Patents by Inventor Kimihiko Imamura

Kimihiko Imamura 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: 10855500
    Abstract: A method for enabling a PUCCH with a TTI equal to or less than 1 ms. A terminal apparatus includes a transmitter configured to transmit an uplink signal on a PUCCH corresponding to a single SC-FDMA symbol, and a controller configured to determine transmit power for transmission on the PUCCH, wherein the uplink signal is generated based on a first sequence and a second sequence, the first sequence is given by applying a first cyclic shift to a third sequence, the second sequence is given by applying a second cyclic shift to the third sequence, and transmit power for transmission on the PUCCH is given based on a value of the first cyclic shift and a value of the second cyclic shift.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: December 1, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Tomoki Yoshimura, Takashi Hayashi, Shoichi Suzuki, Tatsushi Aiba, Wataru Ouchi, Liqing Liu, Kimihiko Imamura
  • Patent number: 10855418
    Abstract: Provided is a terminal communicating with a base station, in which in a case where a physical downlink control channel is monitored in a first physical downlink control channel-physical resource block set, the physical downlink control channel is decoded in such a manner that the physical downlink control channel is rate-matched based on a prescribed reference signal, and in which, in a case where the physical downlink control channel is monitored in a second physical downlink control channel-physical resource block set, the physical downlink control channel is decoded in such a manner that the physical downlink control channel is rate-matched based on a reference signal that is set individually for each terminal.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: December 1, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Toshizo Nogami, Shoichi Suzuki, Kimihiko Imamura, Kazuyuki Shimezawa, Naoki Kusashima
  • Patent number: 10848289
    Abstract: The present invention enables efficient transmission/reception of a signal including control information between a base station apparatus and a mobile station apparatus. To realize this, there are provided a receiver configured to receive an enhanced physical downlink control channel from the base station apparatus; a setting unit configured to be able to set, using at least a format of downlink control information included in the received enhanced physical downlink control channel, one of a plurality of possible sets of M, M being the number of first elements that constitute the enhanced physical downlink control channel; and a monitoring unit configured to monitor a search region in which the enhanced physical downlink control channel obtained on the basis of the set possible set of M is possibly mapped.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: November 24, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kimihiko Imamura, Daiichiro Nakashima, Toshizo Nogami, Kazuyuki Shimezawa
  • 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
  • Publication number: 20200350969
    Abstract: There is provided a terminal device that communicates with a base station apparatus. The device includes: a higher layer processing unit that configures a discovery signal which includes cell-specific reference signals present in DwPTSs of all downlink subframes and all special subframes, a first synchronization signal present in a prescribed subframe, a second synchronization signal present in a first subframe, and one or more non-zero power CSI reference signals during a period of continuous subframes in a predetermined cell; and a reception unit that receives the discovery signal. A subframe offset between the second synchronization signal and the non-zero power CSI reference signal is independently configured for each of the non-zero power CSI reference signals.
    Type: Application
    Filed: July 17, 2020
    Publication date: November 5, 2020
    Inventors: Kazuyuki SHIMEZAWA, Toshizo NOGAMI, Naoki KUSASHIMA, Kimihiko IMAMURA
  • Publication number: 20200344016
    Abstract: A terminal apparatus includes a coding unit configured to divide a transport block into one or more code blocks and generate coded bit(s) by coding the one or more code blocks; and a transmitter configured to transmit the coded bit(s) by using a channel, wherein multiplex bit(s) are given based on at least coupling of the coded bit(s) generated by coding of the one or more code blocks, the coding unit maps the multiplex bit(s) to a matrix in a first-axis prioritized manner and reads the multiplex bit(s) from the matrix in the first-axis prioritized manner or in a second-axis prioritized manner, and whether the first axis or the second axis is prioritized in a case that the multiplex bit(s) are read from the matrix is given based on at least whether a signal waveform applied to a prescribed channel is an OFDM.
    Type: Application
    Filed: July 15, 2020
    Publication date: October 29, 2020
    Inventors: Tomoki YOSHIMURA, Shoichi SUZUKI, Tatsushi AIBA, Liqing LIU, Wataru OUCHI, Takashi HAYASHI, Kimihiko IMAMURA
  • Publication number: 20200336192
    Abstract: A wireless communication device may autonomously transition from a multiple antenna port mode to a single antenna port mode. The wireless communication device may implicitly notify a base station about the autonomous transition from the multiple antenna port mode to the single antenna port mode. The base station may reallocate resources that were previously allocated to the wireless communication device but that are no longer being used by the wireless communication device. In some cases, the base station may configure the wireless communication device's antenna port mode via radio resource control signaling.
    Type: Application
    Filed: July 3, 2020
    Publication date: October 22, 2020
    Inventors: Kimihiko Imamura, John Michael Kowalski, Sayantan Choudhury
  • Patent number: 10805955
    Abstract: An apparatus includes: a transmitter configured to transmit a transport block on PUSCH; and a physical layer processing unit configured to calculate transmit power of the PUSCH, at least based on a number of SC-FDMA symbols NPUSCH-initialsymb for PUSCH initial transmission for the transport block, wherein the number of the SC-FDMA symbols NPUSCH-initialsymb is given at least based on NLBT and a number of SC-FDMA symbols NULsymb included in an uplink slot, and a value of NLBT is 1 in a case that a time continuous signal of a first SC-FDMA symbol included in the PUSCH is generated based on a content of a resource element corresponding to a second SC-FDMA symbol following the first SC-FDMA symbol.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 13, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Tomoki Yoshimura, Wataru Ouchi, Shoichi Suzuki, Liqing Liu, Kimihiko Imamura
  • Patent number: 10797823
    Abstract: A terminal apparatus includes: a receiver configured to detect a DCI format in a search space; a coding unit configured to divide a transport block into one or multiple code blocks, based at least on the DCI format and code the one or multiple code blocks to generate coded bits; and a transmitter configured to transmit the coded bits on a PUSCH. Multiplexed bits are given based at least on concatenation of the coded bits generated by coding the one or multiple code blocks. The coding unit maps the multiplexed bits to a matrix in a first-axis prioritized manner and reads out the multiplexed bits mapped to the matrix in the first-axis prioritized manner or a second-axis prioritized manner. Whether to prioritize the first axis or the second axis in a case of reading out the multiplexed bits mapped to the matrix, is based at least on whether or not the search space is CSS.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: October 6, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG INNOVATION COMPANY LIMITED
    Inventors: Tomoki Yoshimura, Shoichi Suzuki, Wataru Ouchi, Liqing Liu, Kimihiko Imamura
  • Patent number: 10797844
    Abstract: There are provided a terminal device, a base station device, and an integrated circuit that enable a base station device and a terminal device to determine parameters related to uplink signals or uplink reference signals and to perform efficient communication.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: October 6, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tatsushi Aiba, Shoichi Suzuki, Kimihiko Imamura, Wataru Ouchi, Kazunari Yokomakura
  • 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
  • Patent number: 10779265
    Abstract: A search space of a control channel which is monitored by a terminal is determined based on a first uplink-downlink configuration specific to a base station, a second uplink-downlink configuration specific to a terminal, and one or more EPDCCH subframe configuration, for each subframe. A scrambling sequence parameter which corresponds to the search space of the control channel and is used in scrambling of the control channel is switched. The terminal switches the scrambling sequence parameter, corresponding to the search space and a subframe configuration, and the terminal receives a DMRS and descrambles an EPDCCH by using the switched scrambling sequence parameter.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: September 15, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Naoki Kusashima, Kazuyuki Shimezawa, Toshizo Nogami, Shoichi Suzuki, Kimihiko Imamura, Alvaro Ruiz Delgado
  • Patent number: 10779322
    Abstract: Provided is a terminal apparatus configured to: receive, in a first PDCCH, a first uplink grant to which first CRC parity bits scrambled with a C-RNTI for a dynamically scheduled transmission is attached; receive, in a second PDCCH, a second uplink grant to which second CRC parity bits scrambled with SPS C-RNTI for a semi-persistently scheduled transmission is attached; perform multiple transmissions corresponding to a bundle, based on the first uplink grant or the second uplink grant; and determine a redundancy version corresponding to each of the multiple transmissions, excluding a first transmission of the multiple transmissions, based at least on whether the bundle is associated with the second uplink grant.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: September 15, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG INNOVATION COMPANY LIMITED
    Inventors: Shoichi Suzuki, Tatsushi Aiba, Wataru Ouchi, Takashi Hayashi, Tomoki Yoshimura, Liqing Liu, Kimihiko Imamura
  • Patent number: 10771202
    Abstract: A terminal apparatus includes a coding unit configured to divide a transport block into one or more code blocks and generate coded bit(s) by coding the one or more code blocks; and a transmitter configured to transmit the coded bit(s) by using a channel, wherein multiplex bit(s) are given based on at least coupling of the coded bit(s) generated by coding of the one or more code blocks, the coding unit maps the multiplex bit(s) to a matrix in a first-axis prioritized manner and reads the multiplex bit(s) from the matrix in the first-axis prioritized manner or in a second-axis prioritized manner, and whether the first axis or the second axis is prioritized in a case that the multiplex bit(s) are read from the matrix is given based on at least whether a signal waveform applied to a prescribed channel is an OFDM.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: September 8, 2020
    Assignees: Sharp Kabushiki Kaisha, FG Innovation Company Limited
    Inventors: Tomoki Yoshimura, Shoichi Suzuki, Tatsushi Aiba, Liqing Liu, Wataru Ouchi, Takashi Hayashi, Kimihiko Imamura
  • Patent number: 10763936
    Abstract: There is provided a terminal device that communicates with a base station apparatus. The device includes: a higher layer processing unit that configures a discovery signal which includes cell-specific reference signals present in DwPTSs of all downlink subframes and all special subframes, a first synchronization signal present in a prescribed subframe, a second synchronization signal present in a first subframe, and one or more non-zero power CSI reference signals during a period of continuous subframes in a predetermined cell; and a reception unit that receives the discovery signal. A subframe offset between the second synchronization signal and the non-zero power CSI reference signal is independently configured for each of the non-zero power CSI reference signals.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: September 1, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazuyuki Shimezawa, Toshizo Nogami, Naoki Kusashima, Kimihiko Imamura
  • Patent number: 10742465
    Abstract: A method by a user equipment (UE) is described. The method includes receiving a first physical signal, determining a first physical structure based on information in the first physical signal, and determining resource elements based on the first physical structure. A first set of subcarriers with first subcarrier spacing which is integer multiple or integer sub-multiple of second subcarrier spacing are mapped such that in addition to a slot boundary one or more of starting positions or ending positions of first subcarriers with the first subcarrier spacing in a first set of OFDM symbols are aligned with one or more of starting positions or ending positions of second subcarriers with the second subcarrier spacing in a second set of OFDM symbols.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: August 11, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shohei Yamada, Kazunari Yokomakura, Shoichi Suzuki, Hidekazu Tsuboi, Kimihiko Imamura
  • Patent number: 10728071
    Abstract: Uplink control information can be efficiently transmitted. A terminal apparatus (1) receives an uplink grant used for scheduling of a PUSCH in a serving cell and an uplink grant used for scheduling of a sPUSCH in the serving cell, transmits a periodic channel state information report by using the PUCCH in the serving cell, and in a case that transmission of the sPUSCH occurs in a subframe in which transmission of the periodic channel state information report by using the PUCCH has already started, stops the transmission of the PUCCH already started. According to the present invention, the terminal apparatus (1) can efficiently transmit the uplink control information. The base station apparatus (3) can efficiently receive the uplink control information.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: July 28, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Shoichi Suzuki, Tatsushi Aiba, Kimihiko Imamura, Wataru Ohuchi, Takashi Hayashi, Tomoki Yoshimura, Liqing Liu
  • Patent number: 10721716
    Abstract: A cell using an unallocated frequency band or a shared frequency band is efficiently controlled. A terminal device includes a reception unit configured to receive a first downlink physical channel mapped on the basis of a first possible starting position of a downlink transmission and a second downlink physical channel mapped on the basis of a second possible starting position of the downlink transmission. Upon the first possible starting position and the second possible starting position being indicated by a higher layer, the reception unit receives, in a predetermined subframe, either one of the first downlink physical channel or the second downlink physical channel, on a secondary cell having a frame structure type 3.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 21, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kazuyuki Shimezawa, Naoki Kusashima, Alvaro Ruiz Delgado, Kimihiko Imamura, Shoichi Suzuki
  • Patent number: 10721725
    Abstract: A terminal device includes means of determining resource elements to which a physical downlink shared channel is mapped for transmission on the physical downlink shared channel in a non-MBSFN subframe that is scheduled by using a downlink control information format 1A based on positions of cell-specific reference signals that are provided by using a physical layer cell identity.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: July 21, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tatsushi Aiba, Kazuyuki Shimezawa, Shoichi Suzuki, Kimihiko Imamura
  • Patent number: 10707944
    Abstract: A wireless communication device may autonomously transition from a multiple antenna port mode to a single antenna port mode. The wireless communication device may implicitly notify a base station about the autonomous transition from the multiple antenna port mode to the single antenna port mode. The base station may reallocate resources that were previously allocated to the wireless communication device but that are no longer being used by the wireless communication device. In some cases, the base station may configure the wireless communication device's antenna port mode via radio resource control signaling.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: July 7, 2020
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kimihiko Imamura, John Michael Kowalski, Sayantan Choudhury