Precoding Feedback Coefficient Limits for Lower Wireless Overhead

Solution Overview

Problem

The direct transmission of control parameters for precoding in wireless communication results in unreasonable combinations, leading to increased resource overhead and reduced accuracy of precoding feedback.

Innovation Solution

Adjusting the upper limit value of the feedback number of coefficients in precoding by configuring parameters such as the number of space and frequency domain vectors, and coefficients, ensuring accurate reporting while reducing resource overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If control parameters for precoding are directly transmitted from transmitting side to receiving side, then precoding control can be performed, but unreasonable control parameter combinations occur leading to increased resource overhead and reduced precoding report accuracy

Engineering Contradiction:

Improveprecoding controlVSAvoidprecoding report accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent implements dynamic adjustment of the upper limit value for the number of coefficients based on the actual channel conditions and precoding requirements. The receiving side determines the upper limit value according to received configuration parameters and adjusts it adaptively, allowing the system to optimize between feedback accuracy and resource overhead dynamically rather than using fixed parameters

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of upper limit value for the number of coefficients in precoding feedback. By adjusting this parameter based on configuration parameters received from the transmitting side, the system optimizes the balance between feedback accuracy and resource overhead, preventing unreasonable parameter combinations while maintaining precoding control effectiveness

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If control parameters for precoding are directly transmitted from transmitting side to receiving side, then precoding control can be performed, but resource overhead of precoding feedback is increased

Engineering Contradiction:

Improveprecoding controlVSAvoidresource overhead

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The patent applies partial action by transmitting only the essential configuration parameters (such as upper limit value indicators) from the transmitting side, while the receiving side performs local determination and adjustment of the actual upper limit value for coefficients. This partial transmission approach reduces resource overhead compared to directly transmitting all control parameters, while still enabling effective precoding control through the combination of transmitted indicators and locally determined values

Inventive Principle:

Principle #16Partial or excessive action

3Measurement precision

If the number of coefficients in precoding feedback is increased to improve accuracy, then precoding report accuracy improves, but resource overhead increases

Engineering Contradiction:

Improveprecoding report accuracyVSAvoidresource overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent implements dynamic adjustment of the upper limit value for the number of coefficients based on the actual channel conditions and precoding requirements. The receiving side determines the upper limit value according to received configuration parameters and adjusts it adaptively, allowing the system to optimize between feedback accuracy and resource overhead dynamically rather than using fixed parameters

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of upper limit value for the number of coefficients in precoding feedback. By adjusting this parameter based on configuration parameters received from the transmitting side, the system optimizes the balance between feedback accuracy and resource overhead, preventing unreasonable parameter combinations while maintaining precoding control effectiveness

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3952123B1Method and apparatus for controlling precoding, and terminal device and base station

Publication Date: 2025.11.19 ZTE CORP

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AI summary

Provided are a method, an apparatus, a terminal device and a base station for controlling precoding. The method includes: receiving configuration parameters configured by a base station for the precoding, where the precoding is used for feeding back a channel state; determining an upper limit value of a feedback number of coefficients of composition vectors of the precoding according to the configuration parameters; and adjusting the upper limit value of the feedback number.