公开(公告)号：US12156057B2

公开(公告)日：2024-11-26

申请号：US17631237

申请日：2019-08-15

Applicant: NTT DOCOMO, INC.

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

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

Abstract: 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：US12150177B2

公开(公告)日：2024-11-19

申请号：US17425657

申请日：2019-02-01

Applicant: NTT DOCOMO, INC.

Inventor： Tooru Uchino ,  Hideaki Takahashi

IPC: H04W74/0833 ,  H04W76/11

Abstract: User equipment includes a transmitter configured to transmit a random access preamble or an identifier of the user equipment to a base station apparatus in a two-step random access procedure, a receiver configured to receive a response signal corresponding to at least one of the random access preamble and the identifier of the user equipment, and a downlink signal based on the response signal, from the base station apparatus, and a control unit configured to determine that a contention resolution is successful when information included in the downlink signal matches a part of or all of the identifier of the user equipment.

公开(公告)号：US11979745B2

公开(公告)日：2024-05-07

申请号：US17610416

申请日：2020-04-28

Applicant: NTT DOCOMO, INC.

Inventor： Hideaki Takahashi ,  Tooru Uchino

IPC: H04W12/08 ,  H04W8/24

CPC classification number: H04W12/08 ,  H04W8/24

Abstract: A user equipment includes a receiving unit configured to receive, from a base station apparatus, information for requesting a report of a User Equipment (UE) capability, a control unit configured to generate the report including a supported UE capability, and a transmitting unit configured to, in a case where an Access Stratum (AS) security with the base station apparatus is activated, transmit the report to the base station apparatus.

公开(公告)号：US20220217788A1

公开(公告)日：2022-07-07

申请号：US17606961

申请日：2019-05-02

Applicant: NTT DOCOMO, INC.

Inventor： Tomoya Ohara ,  Tooru Uchino ,  Hideaki Takahashi ,  Lihui Wang ,  Xiaolin Hou

IPC: H04W74/08 ,  H04W72/04

Abstract: A user equipment includes a transmission unit that transmits a first message to a base station apparatus, the first message including a random access preamble in a two-step random access procedure, a reception unit that receives a second message for contention resolution in the two-step random access procedure from the base station apparatus, and a control unit that determines a transport block size of an uplink shared channel included in the first message based on a parameter associated with communication to the base station apparatus.

公开(公告)号：US11382162B2

公开(公告)日：2022-07-05

申请号：US16766493

申请日：2018-11-14

Applicant: NTT DOCOMO, INC.

Inventor： Hideaki Takahashi ,  Tooru Uchino

IPC: H04W76/19 ,  H04W72/04 ,  H04W74/08

Abstract: A user apparatus that performs beamforming-applied communications with a base station apparatus is provided. The user apparatus includes a reception unit configured to receive a beam transmitted from the base station apparatus, a control unit configured to perform control related to recovery of connection to the base station apparatus in a case where the reception unit fails to receive the beam, and a transmission unit configured to transmit a random access preamble or an uplink control signal based on the control related to recovery of connection.

公开(公告)号：US20220210693A1

公开(公告)日：2022-06-30

申请号：US17605498

申请日：2019-04-26

Applicant: NTT DOCOMO, INC.

Inventor： Teruaki Toeda ,  Tooru Uchino

IPC: H04W28/04 ,  H04L1/18

Abstract: A gNB-CU includes a transmitting unit that transmits a data unit of a protocol layer that handles packet data to a gNB-DU, a receiving unit that receives a data unit of the protocol layer from the gNB-DU, and a control unit that controls a discard timer of a data unit transmitted to the gNB-DU. The control unit determines an amount of delay between the gNB-CU and the gNB-DU and applies a timer value corresponding to the determined amount of delay to the discard timer.

公开(公告)号：US20220200733A1

公开(公告)日：2022-06-23

申请号：US17605959

申请日：2019-04-26

Applicant: NTT DOCOMO, INC.

Inventor： Teruaki Toeda ,  Tooru Uchino ,  Tianyang Min

IPC: H04L1/16 ,  H04L5/00 ,  H04W56/00 ,  H04J3/06

Abstract: A radio base station is disclosed including a first communication device that supports a cell; and a second communication device that is connected to the first communication device and controls the first communication device, wherein the second communication device transmits a radio resource control message including a reference system frame number and a reference time associated with the reference system frame number, to a terminal through the first communication device, and the first communication device transmits an acknowledgment to the transmission of the radio resource control message, to the second communication device. In other aspects, a radio communication method and a radio communication system are also disclosed.

公开(公告)号：US20220141691A1

公开(公告)日：2022-05-05

申请号：US17427813

申请日：2019-02-08

Applicant: NTT DOCOMO, INC.

Inventor： Hideaki Takahashi ,  Tianyang Min ,  Tooru Uchino

IPC: H04W24/10 ,  H04L1/16 ,  H04W56/00 ,  H04W76/15

Abstract: A user apparatus includes a communication unit configured to communicate with a first base station apparatus and a second base station apparatus, wherein the first base station apparatus is a master node in a New Radio (NR) radio communication system and the second base station apparatus is a secondary node in the NR radio communication system; a reception unit configured to receive from the first base station apparatus an instruction to measure a system frame number and frame timing difference (SFTD) representing a system frame number and frame timing difference between cells; a control unit configured to measure SFTD between a cell of the first base station apparatus and a cell of the second base station apparatus based on the instruction to measure SFTD; and a transmission unit configured to transmit to the first base station apparatus a measurement result including the measured SFTD.

公开(公告)号：US11323311B2

公开(公告)日：2022-05-03

申请号：US16763476

申请日：2017-11-15

Applicant: NTT DOCOMO, INC.

Inventor： Hideaki Takahashi ,  Tooru Uchino ,  Wuri Andarmawanti Hapsari ,  Anil Umesh

IPC: H04L12/24 ,  H04L41/0654 ,  H04W76/19 ,  H04W76/18 ,  H04W76/30 ,  H04W88/06

Abstract: Upon receiving, from UE (200), SCG Failure Information that indicates that a radio link failure has occurred in a secondary cell group, eNB (100A) transmits, to gNB (100B), Secondary Node Modification Request to instruct to release a resource of a split bearer of only a predetermined layer and the layers below thereof in the secondary cell group. Based on the received Secondary Node Modification Request, the gNB (100B) releases the resource of the split bearer below the predetermined layer in the secondary cell group. The eNB (100A) deletes setting itself of the secondary cell group when a bearer belonging to the secondary cell group other than the split bearer is not set.

公开(公告)号：US20220116889A1

公开(公告)日：2022-04-14

申请号：US17424356

申请日：2019-02-01

Applicant: NTT DOCOMO, INC.

Inventor： Tooru Uchino ,  Hideaki Takahashi

IPC: H04W52/36

Abstract: A user device includes a controller that calculates a power headroom report in a case in which the power headroom report is omissible, wherein the power headroom report includes a power headroom for a serving cell of a first base station device and a power headroom for a serving cell of a second base station device; and a transmitter that transmits the power headroom report to the first base station device, wherein a number of serving cells to which power headrooms are reported is identifiable based on the power headroom report.