Transformed Map Data Positioning Without Coordinate Transformation
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Solution Overview
Problem
Current positioning systems, such as those in 5G NR, face challenges in utilizing map data from different coordinate systems without knowledge of the transformation, which can lead to positioning inaccuracies and compliance issues due to unknown or restricted coordinate system transformations.
Innovation Solution
A method that allows positioning devices to request and utilize map data from a second coordinate system, calculating relative distances between coordinates and objects, enabling accurate positioning and navigation without needing to know the transformation details, thus complying with regulatory restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning systems use map data from different coordinate systems without transformation knowledge, then positioning accuracy deteriorates, but if transformation is applied, compliance issues arise due to restricted coordinate system transformations
Solution Approach 1:
The patent introduces an intermediary coordinate system that acts as a bridge between the device's native coordinate system and the map data's coordinate system. The positioning device determines its position in the intermediary system using sensor data and map matching, then transforms to the target coordinate system only when needed for final position output. This mediator approach enables the device to work with map data from different coordinate systems without requiring direct transformation knowledge, thus maintaining both positioning accuracy and regulatory compliance.
2Measurement precision
If positioning devices request map data in their native coordinate system, then positioning accuracy improves, but availability of map data deteriorates due to coordinate system restrictions
Solution Approach 1:
The patent segments the coordinate system transformation process into multiple independent steps: (1) determining position in an intermediary coordinate system using sensor measurements and map matching, (2) transforming to the target coordinate system only for final position output. This segmentation allows the device to request and process map data in various coordinate systems while maintaining positioning accuracy in the native coordinate system, thus resolving the contradiction between accuracy and data availability.
3Adaptability or versatility
If positioning systems implement full coordinate system transformation, then compatibility with map data improves, but system complexity increases due to transformation knowledge requirements
Solution Approach 1:
The patent introduces an intermediary coordinate system that acts as a universal reference frame, eliminating the need for the positioning device to implement multiple coordinate system transformations. The device only needs to: (1) determine position in the intermediary system using sensor data and map matching, (2) perform a single transformation to the target coordinate system when needed. This intermediary approach significantly reduces system complexity while maintaining broad map data compatibility.
Data Source
AI summary
Aspects presented herein may improve the performance of positioning devices by enabling the positioning devices to utilize transformed map data with limited third party knowledge of the transformation. Aspects presented herein may enable a positioning device to make the map data from another coordinate system usable for positioning algorithms without knowledge of the transformation. In one aspect, a UE transmits a request for map data based on a first set of coordinates in a first coordinate system. The UE receives the map data based on a second set of coordinates in a second coordinate system, where the first set of coordinates in the first coordinate system is distinct from the second set of coordinates in the second coordinate system. The UE calculates a set of relative distances between the second set of coordinates and one or more objects corresponding to the map data.