公开(公告)号：US12074656B2

公开(公告)日：2024-08-27

申请号：US17756988

申请日：2019-12-13

申请人： NTT DOCOMO, INC.

发明人： Yuichi Kakishima ,  Takuma Takada

IPC分类号： H04B17/318 ,  H04L5/00

CPC分类号： H04B17/328 ,  H04L5/0048

摘要： A terminal includes a receiving unit that receives a reference signal for acquiring a channel state and a control unit that performs measurement related to RSRP (Reference signal received power), based on a result of receiving the reference signal, and subcarrier spacing to be applied to the reference signal.

公开(公告)号：US12058664B2

公开(公告)日：2024-08-06

申请号：US17282260

申请日：2018-10-05

申请人： NTT DOCOMO, INC.

发明人： Yuichi Kakishima ,  Yuki Matsumura ,  Hideaki Takahashi

IPC分类号： H04W72/044 ,  H04W8/24 ,  H04W72/23

CPC分类号： H04W72/046 ,  H04W8/24 ,  H04W72/23

摘要： Provided are a user terminal, a radio base station, and a radio communication method that are capable of performing reception processing using the number of suitable MIMO layers for a downlink. The user terminal includes a reception section that receives a downlink signal from the radio base station. Furthermore, the user terminal includes a control section that assumes the maximum number of MIMO layers based on control information that is included in the downlink signal. In a case where the downlink signal includes first control information indicating the number of MIMO layers, the control section assumes the maximum number of MIMO layers based on the first control information.

公开(公告)号：US11894925B2

公开(公告)日：2024-02-06

申请号：US16080409

申请日：2017-02-28

申请人： NTT DOCOMO, INC.

发明人： Chongning Na ,  Huiling Jiang ,  Yuichi Kakishima ,  Satoshi Nagata

IPC分类号： H04L1/00 ,  H04L5/00

CPC分类号： H04L1/0027 ,  H04L1/0026 ,  H04L5/0005 ,  H04L5/0048 ,  H04L5/0064

摘要： An embodiment of present disclosure provides a method of transmitting channel state information reference signals, and a base station. An embodiment of the present disclosure provides a method of transmitting channel state information reference signals (CSI-RSs), which is executed by a base station, and this method includes the steps of determining whether or not it is necessary to use aperiodic CSI-RSs in a communication system in which a base station to use periodic CSI-RSs is provided, generating an aperiodic CSI-RS trigger signal and communicating the aperiodic CSI-RS trigger signal to a mobile station when aperiodic CSI-RSs need to be used, and communicating aperiodic CSI-RSs to the mobile station in accordance with the aperiodic CSI-RS trigger signal.

公开(公告)号：US11881968B2

公开(公告)日：2024-01-23

申请号：US16958510

申请日：2017-12-27

申请人： NTT DOCOMO, INC.

发明人： Ryosuke Osawa ,  Yuichi Kakishima

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

CPC分类号： H04L25/0226 ,  H04B7/0482 ,  H04L5/0051

摘要： 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：US20230300650A1

公开(公告)日：2023-09-21

申请号：US17768418

申请日：2020-10-15

申请人： NTT DOCOMO, INC.

发明人： Yuichi Kakishima ,  Takuma Takada

IPC分类号： H04W24/10 ,  H04B17/336 ,  H04W56/00

CPC分类号： H04W24/10 ,  H04B17/336 ,  H04W56/0015

摘要： A terminal includes a receiving unit that receives a block and a reference signal that is for measuring a channel state, wherein the block includes a synchronization signal and system information; and a control unit that measures L1-SINR (Layer1 Signal to interference plus noise power ratio) based on the block including the synchronization signal and the system information, the reference signal for measuring the channel state, and measurement using a resource for measuring interference, wherein the control unit determines a period of measurement of the Ll-SINR based on a configuration of the resource for measuring the interference.

公开(公告)号：US20230123943A1

公开(公告)日：2023-04-20

申请号：US17914614

申请日：2020-03-31

申请人： NTT DOCOMO, INC.

发明人： Tomoki Yokokawa ,  Yuichi Kakishima ,  Takuma Takada

IPC分类号： H04W24/10 ,  H04W88/02

摘要： A terminal including: a reception unit configured to receive configuration information of a time length for advancing a measurement gap from a base station apparatus; and a control unit configured to perform measurement, wherein the configuration information includes, as the time length for advancing the measurement gap, a time length selected from a plurality of time lengths including a predetermined time length shorter than 0.25 ms, and wherein the control unit is configured to perform measurement in the measurement gap advanced by the time length included in the configuration information.

公开(公告)号：US20230063137A1

公开(公告)日：2023-03-02

申请号：US17760054

申请日：2020-02-13

申请人： NTT DOCOMO, INC.

发明人： Yuki Matsumura ,  Yuichi Kakishima ,  Satoshi Nagata

IPC分类号： H04W16/28 ,  H04L5/00

摘要： A terminal according to an aspect of the present disclosure includes: a receiving section that receives a medium access control-control element (MAC CE) indicating a transmission configuration indication (TCI) state; and a control section that uses the TCI state for a spatial relation of a specific uplink signal at timing after acknowledgment (ACK) transmission to the MAC CE when the specific uplink signal satisfies an application condition. According to one aspect of the present disclosure, a UL signal can be appropriately transmitted.

公开(公告)号：US11515923B2

公开(公告)日：2022-11-29

申请号：US17266825

申请日：2018-08-09

申请人： NTT DOCOMO, INC.

发明人： Yuichi Kakishima ,  Yuki Matsumura ,  Ryosuke Osawa ,  Satoshi Nagata

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

摘要： 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：US20220286880A1

公开(公告)日：2022-09-08

申请号：US17631237

申请日：2019-08-15

申请人： NTT DOCOMO, INC.

发明人： Yuichi Kakishima ,  Tooru Uchino ,  Takuma Takada ,  Xiaolin Hou ,  Lihui Wang

IPC分类号： H04W24/08 ,  H04W56/00 ,  H04L1/20

摘要： A terminal includes a receiver that receives an instruction signal indicating to modify a configuration of a radio link monitoring; and a controller that modifies a parameter used for the configuration of the radio link monitoring in accordance with the instruction signal received by the receiver.

公开(公告)号：US11411694B2

公开(公告)日：2022-08-09

申请号：US16090484

申请日：2017-03-31

申请人： NTT DOCOMO, INC. ,  DOCOMO INNOVATIONS, INC.

发明人： Yuichi Kakishima ,  Satoshi Nagata ,  Chongning Na

IPC分类号： H04L5/00 ,  H04L25/02

摘要： A method of aperiodic signal transmission from a base station (BS) to a user equipment (UE) includes transmitting, from the BS to the UE, reservation information indicating first resources reserved for aperiodic signal transmission via higher layer signaling, transmitting, from the BS to the UE, Downlink Control Information (DCI) indicating at least a second resource to be selected based on the first resources, and transmitting, from the BS to the UE, the aperiodic signals using the first resources.