Patents by Inventor Masatake Miyabe
Masatake Miyabe 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: 11750490Abstract: A communication coupling verification method executed by a computer, the communication coupling verification method includes identifying both setting information before a setting change of each of network devices arranged in a network and forwarding information before the setting change; identifying both setting information after the setting change and the forwarding information after the setting change; generating a first model before the setting change and a second model after the setting change by using the setting information before the setting change, the forwarding information before the setting change, the setting information after the setting change, and the forwarding information after the setting change; and determining influence of the setting change on the network based on a difference between the generated first model and the generated second model.Type: GrantFiled: March 22, 2021Date of Patent: September 5, 2023Assignee: FUJITSU LIMITEDInventors: Atsushi Kitada, Masatake Miyabe
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Publication number: 20210385145Abstract: A communication coupling verification method executed by a computer, the communication coupling verification method includes identifying both setting information before a setting change of each of network devices arranged in a network and forwarding information before the setting change; identifying both setting information after the setting change and the forwarding information after the setting change; generating a first model before the setting change and a second model after the setting change by using the setting information before the setting change, the forwarding information before the setting change, the setting information after the setting change, and the forwarding information after the setting change; and determining influence of the setting change on the network based on a difference between the generated first model and the generated second model.Type: ApplicationFiled: March 22, 2021Publication date: December 9, 2021Applicant: FUJITSU LIMITEDInventors: Atsushi Kitada, MASATAKE MIYABE
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Patent number: 11057144Abstract: An optical transmission apparatus includes the optical transceiver configured to generate a test light for each wavelength assignable to the wavelength multiplex light to transmit the test light to the optical transmission line via the wavelength multiplexer and demultiplexer, detect a reflected light for the test light from the optical transmission line, calculate an arrival distance of the test light for the each wavelength from the reflected light for the each wavelength, and set a wavelength having a longest arrival distance among the arrival distances for the respective wavelengths, as a wavelength to be assigned to the signal light in the optical transceiver.Type: GrantFiled: November 7, 2019Date of Patent: July 6, 2021Assignee: FUJITSU LIMITEDInventors: Masatake Miyabe, Shoichiro Oda
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Publication number: 20200195365Abstract: An optical transmission apparatus includes the optical transceiver configured to generate a test light for each wavelength assignable to the wavelength multiplex light to transmit the test light to the optical transmission line via the wavelength multiplexer and demultiplexer, detect a reflected light for the test light from the optical transmission line, calculate an arrival distance of the test light for the each wavelength from the reflected light for the each wavelength, and set a wavelength having a longest arrival distance among the arrival distances for the respective wavelengths, as a wavelength to be assigned to the signal light in the optical transceiver.Type: ApplicationFiled: November 7, 2019Publication date: June 18, 2020Applicant: FUJITSU LIMITEDInventors: MASATAKE MIYABE, Shoichiro Oda
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Patent number: 10659184Abstract: An optical transmission device that is provided at a first site includes: an optical transmitter that transmits a first optical signal that includes first ID information to a second site using a first wavelength; and an optical receiver that receives a second optical signal that includes second ID information and that is transmitted using the first wavelength from the second site. When the first ID information matches the second ID information, the optical transmitter transmits a wavelength report that indicates a second wavelength to the second site using the first wavelength. When the optical receiver receives a completion report that indicates the wavelength report has been received at the second site, the optical transmitter transmits an optical signal to the second site using the second wavelength, and the optical receiver ceases to receive an optical signal of the first wavelength from the second site.Type: GrantFiled: December 19, 2018Date of Patent: May 19, 2020Assignee: FUJITSU LIMITEDInventors: Kazuyuki Tajima, Yutaka Takita, Masatake Miyabe
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Patent number: 10382338Abstract: A transfer device operates within a network including a plurality of transfer devices and a control device. The transfer device includes a processor and a network connecting device. The network connecting device receives a packet. When a packet received from any of the plurality of transfer devices does not satisfy a process condition notified from the control device, the processor performs control such that a request message is not transmitted until a specified time period elapses from reception of the received packet. The request message is a message for requesting the control device to notify the transfer device of a process applicable to the received packet. When process information, which is information representing the process applicable to the received packet, has been obtained by the time the specified time period elapses, the processor processes the received packet in accordance with the process information.Type: GrantFiled: June 24, 2015Date of Patent: August 13, 2019Assignee: FUJITSU LIMITEDInventor: Masatake Miyabe
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Publication number: 20190238250Abstract: An optical transmission device that is provided at a first site includes: an optical transmitter that transmits a first optical signal that includes first ID information to a second site using a first wavelength; and an optical receiver that receives a second optical signal that includes second ID information and that is transmitted using the first wavelength from the second site. When the first ID information matches the second ID information, the optical transmitter transmits a wavelength report that indicates a second wavelength to the second site using the first wavelength. When the optical receiver receives a completion report that indicates the wavelength report has been received at the second site, the optical transmitter transmits an optical signal to the second site using the second wavelength, and the optical receiver ceases to receive an optical signal of the first wavelength from the second site.Type: ApplicationFiled: December 19, 2018Publication date: August 1, 2019Applicant: FUJITSU LIMITEDInventors: KAZUYUKI TAJIMA, Yutaka Takita, MASATAKE MIYABE
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Patent number: 10305588Abstract: There is provided a network management device including a memory in which a change rate of a transmission quality of a first optical signal to be transmitted on a first path with respect to a power of the first optical signal is stored, and a processor coupled to the memory and the processor configured to determine, based on the change rate, whether to set a second path on which a second optical signal transmits to overlap with at least a portion of a route of the first path.Type: GrantFiled: November 10, 2017Date of Patent: May 28, 2019Assignee: FUJITSU LIMITEDInventors: Masatake Miyabe, Toru Katagiri
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Patent number: 10237170Abstract: A flow switch stores a plurality of pairs of a protocol message for a communication protocol used in a data plane communication and an identifier of the protocol message. The flow switch applies any one of the stored protocol messages to the data plane communication, and applies an identifier corresponding to a protocol message of a flow control target in the data plane to a control plane communication for a controller.Type: GrantFiled: July 8, 2016Date of Patent: March 19, 2019Assignee: FUJITSU LIMITEDInventor: Masatake Miyabe
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Patent number: 10230462Abstract: An optical transmission characteristic measurement method includes starting transmission of an optical signal from a transmitting node to a receiving node; receiving a bit error rate value measured by the receiving node and relates to the optical signal; determining whether the bit error rate value is higher than a given threshold; adjusting input power of the optical signal to lower until it is determined that the bit error rate value is higher than the given threshold when it is determined that the bit error rate value is not higher than the given threshold; estimating an optical signal to noise ratio from the bit error rate value when it is determined that the bit error rate value is higher than the given threshold; and calculating an optical signal to noise ratio based on the estimated optical signal to noise ratio and an amount of lowering of the input power.Type: GrantFiled: November 9, 2017Date of Patent: March 12, 2019Assignee: FUJITSU LIMITEDInventors: Shoichiro Oda, Toru Katagiri, Satoru Okano, Masatake Miyabe, Yasuhiko Aoki
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Patent number: 10177840Abstract: A communication apparatus configured to communicate with a router included in a first network and a multiplexer that multiplexes a plurality of optical signals having different wavelengths transmitted from the communication apparatus, the communication apparatus comprising a memory, and a processor coupled to the memory and configured to transmit and receive a first signal to and from the router, transmit and receive a second signal to and from another communication apparatus in a second network through the multiplexer, the second signal having a transmission scheme different from the first signal, mutually convert the first signal and the second signal with each other, detect a first communication disabled state between the another communication apparatus and the communication apparatus, and transmit, to the router, a first detection signal for detecting adjacency relationship between the communication apparatus and the router when the first communication disabled state is detected.Type: GrantFiled: April 30, 2018Date of Patent: January 8, 2019Assignee: FUJITSU LIMITEDInventor: Masatake Miyabe
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Patent number: 10158422Abstract: There is provided an apparatus configured to estimate optical transmission performance in a transmission path of an optical signal, the apparatus including a memory, and a processor coupled to the memory and the processor configured to acquire a first index related to a first transmission performance of an optical signal transmitted through a span group between a first node and an n-th node and a second index related to a second transmission performance of an optical signal transmitted through a span or a span group between the first node and an m-th node, wherein n is an integer of 3 or more, and m is the integer satisfying m<n, and estimate a third index related to a third transmission performance of an optical signal to be transmitted through a span between the m-th node and the n-th node, based on the first index and the second index.Type: GrantFiled: April 18, 2017Date of Patent: December 18, 2018Assignee: FUJITSU LIMITEDInventors: Shoichiro Oda, Masatake Miyabe, Setsuo Yoshida, Yasuhiko Aoki, Toru Katagiri, Goji Nakagawa, Shigeru Ishii, Yutaka Takita
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Publication number: 20180323867Abstract: A communication apparatus configured to communicate with a router included in a first network and a multiplexer that multiplexes a plurality of optical signals having different wavelengths transmitted from the communication apparatus, the communication apparatus comprising a memory, and a processor coupled to the memory and configured to transmit and receive a first signal to and from the router, transmit and receive a second signal to and from another communication apparatus in a second network through the multiplexer, the second signal having a transmission scheme different from the first signal, mutually convert the first signal and the second signal with each other, detect a first communication disabled state between the another communication apparatus and the communication apparatus, and transmit, to the router, a first detection signal for detecting adjacency relationship between the communication apparatus and the router when the first communication disabled state is detected.Type: ApplicationFiled: April 30, 2018Publication date: November 8, 2018Applicant: FUJITSU LIMITEDInventor: MASATAKE MIYABE
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Publication number: 20180145747Abstract: An optical transmission characteristic measurement method includes starting transmission of an optical signal from a transmitting node to a receiving node; receiving a bit error rate value measured by the receiving node and relates to the optical signal; determining whether the bit error rate value is higher than a given threshold; adjusting input power of the optical signal to lower until it is determined that the bit error rate value is higher than the given threshold when it is determined that the bit error rate value is not higher than the given threshold; estimating an optical signal to noise ratio from the bit error rate value when it is determined that the bit error rate value is higher than the given threshold; and calculating an optical signal to noise ratio based on the estimated optical signal to noise ratio and an amount of lowering of the input power.Type: ApplicationFiled: November 9, 2017Publication date: May 24, 2018Applicant: FUJITSU LIMITEDInventors: Shoichiro Oda, Toru Katagiri, Satoru Okano, Masatake Miyabe, Yasuhiko Aoki
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Publication number: 20180138973Abstract: There is provided a network management device including a memory in which a change rate of a transmission quality of a first optical signal to be transmitted on a first path with respect to a power of the first optical signal is stored, and a processor coupled to the memory and the processor configured to determine, based on the change rate, whether to set a second path on which a second optical signal transmits to overlap with at least a portion of a route of the first path.Type: ApplicationFiled: November 10, 2017Publication date: May 17, 2018Applicant: FUJITSU LIMITEDInventors: MASATAKE MIYABE, Toru Katagiri
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Publication number: 20180019815Abstract: A transmission quality estimation method estimates a transmission quality of a target path. The method includes: storing path transmission quality values that respectively indicate transmission qualities of paths established between adjacent nodes in a first storage; storing a node transmission quality value that indicates a transmission quality of a node device in a second storage; estimating a transmission quality of the target path based on the path transmission quality values stored in the first storage and the node transmission quality value stored in the second storage; calculating the node transmission quality value based on the estimated transmission quality of the target path; and updating the node transmission quality value stored in the second storage using the calculated node transmission quality value.Type: ApplicationFiled: May 31, 2017Publication date: January 18, 2018Applicant: FUJITSU LIMITEDInventor: MASATAKE MIYABE
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Publication number: 20170310391Abstract: There is provided an apparatus configured to estimate optical transmission performance in a transmission path of an optical signal, the apparatus including a memory, and a processor coupled to the memory and the processor configured to acquire a first index related to a first transmission performance of an optical signal transmitted through a span group between a first node and an n-th node and a second index related to a second transmission performance of an optical signal transmitted through a span or a span group between the first node and an m-th node, wherein n is an integer of 3 or more, and m is the integer satisfying m<n, and estimate a third index related to a third transmission performance of an optical signal to be transmitted through a span between the m-th node and the n-th node, based on the first index and the second index.Type: ApplicationFiled: April 18, 2017Publication date: October 26, 2017Applicant: FUJITSU LIMITEDInventors: Shoichiro Oda, MASATAKE MIYABE, Setsuo Yoshida, Yasuhiko Aoki, Toru Katagiri, GOJI NAKAGAWA, Shigeru ISHll, Yutaka Takita
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Patent number: 9602194Abstract: A transmission device is used for a network that includes a plurality of working paths and a plurality of protection paths bypassing a relevant working path for each working paths. The transmission device includes a data plane unit that transmits and receives data to and from other transmission devices; and a signaling processing unit that performs switching, when a signaling message requesting activation to switch to a first protection path corresponding to a first working path is received, from the first working path to the first protection path, wherein, when the first working path is configured as a subset of a second working path and a second protection path corresponding to the second working path is provided, the signaling processing unit performs switching from the first working path to the first protection path and performs switching from the second working path to the second protection path.Type: GrantFiled: July 6, 2015Date of Patent: March 21, 2017Assignee: FUJITSU LIMITEDInventors: Masatake Miyabe, Tomohiro Hashiguchi, Yutaka Takita, Kazuyuki Tajima
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Publication number: 20170063675Abstract: A flow switch stores a plurality of pairs of a protocol message for a communication protocol used in a data plane communication and an identifier of the protocol message. The flow switch applies any one of the stored protocol messages to the data plane communication, and applies an identifier corresponding to a protocol message of a flow control target in the data plane to a control plane communication for a controller.Type: ApplicationFiled: July 8, 2016Publication date: March 2, 2017Applicant: FUJITSU LIMITEDInventor: MASATAKE MIYABE
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Patent number: 9313122Abstract: A frame transmission system includes: a first frame transmission apparatus configured to transmit a message frame containing an medium access control (MAC) destination address in an intended user MAC frame, and containing both MAC header information and header information of an upper layer in a user MAC frame; and a second frame transmission apparatus configured to identify one output destination physical link based on the MAC header information and the header information of the upper layer acquired from the message frame, when an output destination with regard to the MAC destination address in the message frame constitutes a link aggregation group including a plurality of physical links, and generate a reply frame containing information on the identified output destination physical link and a MAC address of the second frame transmission apparatus in order to return the reply frame to the first frame transmission apparatus.Type: GrantFiled: March 13, 2013Date of Patent: April 12, 2016Assignee: Fujitsu LimitedInventor: Masatake Miyabe