CSI-RS Configuration for Wireless Channel State Reporting

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently reporting channel state information using aperiodic channel state information-reference signals (CSI-RS), particularly due to high DCI overhead when dealing with a large number of antenna ports, which is exacerbated in New RAT environments.

Innovation Solution

The method involves configuring CSI-RS resource sets with predefined time and frequency resources, allowing for efficient measurement and reporting of channel state information by indicating CSI-RS configurations for beam management and channel state information separately, reducing DCI overhead through optimized resource allocation and signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If aperiodic CSI-RS is used for channel state reporting, then channel state measurement accuracy is improved, but DCI overhead increases significantly when dealing with large number of antenna ports

Engineering Contradiction:
Improvechannel state measurement accuracyVSAvoidDCI overhead
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent segments the large set of antenna ports into multiple groups, where each group is associated with a separate CSI report configuration. This segmentation allows the system to manage CSI reporting for large numbers of antenna ports without requiring a single large DCI message, thereby reducing DCI overhead while maintaining measurement accuracy across all ports.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimension for managing antenna ports by associating multiple CSI report configurations with different antenna port groups. Instead of managing all ports in a single dimension, the system uses multiple configurations (an additional dimension) to handle different port groups, reducing the complexity and overhead of DCI signaling.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Productivity

If separate CSI-RS configurations are used for beam management and channel state information, then resource allocation efficiency is improved, but configuration complexity increases

Engineering Contradiction:
Improveresource allocation efficiencyVSAvoidconfiguration complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent creates a universal CSI-RS configuration framework where a single configuration structure can serve multiple purposes: beam management and channel state information reporting. By making the configuration multi-functional, the system improves resource allocation efficiency without proportionally increasing configuration complexity, as the same configuration template is reused for different functions.

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

Solution Approach 2:

The patent introduces dynamic activation and deactivation of CSI report configurations based on current communication needs. The system can dynamically enable or disable specific configurations for beam management or CSI reporting as required, allowing flexible resource allocation while keeping the overall configuration manageable through on-demand activation rather than permanent complexity.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS10601484B2Method for reporting channel state in wireless communication system, and device therefor
Publication Date: 2020.03.24 LG ELECTRONICS INC
  • US10601484B2 patent drawing
  • US10601484B2 patent drawing
  • US10601484B2 patent drawing

AI summary

A channel state reporting method based on a channel state information-reference signal (CSI-RS) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving a CSI-RS-related configuration from a base station; calculating a CSI by measuring a CSI-RS according to the CSI-RS-related configuration; and transmitting the calculated CSI to the base station, wherein the CSI-RS-related configuration may include a CSI-RS configuration for a CSI or a CSI-RS configuration for beam management (BM).