5G Channel State Reporting via Grouped Reference Signals

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Solution Overview

Problem

In 5G communication systems, the mutual interference between reference signals in group-based reporting is severe, affecting the simultaneous operation of multiple beams and antenna panels.

Innovation Solution

A method and apparatus for channel state information feedback that involves receiving a report configuration, determining channel state information based on a grouping criterion, and feeding back the information through a report instance to avoid mutual interference between reference signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple reference signals are received simultaneously in group-based reporting, then the capability of multiple beams operating simultaneously under multiple antenna panels and transmission receive points is achieved, but the mutual interference between reference signals becomes severe

Engineering Contradiction:

Improvecapability of multiple beams operating simultaneouslyVSAvoidmutual interference between reference signals

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the reference signals into different groups based on their QCL relationships and grouping criteria. By dividing the reference signals into multiple groups that can be separately processed and reported, the system maintains the capability of multiple simultaneous beams while reducing interference within each group. The segmentation allows independent handling of reference signal groups, enabling simultaneous operation without severe mutual interference.

Inventive Principle:

Principle #1Segmentation

2Productivity

If reference signals are grouped for reporting, then beam reporting efficiency is improved, but interference between reference signals in the same group increases

Engineering Contradiction:

Improvebeam reporting efficiencyVSAvoidinterference between reference signals

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by establishing specific grouping criteria that ensure reference signals within the same group have compatible characteristics (QCL relationships). This local optimization within groups allows efficient reporting while maintaining signal quality. The grouping criterion ensures that reference signals grouped together have similar channel characteristics, reducing interference while preserving reporting efficiency.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If multiple antenna panels and transmission receive points operate simultaneously, then system capacity and flexibility are enhanced, but signal interference and complexity increase

Engineering Contradiction:

Improvesimultaneous operation of multiple antenna panels and TRPsVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the multiple antenna panels and transmission receive points into distinct groups based on reference signal grouping. Each group can be independently configured and managed, reducing the overall system complexity while maintaining the capability of simultaneous operation. The segmentation allows for modular handling of multiple panels and TRPs, making the system more manageable.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent inverts the traditional approach by having the terminal device perform the grouping of reference signals based on predefined criteria rather than having the network device manage all grouping decisions. This inversion reduces network side complexity while enabling flexible simultaneous operation of multiple antenna panels and TRPs through terminal-side intelligence.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentEP4203546B1Reporting channel state information to a second node through a report instance

Publication Date: 2025.09.03 ZTE CORP

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AI summary

Provided are an information feedback method and apparatus, an information receiving method and apparatus, a device, and a storage medium. The information feedback includes the following: a second node configures a report configuration and sends the report configuration to a first node; the first node receives the report configuration sent by the second node and determines channel state information according to the report configuration, where the channel state information includes a reference signal, and the reference signal satisfies a grouping criterion associated with the report configuration; the channel state information is fed back to the second node through a report instance; and the second node receives the channel state information fed back by the first node through the report instance.