METHOD OF FEEDBACK OF CHANNEL, DEVICE, TERMINAL AND NETWORK SIDE STATE INFORMATION, AND STORAGE MEDIA

By using beamformed CSI-RSs and frequency domain base vector indication, the method addresses high computation and feedback overhead in CSI feedback, improving system performance in 5G NR systems.

BR112022015632B1Active Publication Date: 2026-07-14DATANG MOBILE COMM EQUIP CO LTD
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Patent Information

Authority / Receiving Office
BR · BR
Patent Type
Patents
Current Assignee / Owner
DATANG MOBILE COMM EQUIP CO LTD
Filing Date
2021-02-09
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The high computation complexity and feedback overhead in channel state information (CSI) feedback in 5G NR systems, particularly due to Singular Value Decomposition (SVD) calculations and downlink delay information reporting, limit system performance enhancement.

Method used

A method for CSI feedback that involves receiving beamformed CSI-RSs and frequency domain base vector indication, determining port indication information and port matching coefficients based on beamformed CSI-RSs and frequency-domain base vectors, and feeding back these to the network side to reduce computational complexity and overhead.

Benefits of technology

Reduces terminal computational complexity and feedback overhead, enhancing system performance by allowing the terminal to determine port indication and combination coefficients without additional downlink channel calculations.

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Abstract

METHOD FOR FEEDBACK OF CHANNEL, DEVICE, TERMINAL AND NETWORK SIDE STATE INFORMATION, AND STORAGE MEDIA. A method, device for feedback of channel, terminal and network side state information and storage media are provided in the embodiments of this application. The method comprises: receiving a CSI-RS for beamforming that is sent by a network side through an antenna port, or a CSI-RS for beamforming and frequency domain base vector indication information, wherein the beam used in beamforming is determined based on a spatial domain base vector or based on the spatial domain base vector and the frequency domain base vector, and the spatial domain base vector and the frequency domain base vector are determined based on an uplink channel;Based on CSI-RS for beamforming, or CSI-RS for beamforming and frequency-domain base vector indication information, determine port indication information and a port matching coefficient for data transmission; and feed back the port indication information and port matching coefficient from the network side to the network side to determine the downlink transmission data code pre-conversion. The method, device, terminal, network side, and storage media provided by the embodiments of this application reduce computational complexity, reduce feedback overhead, and enhance system performance.
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