Patents by Inventor Yuji Tochio
Yuji Tochio 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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Publication number: 20240396634Abstract: Optical transmission device includes: first frame generator, second frame generator and transmission circuits. The first frame generator generates first frame. The second frame generator generates one or a plurality of second frames from the first frame. The number of the second frames corresponds to bandwidth of the first frame. The transmission circuits transmit the second frames. When specified bit pattern is transmitted to second optical transmission device, (1) the first frame generator generates third frame including the specified bit pattern, bandwidth of the third frame being equal to or smaller than bandwidth of the second frame, (2) the second frame generator generates fourth frame having the same format as a format of the second frame, the third frame being accommodated in the fourth frame, and (3) the fourth frame is transmitted to the second optical transmission device by selected one of the transmission circuits.Type: ApplicationFiled: April 24, 2024Publication date: November 28, 2024Applicant: Fujitsu LimitedInventor: Yuji TOCHIO
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Patent number: 11923968Abstract: An optical transmission device includes: a signal processor, a first frame generator circuit and a second frame generator circuit. The signal processor accommodates a client signal into one or a plurality of time slot sequences among n time slot sequences. The first frame generator circuit generates a frame including the client signal accommodated into a part of time slot sequences among the n time slot sequences. The second frame generator circuit generates a frame including the client signal accommodated into other time slot sequences among the n time slot sequences. The signal processor accommodates the client signal into the n time slot sequences when the first frame generator circuit and the second frame generator circuit are implemented, and accommodates the client signal into the other time slot sequences when the first frame generator circuit is not implemented and the second frame generator circuit is implemented.Type: GrantFiled: December 29, 2021Date of Patent: March 5, 2024Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20220278767Abstract: An optical transmission device includes: a signal processor, a first frame generator circuit and a second frame generator circuit. The signal processor accommodates a client signal into one or a plurality of time slot sequences among n time slot sequences. The first frame generator circuit generates a frame including the client signal accommodated into a part of time slot sequences among the n time slot sequences. The second frame generator circuit generates a frame including the client signal accommodated into other time slot sequences among the n time slot sequences. The signal processor accommodates the client signal into the n time slot sequences when the first frame generator circuit and the second frame generator circuit are implemented, and accommodates the client signal into the other time slot sequences when the first frame generator circuit is not implemented and the second frame generator circuit is implemented.Type: ApplicationFiled: December 29, 2021Publication date: September 1, 2022Applicant: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20220038346Abstract: A transmission device includes a processor configured to arrange a traffic in one or more slots assigned, based on slot information, in an overhead among slots of a frame signal received in one of a first transmitter/receiver and a second transmitter/receiver and to be transmitted from the other, acquire traffic information that indicates an increase or decrease in the traffic, and update the slot information so that a number of slots in which the traffic is accommodated increases or decreases, based on the traffic information, generate a message regarding update of the slot information based on the increase or decrease in the traffic, and insert the message into the overhead of the frame signal received in the one of the first transmitter/receiver and the second transmitter/receiver and to be transmitted from the other.Type: ApplicationFiled: May 25, 2021Publication date: February 3, 2022Applicant: FUJITSU LIMITEDInventor: Yuji TOCHIO
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Patent number: 10917350Abstract: A transmission device includes at least one port, first and second transceivers, and a processor. The first transceiver transmits or receives a frame signal to or from one adjacent node within a ring network including a plurality of nodes. The frame signal includes an overhead and a plurality of slots. The second transceiver transmits or receives a frame signal to or from another adjacent node within the ring network. The processor sets port information to the overhead of a frame signal to be transmitted from the first transceiver. The processor acquires slot information from the overhead of a frame signal received by the first transceiver or the second transceiver based on the port information. The processor sets a received data signal in a slot allocated based on the slot information, among the plurality of slots of a frame signal to be transmitted from the first transceiver or the second transceiver.Type: GrantFiled: June 12, 2019Date of Patent: February 9, 2021Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Patent number: 10848840Abstract: A communication apparatus includes a receiver configured to receive a signal from a first line, a signal processing circuit configured to perform descrambling processing on the received signal, detect a control signal from the descrambled signal, generate a signal in which an idle signal in accordance with a difference amount between a communication capacity of a second line as a transmission destination and a communication capacity of the first line is inserted in a position where the control signal is detected, and perform scrambling processing on the generated signal, and a transmitter configured to output the scrambled signal to the second line.Type: GrantFiled: September 16, 2019Date of Patent: November 24, 2020Assignee: FUJITSU LIMITEDInventors: Yuji Tochio, Toru Katagiri, Hiroshi Tomonaga
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Patent number: 10742543Abstract: A transmission apparatus includes: a switch circuit to hold a first protection path provided for a working path in a first network, a second protection path provided for the working path in a second network, and a bridge path provided between a working apparatus to relay traffic on the working path between the first and second networks and a protection apparatus to relay traffic on the first and second protection paths; and a signal processing unit to, upon reception of a first control signal indicating a failure on the working path from the first network, transmit the first control signal to the working apparatus and control the switch circuit in accordance with a second control signal corresponding to the first control signal received from the working apparatus, wherein the transmission apparatus is the protection apparatus, and is provided on a boundary between the first and second networks.Type: GrantFiled: May 30, 2018Date of Patent: August 11, 2020Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20200028784Abstract: A transmission device includes at least one port, first and second transceivers, and a processor. The first transceiver transmits or receives a frame signal to or from one adjacent node within a ring network including a plurality of nodes. The frame signal includes an overhead and a plurality of slots. The second transceiver transmits or receives a frame signal to or from another adjacent node within the ring network. The processor sets port information to the overhead of a frame signal to be transmitted from the first transceiver. The processor acquires slot information from the overhead of a frame signal received by the first transceiver or the second transceiver based on the port information. The processor sets a received data signal in a slot allocated based on the slot information, among the plurality of slots of a frame signal to be transmitted from the first transceiver or the second transceiver.Type: ApplicationFiled: June 12, 2019Publication date: January 23, 2020Applicant: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20200014990Abstract: A communication apparatus includes a receiver configured to receive a signal from a first line, a signal processing circuit configured to perform descrambling processing on the received signal, detect a control signal from the descrambled signal, generate a signal in which an idle signal in accordance with a difference amount between a communication capacity of a second line as a transmission destination and a communication capacity of the first line is inserted in a position where the control signal is detected, and perform scrambling processing on the generated signal, and a transmitter configured to output the scrambled signal to the second line.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Applicant: FUJITSU LIMITEDInventors: Yuji Tochio, Toru Katagir, Hirosh Tomonaga
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Publication number: 20180278515Abstract: A transmission apparatus includes: a switch circuit to hold a first protection path provided for a working path in a first network, a second protection path provided for the working path in a second network, and a bridge path provided between a working apparatus to relay traffic on the working path between the first and second networks and a protection apparatus to relay traffic on the first and second protection paths; and a signal processing unit to, upon reception of a first control signal indicating a failure on the working path from the first network, transmit the first control signal to the working apparatus and control the switch circuit in accordance with a second control signal corresponding to the first control signal received from the working apparatus, wherein the transmission apparatus is the protection apparatus, and is provided on a boundary between the first and second networks.Type: ApplicationFiled: May 30, 2018Publication date: September 27, 2018Applicant: FUJITSU LIMITEDInventor: Yuji Tochio
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Patent number: 10009262Abstract: A transmission apparatus includes: a switch circuit to hold a first protection path provided for a working path in a first network, a second protection path provided for the working path in a second network, and a bridge path provided between a working apparatus to relay traffic on the working path between the first and second networks and a protection apparatus to relay traffic on the first and second protection paths; and a signal processing unit to, upon reception of a first control signal indicating a failure on the working path from the first network, transmit the first control signal to the working apparatus and control the switch circuit in accordance with a second control signal corresponding to the first control signal received from the working apparatus, wherein the transmission apparatus is the protection apparatus, and is provided on a boundary between the first and second networks.Type: GrantFiled: September 21, 2015Date of Patent: June 26, 2018Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20170302473Abstract: A method of transmission of a signal using a ring network that includes a plurality of transmission devices, any one transmission device of the plurality of transmission devices being set as a first blocking portion, and any another transmission device of the plurality of transmission devices being set as a second blocking portion, the method includes setting first information to a first signal, and transmitting the first signal from a first transmission device to a second transmission device, wherein when a value of the first information is a first value, the first blocking portion passes the first signal and the second blocking portion blocks the first signal, and when the value of the first information is a second value, the second blocking portion passes the first signal and the first blocking portion blocks the first signal.Type: ApplicationFiled: January 31, 2017Publication date: October 19, 2017Applicant: FUJITSU LIMITEDInventor: Yuji Tochio
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Patent number: 9716650Abstract: A communication system includes a work path and a protection path that are set between a first transfer apparatus and a second transfer apparatus, one of the work path and the protection path being selected by the first transfer apparatus and the second transfer apparatus according to a control signal that includes first information indicating whether there is a failure in one of the work path and the protection path, and a third path that is activated when the first transfer apparatus or the second transfer apparatus receives a control signal in which the first information has been changed to second information indicating that a failure had occurred in both the work path and the protection path and is selected by the first transfer apparatus and the second transfer apparatus.Type: GrantFiled: June 5, 2014Date of Patent: July 25, 2017Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20170111186Abstract: An APS signal applied with a first VLAN ID is transmitted to a first protection path that is shared by first and second working paths #1 and #2, and an APS signal applied with a second VLAN ID is transmitted to a second protection path that is a protection path candidate for the second working path #2.Type: ApplicationFiled: September 27, 2016Publication date: April 20, 2017Applicant: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20170034043Abstract: A detection process of a signal failure based on a reception state for a protection communication path is controlled in response to a routing control for a partial section of work and protection communication paths set between end nodes.Type: ApplicationFiled: June 13, 2016Publication date: February 2, 2017Applicant: FUJITSU LIMITEDInventor: Yuji Tochio
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Patent number: 9391694Abstract: A protection path providing method is used in a network that includes a shared section in which a first protection path corresponding to a first work path to transmit a first traffic and a second protection path corresponding to a second work path to transmit a second traffic are configured. The method includes: transmitting a message that includes information indicating a transmission rate of the first work path via a logical ring, the logical ring being formed using a route for which the first work path is configured and a route for which the first protection path is configured, when a failure is detected in the first work path; and controlling a switch circuit installed in a transmission device provided at an end of the shared section in accordance with the message in such a manner as to transmit the first traffic via the shared section.Type: GrantFiled: November 17, 2014Date of Patent: July 12, 2016Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Patent number: 9369786Abstract: An optical transmission device in an optical transmission network including nodes, provided to one of the nodes, the optical transmission device including: a receiver to receive optical signals which have different wavelengths and are multiplexed, an optical detector to detect a strength of the optical signals, a switch to set switching control information including switching request information, each corresponding to one optical signal of the optical signals, and a transmitter to transmit the switching control information by an optical signal, wherein the switch sets, in information indicating a signal fail, the switching request information corresponding to the one optical signal in the switching control information based on the strength of one optical signal of the optical signals.Type: GrantFiled: August 24, 2012Date of Patent: June 14, 2016Assignee: FUJITSU LIMITEDInventor: Yuji Tochio
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Publication number: 20160119221Abstract: A transmission device is located between a first node and a second node in a multi-layer network in which a path message is transmitted from the first node to the second node and a response message corresponding to the path message is transmitted from the second node to the first node. A transmission device includes: an upper layer switch that processes traffic in the upper layer; a lower layer switch that processes traffic in a lower layer; and a signaling processor that processes the path message and the response message. The signaling processor transmits a message for establishing a path in the lower layer to a node represented by node information added to the response message received from an adjacent node on a downstream side when the lower layer switch is not connected to a lower layer switch of an adjacent node on an upstream side.Type: ApplicationFiled: September 8, 2015Publication date: April 28, 2016Inventor: Yuji Tochio
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Publication number: 20160119225Abstract: A transmission apparatus includes: a switch circuit to hold a first protection path provided for a working path in a first network, a second protection path provided for the working path in a second network, and a bridge path provided between a working apparatus to relay traffic on the working path between the first and second networks and a protection apparatus to relay traffic on the first and second protection paths; and a signal processing unit to, upon reception of a first control signal indicating a failure on the working path from the first network, transmit the first control signal to the working apparatus and control the switch circuit in accordance with a second control signal corresponding to the first control signal received from the working apparatus, wherein the transmission apparatus is the protection apparatus, and is provided on a boundary between the first and second networks.Type: ApplicationFiled: September 21, 2015Publication date: April 28, 2016Inventor: Yuji TOCHIO
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Patent number: 9264283Abstract: For a frame comprising a payload region in which a client signal is to be accommodated, and an overhead region accommodation location information indicating a location where the client signal is to be accommodated, the frame being able to be processed as an m (m is an integer equal to or greater than 2)-byte cycle multiframe, the location information for the frame is defined as an m×n (n is an integer equal to or greater than 2)-byte cycle multiframe; using the location information defined as the multiframe, the location where the client signal is to be accommodated in the payload region is defined; and the client signal is accommodated in the payload region, based on the defined location where the client signal is to be accommodated.Type: GrantFiled: January 25, 2013Date of Patent: February 16, 2016Assignee: FUJITSU LIMITEDInventors: Yuji Tochio, Toru Katagiri