Patents by Inventor Katsunari Uemura

Katsunari Uemura 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).

  • SYSTEMS AND METHODS FOR A PHYSICAL UPLINK CONTROL CHANNEL ON A SECONDARY CELL
    Publication number: 20180077749
    Abstract: A method by a user equipment (UE) is described. The method includes receiving by the RRC entity of the UE, a PUCCH release request from a lower layer of the UE, and applying the default physical channel configuration for a scheduling request configuration for a concerned secondary cell, upon receiving the PUCCH release request from the lower layers of the UE. The PUCCH release request is notified by a Medium Access Control (MAC) entity of the UE in a case that a time alignment timer expires, the time alignment timer is associated with a secondary timing advance group (sTAG) and the concerned secondary cell belongs to the sTAG.
    Type: Application
    Filed: March 18, 2016
    Publication date: March 15, 2018
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Hidekazu TSUBOI
  • TERMINAL DEVICE, BASE STATION DEVICE, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT
    Publication number: 20180070403
    Abstract: Provided is technology relating to: a terminal device, a base station device, a communication system, a communication method, and an integrated circuit capable of efficiently performing a radio resource control procedure. The terminal device is provided with a first sublayer and a second sublayer that is a lower sublayer than the first sublayer. The first sublayer creates an RRC message corresponding to an RRC procedure and starts a timer relating to the RRC procedure on the basis of coverage level information. The second sublayer executes a random access procedure relating to the RRC procedure on a serving cell, determines the coverage level information in the random access procedure, and selects a random access preamble group on the basis of the determined coverage level information.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 8, 2018
    Inventors: KATSUNARI UEMURA, SHOHEI YAMADA, YASUYUKI KATO, HIDEKAZU TSUBOI
  • MOBILE STATION APPARATUS AND BASE STATION APPARATUS
    Publication number: 20180070359
    Abstract: A communication system that includes a terminal apparatus and a base station apparatus. The terminal apparatus obtains, from the base station apparatus, information regarding addition of a component carrier, whereby the information regarding addition of the component carrier comprises information related to carrier frequency of the component carrier and information related to system bandwidth of the component carrier. The base station apparatus provides, to the terminal apparatus, information regarding addition of a component carrier, whereby the information regarding addition of the component carrier comprises information related to carrier frequency of the component carrier and information related to system bandwidth of the component carrier.
    Type: Application
    Filed: November 14, 2017
    Publication date: March 8, 2018
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shohei YAMADA, Katsunari UEMURA
  • TERMINAL DEVICE, BASE STATION DEVICE, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT
    Publication number: 20180070278
    Abstract: Provided is technology relating to: a terminal device, a base station device, a communication method, and an integrated circuit capable of efficiently performing a Radio Resource Control procedure. The terminal device is configured to, when receiving, from the base station device, an RRC message including information on a target cell, random access information relating to a coverage level, and a timer relating to a handover and indicating the handover, start the timer relating to the handover and execute a random access to the target cell using the random access information relating to the coverage level of the target cell.
    Type: Application
    Filed: March 25, 2016
    Publication date: March 8, 2018
    Inventors: KATSUNARI UEMURA, SHOHEI YAMADA, YASUYUKI KATO, HIDEKAZU TSUBOI
  • Terminal apparatus, base station apparatus, and control methods for secondary cells
    Patent number: 9913287
    Abstract: Provided is a technique related to a terminal apparatus, a base station apparatus, a communication system, a control method, and an integrated circuit, which efficiently controls a state of a cell for a plurality of cells. In the terminal apparatus using a plurality of cells, configuration information which disables change in a state of a cell is received from the base station apparatus, and control is performed based on the received configuration information so that a state of a part of cells among the plurality of cells is not changed.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: March 6, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Yasuyuki Kato, Hidekazu Tsuboi
  • SYSTEMS AND METHODS FOR A PHYSICAL UPLINK CONTROL CHANNEL ON A SECONDARY CELL
    Publication number: 20180063832
    Abstract: A method by a user equipment (UE) is described. The method includes receiving a RRC message including a first parameter related to a maximum number of scheduling request transmission for a secondary cell, performing a scheduling request procedure based on the first parameter, and transmitting a scheduling request on a Physical Uplink Control Channel (PUCCH) on the secondary cell. The RRC message further includes a second parameter related to a maximum number of scheduling request transmission for a primary cell and the scheduling request procedure is performed further based on the second parameter.
    Type: Application
    Filed: March 17, 2016
    Publication date: March 1, 2018
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Hidekazu TSUBOI
  • Communication system, mobile station apparatus, radio link state management method, and integrated circuit
    Patent number: 9907079
    Abstract: A mobile station apparatus that obtains, from the base station apparatus, frequency information for a one cell of the plurality of the cells and a parameter of a timer, where a state of the one cell is changed to deactivation state based on expiry of the timer.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: February 27, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Shohei Yamada, Daiichiro Nakashima, Yasuyuki Kato
  • SYSTEMS AND METHODS FOR A PHYSICAL UPLINK CONTROL CHANNEL ON A SECONDARY CELL
    Publication number: 20180049231
    Abstract: A method by a user equipment (UE) is described. The method includes instructing a physical layer of the UE to signal a scheduling request (SR) on a Physical Uplink Control Channel (PUCCH) based on whether scheduling request counter is less than the maximum number of scheduling request transmission, and transmitting, to an evolved Node B (eNB), the SR on either of the PUCCH on a primary cell and the PUCCH on a PUCCH secondary cell. The scheduling request counter is incremented in a case that the scheduling request counter is less than the maximum number of scheduling request transmission.
    Type: Application
    Filed: March 17, 2016
    Publication date: February 15, 2018
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Hidekazu TSUBOI
  • MOBILE STATION APPARATUS, BASE STATION APPARATUS, RADIO COMMUNICATION METHOD AND COMMUNICATION CIRCUIT
    Publication number: 20180041974
    Abstract: A mobile station apparatus configures a first group including at least one component carrier and a second group including at least one component carrier. The mobile station apparatus decodes a first physical downlink control channel on a first common search space in a first downlink component carrier and a second physical downlink control channel on a second common search space in a second downlink component carrier where first information transmitted on the first physical downlink control channel is applied to a first uplink component carrier within the first group, and where second information transmitted on the second physical downlink control channel is applied to a second uplink component carrier within the second group, and where the first downlink component carrier and the second downlink component carrier are indicated by a higher layer.
    Type: Application
    Filed: October 5, 2017
    Publication date: February 8, 2018
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Shoichi SUZUKI, Shohei YAMADA, Katsunari UEMURA, Daiichiro NAKASHIMA
  • TERMINAL APPARATUS, BASE STATION APPARATUS, METHOD OF A TERMINAL APPARATUS, AND METHOD OF A BASE STATION APPARATUS
    Publication number: 20180042001
    Abstract: A communication system includes a terminal apparatus and a base station apparatus. The terminal apparatus communicates with a base station apparatus by carrier aggregation using a plurality of serving cells, where each of the plurality of serving cells has a different frequency. In addition, the terminal apparatus removes a measurement identity relevant to a serving cell of the plurality of serving cells based on that the serving cell was removed.
    Type: Application
    Filed: October 17, 2017
    Publication date: February 8, 2018
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Daiichiro NAKASHIMA, Waho OH
  • SYSTEMS AND METHODS FOR A PHYSICAL UPLINK CONTROL CHANNEL ON A SECONDARY CELL
    Publication number: 20180035453
    Abstract: A method by a user equipment (UE) is described. The method includes receiving, an evolved Node B (eNB) a RRC message including a parameter related to a SR periodicity for a secondary cell and a parameter related to a SR prohibit timer; and setting the SR prohibit timer based on the SR periodicity for the secondary cell.
    Type: Application
    Filed: March 18, 2016
    Publication date: February 1, 2018
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Hidekazu TSUBOI
  • Wireless terminals, base stations, communication systems, communication methods, and integrated circuits
    Patent number: 9883428
    Abstract: Wireless terminals, base stations, telecommunications systems, telecommunications methods, and integrated circuits whereby efficient selecting of network cells in which terminals are camped are made available. A base station includes an information element that relates to cell reselection, which indicates whether each neighboring cell is a coverage-enhancement cell, in system information on the cells that support coverage enhancement, and transmits the system information, and a terminal, in a case where a serving cell is a coverage-enhancement cell, performs, based on system information that relates to cell reselection, a cell-reselection using cell-reselection parameters that relate to the coverage-enhancement cells.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: January 30, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsunari Uemura, Shohei Yamada, Yasuyuki Kato, Hidekazu Tsuboi
  • Terminal device, base station device, communication system, control method, and integrated circuit
    Patent number: 9883467
    Abstract: In a terminal device that uses a plurality of cells, the plurality of cells are grouped into a cell group for a first base station device and a cell group for a second base station device, and processing for activation/deactivation of the plurality of cells is performed on a cell in the cell group that receive a control element indicating the activation/deactivation, and in a case where the cell group for the second base station is added, a power headroom indicating capacity available for transmit power in the plurality of cells is determined as being triggered, and power headrooms of the plurality of cells that are activated are reported.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: January 30, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Yasuyuki Kato, Hidekazu Tsuboi
  • TERMINAL DEVICE, BASE STATION DEVICE, RADIO COMMUNICATION METHOD, AND INTEGRATED CIRCUIT
    Publication number: 20180020378
    Abstract: A terminal device derives the number of repetitive transmissions and/or repetitive receptions required on the basis of the downlink reference signal received power, compares that number with the number of repetitive transmissions and/or repetitive receptions configured in the terminal device, performs a random access procedure upon the numbers being different from each other, and determines a configuration for the number of some or all repetitive transmissions and/or repetitive receptions during the random access procedure on the basis of the former number of repetitions.
    Type: Application
    Filed: December 28, 2015
    Publication date: January 18, 2018
    Inventors: HIDEKAZU TSUBOI, KATSUNARI UEMURA, YASUYUKI KATO, SHOHEI YAMADA
  • Mobile station apparatus stopping uplink transmission based on timer expiration and, method and processor corresponding to the same
    Patent number: 9872281
    Abstract: In a mobile station that performs communication with a base station device via a plurality of cells, the plurality of cells are grouped into a first group constituted by cells having an uplink transmission timing that is the same as that of one primary cell and a second group constituted by one or more cells having an uplink transmission timing that is different from that of the primary cell. The uplink transmission timings are each managed using a corresponding transmission timing timer for each of the groups. In a case where a transmission timing timer for the first group has expired, the mobile station stops all uplink transmissions in the plurality of cells. In a case where a transmission timing timer for the second group has expired, the mobile station stops uplink transmissions in the cells constituting the second group for which the transmission timing timer has expired.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: January 16, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuyuki Kato, Katsunari Uemura, Daiichiro Nakashima, Shoichi Suzuki
  • TERMINAL APPARATUS, BASE STATION APPARATUS, AND METHOD FOR TERMINAL APPARATUS
    Publication number: 20180014257
    Abstract: In a communication system in which a base station apparatus and a terminal apparatus communicate with each other, a base station apparatus, a terminal apparatus, and a communication system with which the base station apparatus and the terminal apparatus can efficiently communicate with each other are provided. The terminal apparatus that communicates with the base station apparatus includes a radio resource control section 6011 that configures a plurality of uplink physical channels and that configures an uplink power control-related parameter for each of the plurality of uplink physical channels in accordance with information included in a radio resource control (RRC) signal and a transmission power control section 6015 that sets transmission power of the uplink physical channels on the basis of the uplink power control-related parameters.
    Type: Application
    Filed: September 22, 2017
    Publication date: January 11, 2018
    Inventors: Wataru OUCHI, Kimihiko IMAMURA, Daiichiro NAKASHIMA, Toshizo NOGAMI, Kazuyuki SHIMEZAWA, Shoichi SUZUKI, Yasuyuki KATO, Katsunari UEMURA
  • Mobile station, base station, and method for managing synchronization state
    Patent number: 9854484
    Abstract: A synchronization state is efficiently managed in a mobile station to which cells are allocated. A base station notifies the mobile station of information about whether or not a transmission timing before a handover for each of cell groups of the mobile station is to be applied after the handover. The mobile station sets whether or not the transmission timing adjusted for each cell group is to be applied after the handover, on the basis of the received information.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: December 26, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Tsuboi, Katsunari Uemura, Yasuyuki Kato
  • Terminal device, integrated circuit, and radio communication method capable of reducing power consumption in radio communication system to which dynamic TDD is applied
    Patent number: 9854599
    Abstract: A terminal device sets a first UL-DL configuration, sets a subframe for monitoring a physical downlink control channel accompanied with information indicating a second UL-DL configuration, monitors the physical control channel accompanied with information indicating the second UL-DL configuration in the set subframe during an active time based on a first subframe set as a downlink subframe or a subframe including a DwPTS based on the first UL-DL configuration, and monitors a physical downlink control channel accompanied with a C-RNTI in a second subframe set as a downlink subframe or a subframe including the DwPTS based on the second UL-DL configuration during the active time.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: December 26, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shoichi Suzuki, Tatsushi Aiba, Yasuyuki Kato, Daiichiro Nakashima, Katsunari Uemura, Kazunari Yokomakura, Kimihiko Imamura
  • TERMINAL DEVICE, BASE STATION DEVICE, CONTROL METHOD, AND INTEGRATED CIRCUIT
    Publication number: 20170366999
    Abstract: A terminal device includes a transmission processing part configured to notify the network of a type of the terminal device, and a reception processing part configured to derive the required number of repetitive transmissions and/or repetitive receptions (the first number of repetitions) on the basis of downlink reference signal received power. The terminal device measures the downlink reference signal received power on the basis of the first measurement period longer than 200 ms, upon deriving the first number of repetitions. The type of the terminal device notified to the network is different from a type of a terminal device employing a measurement period of 200 ms.
    Type: Application
    Filed: December 28, 2015
    Publication date: December 21, 2017
    Applicant: Sharp Kabushiki Kaisha
    Inventors: HIDEKAZU TSUBOI, KATSUNARI UEMURA, YASUYUKI KATO, SHOHEI YAMADA
  • TERMINAL DEVICE, BASE STATION DEVICE, RADIO COMMUNICATION METHOD, AND INTEGRATED CIRCUIT
    Publication number: 20170359836
    Abstract: A terminal device configured to communicate with a base station device receives random access common information including information on a random access response reception and information on a contention resolution message reception for each repetition level from the base station device, selects a random access preamble corresponding to a repetition level using the random access common information, and selects a contention resolution timer value corresponding to the repetition level selected from the random access common information.
    Type: Application
    Filed: December 28, 2015
    Publication date: December 14, 2017
    Inventors: YASUYUKI KATO, KATSUNARI UEMURA, SHOHEI YAMADA, HIDEKAZU TSUBOI