Patents by Inventor Yoshiyuki Oota

Yoshiyuki Oota 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: 9291599
    Abstract: A magnetic testing apparatus 100 according to the present invention comprises: a first magnetizing device 1 for applying a DC bias magnetic field to a test object P in substantially parallel to the direction in which a flaw F to be detected extends; a second magnetizing device 2 for applying an AC magnetic field to the test object P substantially perpendicularly to the direction in which the flaw F to be detected extends; and a detecting device 3 for detecting leakage flux produced by the magnetization of the test object P accomplished by the first magnetizing device 1 and the second magnetizing device 2.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: March 22, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toshiyuki Suzuma, Yoshiyuki Nakao, Makoto Sakamoto, Yoshiyuki Oota
  • Patent number: 8982756
    Abstract: An intermittent reception control apparatus controls intermittent reception in communication between a base station apparatus and mobile station apparatuses. The intermittent reception control apparatus comprising a control unit that generates DRX parameters, which are intermittent reception parameters, and transmits the generated DRX parameters to the mobile station apparatuses. Further, the DRX parameters include information on the timing at which to cause the mobile station apparatuses to enter an active state and are common to all of the mobile station apparatuses, where the active state is a state where reception of signals transmitted from the base station apparatus is enabled. The intermittent reception control apparatus further comprising a scheduler that transmits to the mobile station apparatuses a DRX command that operates to force these apparatuses to enter an inactive state.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: March 17, 2015
    Assignee: Fujitsu Limited
    Inventors: Toru Imamura, Kiyoshi Miyazawa, Yoshiyuki Oota, Syuuichi Okada, Hiroaki Takashima
  • Publication number: 20140137059
    Abstract: Plasma processing focus ring design arrangements, including: acquiring a surface voltage and a sheath thickness above a surface of the object to be processed, and a surface voltage and a sheath thickness above a surface of the focus ring, by an equivalent circuit analysis; performing 2D plasma and 2D electric field analysis, based on the equivalent circuit analysis; and designing configuration of the focus ring and the processing stage, to achieve a plasma-sheath interface flattening condition by making a sum of a height from a height reference point to a surface of the object and a sheath thickness from the surface of the object to a plasma-sheath interface above the object, equal to a sum of a height from the height reference point to a surface of the focus ring and a sheath thickness from the surface of the focus ring to a plasma-sheath interface above the focus ring.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 15, 2014
    Applicant: Hitachi High-Technologies Corporation
    Inventors: Ryoji NISHIO, Tadamitsu KANEKIYO, Yoshiyuki OOTA, Tsuyoshi MATSUMOTO
  • Patent number: 8632637
    Abstract: A plasma processing apparatus is disclosed for minimizing the non-uniformity of potential distribution around wafer circumference. The apparatus includes a focus ring formed of a dielectric, and a conductor or a semiconductor having RF applied thereto. A surface voltage of the focus ring is determined to be not less than a minimum voltage for preventing reaction products caused by wafer processing from depositing thereon. The surface height, surface voltage, material, and structure of the focus ring are optimized so that the height of an ion sheath formed on the focus ring surface is either equal or has a height difference within an appropriate tolerance range to the height of the ion sheath formed on the wafer surface.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: January 21, 2014
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ryoji Nishio, Tadamitsu Kanekiyo, Yoshiyuki Oota, Tsuyoshi Matsumoto
  • Patent number: 8588817
    Abstract: A wireless communication device includes an antenna unit that transmits and receives wireless signals, and one or more processors configured to conduct communication with a base station and control displacement of a service area of the base station and a service area of the wireless communication device in response to throughput characteristics of a cell formed by the base station.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: November 19, 2013
    Assignee: Fujitsu Limited
    Inventor: Yoshiyuki Oota
  • Publication number: 20130258924
    Abstract: An intermittent reception control apparatus controls intermittent reception in communication between a base station apparatus and mobile station apparatuses. Further, in the intermittent reception control apparatus, a control unit generates DRX parameters, which are intermittent reception parameters, and transmits the generated DRX parameters to the mobile station apparatuses. Further, the DRX parameters include information on the timing at which to cause the mobile station apparatuses to enter an active state and are common to all of the mobile station apparatuses, where the active state is a state where reception of signals transmitted from the base station apparatus is enabled. Further, the scheduler transmits to the mobile station apparatuses a DRX command that operates to force these apparatuses to enter an inactive state.
    Type: Application
    Filed: January 18, 2013
    Publication date: October 3, 2013
    Inventors: Toru IMAMURA, Kiyoshi MIYAZAWA, Yoshiyuki OOTA, Syuuichi OKADA, Hiroaki TAKASHIMA
  • Publication number: 20130258962
    Abstract: A base station apparatus operable to communicate by using any of a plurality of frequency bands, each of which includes a plurality of unit bands, the apparatus includes a determiner that determines a unit band to which to assign data, according to a priority of the data, to a maximum data transfer rate of the data, to a distance between the base station apparatus and a mobile station apparatus to which to send the data, or to a number or tried receptions of a preamble signal that has been sent from the mobile station apparatus through a random access channel, and a transmitter that sends the data by using the determined unit band.
    Type: Application
    Filed: March 13, 2013
    Publication date: October 3, 2013
    Applicant: FUJITSU LIMITED
    Inventor: Yoshiyuki OOTA
  • Patent number: 8503406
    Abstract: Radio communication equipment performs radio communication with a first radio terminal group in a first period by using a frequency commonly for use by an adjacent base station, and with a second radio terminal group in a second period by using a frequency not commonly for use by the adjacent base station. The radio communication equipment includes a control unit to adjust time allocation of the first period and the second period; and a radio communication unit to perform radio communication with the first radio terminal group and the second radio terminal group according to the time allocation adjusted by the control unit.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: August 6, 2013
    Assignee: Fujitsu Limited
    Inventor: Yoshiyuki Oota
  • Patent number: 8446853
    Abstract: Each mobile terminal apparatus measures receiving power or receiving quality of a signal received from a radio communication apparatus. If a plurality of mobile terminal apparatuses in which the receiving power or the receiving quality is lower than or equal to a determined threshold are detected, then a communication control apparatus selects a mobile terminal apparatus made to function as a relay station from the plurality of mobile terminal apparatuses detected on the basis of a result of measuring the receiving power or the receiving quality. The mobile terminal apparatus selected relays communication between the radio communication apparatus and a mobile terminal apparatus which does not function as a relay station.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: May 21, 2013
    Assignee: Fujitsu Limited
    Inventors: Masataka Umeda, Yoshiyuki Oota
  • Patent number: 8406700
    Abstract: A mobile station includes a reception quality generating unit that generates the reception quality based on a reception quality measured for data transmitted after transmission of a preamble signal. The mobile station is in a mobile communication system in which, a radio base station transmits the data after transmission of the preamble signal and, after transmission of a signal and before transmission of a subsequent preamble signal from the radio base station, the mobile station transmits to the radio base station, reception quality of the signal transmitted from the radio base station, whereby a transmission parameter for data transmitted to the mobile station after transmission of the subsequent preamble signal can be changed.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: March 26, 2013
    Assignee: Fujitsu Limited
    Inventor: Yoshiyuki Oota
  • Patent number: 8366870
    Abstract: The invention provides a plasma processing apparatus capable of minimizing the non-uniformity of potential distribution around wafer circumference, and providing a uniform process across the wafer surface. The apparatus is equipped with a focus ring formed of a dielectric, a conductor or a semiconductor and having RF applied thereto, the design of which is optimized for processing based on a design technique clarifying physical conditions for flattening a sheath-plasma interface above a wafer and the sheath-plasma interface above the focus ring. A surface voltage of the focus ring is determined to be not less than a minimum voltage for preventing reaction products caused by wafer processing from depositing thereon.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: February 5, 2013
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ryoji Nishio, Tadamitsu Kanekiyo, Yoshiyuki Oota, Tsuyoshi Matsumoto
  • Patent number: 8364096
    Abstract: For transmitting a common channel signal with characteristics with an approximated non-directivity, the common channel signal for all users is divided into sub-channel signals, corresponding to a number of antenna elements composing an array antenna, to be concurrently transmitted with non-directivity by using each antenna element. Individual channel signals, for each user, following the common channel signal with a desired directivity by using the antenna elements. Each sub-channel signal can be made a sub-channel signal obtained by dividing all sub-channel components composing the common channel signal for each sub-channel component by a predetermined number or dividing them depending on a receiving quality of each antenna element.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: January 29, 2013
    Assignee: Fujitsu Limited
    Inventors: Yoshiyuki Oota, Takanori Iwamatsu
  • Publication number: 20120258671
    Abstract: A base station includes a first communication section configured to communicate a wireless signal with the mobile station and another base station, a second communication section configured to communicate a data signal with a core network being connected to the base station, a wireless relay function section configured to perform first control to relay the wireless signal to be communicated with the other base station between the other base station and the mobile station, a communication function section configured to perform second control to convert between a data signal and a wireless signal, and to transmit the converted data signal and the converted wireless signal, and a selection control section configured to select at least one of the first control and the second control to use for communication with the mobile station, based on a reception level of the wireless signal from the other base station.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 11, 2012
    Applicant: FUJITSU LIMITED
    Inventor: Yoshiyuki OOTA
  • Patent number: 8249001
    Abstract: A base station assigns a subcarrier for downlink communications under Orthogonal Frequency Division Multiple Access. Before downlink communications with a mobile station, based on carrier sensing by the mobile station, the base station detects information concerning an available subcarrier from downlink signals using a modulating unit. The information concerning the available subcarrier is stored in a downlink-information sharing unit and is shared among the base station and the adjacent base stations. A downlink subcarrier setting unit sets the available subcarrier for downlink communications.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: August 21, 2012
    Assignee: Fujitsu Limited
    Inventors: Yoshiyuki Oota, Takanori Iwamatsu
  • Publication number: 20110319108
    Abstract: A wireless communication device includes an antenna unit that transmits and receives wireless signals, and one or more processors configured to conduct communication with a base station and control displacement of a service area of the base station and a service area of the wireless communication device in response to throughput characteristics of a cell formed by the base station.
    Type: Application
    Filed: June 16, 2011
    Publication date: December 29, 2011
    Applicant: FUJITSU LIMITED
    Inventor: Yoshiyuki OOTA
  • Patent number: 8057634
    Abstract: The invention provides a plasma processing apparatus capable of minimizing the non-uniformity of potential distribution around wafer circumference, and providing a uniform process across the wafer surface. The apparatus is equipped with a focus ring formed of a dielectric, a conductor or a semiconductor and having RF applied thereto, the design of which is optimized for processing based on a design technique clarifying physical conditions for flattening a sheath-plasma interface above a wafer and the sheath-plasma interface above the focus ring. A surface voltage of the focus ring is determined to be not less than a minimum voltage for preventing reaction products caused by wafer processing from depositing thereon.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: November 15, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Ryoji Nishio, Tadamitsu Kanekiyo, Yoshiyuki Oota, Tsuyoshi Matsumoto
  • Publication number: 20110209828
    Abstract: The invention provides a plasma processing apparatus capable of minimizing the non-uniformity of potential distribution around wafer circumference, and providing a uniform process across the wafer surface. The apparatus is equipped with a focus ring formed of a dielectric, a conductor or a semiconductor and having RF applied thereto, the design of which is optimized for processing based on a design technique clarifying physical conditions for flattening a sheath-plasma interface above a wafer and the sheath-plasma interface above the focus ring. A surface voltage of the focus ring is determined to be not less than a minimum voltage for preventing reaction products caused by wafer processing from depositing thereon.
    Type: Application
    Filed: May 9, 2011
    Publication date: September 1, 2011
    Inventors: Ryoji NISHIO, Tadamitsu Kanekiyo, Yoshiyuki Oota, Tsuyoshi Matsumoto
  • Publication number: 20110019606
    Abstract: Each mobile terminal apparatus measures receiving power or receiving quality of a signal received from a radio communication apparatus. If a plurality of mobile terminal apparatuses in which the receiving power or the receiving quality is lower than or equal to a determined threshold are detected, then a communication control apparatus selects a mobile terminal apparatus made to function as a relay station from the plurality of mobile terminal apparatuses detected on the basis of a result of measuring the receiving power or the receiving quality. The mobile terminal apparatus selected relays communication between the radio communication apparatus and a mobile terminal apparatus which does not function as a relay station.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 27, 2011
    Applicant: FUJITSU LIMITED
    Inventors: Masataka UMEDA, Yoshiyuki Oota
  • Publication number: 20100302962
    Abstract: A wireless communication method for performing wireless communications between a wireless terminal and a wireless base station during a first time period or a second time period includes determining whether the first time period or the second time period is assigned to the wireless terminal, measuring a quality of a signal to be transmitted during the determined first or second time period, selecting either the first time period or the second time period according to the measured quality of the signal, and reporting selection data indicating the selected first or second time period or reporting measurement data indicating the measured quality of the signal to the wireless base station.
    Type: Application
    Filed: April 28, 2010
    Publication date: December 2, 2010
    Applicant: FUJITSU LIMITED
    Inventor: Yoshiyuki OOTA
  • Publication number: 20100167773
    Abstract: A mobile station includes a reception quality generating unit that generates the reception quality based on a reception quality measured for data transmitted after transmission of a preamble signal. The mobile station is in a mobile communication system in which, a radio base station transmits the data after transmission of the preamble signal and, after transmission of a signal and before transmission of a subsequent preamble signal from the radio base station, the mobile station transmits to the radio base station, reception quality of the signal transmitted from the radio base station, whereby a transmission parameter for data transmitted to the mobile station after transmission of the subsequent preamble signal can be changed.
    Type: Application
    Filed: March 15, 2010
    Publication date: July 1, 2010
    Applicant: FUJITSU LIMITED
    Inventor: Yoshiyuki Oota