Downlink Carrier Phase Reporting for High-Accuracy Positioning

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing downlink positioning methods, such as delay-based DL-TDOA and angle-based DL-AoD, suffer from low system positioning accuracy.

Innovation Solution

An information reporting method that utilizes carrier phase positioning reference signals (C-PRS), downlink positioning reference signals (DL-PRS), channel state indication-reference signals (CSI-RS), and synchronization signal blocks (SSB) to measure and report phase measurement quantities like intra-cycle and whole-cycle phase values, integer ambiguities, and relative phase differences, enhancing positioning accuracy by calculating DL-POA or DL-RSPD.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If delay-based DL-TDOA or angle-based DL-AoD positioning methods are used, then positioning can be implemented, but system positioning accuracy is low

Engineering Contradiction:

Improvepositioning accuracyVSAvoidsystem positioning accuracy

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent changes the measurement parameter from delay time (DL-TDOA) or angle (DL-AoD) to carrier phase difference. By measuring the phase difference of downlink positioning reference signals at the terminal and reporting it to the network device, the system achieves higher positioning accuracy because phase measurements provide finer resolution compared to delay or angle measurements alone.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If phase measurement quantities are reported to improve positioning accuracy, then positioning precision increases, but measurement and reporting complexity increases

Engineering Contradiction:

Improvephase measurement accuracyVSAvoidmeasurement and reporting complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent segments the phase measurement process into distinct components: the terminal measures the phase difference of downlink positioning reference signals, processes this measurement into a phase measurement quantity, and reports it to the network device. This segmentation allows each component to be optimized independently, managing complexity while maintaining high precision.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces phase measurement quantities as an intermediary between the raw phase difference measurement and the final positioning calculation. The terminal measures the phase difference, converts it to a standardized phase measurement quantity, and reports this intermediate result to the network device, which then uses it for positioning. This intermediary structure simplifies the overall system by providing a standardized measurement format.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12507102B2Information reporting method, apparatus and device, and readable storage medium

Publication Date: 2025.12.23 DATANG MOBILE COMM EQUIP CO LTD

AI summary

The present disclosure provides an information reporting method, an apparatus, a device and a readable storage medium. The method includes: acquiring a first reference signal; performing measurement according to the first reference signal to obtain a first phase measurement quantity; reporting the first phase measurement quantity; wherein, the first reference signal comprises at least one of the following reference signals: a C-PRS, a DL-PRS, a CSI-RS and a SSB; the first phase measurement quantity includes at least one of the following: an intra-cycle phase value, an integer ambiguity, and a whole-cycle phase value.