公开(公告)号：US20230163915A1

公开(公告)日：2023-05-25

申请号：US17920521

申请日：2020-04-22

Applicant: NTT DOCOMO, INC.

Inventor： Naoya Shibaike ,  Hiroki Harada ,  Satoshi Nagata ,  Xin Wang ,  Jing Wang ,  Xiaolin Hou

IPC: H04L5/00 ,  H04L27/26 ,  H04J13/00

CPC classification number: H04L5/0051 ,  H04J13/0062 ,  H04L27/26025

Abstract: A terminal receives a demodulation reference signal from a network. The terminal assumes the demodulation reference signal to be more aggregated in a frequency direction than in a case where a frequency band including one or a plurality of frequency ranges is used, when a different frequency band differing from the frequency band is used or when a wider subcarrier spacing is applied than the case where the frequency band is used.

公开(公告)号：US11552762B2

公开(公告)日：2023-01-10

申请号：US17257181

申请日：2018-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Juan Liu ,  Wenjia Liu ,  Runxin Wang ,  Xin Wang ,  Xiaolin Hou

IPC: H04L5/00 ,  H04W72/04 ,  H04L12/54

Abstract: Disclosed are a resource allocation method for demodulation reference signals and a base station. The resource allocation method for demodulation reference signals executed by the base station includes: determining an allocation method for a resource required for transmitting a plurality of demodulation reference signals and a parameter for generating the plurality of demodulation reference signals, the plurality of demodulation reference signals respectively corresponding to a plurality of user equipments, the allocation method being capable of supporting transmission of the plurality of demodulation reference signals on the same time domain resource, and the parameter being capable of making the demodulation reference signals sent with the same time frequency resource distinguished from each other; and transmitting information indicating the allocation method and information indicating the parameter to the plurality of user equipments.

公开(公告)号：US11212794B2

公开(公告)日：2021-12-28

申请号：US16403973

申请日：2019-05-06

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Kazuki Takeda ,  Satoshi Nagata ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W88/08 ,  H04W88/02 ,  H04W72/04 ,  H04W16/28 ,  H04L5/22 ,  H04L5/00 ,  H04L25/02 ,  H04B7/06 ,  H04B7/0456 ,  H04B7/0404

Abstract: In one aspect, a user equipment is disclosed including a control unit configured to precode an uplink reference signal based on a downlink reference signal, and a transmission unit configured to transmit the precoded uplink reference signal. In another aspect, a transmission method is disclosed including precoding an uplink reference signal based on a downlink reference signal, and transmitting the precoded uplink reference signal.

公开(公告)号：US20210314062A1

公开(公告)日：2021-10-07

申请号：US17266739

申请日：2018-08-09

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Yuki Matsumura ,  Xin Wang

IPC: H04B7/26

Abstract: A user terminal according to one aspect of the present disclosure includes a receiving section that receives an instruction to transmit a reference signal for forming spherical coverage, and a transmitting section that transmits the reference signal, forming the spherical coverage, based on the transmission instruction. According to one aspect of the present disclosure, the formation of spherical coverage can be properly controlled.

公开(公告)号：US11129038B2

公开(公告)日：2021-09-21

申请号：US16607116

申请日：2018-05-03

Applicant: NTT DOCOMO, INC.

Inventor： Min Liu ,  Xin Wang ,  Chongning Na ,  Yuichi Kakishima ,  Satoshi Nagata

IPC: H04W4/00 ,  H04W24/08 ,  H04B7/06 ,  H04L5/00 ,  H04W72/12 ,  H04W72/14

Abstract: A hybrid channel quality measurement method is presented. The method includes: performing a first channel measurement according to Channel State Information Reference Signals (CSI-RSs), and transmitting a first channel measurement feedback to a base station according to a first channel measurement result; determining whether to perform a second channel measurement feedback based on Demodulation Reference Signals (DMRSs) after the first channel measurement feedback is performed; and performing a second channel measurement according to the DMRSs when determining to perform the second channel measurement feedback, and transmitting the second channel measurement feedback to the base station according to a second channel measurement result.

公开(公告)号：US11128396B2

公开(公告)日：2021-09-21

申请号：US16470918

申请日：2018-01-05

Applicant: NTT DOCOMO, INC.

Inventor： Xin Wang ,  Xiaolin Hou ,  Chongning Na ,  Huiling Jiang ,  Yuichi Kakishima ,  Kazuaki Takeda ,  Satoshi Nagata

IPC: H04W4/00 ,  H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04W72/04

Abstract: Provided are a user terminal, a feedback method at the user terminal, a base station and a method at the base station. The feedback method at the user terminal includes steps of: calculating first information related to receiving signal quality; combining the first information and a response signal to a hybrid automatic repeat request (HARQ) to be transmitted to a base station to generate a combined signal; carrying out signal processing on the combined signal to generate second information; and transmitting the second information to the base station.

公开(公告)号：US20210120574A1

公开(公告)日：2021-04-22

申请号：US16494426

申请日：2017-03-17

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Chongning Na ,  Xin Wang ,  Jing Wang ,  Lihui Wang ,  Min Liu ,  Huiling Jiang

IPC: H04W72/12 ,  H04W72/04

Abstract: A terminal is disclosed including a receiver that receives a downlink control information and a downlink shared channel that is scheduled by the downlink control information. The terminal also includes a processor that determines an allocation of the downlink shared channel in a time domain based on a first timing indicated by a first time unit and a second timing indicated by a second time unit that are obtained from information notified by the downlink control information. In other aspects, a radio communication method is also disclosed.

公开(公告)号：US20210120557A1

公开(公告)日：2021-04-22

申请号：US16494440

申请日：2017-03-17

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Chongning Na ,  Xin Wang ,  Jing Wang ,  Lihui Wang ,  Min Liu ,  Huiling Jiang

IPC: H04W72/04 ,  H04W24/08 ,  H04W72/12 ,  H04L5/00 ,  H04L1/18

Abstract: The present invention is designed to appropriately select PUCCH resources used to transmit HARQ-ACK. According to one aspect of the present invention, a user terminal has a control section that monitors candidate resources of one or more downlink (DL) control channels (DL) transmitted in multiple different time and/or frequency resources, and detects one or more downlink control information (DCI), and a transmission section that transmits delivery acknowledgment information in response to a downlink (DL) data channel by using an uplink (UL) control channel, and the control section selects resources for the UL control channel based on the DCI.

公开(公告)号：US20190281602A1

公开(公告)日：2019-09-12

申请号：US16403973

申请日：2019-05-06

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Kazuki Takeda ,  Satoshi Nagata ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/04 ,  H04L25/02 ,  H04B7/06 ,  H04L5/00 ,  H04L5/22 ,  H04W16/28

Abstract: In one aspect, a user equipment is disclosed including a control unit configured to precode an uplink reference signal based on a downlink reference signal, and a transmission unit configured to transmit the precoded uplink reference signal. In another aspect, a transmission method is disclosed including precoding an uplink reference signal based on a downlink reference signal, and transmitting the precoded uplink reference signal.

公开(公告)号：US20180110059A1

公开(公告)日：2018-04-19

申请号：US15567638

申请日：2016-08-08

Applicant: NTT DOCOMO, INC.

Inventor： Satoshi Nagata ,  Yuichi Kakishima ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/12

CPC classification number: H04W72/121 ,  H04B7/0452 ,  H04W72/1289

Abstract: According to an aspect of the present invention, there is provided a radio resource scheduling method, wherein the method includes generating format information, wherein the format information specifies a format of resource allocation information, the format corresponding to a number of a plurality of mobile stations that simultaneously perform communication with the radio base station; generating the resource allocation information provided with the format specified by the format information corresponding to radio resources allocated to the plurality of mobile stations; and transmitting, to the plurality of mobile stations, the resource allocation information.