Method and apparatus for reducing CSI feedback overhead in wireless communication system

A compression-based CSI reporting framework addresses the challenge of high CSI feedback overhead in next-generation MIMO systems by using a low-resolution codebook with spatial-, frequency-, and time-domain components, effectively reducing overhead while maintaining accurate channel information.

WO2025116595A1PCT designated stage expired Publication Date: 2025-06-05SAMSUNG ELECTRONICS CO LTD
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Patent Information

Application Number
PCT/KR2024/019241
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-19
Filing Date
2024-11-29
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

Current wireless communication systems face challenges in reducing channel state information (CSI) feedback overhead, particularly as the number of antenna ports increases in next-generation MIMO systems.

Method used

The proposed solution involves a compression-based CSI reporting framework that utilizes a low-resolution codebook with spatial-, frequency-, and time-domain components, allowing for efficient CSI feedback by selecting a subset of antenna ports and using orthogonal basis sets for beamforming.

Benefits of technology

This approach significantly reduces CSI feedback overhead while maintaining accurate channel information, enabling efficient operation in next-generation MIMO systems with a large number of antenna ports.

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Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Apparatuses and methods for reduced channel state information (CSI) feedback overhead. A method performed by a user equipment (UE) includes receiving information about a channel state information (CSI) report. The information indicates an antenna port group, wideband (WB) or sub-band (SB) reporting, and a physical uplink control channel (PUCCH) format X, where X=2,3,or 4. The method further includes determining, based on the information, a spatial domain (SD) basis vector bl for each layer and determining, based on the information, an inter-polarization coefficient value cl for each layer. The method further includes determining, based on the information, a channel quality indicator (CQI) and transmitting the CSI report on the PUCCH format X. The CSI report includes a rank indicator (RI), a precoding matrix indicator (PMI), and the CQI. The PMI indicates the SD basis vector and the inter-polarization coefficient value. The RI indicates a rank value.
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Citation Information

Patent Citations

  • Method and apparatus for reporting channel state information in a wireless communication system

    US20210050895A1

  • Reporting rank indication and layer-specific coefficient quantities for type ii channel state information (CSI) compression using two-part csi

    US20220131589A1

  • Method and apparatus to CSI reporting using multiple antenna panels in advanced wireless communication systems

    US20230140316A1

  • Method and apparatus for CSI codebook

    US20230246688A1

  • Method for transmitting and receiving channel state information in wireless communication system, and apparatus therefor

    US20230261714A1