In-Vehicle Relay Control During New Node Network Setup
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Solution Overview
Problem
Dynamic changes in in-vehicle network settings can affect communication stability.
Innovation Solution
A relay device with detection, authentication, and control units to restrict and manage frame relay processing during network configuration changes, ensuring stable operation by preventing new functional units from disrupting existing communication until setting processing is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay processing is permitted for all frames from new functional units, then communication adaptability is improved, but network stability deteriorates due to potential disruptions during setting processing
Solution Approach 1:
The relay device dynamically adjusts its relay processing behavior based on the operational state of new functional units. When a new functional unit is detected, the device transitions to a restricted relay mode that only permits setting frames. After successful setting processing, it transitions to full relay mode. This dynamic state-based control resolves the contradiction by adapting relay permissions to the current network condition.
Solution Approach 2:
The system performs setting processing for new functional units before permitting full relay processing. This preliminary action ensures that all necessary configuration parameters are established and validated before the new unit begins normal communication operations, preventing potential disruptions to network stability while maintaining adaptability.
2Reliability
If relay processing is restricted for new functional units, then network stability is improved, but communication efficiency deteriorates due to limited frame transmission
Solution Approach 1:
The relay processing function is segmented into two distinct operational modes: restricted relay mode for setting frames only, and full relay mode for all frames. This segmentation allows the system to apply different relay policies based on the functional state, ensuring network stability during configuration while maintaining communication efficiency during normal operation.
Solution Approach 2:
The system maintains continuous useful action by ensuring that setting processing completes successfully before transitioning to full relay mode. This continuity ensures that the network always operates in a stable state with properly configured functional units, preventing interruptions while maintaining efficient communication once setup is complete.
3Reliability
If setting processing is performed for new functional units, then communication reliability is improved, but processing time increases due to additional configuration steps
Solution Approach 1:
The system applies preliminary anti-action by proactively performing setting processing and validation before the new functional unit begins full communication operations. This prevents potential communication errors and instability that would require troubleshooting and correction later, thereby improving long-term reliability while minimizing total time loss through prevention rather than correction.
Data Source
AI summary
A relay device for use in an in-vehicle network that includes a plurality of functional units, the relay device includes: a relay unit configured to perform relay processing for relaying frames transmitted and received between the functional units; a detection unit configured to detect addition of a functional unit to the in-vehicle network; and a control unit configured to restrict the relay processing of frames transmitted from a new functional unit, which is the functional unit detected by the detection unit, except for a frame used for setting processing for enabling communication in a new network, which is the in-vehicle network further including the new functional unit, and to relax the restriction on the relay processing when the setting processing is completed.