Multiple Codebook CSI Prioritization Under PUCCH Limits

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Solution Overview

Problem

In wireless communications systems, when a user equipment (UE) is configured with multiple codebooks for channel state information (CSI) reporting, the physical uplink control channel (PUCCH) resource may be insufficient to carry the CSI bits, leading to the need for prioritization of CSI feedback.

Innovation Solution

The UE determines a priority order for the codebooks and drops one or more codebooks based on this priority, with the primary codebook having the highest priority, to manage CSI reporting efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple codebooks are configured for CSI reporting, then CSI reporting capability is improved, but PUCCH resource capacity is exceeded

Engineering Contradiction:

ImproveCSI reporting capabilityVSAvoidPUCCH resource capacity

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent extracts and prioritizes only the most important CSI feedback information by assigning different priority levels to different codebooks. When PUCCH resources are insufficient, lower priority codebooks are dropped while higher priority codebooks are transmitted, thus extracting only the essential information that fits within the limited resource capacity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the CSI reporting into multiple priority levels by dividing codebooks into different priority groups. This segmentation allows the system to selectively transmit high-priority CSI feedback while dropping low-priority feedback when resources are constrained, resolving the contradiction between comprehensive reporting capability and limited transmission resources.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple codebooks are configured for CSI reporting, then link performance adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvelink performance adaptabilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent introduces dynamic priority-based selection that allows the system to adapt its behavior based on resource availability. The UE dynamically determines which codebooks to transmit based on their priority levels and the available PUCCH resources, providing flexible adaptability without requiring complex static configurations for every possible scenario.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent enables the UE to autonomously perform priority-based codebook selection and dropping without requiring complex network intervention. The UE self-determines which CSI feedback to transmit based on configured priority levels and available resources, reducing overall system complexity while maintaining adaptability.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12407388B2Multiple codebook channel state information report prioritization

Publication Date: 2025.09.02 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide techniques for multiple codebook channel state information (CSI) report prioritization. A method of wireless communications by a user equipment (UE) includes receiving a CSI report configuration that configures one or more CSI reference signal (CSI-RS) resource sets. Each CSI-RS resource set includes one or more CSI-RS resources. The CSI report configuration also configures a plurality of codebooks for reporting CSI. The method includes receiving a priority order for the plurality of codebooks and reporting CSI based on the CSI report configuration and the priority order.