Vehicle Digital Key Signaling for Long-Running Remote Functions
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Solution Overview
Problem
Existing communication methods between vehicles and mobile devices fail to account for long-lasting processes and high processing loads, leading to unintentional cancellation of remote key events due to predefined time limits.
Innovation Solution
A method for signaling a communication state in vehicles using Bluetooth or Bluetooth Low Energy, where the vehicle sends signals to the mobile device indicating ongoing or pending status of long-lasting functions, allowing extension of time limits and ensuring completion of functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a predefined time limit is set for reporting back status messages, then communication reliability is improved, but long-lasting processes are interrupted causing unintentional cancellation
Solution Approach 1:
The patent applies dynamics by making the time limit adjustable rather than fixed. The control device dynamically adapts the time limit based on the actual duration requirements of the process being executed. When a long-lasting process is detected, the time limit is extended accordingly, allowing the process to complete without unintentional cancellation while maintaining communication reliability for shorter processes.
Solution Approach 2:
The patent changes the parameter of time limit from a static predefined value to a dynamic value that can be modified based on process characteristics. The control device monitors process duration and adjusts the time limit parameter accordingly, ensuring it is sufficient for long-lasting processes while maintaining the reliability benefits of time limits for normal operations.
2Measurement precision
If the vehicle waits for process completion before responding, then accuracy is improved, but response time increases causing timeout errors
Solution Approach 1:
The patent applies preliminary action by providing an intermediate status response before the process is fully complete. When the control device detects that a process will exceed the time limit, it sends an intermediate status message indicating the process is still ongoing. This allows the mobile device to extend its timeout period without waiting for full completion, reducing response time loss while maintaining accurate status reporting.
Solution Approach 2:
The patent implements feedback by continuously monitoring process duration and providing status updates to the mobile device. The control device sends intermediate status messages during long-lasting processes, allowing the mobile device to adjust its timeout behavior based on real-time feedback about process progress, thereby reducing unnecessary waiting time while maintaining accuracy.
Data Source
AI summary
A method for signaling a communication state for a motor vehicle. The motor vehicle comprises a control device and a communication device. The control device is configured to communicate with a mobile device via the communication device. The mobile device has an authenticated digital key valid for the motor vehicle. The method is performed by the control device. The method includes receiving a first signal from the mobile device via the communication device indicating a remote control key event. The method includes causing a start of an execution of a function associated with the remote control key event on the motor vehicle. The method includes sending a second signal to the mobile device, when the execution of the function continues for a period of time longer than a predetermined period of time, to signal that the execution of the instruction is continuing.