Patents by Inventor Takeshi Toda

Takeshi Toda 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: 8224331
    Abstract: The present invention relates to a cell search method for a multiband radio communication system including a mobile station and multiple base stations.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: July 17, 2012
    Assignee: Kyocera Corporation
    Inventors: Takeshi Toda, Taku Nakayama, Shingo Joko, Chiharu Yamazaki
  • Patent number: 8219039
    Abstract: A radio communication device according to the present invention adaptively controls directivity of a transmission radio signal by using a plurality of element antennas on the basis of a received radio signal received from a communication target counterpart radio communication device. The radio communication device includes a transmission controller configured to process the transmission radio signal according to a first control method for adaptively controlling the directivity, a propagation path state detector configured to detect fluctuation state of a propagation path to a counterpart radio communication device, and a judgment unit configured to judge whether or not to change the directivity on the basis of the fluctuation state of the propagation path. If it is judged that the directivity is to be changed, the transmission controller switches to a second control method that is different from the first control method, and processes the transmission radio signal according to the second control method.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: July 10, 2012
    Assignee: Kyocera Corporation
    Inventors: Chiharu Yamazaki, Shigeru Kimura, Takeshi Toda, Kenta Okino
  • Patent number: 8208859
    Abstract: A radio communication device according to the present invention is a radio communication device which adaptively controls directivity of transmission radio signals by use of a plurality of element antennas on the basis of received radio signals received from a counterpart radio communication device that is a communication target radio communication device, the transmission radio signals being to be transmitted to the counterpart radio communication device, the radio communication device comprising: a propagation path state detector configured to detect a fluctuation state of a propagation path to the counterpart radio communication device on the basis of the received radio signal; and a transmission controller configured to control a phase of the transmission radio signal on the basis of the fluctuation state of the propagation path detected by the propagation path state detector.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: June 26, 2012
    Assignee: Kyocera Corporation
    Inventors: Chiharu Yamazaki, Shigeru Kimura, Takeshi Toda, Kenta Okino
  • Publication number: 20120015495
    Abstract: A method of manufacturing a semiconductor device includes forming a first insulating film above a semiconductor substrate, forming a wiring to be buried in the first insulating film, forming a protruding portion in an upper surface of the wiring, forming a second insulating film above the first insulating film and the wiring including the protruding portion, planarizing a surface of the second insulating film, forming a third insulating film on the second insulating film whose surface is planarized, forming a lower electrode on the third insulating film, forming a capacitor insulating film on the lower electrode, and forming an upper electrode on the capacitor insulating film.
    Type: Application
    Filed: September 24, 2011
    Publication date: January 19, 2012
    Applicant: RENESAS ELECTRONIC CORPORATION
    Inventors: Masayuki Furumiya, Takeshi Toda
  • Patent number: 8039924
    Abstract: A semiconductor device includes a first wiring layer which is provided above a semiconductor substrate and includes a first insulating film and a wiring buried in the first insulating film, a second insulating film provided above the first wiring layer, a third insulating film provided on the second insulating film, and a capacitor element provided on the third insulating film. The wiring includes an upper surface having a protruding portion. The capacitor element includes a lower electrode provided on the third insulating film, a capacitor insulating film provided on the lower electrode, and an upper electrode provided on the capacitor insulating film.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: October 18, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Masayuki Furumiya, Takeshi Toda
  • Publication number: 20100285811
    Abstract: Even when being located at cell edge in a multiband mobile communication system, a radio communication terminal, is allowed to stably execute cell search so as to easily establish a connection with a radio base station. The radio communication terminal according to the present invention includes: a first determination unit 13 configured to determine whether or not a broadcast map can be received from a plurality of radio base stations; a second determination unit 14 configured to determine whether or not an AAS diversity map can be received trom the radio base stations in ascending order of used frequency bands, when it is determined that the broadcast map cannot be received; and a communication controller 15 configured to select a radio base station, which is determined to be a radio base station from which the AAS diversity map can be received, as a connection destination radio base station, and to communicate with the selected radio base station.
    Type: Application
    Filed: November 29, 2007
    Publication date: November 11, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Takeshi TODA, Taku NAKAYAMA, Shingo JOKO
  • Publication number: 20100197303
    Abstract: The radio commutation terminal (200) receives an AAS-DLFP which is transmitted by using a specific region and is associated with the control information, when the control information transmitted by using a map region is cannot toe received. The radio communication terminal (200) transmits a ranging code to a radio base station (100) to notify the reception of the AAS-DLFP, when the AAS-DLFP is received. The radio base station (100) transmits a private map for the radio communication terminal (200) to the radio communication terminal (200) toy a directional beam, when the ranging code is received from the radio communication terminal (200).
    Type: Application
    Filed: February 20, 2008
    Publication date: August 5, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Shingo Joko, Takeshi Toda, Taku Nakayama
  • Publication number: 20100183099
    Abstract: When receiving a signal from the antenna #1 (initially receiving a signal from an omnidirectional antenna), a guard interval correlator 12 calculates correlation of a guard interval portion of the received signal and an output measuring unit 13 measures a peak output of the guard interval correlator 12. A comparator 14 compares the peak output measured by the output measuring unit 13 with a preset threshold, and when the peak output falls below the preset threshold and outputs an antenna switching control signal to an antenna switch 11, and the antenna switch 11 switches to the antenna #2 having a different directivity.
    Type: Application
    Filed: April 24, 2008
    Publication date: July 22, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Takeshi Toda, Kenta Okino, Taku Nakayama, Tadashi Yamazaki
  • Publication number: 20100173592
    Abstract: A radio communication device according to the present invention adaptively controls directivity of a transmission radio signal by using a plurality of element antennas on the basis of a received radio signal received from a communication target counterpart radio communication device. The radio communication device includes a transmission controller configured to process the transmission radio signal according to a first control method for adaptively controlling the directivity, a propagation path state detector configured to detect fluctuation state of a propagation path to a counterpart radio communication device, and a judgment unit configured to judge whether or not to change the directivity on the basis of the fluctuation state of the propagation path. If it is judged that the directivity is to be changed, the transmission controller switches to a second control method that is different from the first control method, and processes the transmission radio signal according to the second control method.
    Type: Application
    Filed: September 20, 2007
    Publication date: July 8, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Chiharu Yamazaki, Shigeru Kimura, Takeshi Toda, Kenta Okino
  • Publication number: 20100159844
    Abstract: A radio communication device according to the present invention is a radio communication device which adaptively controls directivity of transmission radio signals by use of a plurality of element antennas on the basis of received radio signals received from a counterpart radio communication device that is a communication target radio communication device, the transmission radio signals being to be transmitted to the counterpart radio communication device, the radio communication device comprising: a propagation path state detector configured to detect a fluctuation state of a propagation path to the counterpart radio communication device on the basis of the received radio signal; and a transmission controller configured to control a phase of the transmission radio signal on the basis of the fluctuation state of the propagation path detected by the propagation path state detector.
    Type: Application
    Filed: September 20, 2007
    Publication date: June 24, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Chiharu Yamazaki, Shigeru Kimura, Takeshi Toda, Kenta Okino
  • Publication number: 20100159927
    Abstract: The present invention relates to a cell search method for a multiband radio communication system including a mobile station and multiple base stations.
    Type: Application
    Filed: September 26, 2007
    Publication date: June 24, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Takeshi Toda, Taku Nakayama, Shingo Joko, Chiharu Yamazaki
  • Publication number: 20100150083
    Abstract: A radio base station includes: a propagation path characteristic acquisition unit which acquires propagation path characteristics between a radio communication terminal and a radio base station; and a channel controller which reports to the radio communication terminal that channel allocation information is transmitted by using a dedicated control channel if the acquired propagation characteristic satisfies a predetermined condition. After the channel control unit has reported to the radio communication terminal that the channel allocation information is transmitted by using an dedicated control channel, the channel control unit and a MAP processing unit transmit the channel allocation information by using an dedicated control channel instead of a broadcast control channel in the downstream frame.
    Type: Application
    Filed: February 20, 2008
    Publication date: June 17, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Takeshi Toda, Shingo Joko, Taku Nakayama, Kenta Okino, Chiharu Yamazaki
  • Publication number: 20100150084
    Abstract: A radio base station (100A) transmits channel allocation information to a radio communication terminal by using a downward frame containing a map region which is broadcast by a non-directivity beam and a particular region transmitted toward a predetermined direction by a directivity beam. The radio base station (100A) includes: a traffic state acquisition unit (105) which acquires the traffic state handled by a mobile communication system (1); and a frame control unit (107) which changes the size of the particular region in the downward frame according to the traffic state obtained by the traffic state acquisition unit (105).
    Type: Application
    Filed: February 20, 2008
    Publication date: June 17, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Shingo Joko, Takeshi Toda, Taku Nakayama
  • Publication number: 20100151798
    Abstract: A radio base station 100 includes fading rate measurement units 103a to 103n configured to measure a fading rate of a radio signal for each of the antenna elements 101a to 101n, the radio signal being received through the antenna elements; and a reference signal calculator 105 configured to output a reference signal used in an adaptive control of the directivity of the array antenna 101. The reference signal calculator 105 outputs the reference signal on the basis of a plurality of fading rates measured by the fading rate measurement units 103a to 103n.
    Type: Application
    Filed: April 25, 2008
    Publication date: June 17, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Kenta Okino, Takeshi Toda, Chiharu Yamazaki
  • Publication number: 20100142441
    Abstract: Provided is a radio communication method employed in a base station having plural antenna elements. The method includes the steps of: setting an inner zone and an outer zone by dividing a cell formed by the base station into two; determining whether a mobile station is located in the inner zone or the outer zone on the basis of a predetermined criterion; notifying the mobile station located in the inner zone of control information, including information on channel allocation and a communication method, through a broadcast channel; and notifying the mobile station located in the outer zone of control information through a dedicated channel by beamforming using the plural antenna elements.
    Type: Application
    Filed: October 23, 2007
    Publication date: June 10, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Takeshi Toda, Shingo Joko, Taku Nakayama, Kenta Okino
  • Patent number: 7732895
    Abstract: In a semiconductor device, a plurality of triple-stacked structures all having the same structure are provided. Each of the triple-stacked structures includes one lower electrode layer, at least one upper electrode layer and one dielectric layer sandwiched by the lower electrode layer and the upper electrode layer.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: June 8, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Takeshi Toda
  • Publication number: 20100113002
    Abstract: The present invention is a radio communication method using a first radio base station and a second radio base station located adjacent to the first radio base station and including an adaptive array antenna for radiating a dynamic directional beam, the method including the steps of: acquiring moving speed of a radio communication terminal located in a cell formed by the first radio base station; requesting the second radio base station to radiate the directional beam in a direction of the cell formed by the first radio base station when the moving speed is equal to or more than a predetermined threshold; and accommodating the radio communication terminal in the second radio base station that has transmitted the directional beam in response to the request.
    Type: Application
    Filed: July 27, 2007
    Publication date: May 6, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Shingo Joko, Takeshi Toda, Taku Nakayama
  • Publication number: 20100046680
    Abstract: A communication device according to the present invention includes a receiver configured to receive, through a radio link, packet signals each including a known signal indicating information known by the communication device and an unknown signal indicating information not known by the communication device, and a combiner configured to combine the packet signals while decreasing noise signals included in each of the packet signals. The communication device includes a correlation comparator configured to compare a correlation between the known signals in each of the packet signals with a correlation between the unknown signals in each of the packet signals, and a combining scheme controller configured to control a scheme of combining the packet signals, on the basis of the comparison result by the correlation comparator.
    Type: Application
    Filed: August 23, 2007
    Publication date: February 25, 2010
    Applicant: KYOCERA CORPORATION
    Inventors: Kenta Okino, Takeshi Toda
  • Patent number: 7633138
    Abstract: The semiconductor device 1 includes an insulating interlayer 10, interconnects 12a to 12c, an insulating interlayer 20, and a capacitor element 30. On the insulating interlayer 10 and the interconnects 12a to 12d, the insulating interlayer 20 is provided via a diffusion barrier 40. On the insulating interlayer 20, the capacitor element 30 is provided. The capacitor element 30 is a MIM type capacitor element, and includes a lower electrode 32 provided on the insulating interlayer 20, a capacitor insulating layer 34 provided on the lower electrode 32, and an upper electrode 36 provided on the capacitor insulating layer 34. The interface S1 between the insulating interlayer 20 and the capacitor element 30 is generally flat. The lower face S2 of the insulating interlayer 20 includes an uneven portion at a position corresponding to the capacitor insulating layer 34.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: December 15, 2009
    Assignee: NEC Electronics Corporation
    Inventors: Toshiyuki Takewaki, Takeshi Toda
  • Patent number: 7512384
    Abstract: A control unit and a control method are disclosed. First and second changing units change impedances of two or more first and second components within predetermined first and second ranges, respectively, the first and the second components affecting an output signal. An evaluation function value calculating unit calculates an evaluation function value that is dependent on the impedances of the first and the second components. A gradient vector calculating unit calculates a gradient vector based on the difference between the evaluation function values before and after the impedance change of the second components. Based on the gradient vector, impedance of each of the first components is changed such that the evaluation function value takes a desired value.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: March 31, 2009
    Assignee: Fujitsu Limited
    Inventors: Takeshi Toda, Takeshi Takano, Yuuta Nakaya, Yasuyuki Oishi