Beach landing station identification device, beach landing station identification method, and program

Abstract

One purpose of the present disclosure is to provide a landing station identification device, a landing station identification method, and a landing station identification program capable of identifying a landing station capable of controlling an optical branching device included in a submarine cable system. The landing station identification device (10) comprises: a cable identification means (101) for identifying a first cable capable of transmitting an optical signal to a first optical branching device on the basis of a failure occurrence status of a plurality of first cables connected to the first optical branching device; an adjacent object identification means (102) for identifying an adjacent object connected to the first optical branching device via the identified first cable, the adjacent object connected to the first optical branching device including a second optical branching device other than the first optical branching device, and a landing station; and a landing station identification means (103) for identifying a landing station as a landing station capable of controlling the first optical branching device when the identified adjacent object is the landing station.

Description

[Technical Field]

[0001] The present disclosure relates to undersea cable systems. [Background technology]

[0002] In recent years, various techniques have been proposed for continuously controlling an optical branching device related to a fault when a fault occurs in a submarine cable connecting a plurality of optical branching devices.

[0003] As an example of such technology, a submarine cable system disclosed in Patent Document 1 includes an optical branching device, a first terminal device capable of communicating with the optical branching device, a second terminal device capable of communicating with the optical branching device, and a control device. When the control device detects a break in the submarine cable between the optical branching device and a third terminal device that has been outputting a control signal, the control device selects either the first terminal device or the second terminal device in accordance with a predetermined priority and instructs the selected device to output a control signal to the optical branching device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 044993 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the control device disclosed in Patent Document 1 selects either the first terminal device or the second terminal device according to a priority order based on the distance from the first terminal device to the optical branching device and the distance from the second terminal device to the optical branching device. Therefore, if a fault occurs in the cable connecting the selected terminal device and the optical branching device, the optical branching device cannot receive the control signal transmitted from the selected terminal device. In other words, the submarine cable system disclosed in Patent Document 1 has a problem in that it is not possible to identify a landing station including a terminal device that can control the optical branching device related to the cable fault.

[0006] In view of the above-mentioned problems, one of the objects of the present disclosure is to provide a landing station identification device, a landing station identification method, and a landing station identification program that can identify a landing station that can control an optical branching device included in a submarine cable system. [Means for solving the problem]

[0007] A landing station identification device according to an exemplary embodiment includes: a cable identifying means for identifying a first cable capable of transmitting an optical signal to the first optical branching device based on a fault occurrence status of a plurality of first cables connected to the first optical branching device; an adjacent object specifying means for specifying an adjacent object connected to the first optical branching device via the specified first cable, the adjacent object connected to the first optical branching device including a second optical branching device other than the first optical branching device and a landing station; and a landing station identifying means for identifying, when the identified adjacent object is a landing station, the landing station as a landing station capable of controlling the first optical branching device.

[0008] In one exemplary embodiment, a landing station identification method includes: The computer Identifying a first cable capable of transmitting an optical signal to the first optical branching device based on a fault occurrence status of a plurality of first cables connected to the first optical branching device; Identify an adjacent object connected to a first optical branching device via a specified first cable. The adjacent objects connected to the first optical branching device include a second optical branching device other than the first optical branching device and a landing station. If the identified adjacent object is a landing station, identify the landing station as a landing station capable of controlling the first optical branching device.

[0009] The landing station identification program according to an exemplary aspect causes a computer to identify a first cable capable of transmitting an optical signal to a first optical branching device based on a failure occurrence status of a plurality of first cables connected to the first optical branching device, to identify an adjacent object connected to the first optical branching device via the identified first cable, wherein the adjacent objects connected to the first optical branching device include a second optical branching device other than the first optical branching device and a landing station, and to identify the landing station as a landing station capable of controlling the first optical branching device if the identified adjacent object is a landing station.

Advantages of the Invention

[0010] According to the present disclosure, it is possible to provide a landing station identification device, a landing station identification method, and a landing station identification program that can identify a landing station capable of controlling an optical branching device included in a submarine cable system.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0012] <First Embodiment> Hereinafter, exemplary embodiments will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a submarine cable system 1 according to an exemplary first embodiment. The submarine cable system 1 includes a control center (NOC: Network Operation Center) T0 where an integrated monitoring and control device 10 is installed, one or more landing stations T1 to T6, and one or more optical branching devices BU1 to BU4.

[0013] Each of the optical branching devices BU1 to BU4 is connected via a submarine cable and can transmit optical signals to each other. Also, the optical branching devices BU1 to BU4 and the landing stations T1 to T6 are connected via a submarine cable and can transmit optical signals to each other. Further, the integrated monitoring and control device 10 and the landing stations T1 to T6 are connected via a cable and can transmit signals to each other. Note that the number of landing stations and optical branching devices shown in FIG. 1 is an example, and the submarine cable system 1 may include any number of landing stations and optical branching devices.

[0014] FIG. 2 is a diagram showing the configuration of the landing station T1. The landing station T2 also has the same configuration as the landing station T1. The landing station T1 includes a monitoring and control device T11, an end station device T12, and a transmission path monitoring device T13.

[0015] The monitoring and control device T11 is a device that controls the terminal device T12 and the optical branching device. Specific examples of the monitoring and control device T11 include an EMS (Element Management System), etc. The monitoring and control device T11 can transmit control information such as control commands for the optical branching device, for example, a power supply switching command, to the terminal device T12.

[0016] The terminal device T12 converts the electrical signal received from the monitoring and control device T11 or the transmission line monitoring device T13 into an optical signal and transmits it to the submarine cable. When the terminal device T12 receives the control information of the optical branching device from the monitoring and control device T11, it transmits the control information to the optical branching device BU1 via the submarine cable.

[0017] Also, the terminal device T12 converts the optical signal received from the submarine cable into an electrical signal and transmits it to the monitoring and control device T11 or the transmission line monitoring device T13.

[0018] The transmission line monitoring device T13 is a device that monitors the occurrence status of faults in the submarine cable. Specific examples of the transmission line monitoring device T13 include an RFTE (Remote Fiber Test Equipment), etc. The transmission line monitoring device T13 provides information indicating the occurrence status of faults in the submarine cable to the integrated monitoring and control device 10.

[0019] Figure 3 is a diagram showing the configuration of the landing station T3. The landing stations T4 to T6 also have the same configuration as the landing station T3. The landing station T3 includes a monitoring and control device T31, terminal devices T32 and T33, and a transmission line monitoring device T34. The monitoring and control device T31, the terminal devices T32 and T33, and the transmission line monitoring device T34 have the same functions as the monitoring and control device T11, the terminal device T12, and the transmission line monitoring device T13 of the landing station T1.

[0020] FIG. 4 is a diagram showing the configuration of the integrated monitoring and control device 10 according to an exemplary first embodiment. The integrated monitoring and control device 10 is a device that monitors and controls the entire undersea cable system 1. Specific examples of the integrated monitoring and control device 10 include, for example, a UMS (Unified Management System) and the like.

[0021] The integrated monitoring and control device 10 includes a processor 11 capable of executing various programs, a communication interface (I / F) 12, and a storage device 13. Specific examples of the processor 11 include various processors such as a CPU (Central Processing Unit) and an MPU (Micro Processing Unit). In the storage device 13, various information processed by the processor 11, for example, a landing station identification program 100, a data table described later, and the like are stored. The integrated monitoring and control device 10 corresponds to a landing station identification device. The integrated monitoring and control device 10 can be realized by a computer.

[0022] The processor 11 reads and executes the landing station identification program 100 from the storage device 13 to execute the landing station identification method according to the first embodiment. The landing station identification program 100 includes a cable identification unit 101, an adjacent object identification unit 102, a landing station identification unit 103, a notification unit 104, and a landing station control unit 105. Note that the functions of the landing station identification program 100 may be realized by an integrated circuit such as an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). Integrated circuits such as processors, FPGAs, and ASICs correspond to a computer.

[0023] The cable identification unit 101 is a program that identifies a first cable capable of transmitting an optical signal to the first optical branching device based on the failure occurrence status of a plurality of first cables connected to the first optical branching device to be controlled.

[0024] The adjacent object identification unit 102 is a program that identifies adjacent objects connected to a first optical branching device via a first cable identified by the cable identification unit 101. In an exemplary first embodiment, optical branching devices other than the first optical branching device and the landing stations T1 to T6 can be adjacent objects.

[0025] The landing station identification unit 103 is a program that identifies landing stations capable of controlling the first optical branching device. When the adjacent object identified by the adjacent object identification unit 102 is a landing station, the landing station identification unit 103 identifies the landing station as a landing station capable of controlling the first optical branching device.

[0026] The notification unit 104 is a program that notifies the landing station identified by the landing station identification unit 103. The notification unit 104 can notify the identified landing station to an operator of the integrated monitoring and control device 10 or the like.

[0027] The landing station control unit 105 is a program that prohibits the transmission of control information to the first optical branching device to the terminal devices of landing stations other than the landing station identified by the landing station identification unit 103. The landing station control unit 105 transmits a control command that prohibits the transmission of control information to the first optical branching device to the terminal devices of landing stations other than the identified landing station. When the terminal devices of the landing stations T1 to T6 receive the control command, they do not execute the transmission of control information to the first optical branching device.

[0028] Figures 5 to 7 are flowcharts showing an example of the processing executed by the integrated monitoring and control device 10. In step S1, the integrated monitoring and control device 10 identifies a cable capable of transmitting an optical signal to the optical branching device to be controlled based on the failure occurrence status of a plurality of cables connected to the optical branching device to be controlled.

[0029] Specifically, the integrated monitoring and control device 10 identifies cables capable of transmitting optical signals based on the failure occurrence status of the cables connected to each port of the optical branching device to be controlled. FIG. 8 shows an example of a failure occurrence status management table. In the failure occurrence status management table, the failure occurrence status of the cables provided by the transmission line monitoring devices of each landing station is registered.

[0030] FIG. 12 shows the failure occurrence status of the undersea cable system 1 based on the failure occurrence status management table of FIG. 8. In this example, a failure has occurred in the cable between the optical branching device BU3 and the optical branching device BU4. Here, it is assumed that the optical branching device BU3 is the optical branching device to be controlled. Referring to the failure occurrence status of the cables connected to the optical branching device BU3 in the failure occurrence status management table of FIG. 8, no failure has occurred in the cable (A branch) connected to port A and the cable (C branch) connected to port C of the optical branching device BU3. On the other hand, a failure has occurred in the cable (B branch) connected to port B. In this case, the integrated monitoring and control device 10 identifies the cable (A branch) connected to port A and the cable (C branch) connected to port C of the optical branching device BU3 as cables capable of transmitting optical signals.

[0031] Note that in the undersea cable system 1, when a cable failure shown in the failure occurrence status management table of FIG. 8 has occurred, the cables capable of transmitting optical signals among the cables connected to each of the optical branching devices BU1 to BU4 are as shown in FIG. 9.

[0032] In step S2, the integrated monitoring and control device 10 refers to the adjacent object information table and identifies the adjacent objects connected to the cables identified in step S1.

[0033] FIG. 10 shows an example of an adjacent object information table according to the first embodiment. In the adjacent object information table, the adjacent objects on the A branch side, B branch side, and C branch side of each optical branching device BU1 to BU4 are registered. Referring to the adjacent object information table shown in FIG. 10, the adjacent object on the A branch side of the optical branching device BU3 is the optical branching device BU2, and the adjacent object on the C branch side is the landing station T5. In this case, the integrated monitoring and control device 10 identifies the optical branching device BU2 as the adjacent object on the A branch side of the optical branching device BU3, and identifies the landing station T5 as the adjacent object on the C branch side of the optical branching device BU3.

[0034] In step S3, the integrated monitoring and control device 10 executes the identification process shown in FIGS. 6 and 7 for each adjacent object identified in step S2, and the process of FIG. 5 ends.

[0035] In the case of the example shown in FIG. 12, when the process of FIG. 5 is executed, the optical branching device BU2 and the landing station T5 are identified as the adjacent objects of the optical branching device BU3 to be controlled. For each of the optical branching device BU2 and the landing station T5, the identification process shown in FIGS. 6 and 7 is executed.

[0036] FIGS. 6 and 7 are diagrams showing an example of the identification process executed by the integrated monitoring and control device 10 according to the first embodiment. In step S10, the integrated monitoring and control device 10 determines whether the identified adjacent object is an optical branching device. If the identified adjacent object is an optical branching device (YES), the process branches to step S11.

[0037] In step S11, the integrated monitoring and control device 10 refers to the optical switch connection state table and determines the connection state of the optical switch of the optical branching device that is the identified adjacent object.

[0038] FIG. 11 is a diagram showing an example of an optical switch connection state table. In the optical switch connection state table, the connection states of the optical switches included in each optical branching device BU1 to BU4 are registered. Trunk-Through is a connection state in which adjacent optical branching devices can be connected. In the example shown in FIG. 1, the connection states of the optical switches of the optical branching devices BU2 and BU4 are Trunk-Through. When the connection state of the optical switch of the optical branching device located at the end of the submarine cable system 1 is Trunk-Through, the adjacent optical branching device and the adjacent landing station are connected. For example, when the connection state of the optical switch of the optical branching device BU4 is Trunk-Through, the adjacent optical branching device BU3 and the adjacent landing station T2 are connected.

[0039] Branch-Through is a connection state in which an adjacent landing station and an adjacent optical branching device can be connected. In the example shown in FIG. 1, the connection states of the optical switches of the optical branching devices BU1 and BU3 are Branch-Through. When the connection state of the optical switch of the optical branching device located at the end of the submarine cable system 1 is Branch-Through, the adjacent landing stations are connected. For example, when the connection state of the optical switch of the optical branching device BU1 is Branch-Through, the adjacent landing stations T1 and T3 are connected.

[0040] When the connection state of the optical switch in step S11 is Trunk-Through, the process branches to step S12. In step S12, the integrated monitoring and control device 10 refers to the failure occurrence status management table and determines whether a failure has occurred in the cable connected by the optical switch of the adjacent optical branching device, which is the target cable for which the presence or absence of a failure has not yet been determined.

[0041] For example, in the case of the example shown in FIG. 12, one of the adjacent objects of the optical branching device BU3 to be controlled is the optical branching device BU2. At this time, for the cable (Branch B) on the optical branching device BU3 side of the optical branching device BU2, since the presence or absence of a failure has already been determined in step S1, the cable (Branch A) on the optical branching device BU1 side of the optical branching device BU2 corresponds to the target cable.

[0042] If a failure has occurred in the target cable (YES), the specific process ends. On the other hand, if no failure has occurred in the target cable (NO), the process branches to step S13.

[0043] In step S13, the integrated monitoring control device 10 refers to the adjacent object information table, identifies the adjacent object connected to the target cable, and the process returns to step S10. In this case, in step S10, the integrated monitoring control device 10 determines whether the adjacent object identified in step S13 is an optical branching device.

[0044] On the other hand, if it is determined in step S11 that the connection state of the optical switch is branch-through, the process branches to step S14. In step S14, the integrated monitoring control device 10 refers to the failure occurrence status management table and determines whether a failure has occurred in the target cable among the cables connected by the optical switch of the optical branching device that is the adjacent object and for which the presence or absence of a failure has not yet been determined. If a failure has occurred in the target cable (YES), the specific process ends. On the other hand, if no failure has occurred in the target cable (NO), the process branches to step S15.

[0045] In step S15, the integrated monitoring control device 10 refers to the adjacent object information table, identifies the adjacent object connected to the target cable, and the process returns to step S10. In this case, in step S10, the integrated monitoring control device 10 determines whether the adjacent object identified in step S15 is an optical branching device.

[0046] On the other hand, if it is determined in step S10 that the adjacent object is not an optical branching device (NO), that is, if the adjacent object is a landing station, the process branches to step S16. In step S16, the integrated monitoring control device 10 identifies the landing station that is the adjacent object as a landing station capable of controlling the optical branching device to be controlled, and the specific process ends.

[0047] 6 and 7 are executed for landing station T5 and optical branching device BU2, which are adjacent objects of optical branching device BU3 to be controlled, in the example shown in Fig. 12. Since landing station T5 is a landing station, landing station T5 is identified as one of the landing stations that can control optical branching device BU3 to be controlled.

[0048] On the other hand, for optical branching device BU2, optical branching device BU1 is identified as an adjacent object of optical branching device BU2 based on the connection state of the optical switch of optical branching device BU2 and the occurrence of a fault in the cable connected to optical branching device BU2. Next, landing station T3 is identified as an adjacent object of optical branching device BU1 based on the connection state of the optical switch of optical branching device BU1 and the occurrence of a fault in the cable connected to optical branching device BU1. Then, landing station T3 is identified as one of the landing stations that can control the optical branching device BU3 to be controlled.

[0049] 13 is a diagram illustrating main components of the integrated monitoring and control device 10 according to the first exemplary embodiment. The integrated monitoring and control device 10 includes a cable identification unit 101, an adjacent object identification unit 102, and a landing station identification unit 103.

[0050] In the first exemplary embodiment, the cable identification unit 101 identifies a first cable capable of transmitting an optical signal to the first optical branching device based on the fault occurrence status of multiple first cables connected to the first optical branching device to be controlled (step S1 in FIG. 5). Next, the adjacent object identification unit 102 identifies an adjacent object connected to the first optical branching device via the identified first cable (step S2 in FIG. 5). If the identified adjacent object is a landing station, the landing station identification unit 103 identifies this landing station as a landing station capable of controlling the first optical branching device (step S16 in FIG. 6). This makes it possible to identify a landing station capable of controlling the optical branching device to be controlled.

[0051] Also, when the first adjacent object identified by the adjacent object identification unit 102 is the second optical branching device, the adjacent object identification unit 102 performs an adjacent object identification process (steps S13 in FIG. 6 and step S15 in FIG. 7) of identifying an adjacent object connected to the second optical branching device via a second cable capable of transmitting an optical signal to the second optical branching device among a plurality of second cables connected to the second optical branching device. Then, when the adjacent object connected to the second optical branching device is a landing station, the landing station identification unit 103 identifies this landing station as a landing station capable of controlling the first optical branching device. specific Execute the process (step S16 in FIG. 6).

[0052] Thereby, even when there is one optical branching device between the optical branching device to be controlled and the landing station, a landing station capable of controlling the optical branching device to be controlled can be identified.

[0053] Furthermore, the second cable capable of transmitting an optical signal to the second optical branching device is identified based on the connection state of the optical switch included in the second optical branching device and the failure occurrence status of a plurality of second cables connected to the second optical branching device. Thereby, when identifying an adjacent object, a second cable capable of transmitting an optical signal to the second optical branching device can be selected based on the connection state of the optical switch of the second optical branching device and the failure occurrence status of the second cable.

[0054] Furthermore, the second cable capable of transmitting an optical signal to the second optical branching device can be a second cable among a plurality of second cables connected to the second optical branching device that enables transmission of an optical signal to the first optical branching device in the current connection state of the optical switch of the second optical branching device and has no failure.

[0055] As a result, when identifying an adjacent object, it is possible to select a second cable through which an optical signal can be transmitted to the first optical branching device in the current connection state of the optical switch of the second optical branching device. As a result, it is possible to identify an adjacent object without changing the connection state of the optical switch of the second optical branching device. Further, when identifying an adjacent object, it is possible to select a second cable without a failure.

[0056] Furthermore, when the second adjacent object identified by the adjacent object identification unit 102 is a third optical branching device, the adjacent object identification unit 102 executes the adjacent object identification process with the third optical branching device as the second optical branching device. Next, the landing station identification unit 103 executes the above landing station specific process. As a result, even when there are a plurality of optical branching devices between the optical branching device to be controlled and the landing station, it is possible to identify a landing station capable of controlling the optical branching device to be controlled.

[0057] Furthermore, the notification unit 104 notifies the landing station identified by the landing station identification unit 103. As a result, the operator of the integrated monitoring and control device 10 can grasp the identified landing station.

[0058] Furthermore, the landing station control unit 105 prohibits the transmission of control information to the first optical branching device to the terminal device of a landing station other than the landing station identified by the landing station identification unit 103. As a result, it is possible to stop the transmission of control information from the terminal device of a landing station other than the landing station identified by the landing station identification unit 103 to the optical branching device to be controlled.

[0059] <Second Embodiment> FIG. 14 is a diagram showing an example of the undersea cable system 1 according to an exemplary second embodiment. The undersea cable system 1 according to the second embodiment includes a control center T0 where the integrated monitoring and control device 10 is installed, one or more landing stations T1 to T6, one or more optical branching devices BU1 to BU4, and an optical branching and insertion device R1. The optical branching and insertion device R1 is a device that selectively transmits optical signals. Note that the undersea cable system 1 can include any number of optical branching and insertion devices R1.

[0060] In the exemplary second embodiment, a second optical branching device, a landing station, and an optical branching and insertion device other than the first optical branching device can be adjacent objects. Hereinafter, the description will focus on the differences from the first embodiment.

[0061] FIGS. 15 to 18 are flowcharts showing an example of the processing executed by the integrated monitoring and control device 10 according to an exemplary second embodiment. In step S20, the integrated monitoring and control device 10 identifies a cable capable of transmitting an optical signal to the optical branching device to be controlled based on the failure occurrence status of a plurality of cables connected to the optical branching device to be controlled.

[0062] In step S21, the integrated monitoring and control device 10 refers to the adjacent object information table and identifies an adjacent object connected to the cable identified in step S20.

[0063] FIG. 19 is an example of an adjacent object information table according to an exemplary second embodiment. The adjacent object information table registers adjacent objects on the A branch side, B branch side, and C branch side of each of the optical branching devices BU1 to BU4. Here, assume that the optical branching device BU3 is the optical branching device to be controlled. Referring to the adjacent object information table shown in FIG. 19, the adjacent object on the A branch side of the optical branching device BU3 is the optical branching device BU2, and the adjacent object on the C branch side is the optical branching and insertion device R1. In this case, the integrated monitoring and control device 10 identifies the optical branching device BU2 as the adjacent object on the A branch side of the optical branching device BU3 and the optical branching and insertion device R1 as the adjacent object on the C branch side of the optical branching device BU3.

[0064] In step S22, the integrated monitoring and control device 10 executes the specific processing shown in FIGS. 16 to 18 for each adjacent object specified in step S21, and the processing in FIG. 15 ends.

[0065] FIGS. 16 to 18 are diagrams showing an example of the specific processing executed by the integrated monitoring and control device 10 according to the second embodiment. In step S23, the integrated monitoring and control device 10 determines whether the specified adjacent object is an optical branching device. If the specified adjacent object is an optical branching device (YES), the processing branches to step S24.

[0066] In step S24, the integrated monitoring and control device 10 refers to the optical switch connection state table and determines the connection state of the optical switch of the optical branching device that is the specified adjacent object. If the connection state of the optical switch is trunk through, the processing branches to step S25.

[0067] In step S25, the integrated monitoring and control device 10 refers to the failure occurrence situation management table and determines whether a failure has occurred in the cables connected by the optical switch that are the objects for which the presence or absence of a failure has not yet been determined. If a failure has occurred in the target cable (YES), the specific processing ends. On the other hand, if no failure has occurred in the target cable (NO), the processing branches to step S26.

[0068] In step S26, the integrated monitoring and control device 10 refers to the adjacent object information table, specifies the adjacent object connected to the target cable, and the processing returns to step S23. In this case, in step S23, the integrated monitoring and control device 10 determines whether the adjacent object specified in step S25 is an optical branching device.

[0069] On the other hand, if it is determined in step S24 that the connection state of the optical switch is a branch-through, the process branches to step S27. In step S27, the integrated monitoring control device 10 refers to the failure occurrence status management table and determines whether a failure has occurred in the cables connected by the optical switch that have not yet been determined for the presence or absence of a failure. If a failure has occurred in the target cable (YES), the specific process ends. On the other hand, if no failure has occurred in the target cable (NO), the process branches to step S28.

[0070] In step S28, the integrated monitoring control device 10 refers to the adjacent object information table, identifies the adjacent object connected to the target cable, and the process returns to step S23. In this case, in step S23, the integrated monitoring control device 10 determines whether the adjacent object identified in step S28 is an optical branching device.

[0071] On the other hand, if it is determined in step S23 that the adjacent object is not an optical branching device (NO), the process branches to step S29. In step S29, the integrated monitoring control device 10 determines whether the adjacent object is a landing station. If the adjacent object is a landing station (YES), in step S30, the integrated monitoring control device 10 identifies the landing station, which is the adjacent object, as a landing station capable of controlling the optical branching device to be controlled, and the specific process ends. On the other hand, if the adjacent object is not a landing station (NO), that is, if the adjacent object is an optical branching insertion device, the process branches to step S31.

[0072] In step S31, the integrated monitoring control device 10 refers to the transmission setting information of the optical branching insertion device, which is the adjacent object, and determines the transmission setting of the optical branching insertion device. FIG. 20 is a diagram showing an example of the transmission setting information of the optical branching insertion device. The transmission setting information of the optical branching insertion device is information specifying whether the optical branching insertion device transmits an optical signal.

[0073] When it is determined in step S31 that the transmission setting of the optical branching insertion device is non-transmissible, the specific process ends. On the other hand, when it is determined in step S31 that the transmission setting of the optical branching insertion device is transmissible, the process branches to step S32.

[0074] In step S32, the integrated monitoring and control device 10 refers to the failure occurrence status management table in which the failure occurrence status of the cable connected to the optical branching insertion device as shown in FIG. 21 is registered, and determines whether or not a failure has occurred in the cable on the landing station side of the optical branching insertion device.

[0075] If it is determined in step S32 that a failure has occurred in the cable on the landing station side (YES), the specific process ends. On the other hand, if no failure has occurred in the cable on the landing station side (NO), in step S33, the integrated monitoring and control device 10 refers to the adjacent object information table in which the adjacent objects of the optical branching insertion device as shown in FIG. 22 are registered, and specifies the adjacent object connected to the cable on the landing station side.

[0076] When the adjacent object is specified in step S33, the process returns to step S23. In this case, the integrated monitoring and control device 10 determines whether or not the adjacent object specified in step S33 is an optical branching device.

[0077] FIG. 23 is a diagram showing an example of the undersea cable system 1 when a cable failure occurs according to an exemplary second embodiment. As shown in FIG. 23, when a failure occurs in the cable between the optical branching device BU3 and the optical branching device BU4, it is assumed that the optical branching device BU3 is the optical branching device to be controlled. In this case, the adjacent objects of the optical branching device BU3 are the optical branching device BU2 and the optical branching insertion device R1. When the transmission setting information of the optical signal of the optical branching insertion device R1 indicates transmissibility and no failure has occurred in the cable between the optical branching insertion device R1 and the landing station T5, the landing station T5 is specified as the landing station capable of controlling the optical branching device BU3 to be controlled.

[0078] In an exemplary second embodiment, the adjacent objects connected to the first optical branching device may include an optical branching device other than the first optical branching device, a landing station, and an optical branching insertion device. When the specified adjacent object is an optical branching insertion device connected to the first optical branching device, and the optical branching insertion device is capable of transmitting an optical signal and there is no failure in the cable connected to the optical branching insertion device, the landing station specifying unit 103 specifies the landing station connected via the cable connected to the optical branching insertion device as the landing station capable of controlling the first optical branching device. In other words, the landing station connected via a cable without a failure connected to an optical branching insertion device capable of transmitting an optical signal is specified as the landing station capable of controlling the optical branching device to be controlled. Thereby, in a submarine cable system including an optical branching insertion device, a landing station capable of controlling the optical branching device to be controlled can be specified.

[0079] Further, when the specified adjacent object is an optical branching insertion device connected to an optical branching device other than the first optical branching device, and the optical branching insertion device is capable of transmitting an optical signal and there is no failure in the cable connected to the optical branching insertion device, the landing station specifying unit 103 specifies the landing station connected via the cable connected to the optical branching insertion device as the landing station capable of controlling the first optical branching device. Thereby, in a submarine cable system including an optical branching insertion device, even when there is one or more optical branching devices between the optical branching device to be controlled and the landing station, a landing station capable of controlling the optical branching device to be controlled can be specified.

[0080] In the above example, when the landing station identification program 100 is loaded into a computer, it includes a set of instructions (or software code) for causing the computer to perform one or more functions described in the embodiments. The landing station identification program 100 may be stored in a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, the computer-readable medium or tangible storage medium includes random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drive (SSD), or other memory technologies, CD-ROM, digital versatile disk (DVD), Blu-ray (registered trademark) disk, or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage, or other magnetic storage devices. The program may be transmitted on a transitory computer-readable medium or a communication medium. By way of example and not limitation, the transitory computer-readable medium or communication medium includes electrical, optical, acoustic, or other forms of propagated signals.

[0081] The present disclosure is not limited to the above-described embodiments, and can be appropriately modified without departing from the spirit of the present disclosure.

[0082] Some or all of the above embodiments may be described as follows, but are not limited thereto. (Appendix 1) Cable identification means for identifying a first cable capable of transmitting an optical signal to the first optical branching device based on the failure occurrence status of a plurality of first cables connected to the first optical branching device; Adjacent object identification means for identifying an adjacent object connected to the first optical branching device via the identified first cable, wherein the adjacent object connected to the first optical branching device includes a second optical branching device other than the first optical branching device and a landing station; adjacent object identification means; When the specified adjacent object is the landing station, a landing station specifying means for specifying the landing station as a landing station capable of controlling the first optical branching device A landing station specifying device including (Appendix 2) When the specified adjacent object is the second optical branching device, The adjacent object specifying means executes an adjacent object specifying process for specifying an adjacent object connected to the second optical branching device via a second cable capable of transmitting an optical signal to the second optical branching device among a plurality of second cables connected to the second optical branching device, The adjacent object connected to the second optical branching device includes a third optical branching device other than the first optical branching device and the second optical branching device, and a landing station, When the adjacent object connected to the second optical branching device is the landing station, the landing station specifying means specifies the landing station as a landing station capable of controlling the first optical branching device specific The landing station specifying device according to Appendix 1, which executes a process. (Appendix 3) The second cable capable of transmitting an optical signal to the second optical branching device is specified based on the connection state of an optical switch included in the second optical branching device and the failure occurrence status of a plurality of second cables connected to the second optical branching device. The landing station specifying device according to Appendix 2. (Appendix 4) The second cable capable of transmitting an optical signal to the second optical branching device is a second cable among a plurality of second cables connected to the second optical branching device, in which transmission of an optical signal to the first optical branching device is possible in the current connection state of the optical switch of the second optical branching device and no failure has occurred. The landing station specifying device according to Appendix 3. (Appendix 5) When the specified adjacent object is the third optical branching device, The adjacent object specifying means executes the adjacent object specifying process with the third optical branching device as the second optical branching device, The beach landing station identification means is the beach landing station specific that executes the process, and is the beach landing station identification device according to any one of Appendices 2 to 4. (Appendix 6) The adjacent objects connected to the first optical branching device include an optical branching device other than the first optical branching device, the beach landing station, and an optical branching insertion device. When the identified adjacent object is the optical branching insertion device connected to the first optical branching device, and the optical branching insertion device can transmit an optical signal and there is no failure in the cable connected to the optical branching insertion device, The beach landing station identification means identifies the beach landing station connected via the cable connected to the optical branching insertion device as the beach landing station that can control the first optical branching device, and is the beach landing station identification device according to any one of Appendices 1 to 5. (Appendix 7) When the identified adjacent object is the optical branching insertion device connected to an optical branching device other than the first optical branching device, and the optical branching insertion device can transmit an optical signal and there is no failure in the cable connected to the optical branching insertion device, The beach landing station identification means identifies the beach landing station connected via the cable connected to the optical branching insertion device as the beach landing station that can control the first optical branching device, and is the beach landing station identification device according to Appendix 6. (Appendix 8) The beach landing station identification device further includes a notification means for notifying the beach landing station identified by the beach landing station identification means, and is the beach landing station identification device according to any one of Appendices 1 to 7. (Appendix 9) The beach landing station identification device further includes a beach landing station control means for prohibiting the transmission of control information to the first optical branching device to the end station device of a beach landing station other than the beach landing station identified by the beach landing station identification means, and is the beach landing station identification device according to any one of Appendices 1 to 8. (Appendix 10) A computer identifies a first cable capable of transmitting an optical signal to the first optical branching device based on the failure occurrence status of a plurality of first cables connected to the first optical branching device. Identifying an adjacent object connected to the first optical branching device via the identified first cable; adjacent objects connected to the first optical branching device include a second optical branching device other than the first optical branching device and a landing station; If the identified neighboring object is the landing station, identify the landing station as a landing station capable of controlling the first optical branching device. Method for identifying landing stations. (Appendix 11) When the identified adjacent object is a second optical branching device, The computer executing an adjacent object identification process to identify an adjacent object connected to the second optical branching device via a second cable capable of transmitting an optical signal to the second optical branching device, among a plurality of second cables connected to the second optical branching device; adjacent objects connected to the second optical branching device include a third optical branching device other than the first optical branching device and the second optical branching device, and a landing station; 11. The landing station identification method according to claim 10, wherein, if an adjacent object connected to the second optical branching device is the landing station, the landing station is identified as a landing station that can control the first optical branching device. (Appendix 12) When the identified adjacent object is the third optical branching device, The computer execute the adjacent object identification process using the third optical branching device as the second optical branching device; The landing station specific 12. The landing station identification method of claim 11, wherein the method performs processing. (Appendix 13) neighboring objects connected to the first optical branching device include optical branching devices other than the first optical branching device, the landing station, and an optical add / drop multiplexer; When the specified adjacent object is the optical branching insertion device connected to the first optical branching device, when the optical branching insertion device can transmit an optical signal and there is no failure in the cable connected to the optical branching insertion device, The computer Identifying the landing station connected via the cable connected to the optical branching insertion device as the landing station capable of controlling the first optical branching device, the landing station identification method according to any one of Appendices 10 to 12. (Appendix 14) When the specified adjacent object is the optical branching insertion device connected to an optical branching device other than the first optical branching device, when the optical branching insertion device can transmit an optical signal and there is no failure in the cable connected to the optical branching insertion device, The computer Identifying the landing station connected via the cable connected to the optical branching insertion device as the landing station capable of controlling the first optical branching device, the landing station identification method according to Appendix 13. (Appendix 15) For the computer, Based on the failure occurrence status of a plurality of first cables connected to the first optical branching device, specifying a first cable capable of transmitting an optical signal to the first optical branching device, Specifying an adjacent object connected to the first optical branching device via the specified first cable, The adjacent object connected to the first optical branching device includes a second optical branching device other than the first optical branching device and a landing station, When the specified adjacent object is the landing station, specifying the landing station as the landing station capable of controlling the first optical branching device, A non-temporary recording medium on which a landing station identification program is recorded. (Appendix 16) When the specified adjacent object is a second optical branching device, For the computer, Execute an adjacent object identification process for identifying an adjacent object connected to the second optical branching device via a second cable capable of transmitting an optical signal among a plurality of second cables connected to the second optical branching device. The adjacent objects connected to the second optical branching device include a third optical branching device other than the first optical branching device and the second optical branching device, and a landing station. When the adjacent object connected to the second optical branching device is the landing station, cause the landing station to be identified as a landing station capable of controlling the first optical branching device, the non-transitory recording medium according to Supplementary Note 15. (Supplementary Note 17) When the identified adjacent object is the third optical branching device, Cause the computer to Execute the adjacent object identification process with the third optical branching device as the second optical branching device, and cause the landing station specific to execute the process, the non-transitory recording medium according to Supplementary Note 16. (Supplementary Note 18) The adjacent objects connected to the first optical branching device include an optical branching device other than the first optical branching device, the landing station, and an optical branching insertion device. When the identified adjacent object is the optical branching insertion device connected to the first optical branching device, and when the optical branching insertion device is capable of transmitting an optical signal and there is no failure in the cable connected to the optical branching insertion device, Cause the computer to Identify the landing station connected via the cable connected to the optical branching insertion device as a landing station capable of controlling the first optical branching device, the non-transitory recording medium according to any one of Supplementary Notes 15 to 17. (Supplementary Note 19) When the identified adjacent object is the optical branching insertion device connected to an optical branching device other than the first optical branching device, and when the optical branching insertion device is capable of transmitting an optical signal and there is no failure in the cable connected to the optical branching insertion device, to the computer, 19. The non-transitory recording medium of claim 18, wherein a landing station connected via a cable connected to the optical add / drop multiplexer is identified as a landing station that can control the first optical drop device. [Explanation of symbols]

[0083] 1 Submarine cable system 10 Integrated monitoring and control device 11 processors 12 Communication Interface 13 Storage device 100 Landing Station Specific Program 101 Cable Identification Section 102 adjacent object identification unit 103 Landing Station Specific Department 104 Notification Department 105 Landing Station Control Unit BU1~BU4 Optical branching device A-C ports R1 Optical Add-Drop Device T0 Mission Control Center T1~T6 Landing Station T11 Monitoring and Control Equipment T12 terminal equipment T13 Transmission Line Monitoring Device T31 Monitoring and Control Equipment T32,T33 terminal equipment T34 Transmission Line Monitoring Device

Claims

1. Cable identification means for identifying a first cable capable of transmitting an optical signal to the first optical branching device based on the failure occurrence status of a plurality of first cables connected to the first optical branching device; Adjacent object identification means for identifying an adjacent object connected to the first optical branching device via the identified first cable, wherein the adjacent object connected to the first optical branching device includes a second optical branching device other than the first optical branching device and a landing station; Adjacent object identification means; Landing station identification means for identifying the landing station as a landing station capable of controlling the first optical branching device when the identified adjacent object is the landing station A landing station identification device including:

2. When the identified adjacent object is a second optical branching device, The adjacent object identification means executes an adjacent object identification process for identifying an adjacent object connected to the second optical branching device via a second cable capable of transmitting an optical signal to the second optical branching device among a plurality of second cables connected to the second optical branching device; The adjacent object connected to the second optical branching device includes a third optical branching device other than the first optical branching device and the second optical branching device and a landing station; The landing station identification means executes a landing station identification process for identifying the landing station as a landing station capable of controlling the first optical branching device when the adjacent object connected to the second optical branching device is the landing station. The landing station identification device according to claim 1.

3. The second cable capable of transmitting an optical signal to the second optical branching device is identified based on the connection state of an optical switch included in the second optical branching device and the failure occurrence status of a plurality of second cables connected to the second optical branching device. The landing station identification device according to claim 2.

4. The second cable capable of transmitting an optical signal to the second optical branching device is a second cable among a plurality of second cables connected to the second optical branching device, in which the transmission of an optical signal to the first optical branching device is possible in the current connection state of the optical switch of the second optical branching device and no failure has occurred. The landing station identification device according to claim 3.

5. When the identified adjacent object is the third optical branching device, The adjacent object specifying means executes the adjacent object specifying process using the third optical branching device as the second optical branching device. The landing station specifying device according to any one of claims 2 to 4, wherein the landing station specifying means executes the landing station specifying process.

6. The adjacent objects connected to the first optical branching device include an optical branching device other than the first optical branching device, the landing station, and an optical branching insertion device. When the specified adjacent object is the optical branching insertion device connected to the first optical branching device, the optical branching insertion device is capable of transmitting an optical signal, and when there is no failure in the cable connected to the optical branching insertion device. The landing station specifying device according to any one of claims 1 to 5, wherein the landing station specifying means specifies a landing station connected via a cable connected to the optical branching insertion device as a landing station capable of controlling the first optical branching device.

7. When the specified adjacent object is the optical branching insertion device connected to an optical branching device other than the first optical branching device, the optical branching insertion device is capable of transmitting an optical signal, and when there is no failure in the cable connected to the optical branching insertion device. The landing station specifying device according to claim 6, wherein the landing station specifying means specifies a landing station connected via a cable connected to the optical branching insertion device as a landing station capable of controlling the first optical branching device.

8. The landing station specifying device according to any one of claims 1 to 7, further comprising notification means for notifying the landing station specified by the landing station specifying means.

9. A computer specifies a first cable capable of transmitting an optical signal to the first optical branching device based on a failure occurrence status of a plurality of first cables connected to the first optical branching device. specifies an adjacent object connected to the first optical branching device via the specified first cable. The adjacent objects connected to the first optical branching device include a second optical branching device other than the first optical branching device and a landing station. When the specified adjacent object is the landing station, the landing station is specified as a landing station capable of controlling the first optical branching device. Landing station specifying method.

10. For a computer Based on the failure occurrence status of a plurality of first cables connected to the first optical branching device, identify a first cable capable of transmitting an optical signal to the first optical branching device. Identify an adjacent object connected to the first optical branching device via the identified first cable. The adjacent objects connected to the first optical branching device include a second optical branching device other than the first optical branching device and a landing station. When the identified adjacent object is the landing station, identify the landing station as a landing station capable of controlling the first optical branching device. Landing station identification program.

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