- and
- changing the state of the latch from the secured state to the unsecured state if the act of authenticating the response data packet has been met.
A method of allowing entry into a vehicle including a frame and a vehicle entry system, the frame including at least one vehicle door and a respective latch mechanism, both mounted on the frame, the latch mechanism having a latch movable between a secured state preventing opening of the respective door and an unsecured state allowing opening of the respective door, and the vehicle entry system including a vehicle controller, at least one vehicle antenna associated with the vehicle door and a fob having a fob antenna, the method comprising the acts of:
- providing a microprocessor in the fob, the microprocessor having a sleep mode wherein power consumption by the microprocessor is low, and an operating mode wherein power consumption by the microprocessor is higher than in the sleep mode;
- providing a challenge signal having a challenge data packet to the fob;
- authenticating the challenge signal by successively applying a series of criteria to the challenge signal;
- and
- determining whether to bring the microprocessor out of the sleep mode.
Dependencies are inferred from the claim text.