PRS Beam Group Reporting for Lower NR Positioning Overhead
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Solution Overview
Problem
In the new radio (NR) system, the complexity and overheads of reporting multi-beam measurement results for positioning reference signals (PRS) have not been clearly defined, leading to inefficiencies in the reporting process.
Innovation Solution
A method for reporting positioning measurement information that involves receiving configuration information to determine a beam group based on reference signal received power (RSRP) or time of arrival (TOA) for a cell, allowing the selection of N beams for reporting, where N is a positive integer, to reduce overheads by properly selecting beam measurement results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE measures and reports PRS from multiple beams in NR system, then positioning accuracy is improved, but reporting overhead and complexity increase significantly
Solution Approach 1:
The patent segments the beam measurement reporting process by introducing a beam grouping mechanism. Instead of reporting all beam measurements individually, the UE groups beams into beam groups and reports measurements at the group level. This segmentation reduces the number of reporting instances while preserving positioning accuracy through selective beam group reporting.
Solution Approach 2:
The patent extracts only the essential beam group measurement results for reporting, rather than reporting all individual beam measurements. By selecting representative beam groups and reporting their aggregate measurements (such as RSRP or TOA), the system reduces reporting overhead while maintaining sufficient positioning information.
2Loss of information
If the UE reports measurement results of all beams, then complete positioning information is obtained, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by reporting only necessary beam group measurements instead of all beam measurements. The UE selectively reports measurements based on configuration parameters, reporting thresholds, or network requirements, thereby providing sufficient positioning information with reduced signaling overhead.
Solution Approach 2:
By segmenting beams into groups and reporting at the group level, the patent reduces the quantity of reported information while maintaining positioning completeness. The beam grouping allows the system to report aggregated measurements that represent multiple beams, reducing overall signaling overhead.
3Productivity
If beam grouping is implemented for PRS measurement, then reporting efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent implements universal beam grouping configuration that can be applied across different cells and beam scenarios. The beam grouping mechanism serves multiple functions: it organizes beams for measurement, enables efficient reporting, and adapts to different positioning requirements through configurable parameters, thereby improving reporting efficiency without proportionally increasing configuration complexity.
Data Source
AI summary
A method for reporting positioning measurement information, a terminal, and a network device are provided. The method includes: receiving first configuration information from a network device; and reporting a measurement result of a beam group based on the first configuration information, where the beam group is used to transmit a positioning reference signal PRS, and the beam group includes N beams determined by reference signal received power RSRP or time of arrival TOA, where N is a positive integer, the N beams are beams in a first cell, and the first cell is one of cells participating in positioning.