Periodic-Aperiodic CSI Reporting for 3D MIMO Port Segmentation

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Solution Overview

Problem

Existing MIMO systems face challenges in managing feedback overhead for channel state information (CSI) reporting, particularly in 3D MIMO scenarios with large numbers of antenna ports, leading to inefficiencies and potential data dropping due to limited multiplexing bits.

Innovation Solution

Configuring different parameters for periodic and aperiodic CSI reporting, allowing for reduced feedback overhead by selectively reporting CSI for a subset of antenna ports and using separate resources for each type of reporting, such as PUCCH for periodic and PUSCH for aperiodic reporting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If CSI reporting is performed for all antenna ports in 3D MIMO systems, then channel state information accuracy is improved, but feedback overhead increases significantly

Engineering Contradiction:

Improvechannel state information accuracyVSAvoidfeedback overhead

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent segments the antenna ports into two groups: a first set of antenna ports for which CSI is reported periodically, and a second set of antenna ports for which CSI is reported aperiodically. This segmentation allows the system to manage feedback overhead by selectively reporting CSI for different antenna port groups using different reporting mechanisms, thereby reducing the total feedback overhead while maintaining channel state information accuracy for the most important antenna ports through periodic reporting.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic switching between periodic and aperiodic reporting modes for different antenna ports. The base station can dynamically configure which antenna ports use periodic reporting and which use aperiodic reporting based on current channel conditions and system requirements. This dynamic approach allows the system to adapt feedback overhead to actual needs while maintaining necessary measurement precision.

Inventive Principle:

Principle #15Dynamics

2Loss of information

If periodic CSI reporting is configured for all antenna ports, then channel state information coverage is improved, but resource consumption increases

Engineering Contradiction:

Improvechannel state information coverageVSAvoidresource consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The patent segments antenna ports into different reporting categories, with only the first set of antenna ports configured for periodic CSI reporting. This segmentation ensures that channel state information coverage is maintained for the most critical antenna ports through periodic reporting, while reducing resource consumption by excluding the second set of antenna ports from periodic reporting requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies partial action by configuring periodic CSI reporting only for a subset (first set) of antenna ports rather than all antenna ports. This partial approach is sufficient to maintain adequate channel state information coverage for system operation while significantly reducing the resource consumption associated with full periodic reporting across all antenna ports.

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If separate resources are allocated for periodic and aperiodic reporting, then reporting flexibility is improved, but system complexity increases

Engineering Contradiction:

Improvereporting flexibilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the reporting resources into separate allocations for periodic and aperiodic reporting. Different physical uplink channels (PUCCH for periodic, PUSCH for aperiodic) are used for different antenna port sets. This segmentation provides reporting flexibility by allowing independent configuration and optimization of periodic and aperiodic reporting resources, while the segmentation itself helps manage system complexity through structured resource separation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs universal resource allocation where the same UE capability supports both periodic and aperiodic reporting mechanisms. The base station can universally apply the configured reporting parameters across different antenna ports and reporting types, allowing the system to maintain flexibility through a unified configuration framework that handles multiple reporting scenarios without requiring separate dedicated mechanisms for each case.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12425899B2Periodic and aperiodic channel state information (CSI) reporting for MIMO

Publication Date: 2025.09.23 QUALCOMM INC

AI summary

Certain aspects of the present disclosure provide techniques for performing periodic and aperiodic CSI reporting for MIMO operations. According to certain aspects, operations for performing periodic and aperiodic CSI reporting for MIMO generally includes configuring a user equipment (UE) that is capable of MIMO with different parameters for periodic and aperiodic channel state information (CSI) reporting, wherein the different parameters indicate at least one of what resources to measure or what information to report, and receiving periodic and aperiodic CSI reporting from the UE according to the configuration.