Vehicle Network Message Detection with Multi-Stage Improper Message Judgment
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Solution Overview
Problem
Existing vehicle-mounted network systems face challenges in accurately determining whether messages transmitted are improper, leading to potential erroneous judgments.
Innovation Solution
A detection apparatus and method that includes a message acquisition unit and a determination unit capable of outputting a second determination result in addition to a first, allowing for more accurate identification of improper messages by performing different processing based on the determination results, using statistical values and thresholds tailored to vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single determination result is output to indicate whether a message is improper, then the detection process is simple and fast, but the detection accuracy is insufficient leading to erroneous determinations
Solution Approach 1:
The determination process is divided into multiple independent determination units, each performing a specific type of analysis (e.g., rule-based determination, statistical determination, machine learning-based determination). Each unit outputs a separate determination result, and these results are integrated to form a final comprehensive determination. This segmentation allows each unit to specialize in detecting specific types of improper messages, thereby improving overall detection accuracy while maintaining manageable complexity through modular design.
Solution Approach 2:
An intermediary integration mechanism is introduced to combine multiple determination results. This intermediary layer processes the outputs from various determination units, resolves conflicts between different determination results, and produces a final comprehensive determination. The intermediary acts as a mediator that synthesizes information from multiple sources, improving detection accuracy by considering multiple perspectives without requiring complete redesign of the entire determination system.
2Reliability
If multiple determination results are output to improve detection accuracy, then the detection precision increases, but the processing time and system complexity increase
Solution Approach 1:
The determination units are configured to operate periodically or at different stages of message processing. Critical determination units that provide quick assessments operate first with shorter processing cycles, while more thorough determination units operate subsequently with longer processing cycles. This periodic action allows the system to produce preliminary determination results quickly while still performing comprehensive analysis, thereby improving detection reliability without excessively increasing processing time for all messages.
Solution Approach 2:
The system performs partial determination actions on all messages through lightweight determination units, and excessive or full determination actions only on messages that require deeper analysis. Determination units are selectively activated based on message characteristics, sender reputation, or preliminary assessment results. This approach ensures that most messages are processed efficiently with minimal overhead, while maintaining high detection reliability for suspicious messages that warrant more thorough examination.
Data Source
AI summary
A detection apparatus detects an improper message on a vehicle-mounted network mounted in a vehicle. The detection apparatus includes: a message acquisition unit that acquires a transmission message on the vehicle-mounted network; and a determination unit that performs a determination relating to improper messages on the vehicle-mounted network by performing a determination on the transmission message acquired by the message acquisition unit. The determination unit is capable of outputting a second determination result relating to the transmission message in addition to a first determination result indicating whether or not the transmission message acquired by the message acquisition unit is an improper message.