公开(公告)号：US20220022053A1

公开(公告)日：2022-01-20

申请号：US17311292

申请日：2018-12-06

Applicant: NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Yuki Matsumura ,  Takayuki Furuta ,  Yuta Oguma

IPC: H04W16/28 ,  H04L5/00 ,  H04W56/00 ,  H04B7/06 ,  H04B7/08

Abstract: A user terminal according to one aspect of the present disclosure includes: a transmitting section that transmits information that indicates which beam correspondence that uses which downlink reference signal is supported; a receiving section that receives spatial relation information that indicates a downlink reference signal having a spatial relation with a sounding reference signal; and a control section that determines a spatial domain filter used to transmit an uplink signal, based on a spatial domain filter used to receive the downlink reference signal.

公开(公告)号：US11218202B2

公开(公告)日：2022-01-04

申请号：US16496295

申请日：2018-03-07

Applicant: NTT DOCOMO, INC.

Inventor： Min Liu ,  Liu Liu ,  Huiling Jiang ,  Xin Wang ,  Qin Mu ,  Chongning Na ,  Jing Wang ,  Yuichi Kakishima ,  Kazuaki Takeda ,  Satoshi Nagata

IPC: H04B7/06 ,  H04B7/0408 ,  H04W16/28

Abstract: Provided are a beam configuration method, a mobile station and a base station. The beam configuration method performed by a base station according to embodiments of the present invention includes: determining a beam transmission scheme for a mobile station according to performance of the mobile station; and transmitting information to the mobile station according to the beam transmission scheme.

公开(公告)号：US11201714B2

公开(公告)日：2021-12-14

申请号：US16650929

申请日：2017-09-29

Applicant: NTT DOCOMO, INC.

Inventor： Kazuki Takeda ,  Satoshi Nagata ,  Yuichi Kakishima ,  Huiling Li ,  Chongning Na ,  Lihui Wang ,  Xin Wang

IPC: H04L5/00

Abstract: To appropriately control UL transmission such as a CSI reporting when communication is performed by applying a different configuration from those of legacy LTE systems, one aspect of a user terminal according to the present invention includes: a transmitting section that transmits first Channel State Information (CSI) and second CSI of different information types to be reported, by using an uplink control channel and/or an uplink shared channel based on timings respectively configured by a base station; and a control section that, when transmission timings of the first CSI and the second CSI overlap, performs control to transmit both or one of the first CSI and the second CSI.

公开(公告)号：US11196602B2

公开(公告)日：2021-12-07

申请号：US16651133

申请日：2017-09-29

Applicant: NTT DOCOMO, INC.

Inventor： Keisuke Saito ,  Kazuaki Takeda ,  Satoshi Nagata ,  Yuichi Kakishima

IPC: H04L27/26 ,  H04W74/00

Abstract: A terminal is disclosed including a processor configured to map a phase tracking reference signal, PTRS, to at least one symbol used for an uplink shared channel starting from a leading symbol of the uplink shared channel; and a transmitter configured to perform transmission processing for the uplink shared channel and the PTRS. In other aspects, another terminal and a base station are also disclosed.

公开(公告)号：US20210351829A1

公开(公告)日：2021-11-11

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：US11146371B2

公开(公告)日：2021-10-12

申请号：US16090481

申请日：2017-03-30

Applicant: DOCOMO INNOVATIONS, INC. ,  NTT DOCOMO, INC.

Inventor： Yuichi Kakishima ,  Satoshi Nagata ,  Chongning Na

IPC: H04W4/00 ,  H04L5/00 ,  H04B7/0417

Abstract: A method of transmission of Channel State Information Reference Signals (CSI-RSs) includes transmitting, from a base station (BS) to a user equipment (UE), the CSI-RSs using 24 antenna ports (APs) or 32 APs. A first CSI-RS configuration for the APs are configured by aggregating a predetermined number of second CSI-RS configurations. A number of APs per each of the second CSI-RS configurations is 2, 4, or 8.

公开(公告)号：US20210058274A1

公开(公告)日：2021-02-25

申请号：US16958510

申请日：2017-12-27

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Yuichi Kakishima

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

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：US20210058203A1

公开(公告)日：2021-02-25

申请号：US16982259

申请日：2018-03-30

Applicant: NTT DOCOMO, INC.

Inventor： Hideyuki Moroga ,  Satoshi Nagata ,  Yuichi Kakishima

IPC: H04L5/00

Abstract: User equipment for communicating with a base station includes a processing unit, wherein when transmitting a physical uplink shared channel (PUSCH) to the base station prior to establishment of a radio resource control (RRC) connection between the base station and the user equipment, the processing unit controls frequency hopping applied to the PUSCH and a demodulation reference signal; a reception unit for receiving from the base station information indicating that frequency hopping is applied to the PUSCH; and a transmission unit for transmitting the PUSCH and the demodulation reference signal to which frequency hopping is applied; wherein the demodulation reference signal for demodulating a single PUSCH is formed of one front-loaded demodulation reference signal and one additional demodulation reference signal, and when the duration in symbols of the PUSCH does not support one additional demodulation reference signal, the demodulation reference signal is formed of a front-loaded demodulation reference signal.

公开(公告)号：US20200267804A1

公开(公告)日：2020-08-20

申请号：US16651516

申请日：2018-09-28

Applicant: NTT DOCOMO, INC.

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

IPC: H04W88/06 ,  H04W72/08 ,  H04W72/04

Abstract: A user equipment (UE) includes a receiver that receives, from a base station (B S), multiple reference signals transmitted using first beams, a processor, and a transmitter. The first beams comprise at least one second beam used for Physical Downlink Control Channel (PDCCH) transmission between the BS and the UE and third beams that are not used for the PDCCH transmission. The processor measures quality of the first beams. The transmitter reports, to the BS, the quality of the at least one second beam and part of the third beams.

公开(公告)号：US20200228384A1

公开(公告)日：2020-07-16

申请号：US16649102

申请日：2017-09-25

Applicant: NTT DOCOMO, INC.

Inventor： Keisuke Saito ,  Kazuaki Takeda ,  Satoshi Nagata ,  Yuichi Kakishima

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04

Abstract: A terminal includes a processor that arranges a demodulation reference signal (DMRS) in a first resource, and arranges a phase tracking reference signal (PTRS) in an interval of a number of symbols in a second resource with a symbol of the DMRS as a starting point, and a transmitter that transmits, to a base station apparatus, the DMRS and the PTRS that are arranged in the first resource and the second resource, respectively.