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    Channel state information feedback and acquisition method and device
    11.
    发明授权
    Channel state information feedback and acquisition method and device 有权

    公开(公告)号：US10305569B2

    公开(公告)日：2019-05-28

    申请号：US15563464

    申请日：2016-02-03

    Applicant: China Academy of Telecommunications Technology

    Inventor： Hui Li ,  Qiubin Gao ,  Runhua Chen ,  Tamrakar Rakesh ,  Wenhong Chen

    IPC: H04B7/06 ,  H04W24/10 ,  H04L1/00 ,  H04B7/0456

    Abstract: Disclosed are a channel state information feedback and acquisition method and device. The application comprises: acquiring, by a terminal, a first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources and a first corresponding relationship of the above configured by a network device; measuring, by the terminal and according to the first-dimension downlink reference signal resource, a first-dimension downlink reference signal, and selecting, by the terminal and according to the measured first-dimension PMI and the first corresponding relationship, a resource for measuring a second-dimension downlink reference signal, measuring, according to the resource, the second-dimension downlink reference signal, and feeding back channel state information, wherein the second-dimension reference signal is transmitted after forming a first-dimension beamforming weight. The present application enables acquisition of channel state information between a network device and a terminal, and adjustment of the first-dimension beamforming weight for forming the second-dimension reference signal according to the PMI fed back by the first-dimension.

    Method for controlling feedback of channel state information, and device for feeding back channel state information
    12.
    发明授权
    Method for controlling feedback of channel state information, and device for feeding back channel state information 有权

    公开(公告)号：US11038574B2

    公开(公告)日：2021-06-15

    申请号：US15579122

    申请日：2016-05-23

    Applicant: China Academy of Telecommunications Technology

    Inventor： Runhua Chen ,  Qiubin Gao ,  Tamrakar Rakesh

    IPC: H04B7/06 ,  H04W88/02 ,  H04W24/10 ,  H04W72/04

    Abstract: Disclosed are a channel state information feedback and a control method and device therefor, which are used for realizing large-scale CSI feedback under an antenna system, wherein a UE may only need to feedback some pieces of PMI information, so that the complexity of the UE feeding back CSI is reduced, and the flexibility for a network side to control the UE to feed back the CSI is better. The channel state information (CSI) feedback control method provided in the present application comprises: a base station determining that there is a need to control a user equipment (UE) to feed back CSI, the CSI at least comprising a first precoding matrix indicator (PMI) and a second PMI, the first PMI and the second PMI corresponding to the same precoding matrix; and the base station sending trigger signaling of CSI feedback to the UE, wherein indication information used for instructing whether the UE feeds back the first PMI and/or the second PMI is comprised.

    Beam scanning method and related device
    13.
    发明授权
    Beam scanning method and related device 有权

    公开(公告)号：US10892805B2

    公开(公告)日：2021-01-12

    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 ,  H04B7/0408 ,  H04B7/06 ,  H04L5/00 ,  H04W72/04

    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
    14.
    发明授权
    CSI feedback method, precoding method, and apparatus 有权

    公开(公告)号：US10742292B2

    公开(公告)日：2020-08-11

    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: H04W4/00 ,  H04B7/06 ,  H04B7/0456 ,  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.

    Method and device for information indication and resource determination and computer storage medium
    17.
    发明授权
    Method and device for information indication and resource determination and computer storage medium 有权

    公开(公告)号：US11310014B2

    公开(公告)日：2022-04-19

    申请号：US16764851

    申请日：2018-10-19

    Applicant: China Academy of Telecommunications Technology

    Inventor： Baojuan Guo ,  Tamrakar Rakesh

    IPC: H04L5/00 ,  H04L27/26

    Abstract: Disclosed are a method and a device for information indication and resource determination, and a computer storage medium, which are used to indicate and determine the resource occupation state of a DMRS port, and to save a signaling overhead. The information indication method provided in an embodiment of the present application comprises: determining indication information on a demodulation reference signal (DMRS) port resource that a terminal needs to occupy, according to a preset configuration list, wherein the configuration list comprises DMRS group information and DMRS port information; and notifying the terminal of the indication information.

    CSI information reporting and receiving method and communication device
    18.
    发明授权
    CSI information reporting and receiving method and communication device 有权

    公开(公告)号：US11218277B2

    公开(公告)日：2022-01-04

    申请号：US16645524

    申请日：2018-06-28

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Hui Li ,  Qiubin Gao ,  Tamrakar Rakesh ,  Runhua Chen ,  Xin Su ,  Deshan Miao ,  Qiuping Huang ,  Mengjun Wang

    IPC: H04L5/00

    Abstract: Provided in the embodiments of the present application are a channel state indication (CSI) information reporting and receiving method and a communication device, which are used to provide for a terminal in an NR system a solution for mapping CSI information to an uplink channel and transmitting the same. The method comprises: a terminal receives an uplink channel resource configuration signaling and/or a demodulation reference signal (DMRS) configuration signaling sent by a base station, and determines a mapping symbol set, wherein the DMRS configuration signaling is used to indicate the number of DMRSes configured by a system for an uplink channel and the time-frequency location of an occupied OFDM symbol, the uplink channel resource configuration signaling represents the time-frequency resource of the uplink channel, and the mapping symbol set is a set of symbols adjacent to the OFDM symbol; and the terminal measures a downlink channel, calculates CSI information, encodes the CSI information, and maps an information part comprising rank indication (RI) information onto an RE of at least one orthogonal frequency-division multiplexing (OFDM) symbol in the mapping symbol set to carry out transmission.

    Antenna beam management method and related device
    19.
    发明授权
    Antenna beam management method and related device 有权

    公开(公告)号：US10804994B2

    公开(公告)日：2020-10-13

    申请号：US16337961

    申请日：2017-07-31

    Applicant: China Academy of Telecommunications Technology

    Inventor： Qiubin Gao ,  Runhua Chen ,  Tamrakar Rakesh ,  Xin Su ,  Chuanjun Li

    IPC: H04B7/06 ,  H04B7/0417 ,  H04B7/08 ,  H04W16/28 ,  H04W72/04

    Abstract: Disclosed in the present application are an antenna beam management method and related device, used for solving the problem in current large-scale antenna technology wherein the overhead of beam management control signaling is large. The method is: a terminal sending related information of a downlink beam of the terminal to a base station so that the base station determines a first downlink sending beam on the basis of the related information of the downlink beam; the terminal receiving notification information related to the first downlink sending beam send by the base station, the notification information comprising indication information that is used by the terminal to determine at least one first downlink receiving beam; the terminal determining the at least one first downlink receiving beam on the basis of the notification information; and the terminal receiving a downlink signal on the basis of the at least one first downlink receiving beam.

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