公开(公告)号：US20200028553A1

公开(公告)日：2020-01-23

申请号：US16335660

申请日：2017-09-12

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Runhua CHEN ,  Qiuping HUANG ,  Qiubin GAO ,  Rakesh TAMRAKAR

IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/0417 ,  H04L27/26

Abstract: A signal transmission method and device are provided. The method includes: determining a codebook C being a set of matrices W; determining a matrix set Ω={W}∈C from the codebook C; generating one or more layers of signals, beamforming the signals with matrixes in the matrix set Ω, and cyclically mapping the matrixes in the matrix set Ω to different locations of transmission resources; and transmitting the beamformed signals at the different locations of the transmission resources.

公开(公告)号：US20190149297A1

公开(公告)日：2019-05-16

申请号：US15759513

申请日：2016-06-14

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Rakesh TAMRAKAR

IPC: H04L5/00 ,  H04W72/04

Abstract: The present disclosure provides in some embodiments pilot signal configuration methods and pilot signal configuration devices. The pilot signal configuration method includes steps of: determining configuration information about a pilot signal to be transmitted within a special downlink subframe for a UE; and transmitting the configuration information to the UE. According to some embodiments of the present disclosure, it is able to achieve the configuration of the pilot signal to be transmitted within the special downlink subframe.

公开(公告)号：US20170338878A1

公开(公告)日：2017-11-23

申请号：US15527311

申请日：2015-09-28

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

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

IPC: H04B7/06 ,  H04W24/10 ,  H04L5/00 ,  H04W72/08

CPC classification number: H04B7/0626 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/0621 ,  H04B7/0639 ,  H04B17/318 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/06 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0057 ,  H04L5/0058 ,  H04L5/006 ,  H04L5/0073 ,  H04L25/021 ,  H04W24/10 ,  H04W72/082

Abstract: A CSI measurement method, a CSI acquisition method, a terminal and a network device are provided, to measure CSI. The terminal performs interference measurement to acquire initial interference measurement result, determine the CSI based on the initial interference measurement result and an interference measurement parameter configured by the network device, and then report the determined CSI to the network device. The interference measurement parameter is configured by the network device, so the interference measurement parameter configured by the network device is capable of reflecting an actual situation of interference information, and interference information acquired by the terminal based on the interference measurement parameter matches interference information for actual transmission in a better manner. As a result, it is able to improve a matching degree between the interference information acquired by the terminal and the interference information for the actual transmission, thereby to enable a network to select a more appropriate parameter for link adaptation.

公开(公告)号：US20210120536A1

公开(公告)日：2021-04-22

申请号：US16494647

申请日：2018-02-26

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Qiubin GAO ,  Rakesh TAMRAKAR ,  Xin SU ,  Runhua CHEN

IPC: H04W72/04 ,  H04W72/12

Abstract: A method and an apparatus for determining an uplink transmission beam are provided. The method includes: a base station transmitting uplink transmission beam indication information to a terminal; where the uplink transmission beam indication information includes beam type indication information, the beam type indication information is used to indicate that the uplink transmission beam for the terminal is obtained based on uplink reference signals, or the beam type indication information is used to indicate that the uplink transmission beam for the terminal is obtained based on downlink reference signals, so as to ensure that the base station is capable of selecting an uplink transmission beam for the terminal.

公开(公告)号：US20210045140A1

公开(公告)日：2021-02-11

申请号：US16969151

申请日：2019-02-12

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Qiuping HUANG ,  Runhua CHEN ,  Qiubin GAO ,  Rakesh TAMRAKAR

IPC: H04W72/12

Abstract: A data transmission method and a data transmission device are provided. The method includes: receiving first indication information sent by a network side device, the first indication information is used to instruct the UE to send a first signal; and determining actual first uplink transmission characteristic of the first signal when valid first uplink transmission characteristic of the first signal is not obtained, and sending the first signal through the actual first uplink transmission characteristic, or not sending the first signal when valid first uplink transmission characteristic of the first signal is not obtained.

公开(公告)号：US20200036421A1

公开(公告)日：2020-01-30

申请号：US16337373

申请日：2017-09-13

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

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

IPC: H04B7/06 ,  H04B7/0452 ,  H04B7/08 ,  H04W16/28 ,  H04L5/00

Abstract: A beam scanning and search tracking method and device are provided. The method includes constructing analog beams and performing digital beam-forming to the analog beams so as to form equivalent beams; transmitting reference signals to a second communication node by using the equivalent beams; receiving beam information about the equivalent beams and corresponding channel state information fed back by the second communication node according to the reference signals; performing a beam scanning operation and a search tracking operation by using the beam information and the channel state information.

公开(公告)号：US20190312697A1

公开(公告)日：2019-10-10

申请号：US16349014

申请日：2017-12-28

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

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

IPC: H04L5/00 ,  H04B7/0456

Abstract: The present disclosure provides a reference signal transmission method, a transmitter and a receiver. The reference signal transmission method includes: precoding, by a transmitter, a data stream for user data through a second precoding matrix so as to acquire D virtual data streams; precoding, by the transmitter, the D virtual data streams through a first precoding matrix, and transmitting the D precoded virtual data streams to a receiver via T antenna groups, each antenna group including one or more antenna units or antenna ports having a same phase noise; transmitting, by the transmitter, D demodulation reference signals to the receiver; and transmitting, by the transmitter, M phase-tracking reference signals to the receiver, the M phase-tracking reference signals being adopted to track phase changes in the T antenna groups caused by one or more phase noise sources.

公开(公告)号：US20180309556A1

公开(公告)日：2018-10-25

申请号：US15770156

申请日：2016-09-12

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Wenhong CHEN ,  Xueming PAN ,  Qiubin GAO ,  Rakesh TAMRAKAR

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

Abstract: A method and a device for determining a CSI-RS transmission resource are provided. The method includes: acquiring, by a UE, uplink/downlink subframe configuration information for determining a position of a CSI-RS resource; determining, by the UE, a type of a subframe within which the CSI-RS is to be transmitted in accordance with the uplink/downlink subframe configuration information; and determining, by the UE, the position of the CSI-RS resource within the subframe within which the CSI-RS is to be transmitted in accordance with the determined type of the subframe.

公开(公告)号：US20180241449A1

公开(公告)日：2018-08-23

申请号：US15751460

申请日：2016-08-08

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

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

IPC: H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0486 ,  H04B7/0473 ,  H04B7/0478 ,  H04B7/0617 ,  H04B7/0639

Abstract: A precoding matrix determination method and a precoding matrix determination device are provided. The precoding matrix determination method includes: dividing each of the groups of vertical-dimension beams into a plurality of subgroups of vertical-dimension beams, and dividing each of the groups of horizontal-dimension beams into a plurality of subgroups of horizontal-dimension beams; determining a first stage codebook in accordance with a Kronecker product of each subgroup of vertical-dimension beams acquired by dividing each of the groups of vertical-dimension beams and each subgroup of horizontal-dimension beams acquired by dividing each of the groups of horizontal-dimension beams; and selecting a plurality of columns of beams from the determined first stage codebook using a second stage codebook, and performing phase adjustment to determine a precoding matrix.

公开(公告)号：US20170373772A1

公开(公告)日：2017-12-28

申请号：US15539981

申请日：2015-12-09

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

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

IPC: H04B17/318 ,  H04L25/02 ,  H04B7/0452

Abstract: The present disclosure provides a cell measurement method and a terminal. The cell measurement method includes steps of: measuring a pilot signal from a to-be-measured cell, so as to acquire an channel estimation of N pilot signal transmission ports of the to-be-measured cell, N≧1; determining an equivalent received power corresponding to each precoding matrix in accordance with each precoding matrix in a set of precoding matrices and the channel estimation of the N pilot signal transmission ports of the to-be-measured cell; and determining an equivalent received power of the to-be-measured cell in accordance with the equivalent received power corresponding to each precoding matrix.