In-Vehicle ECU Update Control During Temporary Stops
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Solution Overview
Problem
Existing in-vehicle ECU update systems require vehicles to be intentionally parked, which is inconvenient and disrupts over-the-air (OTA) updates, especially for urgent updates that need to be performed immediately.
Innovation Solution
An update control device that inquires about and determines the feasibility of updating an in-vehicle ECU during temporary stops, such as at traffic lights or railroad crossings, by calculating the required update time and comparing it with the stop time, allowing updates without intentionally parking the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the update is performed during intentional parking, then the update can be completed reliably, but the convenience and efficiency of OTA updates deteriorate
Solution Approach 1:
The update control device performs preliminary actions by downloading and storing update data in advance during vehicle operation, and prepares the update environment by checking dependency ECU states before the actual update. This allows the update to be executed quickly during temporary stops without requiring intentional parking, thus maintaining both reliability and convenience.
Solution Approach 2:
The system dynamically adapts the update execution timing based on real-time vehicle stop conditions. Instead of requiring fixed intentional parking, the device detects temporary stops (e.g., at traffic lights) and dynamically determines whether to execute the update based on stop duration and dependency ECU availability, making the update process flexible and convenient while ensuring reliability.
2Ease of operation
If the update is performed during temporary stops, then the convenience of OTA updates is improved, but the update may not complete reliably due to insufficient time
Solution Approach 1:
The update control device performs preliminary actions by downloading and storing update data in advance during vehicle operation, and prepares the update environment by checking dependency ECU states before the actual update. This allows the update to be executed quickly during temporary stops without requiring intentional parking, thus maintaining both reliability and convenience.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring the update progress and comparing it with the remaining stop time. The update control device receives feedback from dependency ECUs about their operational states and uses this feedback to determine whether to proceed with or postpone the update, ensuring reliable completion while maximizing convenience.
3Loss of time
If the update data is downloaded during vehicle operation, then the update preparation time is reduced, but the communication time required increases
Solution Approach 1:
The system maintains continuous useful action by downloading update data during vehicle operation whenever communication opportunities arise, rather than waiting for stops. This continuous background data preparation reduces the critical path time during actual update execution, optimizing the balance between communication time investment and update preparation time savings.
Data Source
AI summary
An update control device determines whether or not an update of an update target ECU is to be completed within stop time from when a vehicle temporarily stops until the vehicle starts traveling, when a response indicating that the update can be executed is given from an in-vehicle ECU having dependency with the update target in-vehicle ECU.