Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An object is to simplify a process performed due to a failure recovery. To realize this object, the transmission apparatus includes a determining unit that determines, when a transmission apparatus receives a frame from each ring in a network including multiple rings in which a part of each ring is shared, whether failure information indicating that a failure has occurred in one of the rings is contained in one of the received frames. The transmission apparatus also includes a mapping unit that maps a frame that is determined by the determining unit to contain the failure information, onto a shared frame that is a frame used in a shared portion in the multiple rings. Accordingly, the process performed due to a failure recovery can be simplified.