Carrier Phase Error Signaling in UE Position Estimation

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Solution Overview

Problem

Existing wireless communication systems face challenges in accurately estimating the position of user equipment due to carrier phase measurement errors, which affect the precision and latency of positioning processes.

Innovation Solution

Implementing a method that includes performing carrier phase measurements for positioning, determining error information associated with these measurements, and transmitting this information to a position estimation entity to enhance the accuracy of position estimation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If carrier phase measurements are performed for position estimation, then position estimation capability is enabled, but measurement errors reduce position estimation accuracy

Engineering Contradiction:

Improveposition estimation accuracyVSAvoidcarrier phase measurement error

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent implements feedback by measuring carrier phase errors and using these measurements to compensate for positioning errors. The wireless device measures the carrier phase of downlink signals, determines measurement errors, and applies corrections based on these error measurements to improve position estimation accuracy.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces traditional mechanical/metric positioning methods with signal-based carrier phase measurement. Instead of relying on geometric positioning methods, the system uses electromagnetic signal phase information to determine position, leveraging the higher precision of phase measurements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If traditional positioning methods are used, then system complexity is lower, but positioning accuracy is insufficient

Engineering Contradiction:

Improvepositioning accuracyVSAvoidpositioning system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent makes the wireless device perform multiple functions: it acts as both a communication device and a positioning measurement device. The same wireless infrastructure used for communication also provides positioning reference signals, eliminating the need for separate positioning infrastructure and reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The wireless device autonomously performs carrier phase measurements and error determination for its own positioning. The device self-measures the carrier phase of received signals, calculates measurement errors, and applies corrections without requiring complex external positioning infrastructure or additional network entities.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12513657B2Carrier phase measurement error information associated with position estimation of a user equipment

Publication Date: 2025.12.30 QUALCOMM INC

AI summary

Aspects are directed to a wireless measurement entity that performs a carrier phase measurement associated with a reference signal for positioning (RS-P) measurement for a position estimation of a user equipment (UE). The wireless measurement entity determines error information associated with the carrier phase measurement. The wireless measurement entity transmits the RS-P measurement to a position estimation entity, and further transmits the carrier phase measurement and an indication of the error information to the position estimation entity. The position estimation entity determines a position estimate of the UE based on the RS-P measurement, the carrier phase measurement, and the indication of the error information.