Multi-Panel Terminal Panel-Specific CSI Reporting

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Solution Overview

Problem

Current radio communication systems, particularly in future systems like Rel. 17 NR, face challenges in uplink beam selection for user terminals with multiple panels, as they lack the capability to perform panel-specific CSI reports, leading to suboptimal communication throughput.

Innovation Solution

A terminal is equipped with a receiving section for channel state information (CSI) measurement across multiple panels and a control section that determines which CSI measurement results to include in a panel-specific CSI report, enabling appropriate reporting and beam selection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the UE performs CSI measurement for multiple panels, then the beam selection capability is improved, but the system cannot generate appropriate CSI reports without panel-specific reporting capability

Engineering Contradiction:

Improvebeam selection capabilityVSAvoidCSI report accuracy

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent segments the CSI reporting process by introducing panel IDs to identify and differentiate CSI measurements from multiple panels. Each panel's CSI measurement results are independently identified and reported, allowing the system to maintain accurate CSI information for each panel while supporting multi-panel operations.

Inventive Principle:

Principle #1Segmentation

2Productivity

If panel-specific CSI reporting is implemented, then communication throughput is improved, but the system complexity increases

Engineering Contradiction:

Improvecommunication throughputVSAvoidreporting system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements a universal panel ID mechanism that can be applied across different CSI reporting scenarios and configurations. The panel ID field serves multiple functions: identifying measurement panels, associating CSI reports with specific panels, and enabling flexible reporting configurations without requiring separate mechanisms for each scenario.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Loss of information

If the UE reports all CSI measurement results from multiple panels, then the information completeness is improved, but the reporting overhead increases

Engineering Contradiction:

ImproveCSI information completenessVSAvoidreporting overhead

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent enables selective reporting by allowing the network to configure which panels' CSI measurements should be reported based on local conditions and requirements. Different panels can have different reporting configurations, enabling the system to report only the necessary CSI information for each panel rather than uniformly reporting all measurements.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12278785B2Terminal, radio communication method, and base station

Publication Date: 2025.04.15 NTT DOCOMO INC

AI summary

A terminal according to one aspect of the present disclosure includes: a receiving section that performs channel state information (CSI) measurement regarding a plurality of panels; and a control section that determines which results of the CSI measurement related to which panel are to be included in a CSI report. According to one aspect of the present disclosure, a panel specific CSI report can be appropriately used.