PRS Assistance Data Mapping for High-Accuracy Angle Estimation
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Solution Overview
Problem
Existing positioning methods for devices can only estimate a rough range of angles (angle of departure or angle of arrival) using existing assistance data, limiting the implementation of high-accuracy positioning.
Innovation Solution
The proposed method involves a communication apparatus that obtains assistance data with mapping relationships between PRS resource identifiers and power information at preset angles, allowing for accurate estimation of to-be-measured angles and enabling high-accuracy positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing assistance data with spatial direction information (azimuth, elevation, beam width) is used, then the positioning method is simple to implement, but only a rough range of angles can be estimated and high-accuracy positioning cannot be achieved
Solution Approach 1:
The patent transforms the assistance data from containing only spatial direction information (azimuth, elevation, beam width) to include mapping relationships between PRS resource identifiers and power information at multiple preset angles. This parameter change enables the terminal to perform accurate angle estimation by comparing measured power values with the stored mapping relationships, thereby resolving the contradiction between measurement precision and device complexity.
2Measurement precision
If new assistance data with detailed mapping relationships is designed, then high-accuracy positioning can be achieved, but the complexity of assistance data increases
Solution Approach 1:
The network side pre-calculates and stores the mapping relationships between PRS resource identifiers and power information at multiple preset angles in the assistance data. This preliminary action allows the terminal to directly query and compare power values without performing complex real-time calculations, thereby achieving high positioning accuracy while reducing the terminal's information processing overhead.
Data Source
AI summary
Methods of ascertaining a location of an apparatus, and associated systems are disclosed. An example method includes: receiving, by a terminal device or a chip thereof, a plurality of assistance data including one or more groups of mapping relationships corresponding to one or more preset angles, and each group of mapping relationships includes a mapping relationship between each of one or more PRS resource identifiers and power information corresponding to each PRS resource identifier at a corresponding preset angle. The terminal device determines power information corresponding to one or more PRS resource identifiers which correspond to each of a plurality of to-be-measured angles. The terminal device ascertains its location based on the plurality of assistance data and the power information corresponding to the one or more PRS resource identifiers at each of the plurality of to-be-measured angles.