Multi-Carrier Phase Difference Reporting for NR Positioning
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Solution Overview
Problem
There is no specific solution for carrier phase measurement reporting in New Radio (NR) systems, which hinders accurate positioning using carrier phase measurements.
Innovation Solution
An information transmission method and apparatus are provided, enabling terminals and base stations in NR systems to perform carrier phase measurements and transmit related information to a Location Management Function (LMF) entity, facilitating accurate carrier phase positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS carrier phase measurement scheme is used, then positioning accuracy is improved, but the scheme is not applicable to NR multi-carrier OFDM signals
Solution Approach 1:
The patent changes the measurement parameters from single-carrier phase values to multi-carrier phase difference values. By measuring phase differences between multiple carriers in the OFDM signal and converting them to equivalent delay measurements, the system achieves both high positioning accuracy and compatibility with NR multi-carrier signals. The transformation involves calculating phase differences across different subcarriers and mapping these to time delay estimates.
2Adaptability or versatility
If carrier phase measurement is performed on multi-carrier OFDM signal, then adaptability to NR system is improved, but measurement precision deteriorates due to lack of specific reporting scheme
Solution Approach 1:
The patent segments the multi-carrier OFDM signal into individual carrier phase measurements. By measuring the phase of each subcarrier separately and then computing phase differences between them, the system maintains the ability to exploit the high precision of carrier phase measurements while adapting to the multi-carrier structure of NR signals. This segmentation approach allows precise measurement of each carrier's phase contribution.
Solution Approach 2:
The patent introduces phase difference as an intermediary parameter between raw carrier phase measurements and final positioning results. Instead of directly using individual carrier phases or simple averages, the system computes phase differences between carriers as an intermediate step, which then serves as the basis for delay estimation. This intermediary transformation preserves measurement precision while enabling multi-carrier adaptability.
3Device complexity
If no specific carrier phase measurement reporting scheme is provided, then system complexity is reduced, but positioning accuracy deteriorates
Solution Approach 1:
The patent creates a universal measurement reporting scheme that serves multiple functions: it is compatible with NR multi-carrier OFDM signals, maintains high positioning accuracy through phase difference measurements, and can be integrated into existing positioning frameworks. The proposed scheme measures phase differences across carriers and reports these in a standardized format that works for both single and multi-carrier scenarios, eliminating the need for separate specialized reporting mechanisms.
Data Source
AI summary
This application provides an information transmission method and apparatus, and a carrier phase positioning method and apparatus, and related to the field of communications technology. The information transmission method includes: performing, by a terminal, carrier phase measurement according to a first signal, and transmitting carrier phase measurement related information of N first carriers to a location management function LMF entity, where N is a positive integer.