Bus Message Filtering via Hierarchical Filter Groups
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Solution Overview
Problem
Current data processing methods for bus systems, such as CAN bus systems, lack flexibility and security in filtering messages, as they often require predefined and rigid filter rules, which can lead to increased complexity and reduced authorization levels.
Innovation Solution
The method involves creating multiple filter groups with distinct filter rules, allowing for flexible and hierarchical filtering by sequentially evaluating rules across different groups, assigning different access rights and functionalities, and enabling OR or AND linkages between groups for message processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple filter groups with hierarchical structure are implemented, then message filtering flexibility and security are improved, but device complexity increases
Solution Approach 1:
The filtering system is divided into multiple filter groups (first filter group, second filter group, etc.), where each group contains specific filter rules. This segmentation allows independent configuration and management of different filtering criteria, improving flexibility while maintaining manageable complexity through modular organization.
Solution Approach 2:
The patent introduces a hierarchical dimension to message filtering by implementing sequential evaluation across multiple filter groups. Messages are evaluated against the first filter group, then the second filter group, and so on, adding a temporal/sequential dimension to the filtering process that enhances security and flexibility without proportionally increasing complexity.
2Reliability
If multiple filter groups with sequential evaluation are implemented, then message filtering security is improved, but processing time increases
Solution Approach 1:
Filter rules are pre-configured and organized into hierarchical groups before runtime. The system performs preliminary setup of filtering criteria, allowing sequential evaluation to proceed efficiently during message processing without requiring complex runtime decision-making, thus balancing security with processing speed.
Data Source
AI summary
A method for processing data associated with messages transmittable via a bus system. The method includes: providing multiple filter groups, each filter group of the multiple filter groups including at least one filter rule, for example, for at least some of the messages, filtering at least one message with the aid of at least two different filter groups of the multiple filter groups.