Vehicle Access Control During ECU Update Communication Failures
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Solution Overview
Problem
Passengers are unable to unlock or start their vehicles during program updates due to communication failures between mobile devices and vehicle systems, leading to inconvenience and safety risks.
Innovation Solution
A vehicle control system that manages program updates based on communication states with mobile devices and cameras, allowing different operations when communication is enabled or disabled, and includes notification and control mechanisms to handle failures effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If program update is performed in the electronic control device, then the system functionality is improved, but the passenger cannot unlock or start the vehicle during the update
Solution Approach 1:
The system performs preliminary actions by notifying the passenger before the program update starts and providing guidance on what to do. The update management device sends notifications to the mobile device in advance, allowing the passenger to prepare for the update process and understand that vehicle access may be temporarily affected.
Solution Approach 2:
The system implements feedback by providing real-time status information to the passenger through the mobile device. The update management device communicates the current state of the program update (in progress, completed, or failed) and provides appropriate guidance based on the status, allowing the passenger to understand what is happening and what actions to take.
2Reliability
If communication with mobile device is required for update management, then update control is improved, but the system becomes more complex
Solution Approach 1:
The mobile device serves multiple functions: it acts as both a notification receiver and a communication channel for update management. The same device that the passenger uses for vehicle access (electronic key) is also used to receive update notifications and guidance, eliminating the need for separate communication infrastructure.
Solution Approach 2:
The system uses the passenger's existing mobile device for communication purposes rather than requiring additional vehicle-mounted communication systems. The mobile device that already exists in the passenger's possession is leveraged to receive notifications and guidance, reducing overall system complexity.
3Reliability
If the vehicle locks during program update, then security is improved, but the passenger is stranded if communication fails
Solution Approach 1:
The system performs preliminary actions by notifying the passenger before the program update starts and providing guidance on what to do. The update management device sends notifications to the mobile device in advance, allowing the passenger to prepare for the update process and understand that vehicle access may be temporarily affected.
Solution Approach 2:
The system implements feedback by providing real-time status information to the passenger through the mobile device. The update management device communicates the current state of the program update (in progress, completed, or failed) and provides appropriate guidance based on the status, allowing the passenger to understand what is happening and what actions to take.
Data Source
AI summary
The vehicle control system includes a key authentication ECU, an image authentication ECU, and a central ECU that performs a first operation when update processing that updates a program to be executed by the image authentication ECU fails and if communication between the key authentication ECU and the mobile device is communication-enabled and performs a second operation when the update processing fails and if communication between the key authentication ECU and the mobile device is communication-disabled, the second operation being different from the first operation.