Gateway Apparatus Bus Matching for Abnormal Data Frame Detection
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Solution Overview
Problem
In vehicle communication networks, unauthorized electronic control units can connect and transmit invalid data frames, which may be mistakenly processed as legitimate, leading to erroneous recognition and malfunction, highlighting the need for efficient monitoring and detection of abnormal data frames.
Innovation Solution
A gateway apparatus connected to multiple buses that receives data frames, determines whether they are monitoring targets based on stored information, and performs abnormality detection only when the reception bus matches the intended transmission source bus, reducing unnecessary processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If abnormality detection is performed on all received data frames, then detection reliability is improved, but processing load increases
Solution Approach 1:
The patent segments the data frame monitoring process into two distinct paths: monitoring target data frames and non-monitoring target data frames. The controller selectively performs abnormality detection only on monitoring target data frames by comparing reception bus information with stored transmission source bus information, while simply relaying non-monitoring target data frames without detection. This segmentation resolves the contradiction by maintaining high detection reliability for critical frames while improving overall processing efficiency through selective monitoring.
2Measurement precision
If monitoring target information is stored for all data frames, then detection precision is improved, but storage requirements and processing complexity increase
Solution Approach 1:
The patent applies local quality by assigning different monitoring levels to different data frames based on their importance. Monitoring target information is stored only for specific data frames that require abnormality detection, identified by matching data frame identifiers with stored monitoring target identifiers. This selective approach improves detection precision for critical frames while reducing storage requirements and processing complexity compared to monitoring all frames equally.
Data Source
AI summary
A gateway apparatus is connected to a plurality of buses. A data frame is received by using one of the plurality of buses as a reception bus. Whether the received data frame is a monitoring target data frame is determined based on monitoring target information. The monitoring target information is stored in a storage to associate the monitoring target data frame with a monitoring target transmission source bus connected to a transmission source electronic control unit. Whether the reception bus matches the monitoring target transmission source bus is determined based on the monitoring target information in response to determining that the received data frame is a monitoring target data frame. An abnormality detection on the received data frame is performed in response to determining that the reception bus matches the monitoring target transmission source bus.