Joint Channel Estimation Signaling for TDW Power and Phase Continuity

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Solution Overview

Problem

Existing communication technologies face challenges in maintaining power consistency and phase continuity during joint channel estimation, particularly in joint channel estimation for Physical Uplink Shared Channel (PUSCH) due to lack of clear indication methods for Time Domain Window (TDW) requirements.

Innovation Solution

An indication method is provided to indicate configuration parameters for joint channel estimation, including explicit and implicit signaling methods to ensure power consistency and phase continuity, such as using DCI, RAR, and predefined rules to determine TDW length.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If joint channel estimation is performed across slots with MSG3 repetition, then coverage is enhanced, but the terminal cannot maintain power consistency or phase continuity

Engineering Contradiction:

ImprovecoverageVSAvoidpower consistency and phase continuity

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The network side device sends indication information in advance (before joint channel estimation) to configure the TDW parameters and notify the terminal of the upcoming joint channel estimation operation. This allows the terminal to prepare and maintain power consistency and phase continuity throughout the TDW, ensuring reliable cross-slot joint channel estimation for coverage enhancement.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If TDW length is extended to support cross-slot joint channel estimation, then coverage is improved, but terminal power and phase stability becomes difficult to maintain

Engineering Contradiction:

ImprovecoverageVSAvoidTDW length

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The TDW length is made dynamic and configurable rather than fixed. The network side device can adjust the TDW length according to actual channel conditions and terminal capabilities, balancing the need for coverage enhancement with the terminal's ability to maintain power and phase stability throughout the estimation window.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If joint channel estimation is enabled without explicit indication, then system complexity is reduced, but channel estimation accuracy deteriorates

Engineering Contradiction:

Improvesystem complexityVSAvoidchannel estimation accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

Indication information acts as an intermediary between the network side device and terminal. This indication explicitly notifies the terminal of joint channel estimation operations and TDW configurations, ensuring the terminal can accurately maintain power and phase consistency. The indication mechanism enables accurate channel estimation while keeping system complexity manageable through standardized signaling.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12634170B2Indication method, indication apparatus, and storage medium

Publication Date: 2026.05.19 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

An indication method is performed by a terminal, and includes: determining a first message, wherein the first message indicates a configuration parameter of joint channel estimation of a network device.