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).

  • Patent number: 10436842
    Abstract: Provided is a technique related to a terminal apparatus, a base station apparatus, a communication system, a communication method, and an integrated circuit that are capable of efficiently performing device-to-device communication. In a case where a terminal apparatus capable of direct communication between terminal apparatuses starts a timer corresponding to a group index that identifies short-range group communication, to which the terminal apparatus belongs, and the timer expires, switching is performed from a first radio resource allocation method, by which a radio resource to be used for the direct communication is requested to a base station apparatus, to a second radio resource allocation method by which the terminal apparatus selects a radio resource to be used for the direct communication.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: October 8, 2019
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsunari Uemura, Shohei Yamada, Hidekazu Tsuboi
  • Patent number: 10433340
    Abstract: A mobile station (MS) obtains a parameter, performs transmission of a preamble, and sets a counter incremented based on transmission of the preamble. The MS is able to indicate a random access problem corresponding to one transmission timing cell group in a case where the counter reaches the parameter+1 and the transmission of the preamble is performed on the one transmission timing cell group, where the one transmission timing cell group being one of the plurality of transmission timing cell groups, and the MS is able to not indicate a random access problem corresponding to another transmission timing cell group in a case where the counter reaches the parameter+1 and the transmission of the preamble is performed on the another transmission timing cell group, where the another transmission timing cell group being one of the plurality of transmission timing cell groups.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: October 1, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuyuki Kato, Katsunari Uemura, Shoichi Suzuki
  • Patent number: 10419990
    Abstract: Wireless terminals, base stations, telecommunications systems, telecommunications methods, and integrated circuits whereby efficient selecting of network cells in which terminals are camped and made available. A base station transmits, respectively, first system information that relates to a cell-selection performed by conventional terminals, and second system information that relates to a cell-selection performed by terminals that support coverage enhancement, and a terminal considers cells to which the second system information is not transmitted as barred cells, and in a case where the second system information is transmitted, performs a cell-selection using cell-selection parameters that relate to coverage-enhancement cells.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: September 17, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Shohei Yamada, Yasuyuki Kato, Hidekazu Tsuboi
  • Patent number: 10405339
    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: Grant
    Filed: March 17, 2016
    Date of Patent: September 3, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Katsunari Uemura, Yasuyuki Kato, Hidekazu Tsuboi
  • Patent number: 10397964
    Abstract: In a wireless communication system, a terminal apparatus is capable of reporting, to a base station apparatus, information indicating a mobility state of the terminal apparatus. In a case where the terminal apparatus reports information (history information) to the base station apparatus as mobility state indicating information, the terminal apparatus notifies the base station apparatus of a radio resource control connection setup complete message containing information indicating the presence of the history information that is notified as the mobility state indicating information. The history information contains an identifier of a cell that the terminal apparatus visited and the duration of stay in the cell. The base station apparatus notifies the terminal apparatus of information as to whether to report the mobility state indicating information.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: August 27, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Tsuboi, Katsunari Uemura
  • Patent number: 10390251
    Abstract: Provided is a technology related to a terminal device, a base station device, a communication system, a measurement method and an integrated circuit that efficiently perform cell measurement. The base station device configures a primary cell and one or more secondary cells to the terminal device, and indicates a measurement object, a reporting configuration including information indicating a threshold associated with an RSSI report and a report interval, and a measurement identity for linking the reporting configuration and the measurement object, to the terminal device. When, in each configured measurement identity, an associated reporting configuration includes information indicating the threshold associated with the RSSI report and the report interval, the terminal device periodically reports an average value of RSSIs measured in a duration of the report interval, and a percentage of the RSSIs being beyond the threshold as a measurement result.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: August 20, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Shohei Yamada, Hidekazu Tsuboi
  • Patent number: 10389493
    Abstract: A terminal device and a base station device efficiently communicate with each other. The terminal device includes a transmission unit configured to repeatedly transmit uplink control information including at least one CQI using a plurality of PUCCHs in a plurality of subframes, in a case where uplink control information is transmitted in the PUCCH in an initial subframe included in the plurality of subframes, based on whether the uplink control information includes an HARQ-ACK, (i) the uplink control information is transmitted using the PUCCH in a first subframe included in the plurality of subframes, or (ii) the uplink control information is not transmitted in the first subframe included in the plurality of subframes.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: August 20, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shoichi Suzuki, Tatsushi Aiba, Shohei Yamada, Katsunari Uemura, Kazunari Yokomakura
  • Patent number: 10390262
    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: Grant
    Filed: December 28, 2015
    Date of Patent: August 20, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Tsuboi, Katsunari Uemura, Yasuyuki Kato, Shohei Yamada
  • Patent number: 10382180
    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: Grant
    Filed: October 5, 2017
    Date of Patent: August 13, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shoichi Suzuki, Shohei Yamada, Katsunari Uemura, Daiichiro Nakashima
  • Patent number: 10321502
    Abstract: There are provided a terminal device, a base station apparatus, a communication system, a communication control method, and an integrated circuit, in all of which efficient communication control is possible in communication that uses multiple cells. In communication that uses first RLC which corresponds to a first cell group which includes at least the primary cell, second RLC which corresponds to a second cell group which does not include the primary cell, and one PDCP which belongs to the first cell group which processes pieces of data on the first RLC and the second RLC, the terminal device releases the second RLC based on a list that includes identifiers of data radio bearers relating to the second RLC, which is received from the base station apparatus.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: June 11, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Hidekazu Tsuboi, Yasuyuki Kato
  • Patent number: 10320536
    Abstract: Disclosed are a communication system, a base station apparatus, a mobile station apparatus, and a method for communication, which facilitate efficient administration of information for settings maintained by base station apparatuses and mobile station apparatuses in a system involving a plurality of component carriers. A mobile communications system including the base station apparatus and the mobile station apparatus administers the system information of one or more component carriers possessing select spectrum width from the system spectrum. When a component carrier is added to the mobile station apparatus, the system applies the system information belonging to the component carriers already connected to the system to the component carrier added thereto.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: June 11, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Katsunari Uemura
  • Patent number: 10321411
    Abstract: A terminal apparatus for communication with a base station apparatus includes reception circuitry and a transmission circuitry. The reception circuitry receives a higher layer signal and sets first and second parameter sets for an uplink power control. The transmission circuitry transmits an uplink signal. If a cell of a first base station and a cell of a second base station are configured, the transmission circuitry sets a transmit power for the uplink signal based on the first parameter set upon detecting a DCI format from the first base station and sets transmit power based on the second parameter set upon detecting a DCI format from the second base station.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: June 11, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Wataru Ouchi, Kimihiko Imamura, Yosuke Akimoto, Toshizo Nogami, Daiichiro Nakashima, Kazuyuki Shimezawa, Shoichi Suzuki, Yasuyuki Kato, Katsunari Uemura
  • Publication number: 20190141558
    Abstract: A communication system that includes at least 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, wherein each serving cell of the plurality of serving cells has a different frequency. The terminal apparatus receives (from the base station apparatus) a measurement configuration which includes a reporting configuration, a measurement object to indicate a measurement frequency and a measurement identity which links the measurement object to the reporting configuration. The terminal apparatus, in a case that an entry condition of the event corresponding with an event identity of the reporting configuration is fulfilled, transmits (to the base station apparatus) a measurement report which includes measurement results of all of the serving cells.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 9, 2019
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Daiichiro NAKASHIMA, Waho OH
  • Patent number: 10285211
    Abstract: There are provided a terminal device, a base station apparatus, a communication system, a communication control method, and an integrated circuit, in all of which efficient communication control is possible in communication that uses multiple cells. In communication that uses first RLC which corresponds to a first cell group which includes at least the primary cell, second RLC which corresponds to a second cell group which does not include the primary cell, and one PDCP which belongs to the first cell group which processes pieces of data on the first RLC and the second RLC, the terminal device releases the second RLC based on a list that includes identifiers of data radio bearers relating to the second RLC, which is received from the base station apparatus.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: May 7, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Hidekazu Tsuboi, Yasuyuki Kato
  • Publication number: 20190124718
    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: December 17, 2018
    Publication date: April 25, 2019
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Hidekazu TSUBOI
  • Patent number: 10264536
    Abstract: A mobile station (MS) receives a first reception signal using a first downlink component carrier (DCC) and receives a second reception signal using the second DCC. The first reception signal includes a synchronization signal, a first physical channel, and a first reference signal. The first physical channel and the first reference signal are obtained using a first cell identity. The second reception signal includes a second physical channel and a second reference signal. The second physical channel and the second reference signal are obtained using a second cell identity. The MS acquires information relating the second cell identity, the information being carried by the first reception signal. The MS extracts the information from the first reception signal carried after the mobile station establishes connection in a first cell via a cell search using the synchronization signal. The second DCC is used simultaneously with the first DCC.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: April 16, 2019
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshizo Nogami, Tatsushi Aiba, Shohei Yamada, Hidekazu Tsuboi, Katsunari Uemura, Daiichiro Nakashima, Shoichi Suzuki
  • Publication number: 20190110289
    Abstract: A mobile station apparatus configures first and second timers related to first and second groups. A first group of cells uses a first uplink transmission timing, and a second group of secondary cells uses a second uplink transmission timing. When the first timer of the first group has expired: all transmission HARQ buffers in association with the cells of the first group are flushed, the second timer is considered as expired, and an uplink transmission on any cells except random access preamble transmission on the primary cell is stopped. In a case where the second timer of the second group has expired: all transmission HARQ buffers in association with the secondary cells of the second group are flushed, and an uplink transmission on any cells in the second group except random access preamble transmission on the any cells in the second group is stopped.
    Type: Application
    Filed: December 6, 2018
    Publication date: April 11, 2019
    Inventors: Yasuyuki KATO, Katsunari UEMURA, Daiichiro NAKASHIMA, Shoichi SUZUKI
  • Publication number: 20190098587
    Abstract: There are provided a base station, a terminal, and a communication system in a wireless communication system in which a base station and a terminal communicate with each other, in which the base station and the terminal can efficiently perform communication. The communication system includes a higher layer processing unit 605 configured to configure, at the base station, for each terminal, a first reference signal configuration for configuring a measurement target for channel state reporting, configured to configure, at the base station, for each terminal, a second reference signal configuration specifying a resource element to be excluded from the target of data demodulation in a case where the terminal demodulates data, and configured to configure, at the base station, for each terminal, a third reference signal configuration for configuring a measurement target for which a reference signal received power is to be measured by the terminal.
    Type: Application
    Filed: November 21, 2018
    Publication date: March 28, 2019
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kimihiko IMAMURA, Wataru OUCHI, Yosuke AKIMOTO, Toshizo NOGAMI, Daiichiro NAKASHIMA, Kazuyuki SHIMEZAWA, Shoichi SUZUKI, Yasuyuki KATO, Katsunari UEMURA
  • Publication number: 20190075558
    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: November 1, 2018
    Publication date: March 7, 2019
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Daiichiro NAKASHIMA, Waho OH
  • Patent number: RE47489
    Abstract: To improve the delivery probability of a random access channel and increase the information amount notified on the random access channel. In a mobile communication system in which a mobile station apparatus and base station apparatus perform multicarrier communication with each other, the mobile station apparatus sets transmission control information about a random access channel based on a state of the mobile station apparatus in transmitting the random access channel, and the base station apparatus determines the state of the mobile station apparatus based on the transmission control information notified on the random access channel, and performs optimal scheduling corresponding to the state of the mobile station apparatus.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: July 2, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Katsunari Uemura