Prioritizing PRS Measurements by Multipath Characteristics
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately determining the position of user equipment (UE) due to the presence of multipath components in positioning reference signal (PRS) resources, which can degrade the accuracy of position measurement reports.
Innovation Solution
A method where a network node, such as a UE or base station, prioritizes PRS resource measurements based on multipath characteristics, including the number of multipath components, strength metric, and time domain span, to select and order measurements in a location information report, as requested by a location server, to improve position determination accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If all available PRS resource measurements are included in the location information report, then the quantity of positioning data is increased, but the accuracy of position determination is degraded due to multipath components
Solution Approach 1:
The patent extracts and removes PRS resource measurements that contain multipath components from the location information report. The network node identifies measurements contaminated by multipath effects and excludes them, keeping only the clean measurements that provide accurate positioning data. This selective extraction resolves the contradiction by reducing quantity while maintaining or improving accuracy.
Solution Approach 2:
The patent applies different quality assessment to different PRS resource measurements based on their individual multipath characteristics. Each measurement is evaluated locally for the presence and strength of multipath components, and only measurements with acceptable quality (low multipath content) are included in the report. This local quality control allows the system to optimize accuracy by treating each measurement individually rather than uniformly.
2Quantity of substance
If PRS resource measurements with multipath components are included in the location information report, then the quantity of positioning data is increased, but the reliability of position measurement is degraded
Solution Approach 1:
The patent converts the harmful effect of multipath components into a useful filtering mechanism. By detecting and measuring multipath characteristics in each PRS resource measurement, the system identifies which measurements are reliable and which are not. The presence of multipath components, rather than being merely harmful, becomes a diagnostic tool for quality assessment, allowing the system to selectively include only reliable measurements in the location information report.
3Measurement precision
If the network node processes and prioritizes PRS resource measurements based on multipath characteristics, then the accuracy of position determination is improved, but the device complexity is increased
Solution Approach 1:
The patent performs preliminary assessment of multipath characteristics for each PRS resource measurement before including it in the location information report. The network node evaluates multipath content in advance and makes prioritization decisions beforehand, rather than processing all measurements equally and then filtering them later. This preliminary action simplifies the overall processing by pre-identifying which measurements are worth including, reducing the complexity of subsequent position determination operations.
Data Source
AI summary
A network node supports position measurement determination for a user equipment (UE) by prioritizing positioning reference signal (PRS) resource measurements to be included in a location information report based on multipath characteristics of the PRS resources. The network node, for example, may be the UE, a base station, or a sidelink UE. The PRS resource measurements may be prioritized by determining a subset of available PRS resource measurements to include in and/or the order of inclusion in the location information report. The multipath characteristics of each PRS resource may be the number, a strength metric, or a time domain span of the multipath components, or any combination thereof. A location server may request the prioritization of the PRS resource measurements based on the multipath characteristics of the PRS resources and may use the order of the PRS resource measurements in the position determination for the UE.