Codebook-Based Uplink Data Transmission in Wireless Systems

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently supporting uplink data transmission operations, particularly in next-generation mobile communication systems that require high data transfer rates, low latency, and energy efficiency, due to increased data traffic and the need for advanced techniques like massive MIMO and non-orthogonal multiple access.

Innovation Solution

A codebook-based method for uplink data transmission using a new waveform, specifically Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), which supports various transmission operations such as non-coherent, partial-coherent, and full-coherent transmission, and is designed to optimize antenna port configurations and precoding for improved performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If codebook-based uplink data transmission is implemented in next-generation wireless communication systems, then data transfer rates and energy efficiency are improved, but system complexity and device configuration requirements increase

Engineering Contradiction:
Improvedata transfer rateVSAvoidsystem complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The codebook is divided into multiple codebook groups, each corresponding to different transmission scenarios (coherent, partial-coherent, non-coherent transmission). This segmentation allows the system to select appropriate codebooks based on specific transmission conditions, improving data transfer rates while managing system complexity through organized classification.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic codebook selection and configuration mechanisms where the UE and base station can adaptively choose different codebook groups based on channel conditions, transmission requirements, and capability negotiations. This dynamic approach enables the system to optimize performance for different scenarios without requiring all complex features to be always active.

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If new codebooks are designed to support various transmission operations (non-coherent, partial-coherent, full-coherent), then transmission versatility is improved, but codebook configuration complexity increases

Engineering Contradiction:
Improvetransmission versatilityVSAvoidcodebook configuration complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent designs a universal codebook framework where a single codebook structure can support multiple transmission operations (non-coherent, partial-coherent, and full-coherent transmission) through configurable parameters. This multi-functionality allows the same codebook infrastructure to serve diverse transmission needs, enhancing versatility while avoiding the need for completely separate codebook sets for each transmission type.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent utilizes parameter-based configuration to differentiate between various transmission operations within a unified codebook structure. By changing specific parameters (such as coherence assumptions, antenna port configurations, and precoding indicators), the system can adapt the same codebook to support different transmission modes, reducing configuration complexity compared to maintaining separate codebooks for each mode.

Inventive Principle:
Principle #35Parameter changes

3Productivity

If codebook-based transmission with multiple antenna ports is implemented, then spectral efficiency is improved, but payload size and signaling overhead increase

Engineering Contradiction:
Improvespectral efficiencyVSAvoidpayload size
Core Design Contradiction:
ProductivityVSLoss of information

Solution Approach 1:

The patent extracts and separates different types of information in the uplink grant signaling. Specifically, it extracts the codebook group indicator, transmission type indicator, and antenna port indication as distinct fields. This extraction allows the system to efficiently convey multiple pieces of information about codebook configuration without requiring a single large payload, thereby improving spectral efficiency while managing signaling overhead through structured information separation.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentEP3562052B1Method for transmitting uplink data in wireless communication system and apparatus therefor
Publication Date: 2024.05.29 LG ELECTRONICS INC
  • EP3562052B1 patent drawingFigure 1(a)~1(b)
  • EP3562052B1 patent drawingFigure 2
  • EP3562052B1 patent drawingFigure 3

AI summary

A method for transmitting Physical Uplink Shared Channel (PUSCH) performed by a User Equipment (UE) in a wireless communication system may include receive downlink control information (DCI) for uplink (UL) transmission scheduling; and performing codebook based PUSCH transmission based on precoding information included in the DCI.