NR Multi-Frequency Positioning for Carrier Phase Ambiguity Solving
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Solution Overview
Problem
The traditional GNSS carrier phase positioning technology is not compatible with NR due to the use of orthogonal frequency division multiplexing (OFDM) multi-carrier signals, which prevents accurate integer ambiguity solving and terminal positioning in 5G new radio (NR) systems.
Innovation Solution
A method for multi-frequency positioning that involves a target terminal and/or positioning reference unit (PRU) transmitting capability information to a first positioning node, receiving frequency configuration information, and performing multi-frequency positioning based on multiple frequencies to support NR carrier phase positioning, including measuring and reporting measurement quantities and quality information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional GNSS carrier phase positioning technology is used, then integer ambiguity solving accuracy is improved, but compatibility with NR OFDM multi-carrier signals is lost
Solution Approach 1:
The patent changes the frequency parameter from single-frequency GNSS signals to multi-frequency NR signals. By configuring multiple frequencies (e.g., first frequency and second frequency) in the positioning reference signal, the system adapts traditional carrier phase positioning to NR OFDM signals, resolving the compatibility issue while maintaining measurement precision through multi-frequency carrier phase measurements
Solution Approach 2:
The patent makes the positioning reference signal universal by enabling it to carry positioning information across multiple frequencies. The downlink positioning reference signal can be transmitted at multiple frequencies simultaneously, allowing a single signal structure to serve both compatibility with NR and maintenance of carrier phase positioning accuracy
2Measurement precision
If multi-frequency positioning is implemented, then terminal positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the positioning task by separating frequency configuration from the positioning measurement process. The network device configures which frequencies to use, and the terminal performs carrier phase measurements at those configured frequencies. This segmentation reduces terminal complexity by eliminating the need for the terminal to determine optimal frequencies, while still achieving high positioning accuracy through multi-frequency measurements
Data Source
AI summary
Embodiments of the present invention provide a multi-frequency positioning method, device and apparatus, and a storage medium. The method comprises: a target terminal and/or a positioning reference unit (PRU) sending terminal capability information to a first positioning node, wherein the terminal capability information is used for indicating multi-frequency processing capability of the target terminal and/or the PRU; and receiving frequency configuration information sent by the first positioning node, and executing multi-frequency positioning according to a plurality of frequencies indicated by the frequency configuration information.