公开(公告)号：US20210029733A1

公开(公告)日：2021-01-28

申请号：US16982218

申请日：2018-03-22

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Huiling Li ,  Lihui Wang ,  Chongning Na ,  Xin Wang ,  Xiaolin Hou

IPC: H04W72/12

Abstract: To appropriately control UL transmission such as a CSI reporting when performing communication by applying a different configuration from those of legacy LTE systems, a user terminal according to one aspect of the present disclosure includes: a transmission section that transmits one or more UL signals by using an uplink shared channel based on an instruction from a base station; and a control section that controls the transmission assuming that transmission durations of a plurality of UL signals do not overlap in a same symbol, or, when at least part of the transmission durations of the plurality of UL signals overlap in the same symbol, performs control to select and transmit the part of the UL signals.

公开(公告)号：US20200322842A1

公开(公告)日：2020-10-08

申请号：US16906113

申请日：2020-06-19

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Xiaolin Hou ,  Huiling Jiang ,  Xin Wang

IPC: H04W28/06 ,  H04W72/04 ,  H04L1/16 ,  H04L5/00 ,  H04L5/14

Abstract: A terminal is disclosed that includes a receiver that performs, using a first time interval or a second time interval, a receiving process for downlink control information indicating a transmission direction per given time interval and a processor that determines the transmission direction based on the downlink control information. In other aspects, a radio communication method is also disclosed.

公开(公告)号：US12191960B2

公开(公告)日：2025-01-07

申请号：US18011447

申请日：2021-04-09

Applicant: NTT DOCOMO, INC.

Inventor： Xin Wang ,  Xiaolin Hou ,  Anxin Li ,  Lan Chen

IPC: H04L1/02 ,  H04B7/0417 ,  H04B7/06

Abstract: The present invention provides a terminal and a base station in a wireless communication system, and methods executed by the terminal and the base station. The terminal comprises: a processing unit, configured to perform characteristic domain transformation on a channel matrix to obtain a transformed channel characteristic and compress the transformed channel characteristic to obtain a compressed channel characteristic; and a transmitting unit, configured to transmit the compressed channel characteristic, as feedback information, to the base station.

公开(公告)号：US11758558B2

公开(公告)日：2023-09-12

申请号：US17533756

申请日：2021-11-23

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: H04W72/23 ,  H04W72/0446 ,  H04W72/53

CPC classification number: H04W72/23 ,  H04W72/0446 ,  H04W72/53

Abstract: An apparatus is disclosed including a receiver that receives a downlink control information and a downlink shared channel that is scheduled by the downlink control information; 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; and an output apparatus that outputs information based on the downlink shared channel, wherein the first timing is defined based on a numerology of the downlink shared channel. In other aspects, a system is also disclosed.

公开(公告)号：US11757586B2

公开(公告)日：2023-09-12

申请号：US17267372

申请日：2018-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Jing Wang ,  Xiaolin Hou ,  Xin Wang ,  Yuki Matsumura ,  Satoshi Nagata

IPC: H04B17/24 ,  H04B17/318 ,  H04L1/00 ,  H04L5/00 ,  H04B17/382

CPC classification number: H04L5/0048 ,  H04B17/24 ,  H04B17/318 ,  H04L1/0081 ,  H04B17/382

Abstract: Embodiments of the present invention provide a wireless communication method, a user equipment and a base station. The wireless communication method performed by the user equipment includes: receiving reference signal configuration information transmitted by a base station by using at least one reference signal group, the reference signal configuration information including an identification of at least one reference signal group and measurement configuration information of at least one reference signal group; and feeding back feedback information about channel quality according to the reference signal configuration information.

公开(公告)号：US20230261905A1

公开(公告)日：2023-08-17

申请号：US18002416

申请日：2021-04-09

Applicant: NTT DOCOMO, INC.

Inventor： Xin Wang ,  Xiaolin Hou ,  Anxin Li ,  Lan Chen ,  Tong Chen ,  Jiajia Guo ,  Shi Jin

IPC: H04L25/02 ,  H04L1/00

CPC classification number: H04L25/0224 ,  H04L1/0026

Abstract: A user equipment, a base station, a joint training device for a user equipment and a base station, a joint channel estimation and feedback system for a user equipment and a base station, a feedback channel state information generation method, a channel matrix generation method, a joint training method, and a joint channel estimation and feedback method for a user equipment and a base station in wireless communication. Feedback channel state information is generated by a user equipment according to an actual pilot signal, and a deeper residual learning neural network is introduced into a base station to reconstruct a channel matrix of the base station according to the feedback channel state information. As such, it is possible that the base station can reconstruct a complete high-resolution channel matrix even if an actually received pilot signal is an incomplete low-resolution part.

公开(公告)号：US11706006B2

公开(公告)日：2023-07-18

申请号：US16474701

申请日：2017-11-30

Applicant: NTT DOCOMO, INC.

Inventor： Yousuke Sano ,  Kazuki Takeda ,  Satoshi Nagata ,  Shaozhen Guo ,  Xin Wang ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W72/0446 ,  H04W72/20 ,  H04W72/04 ,  H04L5/00 ,  H04L5/10

CPC classification number: H04L5/0051 ,  H04L5/10 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/20

Abstract: A user equipment apparatus in a radio communication system in which uplink communication and downlink communication are dynamically changed includes a reception unit configured to receive, from a base station, control information indicating a resource for an uplink demodulation reference signal in a subframe used for transmitting uplink data; and a transmitting unit configured to transmit the uplink demodulation reference signal according to the control information; wherein the resource for the uplink demodulation reference signal is multiplexed into a part of resources corresponding to one or more symbols at a beginning of a data segment in the subframe used for transmitting the uplink data.

公开(公告)号：US11510213B2

公开(公告)日：2022-11-22

申请号：US17047934

申请日：2018-05-29

Applicant: NTT DOCOMO, INC.

Inventor： Xin Wang ,  Min Liu ,  Jing Wang ,  Xiaolin Hou

IPC: H04W72/08 ,  H04B7/0452 ,  H04L5/00

Abstract: Provided by the present disclosure are a method used for signal transmission, and corresponding user terminals and base stations. The method performed by a user terminal includes: receiving indication information for a spatial-domain reception parameter transmitted by a base station; determining a first spatial-domain reception parameter according to the indication information for a spatial-domain reception parameter, so that the user terminal receives downlink data signals through the first spatial domain reception parameter. The method performed by a base station includes: generating indication information for a spatial-domain reception parameter; and transmitting the indication information for a spatial-domain reception parameter to a user terminal, so that the user terminal determines a first spatial-domain reception parameter according to the indication information for a spatial-domain reception parameter.

公开(公告)号：US20220338231A1

公开(公告)日：2022-10-20

申请号：US17633042

申请日：2019-08-09

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Juan Liu ,  Wenjia Liu ,  Shaozhen Guo ,  Jing Wang ,  Xin Wang ,  Xiaolin Hou

IPC: H04W72/12 ,  H04L27/26

Abstract: A terminal is disclosed including a receiving unit that receives a signal that is encoded by using transform precoding; and a controlling unit that assumes that size of transform precoding is determined based on a bandwidth of a downlink.

公开(公告)号：US11425734B2

公开(公告)日：2022-08-23

申请号：US16636576

申请日：2017-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Shinpei Yasukawa ,  Satoshi Nagata ,  Shaozhen Guo ,  Xin Wang ,  Chongning Na ,  Xiaolin Hou

IPC: H04W72/10 ,  H04L5/00 ,  H04W24/10

Abstract: A user equipment in a wireless communication system includes a configuration information management unit configured to retain configuration information for transmitting a reference signal used for measuring interference in other user equipments, and a signal transmitter configured to transmit the reference signal based on the configuration information. When transmission of the reference signal contends with transmission or reception of another signal, the signal transmitter determines whether the reference signal is to be transmitted or not based on a predetermined priority level.