CSI Codebook Parameters and Indication for Beyond-32 Ports

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) codebook parameters and indications, particularly in 5G communication systems, which affect radio interface efficiency and coverage.

Innovation Solution

The implementation of a user equipment (UE) and a base station (BS) configured to transmit and receive CSI reports associated with a specific RRC parameter codebookType set to 'typeII-r19', 'typeII-FePortSelection-r19', or 'typeII-Doppler-r19', where the number of CSI-RS antenna ports is greater than 32.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If CSI-RS antenna ports are increased beyond 32 to support more antenna elements, then the system can support higher-order MIMO and improve spatial coverage, but the CSI codebook parameter configuration and indication becomes more complex and less efficient

Engineering Contradiction:

Improveantenna port configuration capabilityVSAvoidCSI codebook parameter configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the CSI codebook configuration into separate components: a first codebook for spatial domain basis vectors and a second codebook for frequency-domain basis vectors. This segmentation allows independent configuration and selection of parameters, reducing the overall complexity when supporting beyond-32 antenna ports while maintaining adaptability for higher-order MIMO systems.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic indication mechanisms where the UE can be configured with different codebook types (typeII-r19, typeII-FePortSelection-r19, typeII-Doppler-r19) and the system can dynamically select appropriate codebook parameters based on the number of antenna ports and channel conditions. This dynamic approach allows efficient adaptation to varying system configurations without requiring complex static parameter sets.

Inventive Principle:

Principle #15Dynamics

2Area of stationary object

If the number of antenna ports is increased to support advanced MIMO techniques, then radio interface coverage is improved, but the efficiency of CSI feedback and codebook management deteriorates

Engineering Contradiction:

Improveradio interface coverageVSAvoidCSI feedback efficiency

Core Design Contradiction:

Area of stationary objectVSProductivity

Solution Approach 1:

The patent divides the CSI feedback into separate spatial and frequency domain components, each handled by dedicated codebooks. The first codebook handles spatial domain basis vectors while the second codebook handles frequency-domain basis vectors, enabling efficient CSI feedback for beyond-32 antenna ports by processing dimensions separately rather than treating them as a single complex problem.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs parameter changes through different codebook types (typeII-r19, typeII-FePortSelection-r19, typeII-Doppler-r19) that can be configured based on the number of antenna ports. This allows the system to adjust codebook parameters dynamically to maintain efficient CSI feedback while supporting increased antenna port configurations for expanded radio coverage.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If codebook parameter configuration is simplified for easier implementation, then device complexity is reduced, but the ability to support advanced antenna configurations beyond 32 ports is limited

Engineering Contradiction:

Improvecodebook configuration ease of implementationVSAvoidantenna port configuration capability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent segments the codebook configuration into manageable components with clear parameter definitions. The first codebook for spatial domain and second codebook for frequency domain provide structured parameter sets that are easier to implement while still supporting beyond-32 antenna ports through their combined capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent creates universal codebook types (typeII-r19, typeII-FePortSelection-r19, typeII-Doppler-r19) that can be configured for different numbers of antenna ports. These universal codebook configurations provide a standardized approach that simplifies implementation while maintaining versatility to support various antenna port configurations including beyond-32 ports.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250293837A1CSI codebook parameter and indication

Publication Date: 2025.09.18 SAMSUNG ELECTRONICS CO LTD

AI summary

Apparatuses and methods for channel state information (CSI) codebook parameters and indication. A method performed by a user equipment (UE) includes receiving information including a radio resource control (RRC) parameter codebookType set to ‘typeII-r19’, ‘typeII-FePortSelection-r19’, or ‘typeII-Doppler-r19’ and related to PCSI-RS channel state information reference signal (CSI-RS) antenna ports, where PCSI-RS is greater than 32. The method further includes, based on the information, determining a CSI report associated with the PCSI-RS CSI-RS antenna ports and transmitting the CSI report.