ML-Based Channel Prediction in Wireless Systems

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Solution Overview

Problem

Current channel prediction techniques in wireless communication systems, such as those used in 4G and 5G, face inefficiencies due to changes in the radio channel caused by mobility, leading to reduced transmission rates, and lack methods for configuring prediction-related functions, measuring prediction performance, delivering channel measurement information, and collecting training data for machine learning models.

Innovation Solution

A method and apparatus for channel prediction that involves a terminal transmitting channel state prediction-related information to a base station, receiving and transmitting channel prediction information, using auxiliary reference signals, and generating fallback CSI when prediction is impossible or inaccurate, while also requesting and collecting training data for channel prediction models.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If current CSI delivery scheme is used in mobile communication systems, then transmission can be maintained, but errors occur due to radio channel changes caused by mobility, resulting in reduced transmission rates

Engineering Contradiction:
Improvetransmission rateVSAvoidchannel information accuracy
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by predicting future channel states before actual transmission occurs. The machine learning model processes past channel information to generate predictions for future time points, allowing the system to proactively adapt to channel changes rather than reactively correcting errors. This enables transmission parameters to be optimized in advance based on predicted channel conditions.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms by continuously monitoring actual channel measurements and comparing them with predicted values. The system uses measurement information from multiple time points as input to the prediction model, creating a closed-loop system where past observations inform future predictions, and prediction accuracy is continuously improved through accumulated training data.

Inventive Principle:
Principle #23Feedback

2Productivity

If machine learning-based channel prediction is implemented, then transmission rate can be improved through accurate predictions, but system complexity increases due to lack of configuration methods and training data collection mechanisms

Engineering Contradiction:
Improvetransmission rateVSAvoidprediction system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a multi-functional prediction system that handles multiple tasks: channel state prediction, measurement information collection, model training data accumulation, and performance evaluation. The same infrastructure serves both operational prediction and model improvement functions, reducing overall system complexity despite the advanced capabilities provided.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent segments the prediction system into distinct functional modules: a prediction model module that performs channel state prediction, a measurement information management module that collects and organizes training data, and an evaluation module that assesses prediction performance. This modular architecture simplifies implementation and maintenance while enabling accurate predictions.

Inventive Principle:
Principle #1Segmentation

3Measurement precision

If channel prediction is performed using past channel information, then future channel states can be predicted, but prediction accuracy decreases when mobility causes rapid channel changes

Engineering Contradiction:
Improvechannel prediction accuracyVSAvoidchannel change rate
Core Design Contradiction:
Measurement precisionVSSpeed

Solution Approach 1:

The patent ensures continuity of useful action by continuously collecting measurement information at multiple time points and continuously training the prediction model with accumulated data. The system maintains an ongoing process of learning from channel variations, ensuring that the prediction model adapts to changing mobility patterns rather than becoming obsolete as channel conditions evolve.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The patent applies dynamics by making the prediction model adaptive to changing channel conditions. The system dynamically updates prediction parameters based on observed channel variations and mobility patterns. The prediction mechanism adjusts to different mobility scenarios by learning from historical data, enabling accurate predictions even when channel changes accelerate.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20240155405A1Method and apparatus for feedback channel status information based on machine learning in wireless communication system
Publication Date: 2024.05.09 ELECTRONICS & TELECOMM RES INST
  • US20240155405A1 patent drawing
  • US20240155405A1 patent drawing
  • US20240155405A1 patent drawing

AI summary

A method of a terminal may comprise: transmitting channel state prediction-related information to a base station; receiving a channel prediction request signal for a first time instance from the base station; receiving auxiliary reference signal(s) (RS(s)) and a first RS from the base station based on the channel state prediction-related information; and transmitting channel prediction information for the first time instance to the base station, wherein the channel state prediction-related information includes information indicating that channel state information prediction of the terminal is possible, and the channel prediction request signal includes configuration information of the auxiliary RS(s) and configuration information of the first RS.