公开(公告)号：US11147031B2

公开(公告)日：2021-10-12

申请号：US16315461

申请日：2017-07-03

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Kazuki Takeda ,  Satoshi Nagata

IPC: H04W56/00 ,  H04L7/04 ,  H04W72/04 ,  H04L27/26 ,  H04L7/00 ,  H04L5/00

Abstract: A future radio communication system (NR) appropriately detects a synchronization signal transmitted in a flexible time and frequency resource. A user terminal includes: a reception section that receives a synchronization signal and/or a common control information channel transmitted in a flexible resource; and a control section that recognizes a resource position at which the synchronization signal is transmitted, based on the synchronization signal or the common control information channel.

公开(公告)号：US20210307037A1

公开(公告)日：2021-09-30

申请号：US17265388

申请日：2018-08-03

Applicant: NTT DOCOMO, INC.

Inventor： Masaya Okamura ,  Kazuaki Takeda ,  Hiroki Harada ,  Yuki Matsumura

IPC: H04W72/12 ,  H04L1/08

Abstract: A user terminal according to one aspect of the present disclosure includes: a receiving section that receives information regarding the number of symbols instructed to perform UL transmission in a slot and information regarding the number of UL symbols in the slot; and a control section that determines whether or not to perform repetition transmission in the slot based on of the number of symbols instructed to perform UL transmission and the number of UL symbols. According to one aspect of the present disclosure, it is possible to perform suitable repetition transmission in units shorter than a slot.

公开(公告)号：US20210298078A1

公开(公告)日：2021-09-23

申请号：US17339694

申请日：2021-06-04

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Satoshi Nagata ,  Lihui Wang ,  Liu Liu ,  Huiling Jiang

IPC: H04W74/08 ,  H04W16/14 ,  H04W74/00 ,  H04W76/27 ,  H04W72/04

Abstract: A terminal is disclosed that includes a processor that controls transmission of a random access preamble based on at least one of information related to one or more PRACH transmission occasions in a time domain and information related to one or more PRACH transmission resources in a frequency domain. The terminal further includes a transmitter that transmits the random access preamble. In other aspects, a base station, radio communication method, and system are also disclosed.

公开(公告)号：US20210289557A1

公开(公告)日：2021-09-16

申请号：US16495236

申请日：2017-03-23

Applicant: NTT DOCOMO, INC.

Inventor： Tomoya Ohara ,  Hiroki Harada

IPC: H04W74/08 ,  H04W52/36 ,  H04W74/00 ,  H04W72/04 ,  H04W72/00

Abstract: A user apparatus in a radio communication system that includes a base station and the user apparatus includes a transmission unit that transmits a random access preamble with the use of a beam out of a plurality of beams; and a counter retaining unit that has, for each beam, a counter that indicates the number of times of power ramping performed in transmission of a random access preamble.

公开(公告)号：US11122544B2

公开(公告)日：2021-09-14

申请号：US16609426

申请日：2017-05-01

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Hiroki Harada ,  Yuichi Kakishima

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

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.

公开(公告)号：US20210258812A1

公开(公告)日：2021-08-19

申请号：US17253500

申请日：2018-06-28

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Naoki Fujimura ,  Takuma Takada

IPC: H04W24/10 ,  H04W24/08

Abstract: Measurement periods for quality measurement are specified for a first signal and a second signal. A user terminal includes: a reception section that receives the first signal based on first radio communication and the second signal based on second radio communication; and a control section that controls priority levels for quality measurements of the first radio communication and the second radio communication. The quality measurements are performed using the measurement periods.

公开(公告)号：US20210250115A1

公开(公告)日：2021-08-12

申请号：US17054402

申请日：2018-05-11

Applicant: NTT DOCOMO, INC.

Inventor： Hiroki Harada ,  Hideaki Takahashi

IPC: H04J11/00 ,  H04W72/04

Abstract: To appropriately perform notification control related to a synchronization raster position, one aspect of the user terminal according to the present disclosure includes: a reception section that receives a synchronization signal block including a first information element related to a subcarrier offset, and a second information element related to a downlink control channel for system information; and a control section that, when a given code point is indicated in the first information element, recognizes an absence of a control resource set for the system information associated with the synchronization signal block, and determines an information type to be notified based on a code point included in the second information element.

公开(公告)号：US11082931B2

公开(公告)日：2021-08-03

申请号：US16609121

申请日：2017-05-01

Applicant: NTT DOCOMO, INC.

Inventor： Ryosuke Osawa ,  Hiroki Harada ,  Yuichi Kakishima

IPC: H04W52/36

Abstract: According to one aspect of the present invention, a user terminal has a transmission section that is capable of transmitting a plurality of waveforms including a first waveform and a second waveform while switching therebetween, wherein the first waveform is based on a first transmission scheme and the second waveform is based on a second transmission scheme, and transmits the first waveform at a given timing, by using a given cell, and a control section that calculates a power headroom for the second waveform, which is one of the plurality of waveforms and which is not transmitted at the given timing. According to one aspect of the present invention, communication can be continued adequately even when communication is performed by using multiple waveforms.

公开(公告)号：US20210227549A1

公开(公告)日：2021-07-22

申请号：US17053952

申请日：2018-05-11

Applicant: NTT DOCOMO, INC.

Inventor： Daisuke Murayama ,  Hiroki Harada ,  Kazuaki Takeda ,  Satoshi Nagata

IPC: H04W72/04 ,  H04W74/08 ,  H04L5/00

Abstract: A user terminal of the present invention includes a receiving section that receives system information including an index value indicating a first offset value that is a value based on a certain bandwidth or zero, and a control section that determines frequency resources for an uplink control channel, based on the first offset value, the frequency resources frequency-hopping in the certain bandwidth.

公开(公告)号：US20210168744A1

公开(公告)日：2021-06-03

申请号：US17267241

申请日：2018-08-10

Applicant: NTT DOCOMO, INC.

Inventor： Yuki Matsumura ,  Masaya Okamura ,  Hiroki Harada ,  Satoshi Nagata

IPC: H04W56/00 ,  H04B7/06 ,  H04L5/00 ,  H04L27/26 ,  H04W16/28

Abstract: In order to appropriately control receiving operation in a UE even when a synchronization signal block and a given reference signal overlap with each other in a time resource, a user terminal according to an aspect of the present disclosure includes: a receiving section that receives a synchronization signal block and a given reference signal; and a control section that, when the synchronization signal block and the given reference signal are configured in the same time resource, controls reception of the synchronization signal block and the given reference signal based on a quasi-colocation (QCL) relationship and a subcarrier spacing of the synchronization signal block and the given reference signal.