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).
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Patent number: 11934022Abstract: 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: GrantFiled: July 18, 2019Date of Patent: March 19, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Norio Sato, Atsushi Aratake, Makoto Abe, Takuya Tanaka, Kota Shikama, Takao Fukumitsu, Hiroshi Ishikawa
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Patent number: 9723579Abstract: 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: GrantFiled: July 8, 2013Date of Patent: August 1, 2017Assignee: FUJITSU LIMITEDInventors: Koutarou Chihara, Harutaka Tanaka, Wataru Nakamura, Takao Shikama
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Patent number: 9485739Abstract: 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: GrantFiled: June 30, 2014Date of Patent: November 1, 2016Assignee: FUJITSU LIMITEDInventor: Takao Shikama
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Publication number: 20150009839Abstract: 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: ApplicationFiled: June 30, 2014Publication date: January 8, 2015Inventor: Takao SHIKAMA
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Publication number: 20130297820Abstract: 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: ApplicationFiled: July 8, 2013Publication date: November 7, 2013Applicant: FUJITSU LIMITEDInventors: Koutarou CHIHARA, Harutaka TANAKA, Wataru NAKAMURA, TAKAO SHIKAMA
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Patent number: 7392062Abstract: 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: GrantFiled: December 8, 2004Date of Patent: June 24, 2008Assignee: Fujitsu LimitedInventors: Koji Kuriki, Shigehiko Hirata, Shogo Matsuoka, Takao Shikama
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Publication number: 20080146237Abstract: 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: ApplicationFiled: November 15, 2007Publication date: June 19, 2008Inventors: Takao Shikama, Fumikiyo Kikukawa, Kazuya Nishimura, Hidehiko Satoh, Yoshifumi Mori
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Publication number: 20060073849Abstract: 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: ApplicationFiled: December 8, 2004Publication date: April 6, 2006Inventors: Koji Kuriki, Shigehiko Hirata, Shogo Matsuoka, Takao Shikama
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Patent number: 6865182Abstract: 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: GrantFiled: March 26, 2001Date of Patent: March 8, 2005Assignee: Fujitsu LimitedInventors: Hironori Ochiai, Yuji Ito, Akinori Kubota, Yasuhide Tsuru, Masahiro Hayashi, Takao Shikama
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Patent number: 6552737Abstract: 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: GrantFiled: September 1, 1999Date of Patent: April 22, 2003Assignee: Fujitsu LimitedInventors: Harutaka Tanaka, Shuji Iwasaki, Takao Shikama, Yoshito Taniyama, Yoshimasa Sekiya, Hirofumi Kobayashi, Koji Mikami, Masayoshi Kamada, Shinichi Tabe
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Publication number: 20020019878Abstract: 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: ApplicationFiled: March 26, 2001Publication date: February 14, 2002Inventors: Hironori Ochiai, Yuji Ito, Akinori Kubota, Yasuhide Tsuru, Masahiro Hayashi, Takao Shikama