Vehicle Information Priority Switching Index
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Solution Overview
Problem
Existing inter-vehicle communication-based drive support systems face challenges in providing timely and accurate information to drivers due to frequent information switching and delays, leading to difficulties in recognizing displayed information, especially when vehicles are dynamic objects with changing positions and speeds.
Innovation Solution
An other vehicle information providing device that calculates an information switching index value based on the latest, previous, and predicted priorities, using a priority memory and information switching index value calculation means to determine the timing of information switching, thereby reducing frequent switching and ensuring timely and accurate information delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If priority is switched frequently to provide high-priority information timely, then information timeliness is improved, but information recognition stability deteriorates
Solution Approach 1:
The system performs preliminary actions by storing not only the latest priority but also the previous priority and predicting future priority before actual switching occurs. This allows the system to anticipate priority changes and plan information switching in advance, reducing frequent switching while maintaining timeliness. The prediction of future priority based on historical data enables proactive decision-making about when to switch information display.
Solution Approach 2:
The invention introduces an intermediary mechanism - the information switching index - that mediates between the need for timely information provision and stable recognition. This index is calculated based on multiple time points (past, present, future priorities) and serves as a buffer that smooths out frequent priority fluctuations, allowing the system to switch information only when the index indicates appropriate timing rather than immediately responding to every priority change.
2Measurement precision
If priority calculation is performed frequently to track dynamic vehicle positions and speeds, then information accuracy is improved, but switching frequency increases
Solution Approach 1:
The system performs preliminary priority calculations at multiple time points (previous time, current time, and predicted future time) before actual information switching occurs. This allows the system to smooth out transient fluctuations in priority values caused by dynamic vehicle movements, reducing unnecessary switching frequency while maintaining accurate tracking of relevant vehicles.
Solution Approach 2:
The information switching index acts as an intermediary that filters out noise from frequent priority recalculations. By basing switching decisions on this indexed value rather than raw priority calculations, the system reduces switching frequency while still responding to genuine changes in vehicle priority, thus balancing measurement precision with productivity.
3Reliability
If information switching timing is delayed to ensure recognition time, then recognition stability is improved, but information timeliness deteriorates
Solution Approach 1:
The system performs preliminary actions by predicting future priority and calculating the information switching index in advance. This allows the system to determine optimal switching timing before actual switching occurs, ensuring that information is provided timely while giving drivers sufficient recognition time. The advance calculation of switching timing based on predicted priorities prevents both premature and delayed switching.
Data Source
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Figure 3(a)~4(c)
AI summary
An other vehicle information providing device provides information on other vehicles which a driver can always recognize, based on positional information on vehicles obtained by inter-vehicle communication. The device assigns priority to a plurality of other vehicle informations inputted to the own vehicle and provides the other vehicle information having high priority. The other vehicle information providing device includes: a priority memory means 22 which stores the latest priority and previous priority; an information switching index value calculation means 23 which predicts future priority based on the latest priority and the previous priority stored in the priority memory means 22 and calculates an information switching index value based on the latest priority, the previous priority and the future priority; and an information providing means 30 which provides other vehicle information based on the information switching index value.