Patents by Inventor Takao Shikama

Takao Shikama 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: 11934022
    Abstract: A photoelectric fiber includes a fiber including a core through which light is guided; an electrical unit formed continuously with the fiber, the electrical unit being configured to house a photoelectric conversion chip including a photoelectric conversion element; and an external electrode formed on a front surface of at least one of the fiber or the electrical unit, wherein the photoelectric conversion chip is optically connected to the core and electrically connected to the external electrode.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: March 19, 2024
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Norio Sato, Atsushi Aratake, Makoto Abe, Takuya Tanaka, Kota Shikama, Takao Fukumitsu, Hiroshi Ishikawa
  • Patent number: 9723579
    Abstract: A traffic data integration method includes: obtaining, by using a computer, pieces of frame data having a same data pattern between first and second traffic data collected respectively by first and second capture devices that capture, as traffic data, frame data communicated by a node in a network; performing, by using the computer, a time correction process by which a time of each piece of frame data in the first and second traffic data is corrected so that capturing times of pieces of obtained frame data are identical; using, by using the computer, frame data for which a same data pattern does not appear repeatedly in a same capture device, as frame data for performing the time correction process; and restricting, by using the computer, a time difference of frame data used when the time correction process is performed.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: August 1, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Koutarou Chihara, Harutaka Tanaka, Wataru Nakamura, Takao Shikama
  • Patent number: 9485739
    Abstract: An interference control method including: receiving actual reception qualities of wireless signals that are measured by a wireless terminal, each of the wireless signals being sent from each of base stations, estimating future reception qualities after a specified period based on the actual reception qualities, estimating, for each of combinations of transmission powers of the base stations, corresponding interference based on the future reception qualities, and setting each of transmission powers of the base stations based on one of the combinations of transmission powers that is selected based on the corresponding interference.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: November 1, 2016
    Assignee: FUJITSU LIMITED
    Inventor: Takao Shikama
  • Publication number: 20150009839
    Abstract: An interference control method including: receiving actual reception qualities of wireless signals that are measured by a wireless terminal, each of the wireless signals being sent from each of base stations, estimating future reception qualities after a specified period based on the actual reception qualities, estimating, for each of combinations of transmission powers of the base stations, corresponding interference based on the future reception qualities, and setting each of transmission powers of the base stations based on one of the combinations of transmission powers that is selected based on the corresponding interference.
    Type: Application
    Filed: June 30, 2014
    Publication date: January 8, 2015
    Inventor: Takao SHIKAMA
  • Publication number: 20130297820
    Abstract: A traffic data integration method includes: obtaining, by using a computer, pieces of frame data having a same data pattern between first and second traffic data collected respectively by first and second capture devices that capture, as traffic data, frame data communicated by a node in a network; performing, by using the computer, a time correction process by which a time of each piece of frame data in the first and second traffic data is corrected so that capturing times of pieces of obtained frame data are identical; using, by using the computer, frame data for which a same data pattern does not appear repeatedly in a same capture device, as frame data for performing the time correction process; and restricting, by using the computer, a time difference of frame data used when the time correction process is performed.
    Type: Application
    Filed: July 8, 2013
    Publication date: November 7, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Koutarou CHIHARA, Harutaka TANAKA, Wataru NAKAMURA, TAKAO SHIKAMA
  • Patent number: 7392062
    Abstract: A mobile radio communication system is provided for keeping high-quality communications and preventing disconnection of a radio link in fast movement. The system includes the radio network controller provided with a storage unit and a control unit. The storage unit stores grouped-user-equipments management information to be used for identifying and managing a plurality of user equipments as one group. The control unit controls the user equipments belonging to the same group so that they may be connected with their respective ones of the cells formed by the node bases. This allows the plurality of user equipments belonging to the same group to execute multiplex communications, thereby preventing simultaneous disconnection of the radio links of the user equipments belonging to the same group even when those user equipments are moving fast.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: June 24, 2008
    Assignee: Fujitsu Limited
    Inventors: Koji Kuriki, Shigehiko Hirata, Shogo Matsuoka, Takao Shikama
  • Publication number: 20080146237
    Abstract: In a radio network control method and device which avoid a congestion state by controlling a handover request when a transportable base station is moving, when location information is received from the transportable base station, enable/disable of a handover between the transportable base station and another base station is determined based on the location information and preset handover information per area. When handover enable is determined, information of a peripheral cell which allows a handover to the other base station is notified to a user equipment using a cell of the transportable base station based on in-use cell information per user equipment. Alternatively, information of a peripheral cell which allows a handover to the transportable base station is notified to a user equipment using a cell of a base station to which the transportable base station has moved.
    Type: Application
    Filed: November 15, 2007
    Publication date: June 19, 2008
    Inventors: Takao Shikama, Fumikiyo Kikukawa, Kazuya Nishimura, Hidehiko Satoh, Yoshifumi Mori
  • Publication number: 20060073849
    Abstract: A mobile radio communication system is provided for keeping high-quality communications and preventing disconnection of a radio link in fast movement. The system includes the radio network controller provided with a storage unit and a control unit. The storage unit stores grouped-user-equipments management information to be used for identifying and managing a plurality of user equipments as one group. The control unit controls the user equipments belonging to the same group so that they may be connected with their respective ones of the cells formed by the node bases. This allows the plurality of user equipments belonging to the same group to execute multiplex communications, thereby preventing simultaneous disconnection of the radio links of the user equipments belonging to the same group even when those user equipments are moving fast.
    Type: Application
    Filed: December 8, 2004
    Publication date: April 6, 2006
    Inventors: Koji Kuriki, Shigehiko Hirata, Shogo Matsuoka, Takao Shikama
  • Patent number: 6865182
    Abstract: In a data transfer method and apparatus of the present invention, multiple data frames are received from a preceding node of a network of communication units, and the received data frames are routed to a next node of the network. It is detected whether each of the multiple data frames is addressed to another communication unit. It is detected whether the data frames that are detected as being addressed to another communication unit contain identical messages. The data frames that are detected as containing different destinations and identical messages are assembled into an integrated data frame, so that the integrated data frame is transmitted to the next node. A selected next-node equipment identifier is supplied, which indicates a selected next-node communication unit of the network that receives the integrated data frame.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: March 8, 2005
    Assignee: Fujitsu Limited
    Inventors: Hironori Ochiai, Yuji Ito, Akinori Kubota, Yasuhide Tsuru, Masahiro Hayashi, Takao Shikama
  • Patent number: 6552737
    Abstract: A device for controlling multi-window display on a screen includes a screen-operation detecting unit which detects user screen operations including a user operation of a pointer on the screen. The device further includes a control unit which controls a window to increase an amount of information displayed therein when said screen-operation detecting unit detects a move of the pointer into an area of the window.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: April 22, 2003
    Assignee: Fujitsu Limited
    Inventors: Harutaka Tanaka, Shuji Iwasaki, Takao Shikama, Yoshito Taniyama, Yoshimasa Sekiya, Hirofumi Kobayashi, Koji Mikami, Masayoshi Kamada, Shinichi Tabe
  • Publication number: 20020019878
    Abstract: In a data transfer method and apparatus of the present invention, multiple data frames are received from a preceding node of a network of communication units, and the received data frames are routed to a next node of the network. It is detected whether each of the multiple data frames is addressed to another communication unit. It is detected whether the data frames that are detected as being addressed to another communication unit contain identical messages. The data frames that are detected as containing different destinations and identical messages are assembled into an integrated data frame, so that the integrated data frame is transmitted to the next node. A selected next-node equipment identifier is supplied, which indicates a selected next-node communication unit of the network that receives the integrated data frame.
    Type: Application
    Filed: March 26, 2001
    Publication date: February 14, 2002
    Inventors: Hironori Ochiai, Yuji Ito, Akinori Kubota, Yasuhide Tsuru, Masahiro Hayashi, Takao Shikama