公开(公告)号：US12082083B2

公开(公告)日：2024-09-03

申请号：US17265365

申请日：2018-08-09

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Huan Wang ,  Xiaolin Hou

IPC: H04W4/40 ,  H04W72/044 ,  H04W72/30 ,  H04W76/11

CPC classification number: H04W4/40 ,  H04W72/0466 ,  H04W72/30 ,  H04W76/11

Abstract: A user equipment includes a reception unit that receives control information and data through inter-terminal direct communication; and a control unit that determines, based on the control information or the data, whether the inter-terminal direct communication is unicast, groupcast, or broadcast.

公开(公告)号：US11881968B2

公开(公告)日：2024-01-23

申请号：US16958510

申请日：2017-12-27

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Yuichi Kakishima

IPC: H04L25/02 ,  H04B7/0456 ,  H04L5/00

CPC classification number: H04L25/0226 ,  H04B7/0482 ,  H04L5/0051

Abstract: A user terminal according to one aspect of the present disclosure includes: a transmitting section that transmits an uplink shared channel by applying a precoder; and a control section that specifies a number of ports used to determine the precoder when a Sounding Reference Signal (SRS) resource is not configured. According to one aspect of the present disclosure, even when an SRS resource is not configured, it is possible to appropriately determine a precoder of a UL signal.

公开(公告)号：US11515923B2

公开(公告)日：2022-11-29

申请号：US17266825

申请日：2018-08-09

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Yuki Matsumura ,  Ryosuke Osawa ,  Satoshi Nagata

IPC: H04B7/06 ,  H04B7/0404 ,  H04B7/0456 ,  H04W16/28

Abstract: A user terminal includes: a transmission section including a plurality of antennas; and a control section that controls the phase of a signal transmitted from the plurality of antennas to a base station. The control section performs control such that any one of first information and second information is notified to the base station, the first information is information indicating any of a plurality of array patterns that are adoptable by each antenna in a case where the plurality of antennas are all coherent, and the second information is information indicating the number of the coherent antennas in a case where at least two of the plurality of antennas are coherent.

公开(公告)号：US20210297830A1

公开(公告)日：2021-09-23

申请号：US17265365

申请日：2018-08-09

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Huan Wang ,  Xiaolin Hou

IPC: H04W4/40 ,  H04W72/00 ,  H04W76/11 ,  H04W72/04

Abstract: A user equipment includes a reception unit that receives control information and data through inter-terminal direct communication; and a control unit that determines, based on the control information or the data, whether the inter-terminal direct communication is unicast, groupcast, or broadcast.

公开(公告)号：US11121837B2

公开(公告)日：2021-09-14

申请号：US16483314

申请日：2018-02-02

Applicant: NTT DOCOMO, INC. ,  DOCOMO Innovations, Inc.

Inventor： Yuichi Kakishima ,  Ryosuke Osawa ,  Kazuaki Takeda ,  Satoshi Nagata

IPC: H04L5/00 ,  H04B7/0417 ,  H04B7/06

Abstract: A user equipment (UE) is disclosed including a receiver that receives Sounding Reference Symbol (SRS) configuration information that indicates a first resource used for transmission of a predetermined reference signal from a base station (BS). The UE includes a transmitter that transmits an SRS using a second resource that is the first resource. The UE further includes a processor that determines a precoder applied to the SRS based on the predetermined reference signal. The transmitter transmits the SRS precoded using the determined precoder. The predetermined reference signal is a Channel State Information Reference Signal (CSI-RS), an SRS, or a Synchronization Signal Block (SSB)/Physical Broadcast Channel (PBCH).

公开(公告)号：US20210243726A1

公开(公告)日：2021-08-05

申请号：US17049251

申请日：2018-04-24

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Shinpei Yasukawa ,  Kazuki Takeda ,  Satoshi Nagata

IPC: H04W72/02 ,  H04W72/04 ,  H04W4/40

Abstract: A disclosed communication apparatus includes a receiver configured to receive control information for a specified communication apparatus from a base station; and a transmitter configured to identify, based on the control information, a resource used by the specified communication apparatus for communication, and to execute a process of not performing transmission using the identified resources.

公开(公告)号：US20210167929A1

公开(公告)日：2021-06-03

申请号：US17054341

申请日：2018-05-30

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Kazuaki Takeda ,  Huan Wang ,  Xufei Zheng ,  Xiaolin Hou

IPC: H04L5/00 ,  H04W72/04 ,  H04B1/713

Abstract: A communication device includes a transmitter that transmits data; and a controller that generates, in response to a predetermined trigger, a request signal including information on a time and frequency location of a radio resource to be used by the transmitter.

公开(公告)号：US20210051605A1

公开(公告)日：2021-02-18

申请号：US16967864

申请日：2018-02-15

Applicant: NTT DOCOMO, INC.

Inventor： Tooru Uchino ,  Ryosuke Osawa ,  Kazuki Takeda ,  Kazuaki Takeda ,  Hideaki Takahashi

IPC: H04W52/36 ,  H04W52/14 ,  H04W52/24

Abstract: A user equipment in a radio communication system including the user equipment and a base station, including: an uplink transmission power information calculation unit configured to calculate uplink transmission power information of a serving cell using a parameter that may be changed dynamically; and a signal transmission unit configured to include, in control information in which the uplink transmission power information is set, identification information for identifying a parameter used for calculation of the uplink transmission power information, and to transmit the control information in which the identification information is included to the base station.

公开(公告)号：US20200163025A1

公开(公告)日：2020-05-21

申请号：US16636144

申请日：2017-08-04

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa

IPC: H04W52/14 ,  H04W52/02

Abstract: A user terminal according to one aspect of the present disclosure is characterized by having a control section that applies power reduction to transmit power in a given carrier, and a transmitting section that transmits a given signal using transmit power applied with the power reduction. According to one aspect of the present disclosure, it is possible to suppress degradation in communication throughput and the like, also in the case of performing power reduction.

公开(公告)号：US20200059898A1

公开(公告)日：2020-02-20

申请号：US16609426

申请日：2017-05-01

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Hiroki Harada ,  Yuichi Kakishima

IPC: H04W72/02 ,  H04W72/04 ,  H04W74/08 ,  H04W72/08

Abstract: A terminal is disclosed including a processor and a transmitter. The processor determines, based on a threshold of a criterion, a beam having the criterion that is equal to or greater than the threshold. Further, the transmitter transmits a random access preamble based on the determined beam. In other aspects, a radio communication method for a terminal is also disclosed.