WO2022148380A9 - Channel feedback method, information transmission method and device - Google Patents

Channel feedback method, information transmission method and device Download PDF

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Publication number
WO2022148380A9
WO2022148380A9 PCT/CN2022/070349 CN2022070349W WO2022148380A9 WO 2022148380 A9 WO2022148380 A9 WO 2022148380A9 CN 2022070349 W CN2022070349 W CN 2022070349W WO 2022148380 A9 WO2022148380 A9 WO 2022148380A9
Authority
WO
WIPO (PCT)
Prior art keywords
class
reference signal
codebook
basis
channel
Prior art date
Application number
PCT/CN2022/070349
Other languages
French (fr)
Chinese (zh)
Other versions
WO2022148380A1 (en
Inventor
吴丹
孙军帅
金婧
苏鑫
王启星
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国移动通信有限公司研究院, 中国移动通信集团有限公司 filed Critical 中国移动通信有限公司研究院
Publication of WO2022148380A1 publication Critical patent/WO2022148380A1/en
Publication of WO2022148380A9 publication Critical patent/WO2022148380A9/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/04013—Intelligent reflective surfaces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

Embodiments of the present application provide a channel feedback method, an information transmission method, and a device, which solve the problem in the prior art that a terminal cannot perform channel estimation and feedback on a reflection channel. The method in the embodiments of the present application comprises: receiving a class I reference signal and a class II reference signal, wherein the class I reference signal corresponds to a class I codebook, and the class II reference signal corresponds to a class II codebook; on the basis of the class I reference signal, feeding back a codeword selected on the basis of the class I codebook and a corresponding codebook type; and on the basis of the class II reference signal, feeding back a codeword selected on the basis of the class II codebook and a corresponding codebook type. By introducing the class II reference signal, the embodiments of the present application can realize channel estimation and feedback of the reflection channel, to accurately reflect the characteristics of the reflection channel, such that a base station obtains accurate channel information, and provides an accurate basis for the precoding calculation of the subsequent base station during beamforming.
PCT/CN2022/070349 2021-01-05 2022-01-05 Channel feedback method, information transmission method and device WO2022148380A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110005389.9 2021-01-05
CN202110005389.9A CN114726421A (en) 2021-01-05 2021-01-05 Channel feedback method, information transmission method and equipment

Publications (2)

Publication Number Publication Date
WO2022148380A1 WO2022148380A1 (en) 2022-07-14
WO2022148380A9 true WO2022148380A9 (en) 2022-10-06

Family

ID=82234577

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/070349 WO2022148380A1 (en) 2021-01-05 2022-01-05 Channel feedback method, information transmission method and device

Country Status (2)

Country Link
CN (1) CN114726421A (en)
WO (1) WO2022148380A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024082194A1 (en) * 2022-10-19 2024-04-25 北京小米移动软件有限公司 Precoding method and apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI617148B (en) * 2012-09-28 2018-03-01 內數位專利控股公司 Wireless transmit/receive unit and method for reporting feedback
CN110336597B (en) * 2013-05-10 2020-07-07 华为技术有限公司 Method for determining precoding matrix indicator, user equipment and storage medium
CN108365877B (en) * 2017-01-26 2021-06-01 华为技术有限公司 Codebook feedback method and device
WO2020254031A1 (en) * 2019-06-19 2020-12-24 Sony Corporation System and method for passive reflection of rf signals
CN111983560B (en) * 2020-08-05 2022-12-30 北京理工大学 Dual-reconfigurable intelligent surface-assisted millimeter wave single base station positioning method

Also Published As

Publication number Publication date
CN114726421A (en) 2022-07-08
WO2022148380A1 (en) 2022-07-14

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