Drive Support System Error Area Memory
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Solution Overview
Problem
Existing drive support systems face challenges in providing accurate drive support information due to high costs associated with highly accurate map matching and potential discrepancies between mapped and actual road conditions, leading to erroneous notifications and communication failures.
Innovation Solution
A drive support system that determines the degree of drive support information based on positional information accuracy, limiting the offer of drive support information when errors exceed a predetermined level and using error occurrence area memory to store and update areas with high positional errors, allowing for continuous and reliable information delivery even with low accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If highly accurate map matching is performed to prevent erroneous notification, then the accuracy of positional information is improved, but the cost becomes expensive
Solution Approach 1:
The patent applies local quality by storing error occurrence areas (low accuracy zones) in advance in the map information storage unit. Instead of uniformly applying high-precision map matching across all areas, the system locally identifies and marks specific geographic regions where positional errors are likely to occur. This allows the system to maintain high accuracy where needed while avoiding unnecessary processing costs in other areas.
Solution Approach 2:
The patent implements preliminary action by pre-storing error occurrence areas and map information in the map information storage unit before actual navigation operations. The system proactively identifies and records areas with potential positional errors in advance, so that during runtime, it can quickly reference these pre-prepared data structures to determine appropriate notification strategies without performing expensive real-time high-precision matching.
2Productivity
If drive support information is notified based on map matching results, then the system can provide travel assistance, but erroneous notification may occur due to map matching errors
Solution Approach 1:
The patent applies feedback by using the stored error occurrence area information to adjust and validate the drive support information notification process. The system continuously references the pre-stored error areas to determine whether current positional data falls within known problematic zones, and accordingly adjusts or suppresses notifications to avoid erroneous alerts. This feedback mechanism ensures that notifications are reliable and accurate.
3Reliability
If the system limits drive support information offer when positional error exceeds predetermined level, then the reliability of information is improved, but the completeness of information delivery is reduced
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the notification parameters (whether to provide drive support information) based on the positional error level and the pre-stored error occurrence area data. When the vehicle is in a known error area, the system changes the notification parameter to suppress or modify alerts, preventing unreliable information from being delivered. This selective parameter adjustment maintains reliability while minimizing information loss.
Data Source
AI summary
A drive support system can provide drive support information on traveling of an own vehicle with respect to another vehicle based on positional information. The drive support system can include a drive support level determination part which changes the degree of offer of the drive support information in a stepwise manner corresponding to a traveling area of the own vehicle. An error occurrence area memory part stores an area where an error in the positional information meets or exceeds a predetermined level in advance along with map information. A degree of offer of the drive support information is limited when the own vehicle is present within an area where an error in the positional information meets or exceeds a predetermined level.