Radio Positioning Performance Mapping Through Local Device Density
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Solution Overview
Problem
Satellite-based positioning systems fail to provide seamless and accurate navigation indoors due to insufficient signal penetration through walls and roofs, necessitating the development of non-GNSS based radio positioning systems for indoor use.
Innovation Solution
A method and apparatus for evaluating the radio positioning performance of a radio positioning system by analyzing radio positioning support device densities and coverage areas using a radio positioning support map, which includes determining observed and expected densities and performance levels in subareas, and adjusting data collection based on these evaluations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite-based positioning systems are used for indoor positioning, then outdoor navigation performance is maintained, but signal penetration through walls and roofs is insufficient for adequate indoor signal reception
Solution Approach 1:
The patent introduces radio positioning support devices (pseudolites, BLE beacons, WLAN access points, cellular base stations) as intermediary elements that relay positioning information indoors. These devices receive satellite signals outdoors and retransmit processed positioning data indoors, acting as mediators that bridge the gap between satellite-based outdoor positioning and indoor positioning requirements where direct satellite signal penetration is insufficient
2Quantity of substance
If crowd-sourcing is used for continuous background data collection, then training data coverage is improved, but resource consumption and user burden increase
Solution Approach 1:
The patent implements adaptive crowd-sourcing that performs partial data collection actions only when necessary. The system evaluates positioning performance in different areas and triggers data collection only in regions where performance is insufficient, rather than continuously collecting data everywhere. This partial action approach maintains adequate training data coverage while significantly reducing resource consumption compared to exhaustive continuous collection
Solution Approach 2:
The patent establishes a feedback loop where positioning performance is continuously evaluated based on observed vs. expected radio positioning support device densities. This feedback mechanism informs whether additional crowd-sourced data collection is needed in specific areas, allowing the system to adaptively adjust data collection efforts based on actual performance requirements rather than following a fixed continuous collection schedule
3Measurement precision
If radio positioning support devices are densely deployed to improve indoor positioning accuracy, then positioning precision is enhanced, but system complexity and deployment cost increase
Solution Approach 1:
The patent segments the service area into multiple subareas and evaluates positioning performance independently in each subarea based on expected radio positioning support device densities. This segmentation allows the system to identify specific regions where additional devices are needed rather than uniformly increasing device density across the entire area, thereby reducing overall system complexity while maintaining positioning accuracy in critical regions
Solution Approach 2:
The patent applies local quality by determining expected radio positioning support device densities specific to each subarea based on its characteristics and positioning performance requirements. Different subareas may have different expected density thresholds, allowing the system to optimize device deployment locally rather than applying a uniform density standard everywhere, thus achieving necessary positioning accuracy without unnecessary system complexity
Data Source
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AI summary
It is inter-alia disclosed a method, wherein the method comprises: - obtaining or holding available radio positioning support map information representing a radio positioning support map of a radio positioning system and geographic map information representing a geographic map, wherein an overlapping geographic area is covered by the radio positioning support map and the geographic map, wherein the overlapping geographic area is dividable into a plurality of subareas of the overlapping geographic area; - determining, for each subarea of the plurality of subareas, a respective observed radio positioning support device density at least partially based on the radio positioning support map; - determining, for each subarea of the plurality of subareas, a respective expected radio positioning support device density at least partially based on the geographic map; - evaluating, for each subarea of the plurality of subareas, a respective radio positioning performance of the radio positioning system in the respective subarea of the plurality of subareas at least partially based on the respective observed radio positioning support device density and the respective expected radio positioning support device density.