NTN Joint Channel Estimation With Network-Led Uplink Overhead Reduction

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Solution Overview

Problem

The overhead on the uplink channel is significant when configuring joint channel estimation centered on the terminal device, which is a challenge in existing communication systems.

Innovation Solution

The configuration information for joint channel estimation is determined by the network device, reducing the need for frequent reporting from the terminal device and thus minimizing uplink channel overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If joint channel estimation is configured centered on the terminal device, then channel estimation accuracy is improved, but uplink channel overhead increases significantly

Engineering Contradiction:

Improvechannel estimation accuracyVSAvoiduplink channel overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent inverts the traditional terminal-centric configuration approach by implementing network device-centric configuration for joint channel estimation. The network device determines the configuration information (including time domain window length and frequency domain window size) and sends it to the terminal device, reversing who performs the configuration decision-making. This inversion reduces uplink overhead while maintaining estimation accuracy.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The network device acts as an intermediary that centralizes the configuration decision-making process. Instead of the terminal device independently determining configuration parameters (which generates significant uplink reporting overhead), the network device receives channel quality feedback and sends back optimized configuration information, mediating between channel conditions and terminal device operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If terminal device determines joint channel estimation configuration, then adaptability to terminal conditions is improved, but uplink signaling overhead increases

Engineering Contradiction:

Improveconfiguration adaptabilityVSAvoiduplink signaling overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The system implements a feedback mechanism where the terminal device sends channel quality information to the network device, and the network device uses this feedback to determine appropriate configuration parameters. This feedback loop maintains adaptability to terminal conditions while avoiding the need for the terminal to autonomously determine and report configuration parameters, thus controlling uplink signaling overhead.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network device dynamically adjusts configuration parameters (time domain window length, frequency domain window size) based on received channel quality feedback. These parameter changes allow the system to adapt to varying terminal conditions and channel states while the network device retains control over the configuration decisions, preventing excessive uplink overhead.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20260032656A1Method for wireless communication, terminal device, and network device

Publication Date: 2026.01.29 QUECTEL WIRELESS SOLUTIONS CO LTD

AI summary

The present disclosure provides a method for wireless communication, a network device, and a terminal device. One example method includes: receiving, by a terminal device, first information from a network device in a non-terrestrial network (NTN), wherein the first information indicates a length of a first time period, and the length of the first time period is associated with joint channel estimation.