Method for reporting channel state information (CSI), and terminal and network-side device

By reporting channel information and spatial beam or space-frequency vector pairs from a subset of ports via the terminal, the network-side equipment reconstructs the channel information of the entire port set, solving the problem of high CSI reporting overhead and achieving high efficiency in CSI reporting.

WO2026145151A1PCT designated stage Publication Date: 2026-07-09VIVO MOBILE COMM CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
VIVO MOBILE COMM CO LTD
Filing Date
2025-12-23
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

In existing technologies, terminals need to report the complete CSI corresponding to each sub-configuration in the CSI report, resulting in a large CSI reporting overhead.

Method used

The terminal reports the channel information corresponding to a subset of ports in the full port set and the spatial beam or space-frequency vector pair corresponding to the full port set. Based on this, the network-side device reconstructs the channel information of the full port set. Alternatively, the terminal reports the channel information corresponding to a second port set and the RI and CQI of at least one sub-configuration information. Based on this information, the network-side device determines the channel information of different port sets.

Benefits of technology

This effectively reduces CSI reporting overhead and avoids the need for the terminal to report the complete CSI corresponding to each sub-configuration.

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Abstract

The present application relates to the technical field of communications. Disclosed are a method for reporting channel state information (CSI), and a terminal and a network-side device. The method in the embodiments of the present application comprises: a terminal acquiring a reporting configuration; the terminal sending a CSI report to a network-side device on the basis of the reporting configuration, wherein the CSI report comprises first information and second information, the first information being used for indicating channel information corresponding to a first port set, the channel information corresponding to the first port set comprising at least one of a covariance matrix, a channel matrix and a precoding matrix, the second information being used for indicating a first spatial domain beam or a first spatial-frequency vector pair that corresponds to a full port set, and the first port set being a subset of the full port set.
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