Dynamic Channel State Feedback Switching for MU-MIMO Overhead

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Solution Overview

Problem

In wireless communication systems, especially in multi-user MIMO scenarios, conventional channel state feedback lacks the necessary accuracy and flexibility, leading to reduced performance due to increased inter-channel interference and inefficient resource allocation.

Innovation Solution

An electronic device and communication method that dynamically switches between different types of channel state feedback based on the determination of required accuracy and interference levels, allowing for reallocation of resources to optimize channel state information reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If enhanced channel state feedback is used to provide higher spatial resolution and richer channel information, then the accuracy of channel state information is improved, but the overhead on processing and transmission increases

Engineering Contradiction:

Improveaccuracy of channel state informationVSAvoidoverhead on processing and transmission

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The system dynamically switches between conventional and enhanced channel state feedback types based on current channel conditions, spatial resolution requirements, and available overhead resources. This allows the feedback mechanism to adapt its complexity and resource consumption in real-time, using enhanced feedback only when necessary for high accuracy requirements while maintaining lower overhead during normal operations

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the parameters of channel state feedback by introducing multiple feedback types with different levels of detail and spatial resolution. The system can adjust the granularity and richness of feedback information based on channel scattering conditions and performance requirements, transforming the fixed feedback structure into a variable one that optimizes the balance between accuracy and overhead

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If conventional channel state feedback is used to reduce overhead, then the processing and transmission resources are optimized, but the accuracy of channel state information is insufficient for acute channel scattering

Engineering Contradiction:

Improveoverhead on processing and transmissionVSAvoidaccuracy of channel state information

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The system dynamically selects between conventional and enhanced feedback modes based on detected channel conditions. When acute channel scattering is detected, the system automatically transitions to enhanced feedback to maintain accuracy, while returning to conventional feedback under normal conditions to minimize overhead, creating an adaptive feedback system that responds to real-time channel characteristics

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The channel state feedback system performs self-adjustment by monitoring channel conditions and automatically selecting the appropriate feedback type without requiring external intervention. The system serves itself by detecting when enhanced accuracy is needed and activating the corresponding feedback mechanism, optimizing resource usage based on actual performance requirements

Inventive Principle:

Principle #25Self-service

3Device complexity

If a fixed channel state feedback type is used to simplify system design, then the implementation complexity is reduced, but the system cannot adapt to different interference and resource conditions

Engineering Contradiction:

Improvesystem design complexityVSAvoidadaptability to different interference and resource conditions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The invention transforms a static feedback system into a dynamic one by introducing multiple feedback types and selection mechanisms. The system can switch between conventional and enhanced feedback based on channel conditions, interference levels, and resource availability, providing adaptability while maintaining a relatively simple base structure that builds upon existing conventional feedback mechanisms

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The channel state feedback system achieves multi-functionality by incorporating both conventional and enhanced feedback capabilities within a single unified framework. This allows the system to serve multiple purposes - maintaining backward compatibility with existing systems while providing enhanced accuracy when needed, and adapting to various interference and resource conditions through selective activation of different feedback modes

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11637596B2Electronic device, communication method and storage medium in wireless communication system to make an optimum compromise between the accuracy of the channel state information and the overhead

Publication Date: 2023.04.25 SONY GROUP CORP

AI summary

An electronic device for a base station in a wireless communication system including processing circuitry configured to indicate a user equipment to report a first type of channel statement information based on a reference signal for the first type of channel statement information, wherein the base station serves the user equipment in a way of SU-MIMO, make a determination that a second type of channel statement information is required in a case that the base station changes the way serving the user equipment from SU-MIMO to MU-MIMO, and notify the user equipment to report the second type of channel statement information based on a reference signal for the second type of channel statement information.