Changing Code Learning Transmitter for Legacy Protocol Compatibility
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Solution Overview
Problem
Existing movable barrier operators, such as garage door openers, face compatibility issues when users with vehicles equipped with learning transmitters that use unidirectional communication protocols attempt to interface with newer models employing bidirectional security protocols, leading to operational incompatibilities.
Innovation Solution
A method and system that enables learning of a learning transmitter by a movable barrier operator using a legacy learning process, allowing the operator to communicate with the learning transmitter via a first communication protocol while adapting the learning transmitter to use a second, bidirectional protocol, thereby facilitating compatibility and secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable barrier operator uses a bidirectional security protocol, then security is improved, but compatibility with legacy learning transmitters using unidirectional protocols deteriorates
Solution Approach 1:
The patent introduces a bidirectional communication protocol as an intermediary layer between the legacy unidirectional transmitter and the modern barrier operator. The system includes a receiver that can operate in both unidirectional mode (for legacy compatibility) and bidirectional mode (for enhanced security), acting as a mediator that translates between the two communication paradigms.
Solution Approach 2:
The communication protocol is made dynamic by allowing the barrier operator to switch between unidirectional and bidirectional modes based on the type of transmitter being used. The system dynamically adapts its communication behavior - using simple receive-only mode for legacy transmitters and full bidirectional challenge-response mode for modern transmitters, thus maintaining both security and compatibility.
2Ease of operation
If a learning transmitter uses unidirectional communication, then ease of operation is improved, but security deteriorates
Solution Approach 1:
The system provides self-service security by automatically detecting whether a transmitter is legacy or modern and adjusting the communication protocol accordingly. The barrier operator autonomously determines the appropriate security level and communication mode without requiring user intervention, maintaining ease of operation while adapting security measures to the capabilities of the transmitter being used.
Data Source
AI summary
In one aspect, a method is provided of effecting secure communications for a movable barrier operator and a trainable transmitter. The method includes, at the movable barrier operator, transmitting to a remote control a first radio frequency communication via a first communication protocol wherein the first radio frequency communication includes an access code. The method further includes receiving from the trainable transmitter a second radio frequency communication via a second communication protocol. The second radio frequency communication includes a derived access code based at least in part upon the access code. The method further includes learning the trainable transmitter in response to the derived access code corresponding to the access code.