Vehicle Switch Device Protocol Adaptation for Abnormal ECU Recovery
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Solution Overview
Problem
Existing on-vehicle network systems face challenges in maintaining stable communication when an abnormality is detected in an ECU, as recovery times can be lengthy, impacting driving support and automated driving processes.
Innovation Solution
An on-vehicle communication system that includes switch devices equipped with detection and change units. These units detect abnormalities in function units and perform a protocol change process, allowing the system to continue communication by switching to a different protocol or path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system waits for the abnormal function unit to recover to the original protocol, then communication stability is maintained, but communication interruption occurs during the recovery period
Solution Approach 1:
The system dynamically switches the communication protocol from the original protocol to an alternative protocol when an abnormality is detected in a function unit. This dynamic adaptation allows communication to continue without interruption while the abnormal function unit recovers, resolving the contradiction between maintaining communication stability and avoiding communication interruption time loss.
Solution Approach 2:
The system changes the protocol parameter from the original protocol to a different protocol when communication abnormalities are detected. This parameter change enables the system to maintain reliable communication during the recovery period of the abnormal function unit, eliminating communication interruptions while preserving communication stability.
2Productivity
If the system continues communication with the abnormal function unit using a different protocol, then communication continuity is maintained, but protocol compatibility issues may arise
Solution Approach 1:
The system introduces a protocol translation or adaptation mechanism that acts as an intermediary between the abnormal function unit and the rest of the network. This intermediary enables communication continuity by translating between the alternative protocol and the standard protocol, maintaining productivity while managing protocol compatibility without requiring complex multi-protocol support across all devices.
3Loss of time
If the system switches to an alternative protocol immediately upon detecting abnormality, then communication interruption is avoided, but detection accuracy requirements increase
Solution Approach 1:
The system performs preliminary monitoring and detection of communication abnormalities before they cause complete failure. By detecting early signs of abnormality and switching to an alternative protocol proactively, the system avoids communication interruptions while allowing sufficient time for accurate abnormality detection, reducing the pressure on detection accuracy thresholds.
Data Source
AI summary
This on-vehicle communication system is an on-vehicle communication system including one or a plurality of switch devices each configured to relay data between a plurality of function units mounted to a vehicle. The on-vehicle communication system includes: a detection unit configured to detect an abnormality regarding a function unit; and a change unit configured to, when an abnormality has been detected by the detection unit, perform a protocol change process of causing the function unit for which the abnormality has been detected, to change a protocol that is used.