System and method of training in a transmit/receive system
First Claim
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1. A device for coupling to a vehicle and for training to activate a remote system, comprising:
- a radio frequency transmitter having a training mode and an operational mode;
wherein the radio frequency transmitter is configured to identify a rolling code encryption algorithm for use with the remote system from a plurality of rolling code encryption algorithms;
wherein the radio frequency transmitter is further configured to synchronize a rolling code count of the remote system with a rolling code count of the radio transmitter during the training mode by transmitting, in response to a single user input, at least two messages having sequential encrypted rolling code values in accordance with the identified rolling code encryption algorithm;
wherein the radio frequency transmitter is configured to transmit a next encrypted rolling code in the sequence with the first transmission of the operational mode.
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Abstract
A radio frequency transmitter is configured to send radio frequency messages to activate a remote system. Each message includes an encrypted counter value and a transmitter identifier. The transmitter is configured to send at least two of the messages having sequential encrypted counter values in response to a single user input.
29 Citations
20 Claims
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1. A device for coupling to a vehicle and for training to activate a remote system, comprising:
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a radio frequency transmitter having a training mode and an operational mode; wherein the radio frequency transmitter is configured to identify a rolling code encryption algorithm for use with the remote system from a plurality of rolling code encryption algorithms; wherein the radio frequency transmitter is further configured to synchronize a rolling code count of the remote system with a rolling code count of the radio transmitter during the training mode by transmitting, in response to a single user input, at least two messages having sequential encrypted rolling code values in accordance with the identified rolling code encryption algorithm; wherein the radio frequency transmitter is configured to transmit a next encrypted rolling code in the sequence with the first transmission of the operational mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13)
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10. A method of providing a counter value and a transmitter identifier to a receiver configured to control a system, comprising:
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in a training mode, identifying a rolling code encryption algorithm for use with the receiver from a plurality of rolling code encryption algorithms; in the training mode, receiving a single user input; in response to the single user input, transmitting a plurality of sequential encrypted counter values, in accordance with the identified rolling code encryption algorithm, to the receiver; and in an operating mode, transmitting a next sequential encrypted counter value in response to a user input. - View Dependent Claims (11, 12, 14, 15, 16)
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17. A radio frequency remote control system, comprising:
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a receiver; and a transmitter integrated into a vehicle interior element and configured to identify a rolling code encryption algorithm for use with the receiver from a plurality of rolling code encryption algorithms and configured to send at least two sequential encrypted rolling code messages in response to one user input and in accordance with the identified rolling code encryption algorithm; wherein the receiver is configured to synchronize with the transmitter by decrypting the sequential encrypted rolling code messages and checking for whether the counters obtained by the decryptions are sequential according to the encryption and decryption algorithms used by the radio frequency remote control system. - View Dependent Claims (18, 19, 20)
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Specification