Channel Correlation Reporting for MU-MIMO Channel Prediction

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Solution Overview

Problem

Wireless communications systems face challenges in improving channel prediction due to complex and dynamic environments, which attenuate or block signals, affecting speed, data capacity, efficiency, power consumption, reliability, and device connectivity, particularly in multiple-user MIMO scenarios.

Innovation Solution

A user equipment (UE) reports temporal correlation values of channel clusters to a network entity, enabling the base station to improve channel prediction and precoder performance, enhancing MU-MIMO operations and overall cell throughput.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If channel prediction is improved using traditional methods, then reliability of wireless communications is improved, but device complexity increases due to complex processing requirements

Engineering Contradiction:

Improvereliability of wireless communicationsVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and reports only the essential temporal correlation values of channel clusters rather than complete channel state information. This selective extraction reduces the amount of data that needs to be processed and transmitted, thereby reducing device complexity while maintaining reliable channel prediction through the use of these condensed correlation metrics.

Inventive Principle:

Principle #2Taking out (Extraction)

2Productivity

If more users and streams are supported in MU-MIMO, then productivity of wireless communications is improved, but measurement precision of channel conditions deteriorates due to increased complexity

Engineering Contradiction:

Improveoverall cell throughputVSAvoidchannel prediction accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by computing and reporting temporal correlation values specifically for individual channel clusters rather than treating the entire channel uniformly. This cluster-specific approach maintains measurement precision for each local channel condition while enabling the system to support multiple users and streams simultaneously, thereby improving overall cell throughput without sacrificing channel prediction accuracy.

Inventive Principle:

Principle #3Local quality

3Reliability

If precoder accuracy is enhanced for MU-MIMO, then reliability of wireless communications is improved, but loss of time increases due to additional reporting and processing

Engineering Contradiction:

ImproveMU-MIMO precoder accuracyVSAvoidtime for reporting and processing

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent changes the parameter being reported from complete channel state information to condensed temporal correlation values. This parameter transformation maintains precoder accuracy by preserving the essential temporal characteristics of channel clusters while significantly reducing the time required for reporting and processing, as the correlation values are more compact and require less computational resources to process.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12501437B2Channel correlation report for improving channel prediction

Publication Date: 2025.12.16 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide method for wireless communications by a user equipment (UE), generally including receiving one or more signals, from a network entity, over a channel, wherein the channel is modeled as a plurality of clusters, determining a plurality of time correlation values for the channel based on the one or more signals, and transmitting a report indicating the plurality of time correlation values for the channel.