Patents by Inventor Tatsuro Masamura

Tatsuro Masamura 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: 8379577
    Abstract: A wireless resource assigning apparatus for assigning wireless resources to transmission data of a plurality of users is disclosed. The wireless resource assigning apparatus includes a scheduling part configured to start scheduling for all users from a first wireless resource among a plurality of wireless resources prioritized according to a predetermined criterion, and repeat scheduling up to the last wireless resource for users except for users to whom any wireless resource has been assigned.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: February 19, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Masashige Shirakabe, Naoto Matoba, Takatoshi Sugiyama, Hitoshi Yoshino, Tatsuro Masamura
  • Patent number: 7564699
    Abstract: A planar circuit housing (300) for containing a planar circuit (120) is disclosed. The planar circuit housing (300) comprises a support portion (341) for supporting edges of the planar circuit (120), the support portion (341) being provided on at least one housing internal surface substantially perpendicular to the planar circuit substrate (120); an upper cavity (380) in the housing (300) above the planar circuit (120); and a lower cavity (382) in the housing (300) below the planar circuit (120), the lower cavity (382) having the same sizes as the upper cavity (380) in directions parallel with the planar circuit substrate (120).
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: July 21, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Daisuke Koizumi, Kei Satoh, Shoichi Narahashi, Tatsuro Masamura
  • Patent number: 7280833
    Abstract: An object of the present invention is to enable appropriate switching among a plurality of modes including a cellular communication mode and an RFID information receiving function. A communication system is comprised of an RFID configured to transmit predetermined ID information of its own, a server capable of being connected to a cellular communication network, and an aggregation point for aggregating information from the RFID. In the communication system, the aggregation point, which is comprised of a mobile communication terminal or the like, is provided with an ID receiver for receiving ID information from an RFID, and a cellular communication part for performing cellular communication via the cellular communication network.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: October 9, 2007
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hirohito Suda, Shinzo Ohkubo, Tatsuro Masamura, Toshiaki Tanaka, Mitsuru Murata
  • Publication number: 20070223202
    Abstract: A planar circuit housing (300) for containing a planar circuit (120) is disclosed. The planar circuit housing (300) comprises a support portion (341) for supporting edges of the planar circuit (120), the support portion (341) being provided on at least one housing internal surface substantially perpendicular to the planar circuit substrate (120); an upper cavity (380) in the housing (300) above the planar circuit (120); and a lower cavity (382) in the housing (300) below the planar circuit (120), the lower cavity (382) having the same sizes as the upper cavity (380) in directions parallel with the planar circuit substrate (120).
    Type: Application
    Filed: September 19, 2005
    Publication date: September 27, 2007
    Applicant: NTT DoCoMo, Inc.
    Inventors: Daisuke Koizumi, Kei Satoh, Shoichi Narahashi, Tatsuro Masamura
  • Publication number: 20060203723
    Abstract: A wireless resource assigning apparatus for assigning wireless resources to transmission data of a plurality of users is disclosed. The wireless resource assigning apparatus includes a scheduling part configured to start scheduling for all users from a first wireless resource among a plurality of wireless resources prioritized according to a predetermined criterion, and repeat scheduling up to the last wireless resource for users except for users to whom any wireless resource has been assigned.
    Type: Application
    Filed: February 24, 2006
    Publication date: September 14, 2006
    Applicant: NTT DoCoMo, Inc.
    Inventors: Masashige Shirakabe, Naoto Matoba, Takatoshi Sugiyama, Hitoshi Yoshino, Tatsuro Masamura
  • Publication number: 20040171373
    Abstract: An object of the present invention is to enable appropriate switching among a plurality of modes including a cellular communication mode and an RFID information receiving function. A communication system is comprised of an RFID configured to transmit predetermined ID information of its own, a server capable of being connected to a cellular communication network, and an aggregation point for aggregating information from the RFID. In the communication system, the aggregation point, which is comprised of a mobile communication terminal or the like, is provided with an ID receiver for receiving ID information from an RFID, and a cellular communication part for performing cellular communication via the cellular communication network.
    Type: Application
    Filed: December 10, 2003
    Publication date: September 2, 2004
    Applicant: NTT DoCoMo, Inc.
    Inventors: Hirohito Suda, Shinzo Ohkubo, Tatsuro Masamura, Toshiaki Tanaka, Mitsuru Murata
  • Patent number: 4715048
    Abstract: A diversity receiving system for differential detection of minimum shift key (MSK) signals. The system may be advantageously implemented in order to realize high quality mobile satellite communication systems where shadowing is a significant problem and channel bandwidth and power are constrained. Signals from each of a plurality of receiving branches are translated to different intermediate frequencies which differ from each other by multiples of the transmitted signal symbol rate. The intermediate frequency signals are summed and detected via a common differential detector, the latter being followed by a low pass filter having a bandwidth corresponding to a fraction of the symbol rate. The plural signals are easily and stabely combined at an intermediate frequency stage without phase adjusters, signal quality measurement circuits or switching controllers.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: December 22, 1987
    Assignee: Canadian Patents And Development Limited
    Inventor: Tatsuro Masamura
  • Patent number: 4554672
    Abstract: An improved oscillator which can adjust phase and frequency of the output signal independently from each other without time delay is disclosed. The oscillator is used for instance as a clock signal generator in a TDMA satellite communication system. The oscillator (FIG. 3) comprises a fixed oscillator (13) for providing a fixed frequency signal, a quadrature hybrid circuit (14) for providing a pair of quadrature phased signals from the output of said fixed oscillator (13), a control signal generator (17) for providing a pair of quadrature phased signals which satisfy b cos (2.pi..DELTA.f.sub.D t+.DELTA..phi..sub.D) and b sin (2.pi..DELTA.f.sub.D t+.DELTA..phi..sub.D), where b is a constant, .DELTA.f.sub.D is a desired frequency change, and .DELTA..phi..sub.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: November 19, 1985
    Assignee: Nippon Telegraph & Telephone Public Corp.
    Inventors: Tatsuro Masamura, Masahiro Morikura, Takayoshi Maki