NR Carrier Phase Reporting for Multi-Symbol Positioning Accuracy
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Solution Overview
Problem
There is no support for reporting a carrier phase measurement value in New Radio (NR) cellular positioning, lacking a specific definition and reasonable mechanism for multi-symbol carrier phase positioning.
Innovation Solution
A method and apparatus for obtaining carrier phase measurement values, involving a first device and an LMF entity, to instruct and report carrier phase measurements, including specific identifiers and timestamps for subcarriers, OFDM symbols, and resource blocks, enabling accurate phase measurement reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carrier phase measurement is implemented in NR system, then positioning accuracy is improved to centimeter level, but there is no support for reporting carrier phase measurement value
Solution Approach 1:
The patent segments the carrier phase measurement reporting into multiple dimensions: subcarrier level (individual subcarrier phase values), OFDM symbol level (phase values for each symbol), and resource block level (phase values for each resource block). This segmentation allows the system to report phase measurements at different granularities depending on the positioning requirements, enabling centimeter-level accuracy while providing flexible reporting support that was previously absent in NR systems.
2Measurement precision
If multiple carrier phase measurement values are reported, then positioning accuracy is enhanced, but device complexity increases
Solution Approach 1:
The patent introduces multiple dimensions for carrier phase measurement reporting: frequency dimension (different subcarriers), time dimension (different OFDM symbols), and resource dimension (different resource blocks). By organizing phase measurements across these dimensions, the system can report multiple measurement values in a structured manner that enhances positioning accuracy while managing device complexity through systematic organization of the reporting mechanism.
3Measurement precision
If carrier phase measurement value is defined and reported, then positioning accuracy is improved, but the system lacks reasonable reporting mechanism
Solution Approach 1:
The patent creates a universal reporting mechanism that can handle multiple types of carrier phase measurement values (instantaneous carrier phase ICP and accumulated carrier phase ACP) across different granularities (subcarrier, OFDM symbol, resource block). This multi-functional reporting framework enables the system to report phase measurements in a unified manner that improves positioning accuracy while providing ease of operation through a standardized, flexible reporting structure that adapts to different positioning scenarios.
Data Source
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AI summary
The present disclosure provides a method and apparatus for acquiring a carrier phase measurement value, a first device, and a location management function (LMF) entity. The method is applied to a first device and comprises: receiving first information from an LMF entity, the first information being used for instructing the first device to report a carrier phase measurement value of a target subcarrier; acquiring the carrier phase measurement value of the target subcarrier; and sending the carrier phase measurement value to the LMF entity.