公开(公告)号：US20210136794A1

公开(公告)日：2021-05-06

申请号：US16473767

申请日：2017-12-26

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/12

Abstract: The present invention is designed so that, even when communication is made using a plurality of transmission time intervals (TTIs), scheduling requests are transmitted adequately. According to one aspect of the present invention, a user terminal has a transmitting/receiving section that transmits and/or receives using a plurality of transmission time intervals (TTIs) of different durations, and a control section that determines a resource to use to transmit a scheduling request (SR) based on at least one of a first TTI and a second TTI having a shorter TTI duration than the first TTI.

公开(公告)号：US10980014B2

公开(公告)日：2021-04-13

申请号：US16337297

申请日：2017-09-29

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang ,  Na Li ,  Yong Li ,  Wenbo Wang

IPC: H04W72/04 ,  H04L1/18 ,  H04W28/04 ,  H04W72/12 ,  H04W28/06

Abstract: The present invention is designed so that, when special subframes are allowed to transmit a PUSCH, the transmission of the PUSCH can be controlled adequately. According to the present invention, a user terminal has a receiving section that receives downlink control information (DCI) that schedules an uplink (UL) shared channel, and a control section that controls transmission of the UL shared channel by using a table that associates a subframe, in which the DCI is received, and a timing, at which the UL shared channel is transmitted, per UL/downlink (DL) configuration. The transmission timing in the table is determined based on a special subframe, which is allowed to transmit the UL shared channel, and a predetermined reference value, which is lower than 4 ms.

公开(公告)号：US10911982B2

公开(公告)日：2021-02-02

申请号：US16490268

申请日：2017-03-02

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Qun Zhao ,  Xiaohang Chen ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04W28/06 ,  H04W28/04 ,  H04L1/00 ,  H04L1/18

Abstract: The present invention is designed to prevent communication performance from dropping in long TTI when preemption of long TTI by short TTI occurs. According to one aspect of the present invention, a user terminal has a receiving section that receives downlink (DL) data based on downlink control information (DCI) in a first transmission time interval (TTI), a transmission section that transmits delivery acknowledgement information in response to the DL data, and a control section that controls timing of transmitting the delivery acknowledgement information when indication information regarding preemption of the first TTI by a second TTI shorter than the first TTI is received in the receiving section.

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：US10693616B2

公开(公告)日：2020-06-23

申请号：US15752054

申请日：2016-08-12

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

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

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

Abstract: A method of Channel State Information Reference Signal (CSI-RS) transmission from a base station (BS) to a user equipment (UE) includes reserving, with the BS, a CSI-RS resource used for aperiodic CSI-RS transmission in subframes transmitted from the BS, transmitting, from the BS to the UE, reservation information indicating the CSI-RS resource via higher layer signaling, and transmitting, from the BS to the UE, the aperiodic CSI-RS using the CSI-RS resource.

公开(公告)号：US20200100220A1

公开(公告)日：2020-03-26

申请号：US16495512

申请日：2018-03-20

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Huiling Jiang

IPC: H04W72/04 ,  H04L5/00

Abstract: A base station is disclosed including a processor that maps one or more control channel elements (CCEs) in a downlink control channel to one or more resource units that are obtained by an interleaver for interleaving indexes of a plurality of resource units in a control resource set, and a transmitter transmits the downlink control channel. Each of the one or more resource units are being defined as a plurality of resource element groups (REGs). A transmitter transmits the downlink control channel. In other aspects, a terminal and a radio communication method are disclosed.

公开(公告)号：US20200052841A1

公开(公告)日：2020-02-13

申请号：US16492474

申请日：2017-03-10

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Shaozhen Guo ,  Lihui Wang ,  Xiaolin Hou ,  Huiling Jiang

IPC: H04L5/00 ,  H04J13/00

Abstract: The present invention is designed to properly control enabling or disabling hopping of DMRS sequence in sTTIs shorter than 1-ms TTIs. According to one aspect of the present invention, a user terminal has a transmission section that transmits a demodulation reference signal for an uplink (UL) channel in a second transmission time interval (TTI) that is shorter than a first TTI, and a control section that controls enabling or disabling hopping of a base sequence for the demodulation reference signal based on whether or not an orthogonal cover code (OCC) is applied to the demodulation reference signal.

公开(公告)号：US20200029307A1

公开(公告)日：2020-01-23

申请号：US16334867

申请日：2017-09-21

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Kazuaki Takeda ,  Satoshi Nagata ,  Qin Mu ,  Liu Liu ,  Lihui Wang ,  Huiling Jiang

IPC: H04W72/04 ,  H04W48/12 ,  H04L1/00 ,  H04L5/00

Abstract: The present invention is designed to allow communication based on appropriate numerologies even when multiple numerologies are used. According to one aspect of the present invention, a user terminal has a receiving section that monitors downlink control information by assuming a plurality of communication parameters that relate to a frequency domain and/or a time domain, and a control section that judges that at least part of parameters that relate to a search space for monitoring the downlink control information is different, for each of the communication parameters.

公开(公告)号：US20200008232A1

公开(公告)日：2020-01-02

申请号：US16482987

申请日：2018-02-02

Applicant: NTT DOCOMO, INC.

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

IPC: H04W72/12 ,  H04W72/04 ,  H04W80/08

Abstract: The present invention is designed to transmit and/or receive data adequately even when data scheduling methods that are different from those of existing LTE systems are applied. a receiving section that receives downlink control information, and a control section that controls receipt and/or transmission of data scheduled by the downlink control information, where data that is transmitted in the same slot as and/or a different slot from that of the downlink control information is scheduled by the downlink control information, and the control section identifies the position in the time direction where the data is allocated, based on the downlink control information and/or common control information that is common to predetermined user terminals.

公开(公告)号：US20200007213A1

公开(公告)日：2020-01-02

申请号：US16482934

申请日：2018-02-01

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Chongning Na ,  Huiling Li ,  Huiling Jiang ,  Satoshi Nagata

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

Abstract: A method of Channel State Information (CSI) reporting in a wireless communication system includes performing, with a user equipment (UE), advanced CSI reporting based on a high resolution CSI feedback scheme. The advanced CSI reporting includes a beam index that identifies each of beams and amplitude of the beam corresponding to the beam index. The performing performs the advanced CSI reporting using a Physical Uplink Control Channel (PUCCH) format 3/4/5. The beam index and the amplitude are located in the PUCCH format 3/4/5. The performing performs first advanced CSI reporting and performs second advanced CSI reporting after performing the first advanced CSI reporting. The first advanced CSI reporting includes one of the beam index and the amplitude. The second advanced CSI reporting includes the beam index or the amplitude that is not included in the first advanced CSI reporting.