In-Vehicle Access Policy Updates Gated by Safe Vehicle State
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Solution Overview
Problem
Existing in-vehicle systems face challenges in safely updating access authorization policies, which can lead to unexpected operations or non-operations due to changes in access criteria before and after updates.
Innovation Solution
An in-vehicle system with a coordination control unit that determines access rights using an access authorization policy, checks for update necessity, assesses the vehicle's safe state, and implements updates only when both conditions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the access authorization policy is updated frequently to meet various needs, then the adaptability of the system is improved, but the risk of unexpected operations or non-operations increases due to changes in access criteria
Solution Approach 1:
The system determines whether the vehicle is in a safe state before implementing the access authorization policy update. This preliminary check ensures that updates are only applied when the vehicle is stationary or in a state where unexpected operations can be safely handled, thus maintaining system reliability while allowing frequent policy updates for adaptability.
2Productivity
If the access authorization policy is updated while the vehicle is in operation, then the system responds timely to new requirements, but unexpected operations or non-operations may occur due to changes in access criteria
Solution Approach 1:
The system performs a preliminary determination of the vehicle's safe state before applying the policy update. This ensures that updates are timed appropriately - either when the vehicle is stationary or when it's safe to handle potential unexpected operations - thus maintaining both timely response and system reliability.
3Reliability
If the access authorization policy is updated only when the vehicle is in a safe state, then system safety is maintained, but the update timing may be delayed
Solution Approach 1:
The system continuously monitors the vehicle's operational state and prepares policy updates in advance. When a safe state is detected, the update is immediately applied without unnecessary delay. This approach maintains system safety while minimizing update delays by being ready to act as soon as conditions permit.
Data Source
AI summary
An in-vehicle system includes function blocks, each mounted on one of electronic control units connected to an in-vehicle network, or on an external device, each configured to execute a predetermined process; and a coordination control unit implementing coordination between the plurality of function blocks. The coordination control unit is configured to, upon receiving an access request from a use source block to a use destination block, determine whether the use source block has access right to the use destination block using an access authorization policy, and to transmit the access request to the use destination block; determine whether to be in an update necessity state where there is a need to implement an update to the access authorization policy; determine whether a state of the vehicle equipped with the in-vehicle network is in a safe state; and implement the update to the access authorization policy.