Terminal Group-Based CSI Report Configuration for Inter-Cell Mobility

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Solution Overview

Problem

In future radio communication systems, particularly in Next-Generation Mobile Communication Systems like 5G and beyond, the group-based Channel State Information (CSI) report configuration for inter-cell mobility is not clearly defined, leading to reduced communication throughput due to inappropriate CSI reporting.

Innovation Solution

A terminal equipped with a receiving section to receive CSI report configurations including two Channel Measurement Resource (CMR) sets and a control section to manage the transmission of CSI reports, enabling appropriate group-based CSI reporting across multiple transmission/reception points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If group-based CSI report is supported for inter-cell mobility, then communication throughput can be improved, but the CSI report configuration becomes unclear and complex

Engineering Contradiction:

Improvecommunication throughputVSAvoidCSI report configuration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The invention segments the CSI report configuration by introducing two distinct CMR sets (first CMR set and second CMR set) with different purposes. The first CMR set is used for one type of CSI reporting while the second CMR set is used for another type, thereby dividing the complex configuration into manageable segments that can be clearly defined and implemented for inter-cell mobility scenarios

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention adds a new dimension to the CSI report configuration by introducing the concept of multiple CMR sets with different associations (serving cell vs. non-serving cell). This dimensional expansion allows the system to handle complex inter-cell mobility requirements by organizing CSI reporting resources in a multi-dimensional structure rather than a single flat configuration

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Productivity

If appropriate CSI report is not performed, then device complexity is reduced, but communication throughput is reduced

Engineering Contradiction:

Improvecommunication throughputVSAvoidCSI report performance

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The invention implements a feedback mechanism where the terminal device performs CSI measurement based on the configured CMR sets and reports the results to the network device. This feedback loop ensures that appropriate CSI reporting is performed, enabling the network to make informed decisions about inter-cell mobility and resource allocation, thereby improving communication throughput while maintaining clear operational procedures

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250024292A1Terminal, radio communication method, and base station

Publication Date: 2025.01.16 NTT DOCOMO INC

AI summary

A terminal according to one aspect of the present disclosure includes a receiving section that receives a channel state information (CSI) report configuration corresponding to a group-based CSI report and including two channel measurement resource (CMR) sets, and a control section that controls transmission of the CSI report, based on the CSI report configuration. According to one aspect of the present disclosure, the group-based CSI report can be appropriately performed.