Vehicle Communication Device Verification Load Reduction
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Solution Overview
Problem
Existing V2X communication systems face high verification processing loads due to the need to verify all received messages in real time, especially when numerous vehicles are communicating, and current priority determination methods incorrectly classify vehicles as high-priority, increasing unnecessary verification and processing loads.
Innovation Solution
A vehicle communication device that includes a reception unit, an own-vehicle information acquisition unit, a traveling road analysis unit, and a determination unit to assess the urgency of verification processing based on both the own-vehicle and other-vehicle information, thereby reducing the verification load by only processing messages deemed necessary for the own vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If verification processing is performed on all received messages in real time, then security and authenticity are ensured, but the processing load increases and real-time verification becomes impossible when the number of communicating vehicles increases
Solution Approach 1:
The verification process is segmented into two stages: first, priority determination based on message content (position, speed, acceleration, direction) filters messages into high-priority and low-priority groups; second, verification processing is performed only on high-priority messages. This segmentation resolves the contradiction by dividing the verification workload, ensuring security for critical messages while maintaining real-time processing capability.
Solution Approach 2:
Instead of verifying all received messages (excessive action), the system performs verification only on a subset of messages deemed high-priority based on their content and relevance to the own vehicle. This partial action approach maintains verification accuracy for critical messages while reducing overall processing load to achieve real-time verification.
2Loss of time
If priority determination is performed based on vehicle position and movement information, then urgent information is identified, but vehicles on opposing lanes or separated by barriers are incorrectly classified as high-priority, increasing unnecessary verification load
Solution Approach 1:
The system applies different verification criteria based on the local context of each message. By analyzing not only position and movement information but also road geometry, barriers, and lane configurations, the system determines the local relevance of each message to the own vehicle. This local quality assessment ensures that only truly urgent and relevant messages are classified as high-priority, reducing false positives and unnecessary verification load while maintaining fast information acquisition.
Data Source
AI summary
Traveling road information including traveling roads of another vehicle and the own vehicle is acquired on the basis of own-vehicle information and other-vehicle information received by a reception unit. Whether or not verification processing is needed for verification information accompanying the other-vehicle information received by the reception unit is determined on the basis of the traveling road information and the other-vehicle information. Thus, a message unnecessary for the own vehicle is not subjected to verification, so that the load on the vehicle communication device is reduced.