Abstract: The network device information management apparatus includes: a log data acquisition unit configured to acquire log data from each of the plurality of devices, the log data including information about components of the plurality of devices; and an inventory information estimation unit configured to exclude a common portion of the log data before and after registration of the component to extract a component configuration indicating information about the component newly registered to the device, compare the extracted component configuration with the component configuration extracted from a component registered to another device, estimate the common portion as inventory information, and store the estimated inventory information in storage means.

Abstract: A semiconductor device includes a first conductive plate, a second conductive plate, first switching elements, second switching elements, a first supply terminal and a second supply terminal. The first and second conductive plates are spaced apart from each other in a first direction. The first switching elements are bonded to the first conductive plate, and are electrically connected to the second conductive plate. The second switching elements are bonded to the second conductive plate. The first supply terminal is bonded to the first conductive plate. The second supply terminal has a region that overlaps with the first supply terminal as viewed in a plan view. The second supply terminal is spaced apart from the first conductive plate and the first supply terminal in a thickness direction perpendicular to the first direction. The second supply terminal is electrically connected to the second switching elements.

Abstract: A monitoring control unit (22) of an OXC (20d) stores a management table (22a) in which pieces of information regarding a modulation mode, an FEC, and a frame mode of an optical signal are associated with each other, and sequentially changes the modulation mode, the FEC, and the frame mode according to the management table (22a) upon an LOS alert from a relay-side optical input/output unit (24) or an LOF alert from a DSP (25) being input thereto. Upon successfully receiving an appropriate optical signal according to the change, the monitoring control unit (22) acquires transmission source information included in the optical signal, and detects an occurrence of erroneous connection of an optical transmission line in an OXC (20g), which serves as a relay apparatus, when the acquired transmission source information indicates an optical cross-connect apparatus that is a transmission source different from an original transmission source.

Abstract: A transmission device (10) includes a flow table (11) that stores identification information about an uninterruptible target flow; a transmission-side identification unit (12) that identifies whether a received packet is from the target flow or a non-target flow based on whether the received packet matches the identification information about the target flow stored in the flow table (11); a tag application unit (13) that applies, to packets from the target flow, an uninterruptible identifier indicating that the packets are from the target flow and a sequence number for distinguishing the packets from other packets; and a branch unit (14) that branches the packets from the target flow processed by the tag application unit (13) into packets to be transferred to an active path (41) among redundant routes and packets to be transferred to a backup path (42) among the redundant routes.

Abstract: An optical transmission system (10) includes a plurality of transmission devices such as transponders (TPs) and optical cross-connects (OXCs) installed in each of stations (11-15) connected via a communication network, a control device (20), and a substitute OXC (502) serving as a substitute transmission device. The control device 20 is installed in a control station (14) of the stations. The control device (20) controls the transmission devices of the stations (11-15) in a centralized manner in accordance with physical network (NW) configuration information (20D) stored in a DB (21) and including config information. When a transmission device is replaced with a new OXC (5o3) serving as a new transmission device, the substitute OXC (5o2) operates as a substitute for the new OXC (5o3) to communicate with the control device (20) until config setting necessary for the new OXC (5o3) is completed.

Abstract: A part information management device (10) includes: a part setting information acquirement unit (111) that acquires, as part setting information, information for identifying parts set in apparatuses; a market data acquirement unit (112) that acquires, for each of the parts, market data related to a part change of the part; a risk estimation unit (114) that estimates a risk of a silent change by a predetermined estimation algorithm with use of the market data, the risk of the silent change indicating that the part is changed; and a part information generation unit (113) that generates part information with the part setting information acquired for each of the parts and the estimated risk of the silent change corresponding to each other and stores the part information in a storage unit (13).

Abstract: A transmission device (10) includes a flow table (11) that stores identification information about an uninterruptible target flow; a transmission-side identification unit (12) that identifies whether a received packet is from the target flow or a non-target flow based on whether the received packet matches the identification information about the target flow stored in the flow table (11); a tag application unit (13) that applies, to packets from the target flow, an uninterruptible identifier indicating that the packets are from the target flow and a sequence number for distinguishing the packets from other packets; and a branch unit (14) that branches the packets from the target flow processed by the tag application unit (13) into packets to be transferred to an active path (41) among redundant routes and packets to be transferred to a backup path (42) among the redundant routes.

Abstract: [Problem] A transmission system, an apparatus management server, a failure management method, and a program enabling the cause of a failure associated with a silent change of an article to be swiftly identified are provided. [Solution] An apparatus management server 100 of a transmission system includes a collection unit configured to collect history information on an introduction instance of articles to an optical transmission apparatus 10 and an information analysis unit 130 configured to visualize and display, based on the history information collected, a graph in which a starting date of use for each of the articles is associated with the number of introductions of the article.

Abstract: A monitoring control unit (22) of an OXC (20d) stores a management table (22a) in which pieces of information regarding a modulation mode, an FEC, and a frame mode of an optical signal are associated with each other, and sequentially changes the modulation mode, the FEC, and the frame mode according to the management table (22a) upon an LOS alert from a relay-side optical input/output unit (24) or an LOF alert from a DSP (25) being input thereto. Upon successfully receiving an appropriate optical signal according to the change, the monitoring control unit (22) acquires transmission source information included in the optical signal, and detects an occurrence of erroneous connection of an optical transmission line in an OXC (20g), which serves as a relay apparatus, when the acquired transmission source information indicates an optical cross-connect apparatus that is a transmission source different from an original transmission source.

Abstract: A management device of a transmission system includes a new path information input unit, a statistical information collecting unit that collects statistical information of actual traffic from nodes, and an uninterruptible path designing unit that calculates a delay fluctuation in an entire path with respect to a fluctuation for each section of the path, and designs a path in which the calculated delay fluctuation is smaller than a maximum fluctuation amount according to a buffering amount in the reception node as an uninterruptible path, a path information setting unit that updates path information of the path and stores the updated path information in an existing path information storage unit, and sets a bandwidth permitted in a node constituting the path in the node, and a notification unit that notifies a user of a path that was not designed as the uninterruptible path.

Abstract: An optical transmission system (10) includes a plurality of transmission devices such as transponders (TPs) and optical cross-connects (OXCs) installed in each of stations (11-15) connected via a communication network, a control device (20), and a substitute OXC (502) serving as a substitute transmission device. The control device 20 is installed in a control station (14) of the stations. The control device (20) controls the transmission devices of the stations (11-15) in a centralized manner in accordance with physical network (NW) configuration information (20D) stored in a DB (21) and including config information. When a transmission device is replaced with a new OXC (5o3) serving as a new transmission device, the substitute OXC (5o2) operates as a substitute for the new OXC (5o3) to communicate with the control device (20) until config setting necessary for the new OXC (5o3) is completed.

Abstract: A transmission device (1) to replace a failed transmission device is provided with a search unit (12) that searches for an opposite transmission device, a path establishment unit (13) that establishes a communication path passing through the transmission device (1) and the opposite transmission device, an NW construction unit (14) that constructs, by using the established communication path, an individual NW in which at least the transmission device (1) and the opposite transmission device are arranged. In addition, the transmission device (1) is further provided with a restoration support unit (15) for applying setting by an OpS (Operation System) to the transmission device (1).

Abstract: [Problem] A transmission system, an apparatus management server, a failure management method, and a program enabling the cause of a failure associated with a silent change of an article to be swiftly identified are provided. [Solution] An apparatus management server 100 of a transmission system includes a collection unit configured to collect history information on an introduction instance of articles to an optical transmission apparatus 10 and an information analysis unit 130 configured to visualize and display, based on the history information collected, a graph in which a starting date of use for each of the articles is associated with the number of introductions of the article.

Abstract: [Problem] Inventory information about a network device can be known without vendor intervention. [Solution] The network device information management apparatus 20 includes: a log data acquisition unit configured to acquire log data from each of the plurality of devices 40, the log data including information about components 42 of the plurality of devices; and an inventory information estimation unit configured to exclude a common portion of the log data before and after registration of the component 42 to extract a component configuration indicating information about the component 42 newly registered to the device 40, compare the extracted component configuration with the component configuration extracted from a component 42 registered to another device 40, estimate the common portion as inventory information, and store the estimated inventory information in storage means.

Abstract: [Problem] A management device for a transmission system and a designing method for a transmission system which enable flexible bandwidth designing according to conditions of paths.

Abstract: A frame transmission apparatus includes multiple ports provided in a line unit, and a setting control unit. The setting control unit checks the normality of the frame transfer state within the apparatus by transferring a maintenance management frame from a first port to a second port within the apparatus. When the first port is a logical port configured by link aggregation of multiple physical ports, the setting control unit selects each of the multiple physical ports as a transmission source port and transfers multiple maintenance management frames from the multiple physical ports to the second port.

Abstract: A frame transmission apparatus includes multiple ports provided in a line unit, and a setting control unit. The setting control unit checks the normality of the frame transfer state within the apparatus by transferring a maintenance management frame from a first port to a second port within the apparatus. When the first port is a logical port configured by link aggregation of multiple physical ports, the setting control unit selects each of the multiple physical ports as a transmission source port and transfers multiple maintenance management frames from the multiple physical ports to the second port.