CSI Request Field Configuration for Flexible Uplink Control

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Solution Overview

Problem

Current wireless communication systems face limitations in flexibility and efficiency, particularly in managing uplink control information on the mini-slot physical uplink shared channel (PUSCH), which affects communication capacity, speed, and flexibility.

Innovation Solution

The implementation of user equipment (UE) and base station configurations that include reception and transmission circuitry for handling downlink control information (DCI) on a physical downlink control channel (PDCCH) and channel state information (CSI) reports on a physical uplink shared channel (PUSCH), with specific configurations for CSI request fields and trigger states for aperiodic CSI reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple DCI formats are configured with separate CSI request fields, then CSI reporting flexibility is improved, but device complexity increases

Engineering Contradiction:

ImproveCSI reporting flexibilityVSAvoidUE and base station configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the CSI request configuration by creating separate DCI formats (e.g., DCI format 0_1 and DCI format 0_2) each with their own CSI request fields and trigger state configurations. This allows independent optimization of CSI reporting for different uplink transmission scenarios without interfering with each other, thereby improving flexibility while managing complexity through structured separation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent enables dynamic selection of different DCI formats and their corresponding CSI request fields based on the specific transmission scenario. The UE and base station can dynamically switch between different CSI reporting configurations depending on the scheduled uplink transmission type, making the system adaptable to varying requirements without being locked into a single complex configuration.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If separate trigger states are configured for different DCI formats, then aperiodic CSI reporting precision is improved, but signaling overhead increases

Engineering Contradiction:

ImproveAperiodic CSI reporting precisionVSAvoidSignaling overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent divides trigger state configurations into separate groups associated with different DCI formats. Each DCI format has its own CSI request field that points to specific trigger states configured for that format. This segmentation allows precise control of aperiodic CSI reporting for each transmission scenario while avoiding the need for a single large-scale trigger state configuration that would increase overhead.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12199921B2User equipments, base stations and methods for CSI request

Publication Date: 2025.01.14 SHARP KK

AI summary

The UE includes reception circuitry configured to receive first information, second information, a first downlink control information (DCI) on a physical downlink control channel (PDCCH), and a second DCI on a PDCCH. The UE also includes transmission circuitry configured to transmit a channel state information (CSI) report on a physical uplink shared channel (PUSCH). A CSI request field in the first DCI is configured by the first information. A CSI request field in the second DCI is configured by the second information. The first information includes trigger states for aperiodic CSI reporting for the first DCI. The CSI request field in the second DCI is configured by the second information.