Cooperative Vehicle-Infrastructure Elevation Mapping for Multi-Layer Roads
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Solution Overview
Problem
In vehicle-infrastructure cooperation systems, the lack of direct elevation information exchange between vehicles and infrastructure facilities leads to misreporting and decision-making errors, particularly in multi-layer road networks, due to the inability to provide absolute elevation data, posing safety risks.
Innovation Solution
A cooperative vehicle-infrastructure system employs relative elevation representations to maintain consistent spatial location understanding between vehicles and infrastructure, using on-board and road-side map processors synchronized by an on-board map server to convert and update elevation data, ensuring accurate communication and decision-making.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If absolute elevation information is not provided to the outside world for security reasons, then information security is improved, but spatial location accuracy and decision-making reliability deteriorate
Solution Approach 1:
The patent introduces relative elevation information as an intermediary that conveys spatial relationship data without revealing absolute elevation values. The road side map processor converts absolute elevation data into relative elevation representations that maintain spatial accuracy while preserving security constraints. This intermediary mechanism allows vehicles to understand spatial relationships (e.g., which road is higher) without accessing sensitive absolute elevation information.
Solution Approach 2:
The patent transforms the elevation parameter from absolute values to relative values. By changing the parameter representation from absolute elevation (which contains sensitive information) to relative elevation (which preserves spatial relationships), the system maintains measurement precision for spatial decisions while improving information security. The conversion process changes how elevation data is expressed without losing the essential spatial relationship information needed for safe vehicle operation.
2Reliability
If relative elevation representations are used instead of absolute elevation information, then information security is improved, but system complexity increases due to conversion and synchronization requirements
Solution Approach 1:
The on board map server performs multiple functions: it maintains conversion relationships between different map processors, synchronizes relative elevation data, and ensures consistency across the vehicle-infrastructure system. By consolidating these coordination tasks in a central server, the system manages the complexity of relative elevation conversions without requiring complex mechanisms in each individual vehicle or road side facility.
Solution Approach 2:
The system implements feedback mechanisms where the on board map server continuously monitors and synchronizes conversion relationships between road side and on board map processors. When elevation data changes or conversion relationships need updating, the server detects these changes and propagates updates to relevant components, ensuring system consistency without requiring complex manual coordination.
3Adaptability or versatility
If road side and on board map processors use different elevation reference systems, then system adaptability is improved, but decision-making accuracy deteriorates due to inconsistent spatial understanding
Solution Approach 1:
The on board map server acts as an intermediary that bridges different elevation reference systems. It maintains conversion relationships that translate between road side map processor references and on board map processor references, ensuring that both systems can operate with their own adaptability while achieving consistent spatial understanding for accurate decision-making.
Solution Approach 2:
The system dynamically changes elevation parameters through conversion relationships that adapt to different reference systems. When a vehicle or road side facility uses a different elevation reference, the on board map server applies appropriate parameter transformations to ensure consistent spatial relationships are maintained across all participants in the vehicle-infrastructure cooperation system.
Data Source
AI summary
A cooperative vehicle-infrastructure system, including: a road side facility, an on-road vehicle, and an on board map server The system includes a road side map processor converting absolute elevation information of roads around the road side facility into road side map-based relative elevation representations according to peripheral road network information of the road side facility; an on board map processor converting absolute elevation information of roads around the vehicle into on board map-based relative elevation representations according to peripheral road network information of the vehicle; the on board map server communicating with the road side map processor and the on board map processor, updating and maintaining a conversion relationship between the road side map-based relative elevation representation and the on board map-based relative elevation representation of the same road, and synchronizing an updated conversion relationship to the on board map processor.