Large-Scale Parameter Measurement with QCL Time Windows

Solution Overview

Problem

In dense and distributed wireless networks, the changing interference situation due to UE movement or AP/UE cooperation requires accurate measurement of large-scale property parameters for correct demodulation of reference signals, which existing methods fail to address, especially with varying sensitivity to time changes.

Innovation Solution

A method and apparatus for measuring large-scale property parameters using QCL association information within a defined time window, configured by indication information, to ensure accurate parameter measurement for reference signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the large-scale property parameter of the first reference signal is measured accurately, then the demodulation of the second reference signal can be ensured, but the measurement time window must be precisely controlled to account for time sensitivity

Engineering Contradiction:

Improvelarge-scale property parameter measurement accuracyVSAvoidtime window control complexity

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by measuring the large-scale property parameter of the first reference signal in advance within a predetermined time window before the second reference signal is received. This advance measurement ensures that the parameter is captured while still valid for QCL relationship establishment, preventing time-related inaccuracies from compromising measurement precision.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by establishing a predetermined time window that dynamically adapts to the temporal relationship between the first and second reference signals. The time window is configured to end before the second reference signal is received, allowing the system to accommodate time-sensitive parameter variations while maintaining measurement accuracy through flexible temporal constraints.

Inventive Principle:

Principle #15Dynamics

2Productivity

If multiple APs serve multiple UEs simultaneously in dense networks, then network capacity is improved, but the interference situation changes frequently requiring continuous parameter adjustment

Engineering Contradiction:

Improvenetwork capacityVSAvoidparameter adjustment complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by measuring the large-scale property parameter of the first reference signal in advance within a predetermined time window before the second reference signal is received. This advance measurement ensures that the parameter is captured while still valid for QCL relationship establishment, preventing time-related inaccuracies from compromising measurement precision.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by establishing a QCL relationship between the first and second reference signals, where the measured large-scale property parameter of the first signal is used to determine parameters for the second signal. This feedback mechanism allows the system to maintain accurate channel estimation despite changing interference conditions in dense networks.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250310801A1Large-scale characteristic parameter measurement method and apparatus, and node and storage medium

Publication Date: 2025.10.02 ZTE CORP

AI summary

Provided are a large-scale property parameter measurement method and apparatus, a node and a storage medium. The large-scale property parameter measurement method includes acquiring indication information which includes quasi co-location (QCL) association information and first time window information and measuring a large-scale property parameter of a first reference signal according to the indication information.