User Equipment Selective PRS Reporting for Positioning Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately determining the position of user equipment (UE) due to errors in measuring positioning reference signals (PRS) from multiple base stations, particularly in multi-node systems where signal interference and noise ratios are high, leading to reduced positioning accuracy.
Innovation Solution
A method and device for reporting partial measurement results for position determination in a wireless communication system, where a user equipment (UE) receives PRS-related information, measures signals from multiple base stations, and reports only specific measurement results, such as those with the lowest reference signal time difference (RSTD) or highest received power (RSRP), to a serving base station, optimizing reporting based on distance and cluster affiliations of base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement results from all base stations are reported, then positioning accuracy is improved, but reporting overhead and processing complexity increase
Solution Approach 1:
The patent extracts and reports only the most relevant measurement results (those with lowest RSTD or highest RSRP) rather than all measurement results. This selective extraction reduces reporting overhead while maintaining positioning accuracy by focusing on the most significant measurements for position determination.
Solution Approach 2:
The patent applies different reporting strategies based on local conditions - selecting measurement results according to their specific quality metrics (RSTD or RSRP) rather than applying a uniform reporting approach. This allows the system to adaptively report only the locally optimal measurements that contribute most to positioning accuracy.
2Measurement precision
If measurement results from multiple base stations are reported, then positioning accuracy is improved, but signal interference and noise increase
Solution Approach 1:
The patent converts the potentially harmful effect of multiple measurements (which can introduce interference and noise) into a benefit by selectively using only the most reliable measurements. By choosing measurements with lowest RSTD or highest RSRP, the system transforms the challenge of multi-base station measurements into an advantage, using the selection criteria to filter out noisy measurements while retaining accurate ones.
3Loss of information
If all measurement results are reported, then complete positioning information is obtained, but reporting time and energy consumption increase
Solution Approach 1:
The patent applies partial action by reporting only a subset of measurement results that are most critical for positioning accuracy. Instead of reporting all measurements (excessive action), the system reports only those meeting specific criteria (lowest RSTD or highest RSRP), achieving sufficient positioning information with reduced reporting time and energy consumption.
Data Source
AI summary
A method for reporting a measurement report for determining a position in a wireless communication system, according to one embodiment of the present invention, is performed by a terminal and may comprise the steps of: receiving positioning reference signal (PRS)-related information comprising a position identifier of each of a plurality of base stations; performing a measurement on the PRSs transmitted by each of the plurality of base stations; if the position identifiers of each of the plurality of base stations are identical to each other, selecting at least one measurement result among the measurement results for the PRSs; and reporting the selected measurement result to a serving base station.