Dynamic Location Reference Decoding Fallback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dynamic location referencing methods, such as AGORA-C, OpenLR, and TPEG-ULR, often fail to accurately decode point locations along a line, leading to incomplete or missing location information, especially for speed cameras and other speed enforcement devices, due to differences in digital map versions and formats.
Innovation Solution
A method that, upon decoding failure, uses the geographic coordinates of the start and end location reference points to determine a straight line and calculates an approximate location along this line based on an offset value, allowing for projection onto a segment in a second digital map, ensuring an approximate position is always determined, even if the regular decoding process fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If dynamic location referencing methods (AGORA-C, OpenLR, TPEG-ULR) are used to encode point locations, then location information can be transmitted efficiently with reduced bandwidth, but the decoding process fails to accurately resolve locations due to differences in digital map versions and formats
Solution Approach 1:
The patent introduces an intermediary approximation process that mediates between the encoded location data and the target digital map. When exact decoding fails, the system uses start and end coordinates to create a straight-line approximation, serving as a bridge that ensures location information can always be recovered even when perfect accuracy is not achieved through standard decoding methods.
Solution Approach 2:
The patent prepares for potential decoding failures in advance by implementing a fallback approximation mechanism. Before complete failure occurs, the system has a pre-planned contingency: using geometric approximation based on boundary coordinates to ensure location data can always be resolved, thus cushioning against the harmful effect of decoding failures.
2Measurement precision
If standard decoding processes are used to resolve point locations in a second digital map, then exact location accuracy can be achieved when maps match, but the process fails completely when digital map versions or formats differ
Solution Approach 1:
The patent implements a dynamic resolution process that adapts based on decoding success. The system first attempts exact decoding for maximum precision, but automatically transitions to approximation mode when decoding fails due to map version differences. This dynamic approach allows the system to maintain operation across different map versions while preserving exact accuracy when possible.
Solution Approach 2:
The patent changes the resolution parameters from exact coordinate matching to geometric approximation when map compatibility issues arise. By switching from strict decoding requirements to a more flexible approximation method using start and end coordinates, the system maintains adaptability across different digital map versions and formats.
3Measurement precision
If exact decoding is attempted for all location references, then complete location accuracy is achieved, but the system cannot handle cases where digital map versions differ between encoding and decoding stages
Solution Approach 1:
The patent performs a preliminary decoding attempt before resorting to approximation. This preliminary action checks whether exact decoding is possible, and only if it fails does the system proceed to the approximation method. This ensures that exact accuracy is maintained when possible, while providing a reliable fallback when map version differences prevent successful decoding.
Solution Approach 2:
The patent implements a feedback mechanism where the result of the decoding process determines the next action. If decoding succeeds, the exact location is used; if it fails, the system feedbacks to the approximation method using boundary coordinates. This feedback loop ensures both high accuracy when possible and high reliability when map versions differ.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Embodiments of the present invention provide a method of resolving a point location from a location reference, the location reference comprising a plurality of location reference points, each location reference point being representative of a node in a first digital map and having attributes associated therewith from the first digital map, including geographic coordinates of the node, so as to define a path between a start location reference point and an end location reference point, the location reference further comprising an offset value representative of a distance along the path. The method comprises obtaining (410) the geographic coordinates of the start location reference point (210) and the end location reference point (220), determining geographic coordinates of a location (250) along a line (230) extending between the geographic coordinates of the start location reference point (210) and the end location reference point (220) corresponding to the offset value (240), and using the determined geographic coordinates (250) as an approximate location of the point location in a second digital map.