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    BEAM SCANNING METHOD AND RELATED DEVICE
    31.
    发明申请
    BEAM SCANNING METHOD AND RELATED DEVICE 审中-公开

    公开(公告)号：US20200028549A1

    公开(公告)日：2020-01-23

    申请号：US16338322

    申请日：2017-07-25

    Applicant: China Academy of Telecommunications Technology

    Inventor： Xin SU ,  Qiubin GAO ,  Runhua CHEN ,  Tamrakar RAKESH ,  Chuanjun LI ,  Mengjun WANG ,  Hui LI ,  Qiuping HUANG

    IPC: H04B7/0452 ,  H04W72/04 ,  H04B7/0408 ,  H04B7/06 ,  H04L5/00

    Abstract: Disclosed are a beam scanning method and a related device, used for solving the problem that, during the existing process of determining the optimal transceiving beam by performing traversal search on a combination of potential transceiving beams, a large amount of system overhead needs to be occupied, thus reducing the system efficiency and the adaptability to a time-varying channel. The method comprises: a first communication node determines at least one transmitted beam according to the optimal receiving beam group between a receiver of the first communication node and a transmitter of a second communication node; the first communication node sequentially sends a signal to the second communication node by means of the transmitter according to the determined at least one transmitted beam until the optimal transmitted beam is determined.

    CSI FEEDBACK METHOD, PRECODING METHOD, AND APPARATUS
    35.
    发明申请
    CSI FEEDBACK METHOD, PRECODING METHOD, AND APPARATUS 审中-公开

    公开(公告)号：US20190074884A1

    公开(公告)日：2019-03-07

    申请号：US16084218

    申请日：2017-02-24

    Applicant: China Academy of Telecommunications Technology

    Inventor： Wenhong CHEN ,  Qiubin GAO ,  Hui LI ,  Runhua CHEN ,  Tamrakar RAKESH

    IPC: H04B7/06 ,  H04W72/04 ,  H04B7/0456

    CPC classification number: H04B7/0626 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0632 ,  H04B7/0639 ,  H04W72/04

    Abstract: Disclosed are a channel state information (CSI) feedback method, a precoding method, and an apparatus. In the present invention, a terminal obtains, according to the number of downlink transport layers, a first precoding matrix set that is located on a first subband and that is corresponding to the number of the downlink transport layers, the first precoding matrix set comprising one or more precoding matrices, and a physical resource in the first subband being corresponding to a precoding matrix in the first precoding matrix set; the terminal determines a channel quality indicator (CQI) on a second subband according to downlink channel information and the first precoding matrix set on the first subband; and the terminal feeds back the CSI, the CSI comprising one or more of the following information: an RI used for indicating the number of the downlink transport layers, a PMI used for indicating the first precoding matrix set on the first subband and the CQI on the second subband. The technical solution disclosed in the resent invention can reduce signaling overheads of feeding back CSI by a terminal.

    REFERENCE SIGNAL MAPPING METHOD AND DEVICE
    36.
    发明申请
    REFERENCE SIGNAL MAPPING METHOD AND DEVICE 审中-公开

    公开(公告)号：US20180227095A1

    公开(公告)日：2018-08-09

    申请号：US15747753

    申请日：2016-06-20

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Rakesh TAMRAKAR ,  Qiubin GAO ,  Runhua CHEN ,  Wenhong CHEN ,  Hui LI

    IPC: H04L5/00

    Abstract: A reference signal mapping method and a reference signal mapping device are provided. The reference signal mapping method includes steps of: determining a position of a RE to which a CSI-RS has been mapped in accordance with an N-port reference signal pattern, N being equal to 12 or 16; and performing a resource mapping operation on the CSI-RS in accordance with the determined position of the RE. The position of the RE to which the CSI-RS has been mapped in the N-port reference signal pattern being determined in accordance with a position of the RE to which the CSI-RS has been mapped in one or more of a 2-port reference signal pattern, a 4-port reference signal pattern and an 8-port reference signal pattern. As a result, it is able to achieve the 12-port or 16-port CSI-RS mapping, thereby to achieve the 12-port or 16-port CSI-RS transmission.

    CHANNEL STATE INFORMATION FEEDBACK AND RECEIVING METHOD AND DEVICE
    37.
    发明申请
    CHANNEL STATE INFORMATION FEEDBACK AND RECEIVING METHOD AND DEVICE 审中-公开

    公开(公告)号：US20180227030A1

    公开(公告)日：2018-08-09

    申请号：US15749122

    申请日：2016-07-21

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Wenhong CHEN ,  Shanzhi CHEN ,  Qiubin GAO ,  Runhua CHEN ,  Tamrakar RAKESH ,  Hui LI

    IPC: H04B7/06 ,  H04L5/00

    CPC classification number: H04B7/0626 ,  H04B7/0639 ,  H04B7/0645 ,  H04L1/00 ,  H04L1/0026 ,  H04L1/0027 ,  H04L5/0057

    Abstract: The present application provides a channel state information (CSI) feedback and receiving method and device. The CSI feedback method by a UE comprises: determining, according to an indication of a base station, at least one CSI feedback configuration group configured by the base station, wherein each CSI feedback configuration group comprises at least one CSI feedback configuration; and upon determination of a need to report CSI, reporting, via a PUCCH or PUSCH, to the base station CSI acquired based on a first CSI feedback configuration, wherein the first CSI feedback configuration is a CSI feedback configuration determined, according to location information of a CSI feedback configuration in the most recent report or location information of a CSI feedback configuration indicated by the base station, from a corresponding CSI feedback configuration group by the UE. The present application supports independent reporting of location information and corresponding CSI, thus improving the detection performance of such information, and further supports a base station to acquire CSI corresponding to a specified CSI feedback configuration, thus enabling more flexible downlink scheduling and transmission.

    METHOD, APPARATUS, AND ELECTRONIC DEVICE OF DETERMINING BEAM RECIPROCITY OF A DEVICE
    40.
    发明申请
    METHOD, APPARATUS, AND ELECTRONIC DEVICE OF DETERMINING BEAM RECIPROCITY OF A DEVICE 审中-公开

    公开(公告)号：US20200287604A1

    公开(公告)日：2020-09-10

    申请号：US16494989

    申请日：2018-03-08

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Qiubin GAO ,  Rakesh TAMRAKAR ,  Xin SU ,  Qiuping HUANG ,  Hui LI

    IPC: H04B7/06 ,  H04B7/08

    Abstract: A method, an apparatus, and an electronic device of determining beam reciprocity of a device, and a computer readable storage medium are provided. The method includes: instructing a second device to transmit, by using a transmission beam obtained based on beam reciprocity, a reference signal; receiving the reference signal transmitted by the second device, and calculating a reception quality of the reference signal; receiving a plurality of beam training signals transmitted by the second device, and calculating reception qualities of the plurality of beam training signals, respectively; comparing the reception quality of the reference signal with a reference reception quality obtained based on the reception qualities of the plurality of beam training signals, and determining, based on a result of the comparison, whether the beam reciprocity of the second device is established or not.

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