Patents by Inventor Tooru Uchino

Tooru Uchino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220286880
    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.
    Type: Application
    Filed: August 15, 2019
    Publication date: September 8, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Yuichi Kakishima, Tooru Uchino, Takuma Takada, Xiaolin Hou, Lihui Wang
  • Publication number: 20220279363
    Abstract: A gNB includes a transmitting unit that transmits, to a source gNB, a first message including configuration information of a cell subordinate to the gNB; and a control unit that determines deletion of the configuration information of the cell depending on a state of the cell. The transmitting unit transmits, to the source gNB, a second message giving an instruction to delete the configuration information of the cell.
    Type: Application
    Filed: August 14, 2019
    Publication date: September 1, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Tianyang Min, Hideaki Takahashi
  • Publication number: 20220279407
    Abstract: A terminal is disclosed including a receiving unit that receives, from a source radio base station, a message which has a list including plural pieces of information on candidate cells and transition conditions associated with the candidate cells, a first transaction ID being included in a piece of information on each candidate cell, and a second transaction ID being included in the message; a control unit that performs, when one transaction condition included in the list in the message is satisfied, a synchronization with one candidate cell associated with the one transaction condition, and performs a transition to a target radio base station which configures one piece of information of the one candidate cell, without receiving a handover command; and a transmitting unit that transmits, to the source radio base station, a first complete message in which the second transaction ID is included, before a start of the synchronization, and transmits, to the target radio base station, a second complete message in w
    Type: Application
    Filed: August 14, 2019
    Publication date: September 1, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Tianyang Min, Hideaki Takahashi
  • Publication number: 20220279406
    Abstract: A terminal is disclosed including a receiving unit that receives, from a source radio base station, a first configuration message including information on a candidate cell and a transition condition to the candidate cell; a transmitting unit that transmits, to the source radio base station, a complete message to the first configuration message; and a control unit that performs a modification of the information on the candidate cell and the transition condition to the candidate cell based on a second configuration message received from the source radio base station, after the complete message is transmitted, wherein in a case where the transition condition is satisfied, the control unit performs a synchronization with the candidate cell and performs a transition to a target radio base station which configures the information on the candidate cell, without receiving a handover command.
    Type: Application
    Filed: August 14, 2019
    Publication date: September 1, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Tianyang Min, Hideaki Takahashi
  • Publication number: 20220232568
    Abstract: A terminal (200) includes a control unit (250) that controls to a dormant state in which monitoring of PDCCH is not performed at least in a cell. The control unit (250) suspends transmission of a specific uplink signal using the cell in the dormant state.
    Type: Application
    Filed: June 26, 2019
    Publication date: July 21, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Hideaki Takahashi
  • Publication number: 20220217663
    Abstract: A terminal is disclosed including a transmitting unit that transmits a request signal for requesting a radio base station to transmit a reference time, to the radio base station; and a receiving unit that receives a radio resource control message from the radio base station according to the transmission of the request signal, the radio resource control message including a reference system frame number and the reference time associated with the reference system frame number. In other aspects, radio base stations, a radio communication method, and a radio communication system are also disclosed.
    Type: Application
    Filed: April 26, 2019
    Publication date: July 7, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Teruaki Toeda, Tooru Uchino, Tianyang Min
  • Publication number: 20220217788
    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.
    Type: Application
    Filed: May 2, 2019
    Publication date: July 7, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tomoya Ohara, Tooru Uchino, Hideaki Takahashi, Lihui Wang, Xiaolin Hou
  • Patent number: 11382162
    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.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: July 5, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Tooru Uchino
  • Patent number: 11381372
    Abstract: User equipment for transmitting an uplink control channel in multiple cells simultaneously in a radio communication system where transmission of the uplink control channel in a secondary cell is supported is disclosed.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: July 5, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Kazuki Takeda, Hideaki Takahashi, Kazuaki Takeda
  • Publication number: 20220210693
    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.
    Type: Application
    Filed: April 26, 2019
    Publication date: June 30, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Teruaki Toeda, Tooru Uchino
  • Publication number: 20220210852
    Abstract: A UE determines whether or not a gNB different from an eNB to which the UE is connected retains related information indicating a situation of the UE. The UE transmits a connection request with the gNB to the gNB even in a case where the gNB does not retain the related information.
    Type: Application
    Filed: April 5, 2019
    Publication date: June 30, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Hideaki Takahashi, Akihito Hanaki
  • Publication number: 20220210837
    Abstract: A user equipment includes a transmission unit that transmits a first message including a random access preamble in a two-step random access procedure, a reception unit that receives one or more second messages for contention resolution in the two-step random access procedure, and a control unit that controls an operation to receive the second messages based on information associated with an identifier of the first message included in the second messages.
    Type: Application
    Filed: April 26, 2019
    Publication date: June 30, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Hideaki Takahashi, Tomoya Ohara, Lihui Wang, Xiaolin Hou
  • Publication number: 20220210645
    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.
    Type: Application
    Filed: April 28, 2020
    Publication date: June 30, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Tooru Uchino
  • Patent number: 11374693
    Abstract: A terminal is disclosed that includes a processor that determines a cyclic shift to be applied to a demodulation reference signal, based on a plurality of candidates configured by higher layer signaling and based on a field, for indicating a physical uplink control channel (PUCCH) resource for an uplink control information (UCI), included in a downlink control information. The terminal further includes a transmitter that transmits the UCI using a PUCCH format, in which the determined cyclic shift is applied to the demodulation reference signal and to which an orthogonal code having a sequence length less than 5 is applied, where the processor controls a frequency-domain orthogonal cover code (freq-domain OCC) to be applied for the PUCCH format, and where a number of bits of the UCI is more than 2. In other aspects, a base station and another terminal are also disclosed.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: June 28, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Kazuki Takeda, Tooru Uchino, Satoshi Nagata
  • Patent number: 11375460
    Abstract: A user equipment in a radio communication system including the user equipment and a base station, including: an uplink transmission power information calculation unit configured to calculate uplink transmission power information of a serving cell using a parameter that may be changed dynamically; and a signal transmission unit configured to include, in control information in which the uplink transmission power information is set, identification information for identifying a parameter used for calculation of the uplink transmission power information, and to transmit the control information in which the identification information is included to the base station.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: June 28, 2022
    Assignee: NTT DOCOMO, INC.
    Inventors: Tooru Uchino, Ryosuke Osawa, Kazuki Takeda, Kazuaki Takeda, Hideaki Takahashi
  • Publication number: 20220201570
    Abstract: A user apparatus is provided. The user apparatus includes a control unit configured to determine, when a predetermined operation is triggered in a case of a predetermined-condition-based handover having been configured, which of an operation of the predetermined-condition-based handover or the predetermined operation is to be given priority. The control unit stops or suspends an operation that has not been given the priority.
    Type: Application
    Filed: May 1, 2019
    Publication date: June 23, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Naoya Murata, Tooru Uchino, Akihito Hanaki
  • Publication number: 20220200733
    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.
    Type: Application
    Filed: April 26, 2019
    Publication date: June 23, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Teruaki Toeda, Tooru Uchino, Tianyang Min
  • Publication number: 20220201768
    Abstract: A base station apparatus includes: a receiving unit configured to receive a first message from user equipment in a two-step random access procedure; and a control unit that determines not to return any feedback to the user equipment when the receiving unit correctly receives only some of a plurality of messages included in the first message.
    Type: Application
    Filed: May 2, 2019
    Publication date: June 23, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Tomoya Ohara, Tooru Uchino, Hideaki Takahashi, Lihui Wang, Xiaolin Hou
  • Publication number: 20220191770
    Abstract: A user equipment includes a receiving unit configured to receive system information from a cell, a control unit configured to determine, based on an information element and identifiers, whether or not the cell is a candidate to be selected, the information element indicating other uses included in the system information and identifiers being of a plurality of closed access groups (CAGs) identifying groups of subscribers who are allowed to access the cell, and a communication unit configured to perform access to the cell in a case in which the control unit determines that the cell is the candidate to be selected.
    Type: Application
    Filed: March 27, 2019
    Publication date: June 16, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Tooru Uchino
  • Publication number: 20220182978
    Abstract: A user equipment includes a receiving unit configured to receive a first number of multiple input multiple output (MIMO) layers and a second number of MIMO layers from a base station device, a control unit configured to select the first number of MIMO layers or the second number of MIMO layers for an activated bandwidth part (BWP) based on a type of the activated BWP, and a communication unit configured to perform communication using the selected number of MIMO layers, in which the first number of MIMO layers is a number of MIMO layers configured for a default BWP or an initial BWP, and the second number of MIMO layers is a number of MIMO layers configured for each cell.
    Type: Application
    Filed: March 28, 2019
    Publication date: June 9, 2022
    Applicant: NTT DOCOMO, INC.
    Inventors: Hideaki Takahashi, Tooru Uchino, Tomoya Ohara