Vehicle Digital Key Transfer Gating by Server Communication Status

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Solution Overview

Problem

Existing wireless digital key systems face inconvenience when a new owner device cannot communicate with the server during the changing operation, leading to incomplete processing.

Innovation Solution

A managing device that displays candidates for the new owner device based on their communication status with the server, allowing or disabling the changing operation accordingly, and pauses or restarts the operation if communication is lost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the changing operation is allowed to proceed without checking communication status, then the operation can be completed quickly, but the changing may fail if communication with the server is poor

Engineering Contradiction:

Improvechanging operation speedVSAvoidchanging operation success rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system checks the communication status with the server before allowing the changing operation to proceed. This preliminary verification ensures that the terminal can communicate with the server during the operation, preventing failure due to poor communication. The display form changes based on communication status, showing only terminals with good communication as selectable options.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the system checks communication status before allowing changing operation, then the reliability of changing is improved, but the operation becomes more complex

Engineering Contradiction:

Improvechanging operation success rateVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system continuously monitors communication status and provides feedback by changing the display form based on whether communication is possible or poor. When communication is possible, the terminal is displayed as selectable; when communication is poor, it is displayed as non-selectable. This feedback mechanism guides the user's changing operation without requiring complex manual checks.

Inventive Principle:

Principle #23Feedback

3Ease of operation

If the candidate terminal is always displayed as selectable, then the ease of operation is improved, but incorrect selections may occur when communication is poor

Engineering Contradiction:

Improveterminal selection easeVSAvoidselection accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The display form of each candidate terminal is adjusted individually based on its communication status with the server. Terminals with possible communication are displayed with a selectable form (e.g., normal button appearance), while terminals with poor communication are displayed with a non-selectable form (e.g., grayed out or disabled appearance). This local differentiation allows users to easily identify suitable terminals without complex warnings.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12464592B2Managing device, managing method, and recording medium on which managing program is recorded

Publication Date: 2025.11.04 TOYOTA JIDOSHA KK

AI summary

A managing device that is configured to: in response to receiving a changing operation of a terminal at which key operation of a vehicle is possible, display, on a display, a candidate for a terminal that can communicate with the vehicle and at which key operation of the vehicle is possible, and display the candidate on the display in a display form that makes the changing operation possible in a case in which a communication status with a server corresponding to the candidate is that communication is possible, and that makes the changing operation impossible in a case in which a communication status with a server corresponding to the candidate is that communication is poor.