Abstract: An authorization apparatus includes a memory configured to store attribute information associating an identification information of data and information indicating an attribute of the data, the data being stored in a data server, a processor configured to generate an access token in association with an extraction condition to be used for extracting the data to be obtained by a terminal, and a communicator configured to receive a target access token from the data server, wherein when receiving the target access token, the processor is configured to extract identification information of data pieces satisfying the extraction condition associated with the target access token, and generate a list of identification information of the data to be disclosed to the terminal using a target access token, and the communicator transmits the list to the data server.

Abstract: An authorization apparatus includes a memory configured to store attribute information associating an identification information of data and information indicating an attribute of the data, the data being stored in a data server, a processor configured to generate an access token in association with an extraction condition to be used for extracting the data to be obtained by a terminal, and a communicator configured to receive a target access token from the data server, wherein when receiving the target access token, the processor is configured to extract identification information of data pieces satisfying the extraction condition associated with the target access token, and generate a list of identification information of the data to be disclosed to the terminal using a target access token, and the communicator transmits the list to the data server.

Abstract: A communication method executed by a processor included in a control device that controls a plurality of transfer devices that store a combination of a content name and a port which is an output destination of an acquisition request for content identified by the content name, the method communication method includes retrieving a loop path that passes through at least part of the plurality of transfer devices; generating a control packet that requests each of the plurality of transfer devices included in the loop path to replace the combination for content acquirable via the loop path with information on which common identification information included in common in the content name that identifies the content acquirable via the loop path is associated with an output port when the loop path is used; and transmitting the generated control packet to each of the plurality of transfer devices included in the loop path.

Abstract: A transmission apparatus being one of a plurality of transmission apparatuses included in a ring network, including: a processor configured to: receive a specified message from a first transmission apparatus, the specified message being for setting loopback for at least one wavelength in a ring network, the specified message being transmitted when a failure of at least one optical signal having the at least one wavelength is detected in a specified link of the ring network, and set a loopback to a switch, the loopback being set for a specified wavelength of the at least one wavelength when a specified optical signal having the specified wavelength is terminated by the switch and converted to an electrical signal and when the specified optical signal having the specified wavelength is not terminated and not converted to an electrical signal by any apparatus from a second transmission apparatus to the specified link.

Abstract: A transmission apparatus includes: a storage unit to store a table in which a wavelength terminated by each of transmission apparatuses is associated with each of the transmission apparatuses; a transmission unit to transmit a message including failure information to other transmission apparatus when a failure occurs; a switch controller to determine whether its own transmission apparatus is a last transmission apparatus that terminates the wavelength among transmission apparatuses that are present on a path up to a link where the failure, based on the table, when receiving the message from other transmission apparatus, and to perform a control of switching a transmission direction of a signal having the wavelength when the switch controller determines that its own transmission apparatus is the last transmission apparatus to terminate the wavelength; and a switch to switch a transmission direction of the signal for each wavelength under a control of the switch controller.

Abstract: A transmission apparatus being one of a plurality of transmission apparatuses included in a ring network, including: a processor configured to: receive a specified message from a first transmission apparatus, the specified message being for setting loopback for at least one wavelength in a ring network, the specified message being transmitted when a failure of at least one optical signal having the at least one wavelength is detected in a specified link of the ring network, and set a loopback to a switch, the loopback being set for a specified wavelength of the at least one wavelength when a specified optical signal having the specified wavelength is terminated by the switch and converted to an electrical signal and when the specified optical signal having the specified wavelength is not terminated and not converted to an electrical signal by any apparatus from a second transmission apparatus to the specified link.

Abstract: In an optical transmission apparatus, a path information table stores paths set in a network and wavelength channel information on the paths. A controller searches for an apparatus which performs route switching of paths using a plurality of grouped wavelength channels, based on fault information on the network detected by the optical transmission apparatus, fault information on the network detected by other optical transmission apparatus, and the paths and wavelength channel information on the paths stored in the path information table. When determining that the number of operating paths is maximized by performing the route switching of the paths in the optical transmission apparatus, the controller performs the route switching of the paths.

Abstract: A transmission apparatus includes: a storage unit to store a table in which a wavelength terminated by each of transmission apparatuses is associated with each of the transmission apparatuses; a transmission unit to transmit a message including failure information to other transmission apparatus when a failure occurs; a switch controller to determine whether its own transmission apparatus is a last transmission apparatus that terminates the wavelength among transmission apparatuses that are present on a path up to a link where the failure, based on the table, when receiving the message from other transmission apparatus, and to perform a control of switching a transmission direction of a signal having the wavelength when the switch controller determines that its own transmission apparatus is the last transmission apparatus to terminate the wavelength; and a switch to switch a transmission direction of the signal for each wavelength under a control of the switch controller.

Abstract: An apparatus switches paths in a wavelength-multiplexing network in which a first number of wavelengths each used for a path to transmit an optical signal are multiplexed into an optical fiber. The apparatus includes an entire switching unit and a second number of individual switching units where the second number is smaller than the first number. The entire switching unit is configured to perform a path-switching process for switching a path, simultaneously on all the first number of wavelengths when failures have occurred for all the first number of wavelengths. The second number of individual switching units are each configured to perform the path-switching process individually on one of a third number of wavelengths included in the first number of wavelengths when at least one failure has occurred for the third number of wavelengths where the third numbers is smaller than the first number.

Abstract: A transmission apparatus includes a processor configured to recognize a number of working failures and a number of protection failures on a network for transmission of wavelength-multiplexed signal light, the number of working failures being the number of failures in signal light in wavelengths at a working entity and the number of protection failures being the number of failures in signal light in wavelengths at a protection entity, configured to perform path switching for each group of signal light in wavelengths that are different from each other and configured to select, when multiple failures occur, restoration processing, on a basis of the number of working failures and the number of protection failures.

Abstract: In an optical transmission apparatus, a path information table stores paths set in a network and wavelength channel information on the paths. A controller searches for an apparatus which performs route switching of paths using a plurality of grouped wavelength channels, based on fault information on the network detected by the optical transmission apparatus, fault information on the network detected by other optical transmission apparatus, and the paths and wavelength channel information on the paths stored in the path information table. When determining that the number of operating paths is maximized by performing the route switching of the paths in the optical transmission apparatus, the controller performs the route switching of the paths.

Abstract: A ROADM device generates link information including a virtual link in which a first link that is used by a node apparatus for transmitting a signal and a second link of a ROADM device that is capable of branching a signal transmitted via the first link when the signal is transmitted via a WDM network are virtually connected each other, and transmits the generated link information.

Abstract: A communication apparatus stores therein link information indicating a network connection status of an entire hierarchical network, collects link information indicating a network connection status in its own area in predetermined cycles, and transmits the collected link information to another area assigned a level different from a level assigned to its own area. When receiving link information from another area assigned a different level, the communication apparatus determines whether the received link information is new link information newer than link information stored in a predetermined storage unit; when it is determined that the received link information is new link-information, the communication apparatus stores the new link information into the predetermined storage unit and advertises it in its own area; by contrast, when it is determined that the received link information is not new link-information, the communication apparatus discards the received link information without storing and advertising.

Abstract: A node apparatus in a ring network in which a protection path is provided that cycles around the ring network and transports a signal in a direction opposite to a signal transporting direction of the working path and in the event of a failure of the working path, a node apparatus adjacent to the failure loops back the signal flowing on the working path onto the protection path, the node apparatus comprising: allowable bandwidth storing unit which stores a maximum total bandwidth value, which represents the largest value among per-link total values of bandwidths that a plurality of working paths use on respective links connecting between the node apparatuses, as an allowable bandwidth for a shared path; and bandwidth control unit which controls the bandwidth of traffic flowing on the protection path, in accordance with the allowable bandwidth.

Abstract: An apparatus switches paths in a wavelength-multiplexing network in which a first number of wavelengths each used for a path to transmit an optical signal are multiplexed into an optical fiber. The apparatus includes an entire switching unit and a second number of individual switching units where the second number is smaller than the first number. The entire switching unit is configured to perform a path-switching process for switching a path, simultaneously on all the first number of wavelengths when failures have occurred for all the first number of wavelengths. The second number of individual switching units are each configured to perform the path-switching process individually on one of a third number of wavelengths included in the first number of wavelengths when at least one failure has occurred for the third number of wavelengths where the third numbers is smaller than the first number.

Abstract: When opposed communication transmitting apparatuses A and C are connected in a physical configuration thorough a communication transmitting apparatus B, if an interface configuration changing command is input to the communication transmitting apparatus B, the interface configuration is changed in the communication transmitting apparatus B and virtual connection is achieved such that the opposed communication transmitting apparatuses A and C pass through the communication transmitting apparatus B to directly connect an interface A1 and an interface C1. In this situation, since the GMPLS operation target apparatuses are only the communication transmitting apparatus A and the communication transmitting apparatus C and the communication transmitting apparatus B is a non-target apparatus of the GMPLS operation, the GMPLS scalability problem is solved and optical signals may be transferred at higher speed.

Abstract: A transmission apparatus includes a processor configured to recognize a number of working failures and a number of protection failures on a network for transmission of wavelength-multiplexed signal light, the number of working failures being the number of failures in signal light in wavelengths at a working entity and the number of protection failures being the number of failures in signal light in wavelengths at a protection entity, configured to perform path switching for each group of signal light in wavelengths that are different from each other and configured to select, when multiple failures occur, restoration processing, on a basis of the number of working failures and the number of protection failures.

Abstract: A signaling apparatus is applied to a node constituting a network including internal network to network interface (INNI) domains having INNI interfaces between a plurality of networks in an area and external network to network interface (ENNI) domains having ENNI interfaces that connect the INNI domains. The apparatus includes a processing unit that processes a signaling message for setting a path when an end-to-end path that passes through the INNI domains and the ENNI domains that connect the INNI domains is set in response to the signaling message, a storing unit that holds information on types of links between an own node and adjacent nodes, and a judging unit that judges whether the own node is a connection end point of the INNI domains or the ENNI domains with reference to route information in the message and the information on the types of the links held in the storing unit.

Abstract: A relay node comprising a reception station for receiving a route trace control message including routing information on a path used for data transfer from a starting node to a terminal node from the preceding node on the path, an editing section for, if the home node is boundary node located at the boundary of a routing information shielding section on the path, editing so that a portion on the routing information shielding section of the routing information included in the route trace control message received by the reception section cannot be identified, and a transmission section for sending out a route trace control message after the edition to the node of the subsequent stage, which is located on the path.

Abstract: A signal transmission method includes causing each of a plurality of nodes to transfer, using the actually used line, a second signal in a second layer, in which one or a plurality of first signals in a first layer are contained, to a node adjacent in the first or the second direction when each of the plurality of nodes transmits or receives the first signal, when no failure occurs in a transmission path in a network, and causing a first node, located at an end of a failure point, to switch a transmission direction of the second signal and to send out the second signal to the backup line, and causing a second node, which is a transmission source or a reception destination of the first signal, to select one of the first and second directions, when a failure occurs in the transmission path in the network.