FEEDBACK METHOD FOR CHANNEL STATE INFORMATION AND COMMUNICATION APPARATUS

Title:

FEEDBACK METHOD FOR CHANNEL STATE INFORMATION AND COMMUNICATION APPARATUS

Document Type and Number:

WIPO Patent Application WO/2024/001859

Kind Code:

A1

Abstract:

Disclosed in the present application are a feedback method for channel state information and a communication apparatus, which are used for enabling a network device to determine N space-frequency joint vectors representing jointed space-frequency domain compression, so as to reduce the feedback overhead of a terminal device. The method comprises: a terminal device receiving a precoded reference signal sent by a network device, the precoded reference signal being obtained by precoding a reference signal according to a spatial domain basis vector matrix, the spatial domain basis vector matrix comprising at least one spatial domain basis vector, and each spatial domain basis vector being associated with one reference signal port; and then the terminal device determining channel state information (CSI) according to the precoded reference signal, and sending to the network device the CSI, the CSI comprising first indication information used for indicating M reference signal port-frequency domain basis vector pairs and second indication information used for indicating M groups of first combination coefficients, so as to enable the network device to determine N space-frequency joint vectors according to the M reference signal port-frequency domain basis vector pairs and the M groups of first combination coefficients.

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Inventors:

LI TING (CN)
WANG XIAOHAN (CN)
JIN HUANGPING (CN)

Application Number:

PCT/CN2023/101208

Publication Date:

January 04, 2024

Filing Date:

June 20, 2023

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H04L5/00; H04B7/0456; H04B17/30

Foreign References:

CN114204970A	2022-03-18
CN109302220A	2019-02-01
CN110830092A	2020-02-21
CN110855336A	2020-02-28
US20160142115A1	2016-05-19
US20160191128A1	2016-06-30

Other References:

ALCATEL-LUCENT, PHILIPS: "Dedicated Reference Signals for Precoding in E-UTRA Downlink", 3GPP TSG RAN WG1 MEETING #48BIS R1-071718, 3 April 2007 (2007-04-03), XP050105640
CATT: "CSI feedback for beamformed CSI-RS on PUCCH", 3GPP TSG RAN WG1 MEETING #82, R1-153945, 15 August 2015 (2015-08-15), XP050993046

Attorney, Agent or Firm:

SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)

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