Patents by Inventor Youichi Fukada
Youichi Fukada 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: 11616661Abstract: A transfer device for coupling a priority signal and a standard signal and transferring the signal includes a reception unit that receives a plurality of signals transmitted from a device connected to an opposite side of a transfer route, a separation unit that separates the signal into the priority signal and the standard signal, a signal defragmentation unit that defragments the plurality of standard signals, a multiplexing unit that multiplexes each of the priority signal and the standard signal, a priority control unit that determines a transfer order of the signals, a header information copy unit that copy header information of the standard signal, a transmission unit that transmits the signal to a device connected to the transfer route, an interrupt transfer processing unit that perform an interruption process when the priority signal arrives during the transfer of the standard signal, a signal fragmentation unit that fragments the standard signal, a header information assignment unit that assigns the hType: GrantFiled: February 1, 2019Date of Patent: March 28, 2023Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisuke Hisano, Yu Nakayama, Takahiro Kubo, Youichi Fukada
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Patent number: 11201825Abstract: A transfer device for coupling a priority signal and a standard signal includes a reception unit configured to receive a plurality of signals transmitted from a device connected to a path different from a forwarding path, a separation unit configured to separate the signals into the priority signal and the standard signal, an identifier reference unit configured to reference an identifier added to the standard signal, an identifier sort unit configured to sort the standard signal by the identifier, a signal coupling unit configured to couple the plurality of standard signals, a multiplexing unit configured to multiplex the priority signal and the standard signal, a priority control unit configured to determine a transfer order of the signals, a transmission unit configured to transmit the signals to a device connected to the forwarding path, an interrupt transfer processing unit configured to perform interrupt processing in a case where the priority signal arrives during transfer of the standard signal, a sigType: GrantFiled: February 1, 2019Date of Patent: December 14, 2021Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisuke Hisano, Yu Nakayama, Takahiro Kubo, Youichi Fukada
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Patent number: 11150353Abstract: A time synchronization method that is capable of selecting whether synchronization, by a timepiece unit that generates a time signal synchronized with a standard time and outputs it to an exterior, with the time is performed by time information obtained by receiving a radio wave including information relating to the time, or is performed by means of a holdover performed using a clock signal from an internal or external clock source. A schedule having a first time period in which the above-mentioned time information is used, and a second time period by means of the holdover is determined according to temporal reception characteristics of the radio wave at a reception location of the radio wave, and according to the schedule, supplying the timepiece unit with the time information or supplying the timepiece unit with the clock signal from the internal or external clock source.Type: GrantFiled: February 12, 2016Date of Patent: October 19, 2021Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Keisuke Nishi, Youichi Fukada, Akihiro Morita, Seiji Yoshida, Takashi Hirose
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Publication number: 20210083982Abstract: A transfer device for coupling a priority signal and a standard signal includes a reception unit configured to receive a plurality of signals transmitted from a device connected to a path different from a forwarding path, a separation unit configured to separate the signals into the priority signal and the standard signal, an identifier reference unit configured to reference an identifier added to the standard signal, an identifier sort unit configured to sort the standard signal by the identifier, a signal coupling unit configured to couple the plurality of standard signals, a multiplexing unit configured to multiplex the priority signal and the standard signal, a priority control unit configured to determine a transfer order of the signals, a transmission unit configured to transmit the signals to a device connected to the forwarding path, an interrupt transfer processing unit configured to perform interrupt processing in a case where the priority signal arrives during transfer of the standard signal, a sigType: ApplicationFiled: February 1, 2019Publication date: March 18, 2021Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisuke HISANO, Yu NAKAYAMA, Takahiro KUBO, Youichi FUKADA
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Publication number: 20210036885Abstract: A transfer device for coupling a priority signal and a standard signal and transferring the signal includes a reception unit that receives a plurality of signals transmitted from a device connected to an opposite side of a transfer route, a separation unit that separates the signal into the priority signal and the standard signal, a signal defragmentation unit that defragments the plurality of standard signals, a multiplexing unit that multiplexes each of the priority signal and the standard signal, a priority control unit that determines a transfer order of the signals, a header information copy unit that copy header information of the standard signal, a transmission unit that transmits the signal to a device connected to the transfer route, an interrupt transfer processing unit that perform an interruption process when the priority signal arrives during the transfer of the standard signal, a signal fragmentation unit that fragments the standard signal, a header information assignment unit that assigns the hType: ApplicationFiled: February 1, 2019Publication date: February 4, 2021Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Daisuke HISANO, Yu NAKAYAMA, Takahiro KUBO, Youichi FUKADA
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Patent number: 10520605Abstract: A satellite signal reception characteristic estimation apparatus includes a satellite orbital information collection unit that collects and outputs orbital information for a satellite; a peripheral environment spatial information collection unit that collects spatial information for a peripheral environment of an installation position of a satellite antenna; a positional information collection unit that collects and outputs positional information for the installation position of the satellite antenna; and a simulation server unit that estimates reception characteristics of satellite signals at the installation position of the satellite antenna by performing a simulation based on the orbital information, the spatial information, and the positional information outputted from the satellite orbital information collection unit, the peripheral environment spatial information collection unit, and the positional information collection unit.Type: GrantFiled: February 12, 2016Date of Patent: December 31, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Keisuke Nishi, Youichi Fukada, Akihiro Morita, Seiji Yoshida, Takashi Hirose
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Publication number: 20180024250Abstract: A satellite signal reception characteristic estimation apparatus includes a satellite orbital information collection unit that collects and outputs orbital information for a satellite; a peripheral environment spatial information collection unit that collects spatial information for a peripheral environment of an installation position of a satellite antenna; a positional information collection unit that collects and outputs positional information for the installation position of the satellite antenna; and a simulation server unit that estimates reception characteristics of satellite signals at the installation position of the satellite antenna by performing a simulation based on the orbital information, the spatial information, and the positional information outputted from the satellite orbital information collection unit, the peripheral environment spatial information collection unit, and the positional information collection unit.Type: ApplicationFiled: February 12, 2016Publication date: January 25, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Keisuke NISHI, Youichi FUKADA, Akihiro MORITA, Seiji YOSHIDA, Takashi HIROSE
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Publication number: 20170350984Abstract: A time synchronization method that is capable of selecting whether synchronization, by a timepiece unit that generates a time signal synchronized with a standard time and outputs it to an exterior, with the time is performed by time information obtained by receiving a radio wave including information relating to the time, or is performed by means of a holdover performed using a clock signal from an internal or external clock source. A schedule having a first time period in which the above-mentioned time information is used, and a second time period by means of the holdover is determined according to temporal reception characteristics of the radio wave at a reception location of the radio wave, and according to the schedule, supplying the timepiece unit with the time information or supplying the timepiece unit with the clock signal from the internal or external clock source.Type: ApplicationFiled: February 12, 2016Publication date: December 7, 2017Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Keisuke NISHI, Youichi FUKADA, Akihiro MORITA, Seiji YOSHIDA, Takashi HIROSE
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Patent number: 9276670Abstract: A self-diagnostic method for PON protection system, in which optical switch-related failure can be previously inspected, and a PON protection system.Type: GrantFiled: November 15, 2012Date of Patent: March 1, 2016Assignee: Nippon Telegraoh and Telephone CorporationInventors: Youichi Fukada, Takashi Mitsui, Takeshi Sakamoto, Naoto Yoshimoto, Yasutaka Kimura
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Patent number: 9179204Abstract: A normal system OSU, a redundancy system OSU, an optical switch, a concentration switch, and a controller which detects a command input by operation control and performs control according to the command are provided, and in such a state that the controller detects a redundancy system switching command indicating that the normal system OSU is switched to the redundancy system OSU, the controller induces the concentration switch to change a storage destination of a down signal, instructs the normal system OSU which is the switching source OSU to stop transmission of a transmission permission message, instructs the optical switch to switch a path after receiving remaining data processing completion notifications from the concentration switch and the normal system OSU which is the switching source OSU, writes accumulated information about the normal system OSU, which is the switching source OSU, in the redundancy system OSU, and notifies the concentration switch of completion of switching, whereby a down signal iType: GrantFiled: October 12, 2012Date of Patent: November 3, 2015Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takashi Mitsui, Youichi Fukada, Takeshi Sakamoto, Naoto Yoshimoto
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Publication number: 20150003822Abstract: A self-diagnostic method for PON protection system, in which optical switch-related failure can be previously inspected, and a PON protection system.Type: ApplicationFiled: November 15, 2012Publication date: January 1, 2015Inventors: Youichi Fukada, Takashi Mitsui, Takeshi Sakamoto, Naoto Yoshimoto, Yasutaka Kimura
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Publication number: 20140219654Abstract: A normal system OSU, a redundancy system OSU, an optical switch, a concentration switch, and a controller which detects a command input by operation control and performs control according to the command are provided, and in such a state that the controller detects a redundancy system switching command indicating that the normal system OSU is switched to the redundancy system OSU, the controller induces the concentration switch to change a storage destination of a down signal, instructs the normal system OSU which is the switching source OSU to stop transmission of a transmission permission message, instructs the optical switch to switch a path after receiving remaining data processing completion notifications from the concentration switch and the normal system OSU which is the switching source OSU, writes accumulated information about the normal system OSU, which is the switching source OSU, in the redundancy system OSU, and notifies the concentration switch of completion of switching, whereby a down signal iType: ApplicationFiled: October 12, 2012Publication date: August 7, 2014Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takashi Mitsui, Youichi Fukada, Takeshi Sakamoto, Naoto Yoshimoto
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Patent number: 7698290Abstract: A transmitting apparatus arranges data in matrix, calculates error correction codes in the data's column direction, arranges the calculated error correction codes in matrix having the same number of columns as the data, attaches number information corresponding to a row number to each row having data or error correction code, encapsulates, into each packet, each row having number information and data or error correction code, plus error detection code detecting one or more bit errors at least in the number information and the data or error correction code in the packet, and transmits the packet. Receiving apparatus discards received packets having detected errors using the error detection code in each packet, checks packet losses according to number information, and restores lost data using the error correction codes. An error correction method compensates for packet losses and bit errors in a packet, realizing efficient transmission with less delay by simple configuration.Type: GrantFiled: August 1, 2006Date of Patent: April 13, 2010Assignee: Nippon Telegraph and Telephone CorporationInventors: Koichi Saito, Youichi Fukada, Yoichi Maeda, Kiyomi Kumozaki
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Publication number: 20090055704Abstract: A transmitting apparatus arranges data in matrix, calculates error correction codes in the data's column direction, arranges the calculated error correction codes in matrix having the same number of columns as the data, attaches number information corresponding to a row number to each row having data or error correction code, encapsulates, into each packet, each row having number information and data or error correction code, plus error detection code detecting one or more bit errors at least in the number information and the data or error correction code in the packet, and transmits the packet. Receiving apparatus discards received packets having detected errors using the error detection code in each packet, checks packet losses according to number information, and restores lost data using the error correction codes. An error correction method compensates for packet losses and bit errors in a packet, realizing efficient transmission with less delay by simple configuration.Type: ApplicationFiled: August 1, 2006Publication date: February 26, 2009Applicant: Nippon Telegraph and Telephone CorporationInventors: Koichi Saito, Youichi Fukada, Yoichi Maeda, Kiyomi Kumozaki