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: 11229084
    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: Grant
    Filed: March 23, 2020
    Date of Patent: January 18, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Katsunari Uemura, Yasuyuki Kato, Hidekazu Tsuboi
  • Publication number: 20210392701
    Abstract: A terminal apparatus executing radio communication with a base station apparatus, the terminal apparatus: transmits a first message, including a random access preamble and identification information of the terminal apparatus, for starting a random access procedure to the base station apparatus; receives a second message, including a random access response to the first message, from the base station apparatus; and selects one random access preamble group from among a plurality of random access preamble groups on the basis of a first condition, a second condition, a third condition, and a status of the terminal apparatus, in order to notify the base station apparatus of the status of the terminal apparatus when transmitting the first message. Consequently, even when a 2-step random access procedure is adopted, radio resources for the radio communication between the base station apparatus and the terminal apparatus can be used efficiently.
    Type: Application
    Filed: February 14, 2019
    Publication date: December 16, 2021
    Inventor: Katsunari UEMURA
  • Patent number: 11197316
    Abstract: Disclosed is a radio communication system in which a base station device and a terminal device communicate with each other, and the terminal device performs a random access procedure. The base station device notifies the terminal device of random access common configuration information including the number of repetitions for each level, information indicating a relationship between group information of random access preambles and the level, and the number of attempts of preamble transmission for each level. A MAC layer in the terminal device performs processing of increasing the level in a case that a first counter exceeds the number of attempts of transmission corresponding to the level.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: December 7, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuyuki Kato, Shohei Yamada, Katsunari Uemura, Hidekazu Tsuboi
  • Patent number: 11178718
    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: Grant
    Filed: March 25, 2016
    Date of Patent: November 16, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Shohei Yamada, Yasuyuki Kato, Hidekazu Tsuboi
  • Publication number: 20210352653
    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: July 19, 2021
    Publication date: November 11, 2021
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Daiichiro NAKASHIMA, Waho OH
  • Patent number: 11115847
    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: Grant
    Filed: December 28, 2015
    Date of Patent: September 7, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Tsuboi, Katsunari Uemura, Yasuyuki Kato, Shohei Yamada
  • Patent number: 11071118
    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: Grant
    Filed: December 2, 2019
    Date of Patent: July 20, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Katsunari Uemura, Yasuyuki Kato, Daiichiro Nakashima, Waho Oh
  • Patent number: 11044646
    Abstract: Provided is a technique related to a terminal apparatus, a base station apparatus, a communication system, a communication method, and an integrated circuit which are capable of efficiently performing device-to-device communication. Based on a measurement result of an inter-frequency neighboring cell that supports the direct communication, a cell selection criterion that is used for cell selection, and system information related to the direct communication, which is acquired from a base station apparatus, a terminal apparatus capable of direct communication with a terminal apparatus performs the direct communication with the inter-frequency neighboring cell by using a radio resource pool that is indicated with the system information.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: June 22, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Hidekazu Tsuboi
  • Patent number: 11039442
    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: Grant
    Filed: July 7, 2020
    Date of Patent: June 15, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Katsunari Uemura
  • Publication number: 20210037557
    Abstract: A method by a user equipment (UE) is described. The method includes determining a repetition level, determining a initialization value for a scrambling sequence generator based on the repetition level, generating the scrambling sequence, and applying the scrambling sequence for a Physical Downlink Shared Channel (PDSCH). The repetition level is associated with the PDSCH and determined by a Radio Resource Control (RRC) configuration.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 4, 2021
    Inventors: Shohei YAMADA, Katsunari UEMURA, Yasuyuki KATO, Hidekazu TSUBOI
  • Patent number: 10887925
    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: August 5, 2019
    Date of Patent: January 5, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuyuki Kato, Katsunari Uemura, Shoichi Suzuki
  • Patent number: 10873982
    Abstract: Provided is a technique related to a terminal apparatus, a control method, and an integrated circuit that are able to efficiently perform connection control when performing device-to-device communication. At a time of re-establishing radio resource control connection, at least on a basis of whether or not device-to-device data communication is able to be performed in a selected cell and whether or not there is data of the device-to-device data communication in the terminal apparatus, the terminal apparatus selects information about the device-to-device data communication, which is to be notified to the base station apparatus.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: December 22, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Tsuboi, Katsunari Uemura
  • Patent number: 10849147
    Abstract: A method by a user equipment (UE) is described. The method includes determining a repetition level, determining a initialization value for a scrambling sequence generator based on the repetition level, generating the scrambling sequence, and applying the scrambling sequence for a Physical Downlink Shared Channel (PDSCH). The repetition level is associated with the PDSCH and determined by a Radio Resource Control (RRC) configuration.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: November 24, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Katsunari Uemura, Yasuyuki Kato, Hidekazu Tsuboi
  • Publication number: 20200359438
    Abstract: A terminal device, a base station device, a communication system, a measurement method, and an integrated circuit, which are capable of efficiently performing Sidelink Direct Discovery, are provided. In the terminal device, a reception unit is configured to receive an RRC connection reconfiguration message including a first configuration related to Sidelink Direct Discovery, and in a case where the first configuration includes frequency information, to attempt to acquire configuration information about monitoring of a Sidelink Direct Discovery announcement at a frequency indicated by the frequency information, using a timer configured to count a predetermined time and while the timer is counting, by acquiring system information to be broadcast at the frequency.
    Type: Application
    Filed: July 30, 2020
    Publication date: November 12, 2020
    Inventors: HIDEKAZU TSUBOI, KATSUNARI UEMURA, SHOHEI YAMADA
  • Patent number: 10834734
    Abstract: A wireless communication system in which a first base station apparatus and a second base station apparatus communicate with a terminal apparatus. The first base station apparatus transmits, to the terminal apparatus, data control information related to data transmission and reception of the terminal apparatus and preferential base station apparatus information indicating a priority of data transmission to the base station apparatus, and the terminal apparatus determines any base station apparatus of the first base station apparatus and the second base station apparatus, as a data transmission destination base station apparatus, for data to which bearer split is configured by the data control information, based on at least one of the preferential base station apparatus information and terminal information of the terminal apparatus.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: November 10, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuyuki Kato, Katsunari Uemura, Hidekazu Tsuboi
  • Publication number: 20200351800
    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: July 17, 2020
    Publication date: November 5, 2020
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kimihiko IMAMURA, Wataru OUCHI, Yosuke AKIMOTO, Toshizo NOGAMI, Daiichiro NAKASHIMA, Kazuyuki SHIMEZAWA, Shoichi SUZUKI, Yasuyuki KATO, Katsunari UEMURA
  • Patent number: 10820223
    Abstract: A terminal device, a base station device, a communication method, and an integrated circuit are provided for efficiently performing measurements. A base station device notifies a terminal device of a report configuration including information about an RSSI report, a measurement object indicating at least one frequency assumed as a frequency applicable for an RSSI measurement by the terminal device, and a measurement identifier for linking the report configuration to the measurement object. In a case where the information about the RSSI report is included in a report configuration associated with a measurement identifier, the terminal device assumes at least one frequency indicated by the measurement object associated with the report configuration as the frequency applicable for the RSSI measurement. In a case where at least one frequency to be reported is present, the terminal device reports an RSSI result measured at such an associated frequency, as a measurement result.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: October 27, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsunari Uemura, Shohei Yamada, Hidekazu Tsuboi
  • Publication number: 20200337053
    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: July 7, 2020
    Publication date: October 22, 2020
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shohei YAMADA, Katsunari UEMURA
  • Publication number: 20200296719
    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: May 29, 2020
    Publication date: September 17, 2020
    Inventors: Yasuyuki KATO, Katsunari UEMURA, Daiichiro NAKASHIMA, Shoichi SUZUKI
  • Patent number: 10779247
    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: Grant
    Filed: November 21, 2018
    Date of Patent: September 15, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kimihiko Imamura, Wataru Ouchi, Yosuke Akimoto, Toshizo Nogami, Daiichiro Nakashima, Kazuyuki Shimezawa, Shoichi Suzuki, Yasuyuki Kato, Katsunari Uemura