WO2023286267A1 - 光ノード間の接続情報を管理するシステム及び方法 - Google Patents

光ノード間の接続情報を管理するシステム及び方法 Download PDF

Info

Publication number
WO2023286267A1
WO2023286267A1 PCT/JP2021/026748 JP2021026748W WO2023286267A1 WO 2023286267 A1 WO2023286267 A1 WO 2023286267A1 JP 2021026748 W JP2021026748 W JP 2021026748W WO 2023286267 A1 WO2023286267 A1 WO 2023286267A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
node
connection information
function unit
management function
Prior art date
Application number
PCT/JP2021/026748
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
ひろし 渡邉
良 小山
友裕 川野
達也 藤本
和英 中江
和典 片山
Original Assignee
日本電信電話株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP2023534566A priority Critical patent/JPWO2023286267A1/ja
Priority to PCT/JP2021/026748 priority patent/WO2023286267A1/ja
Publication of WO2023286267A1 publication Critical patent/WO2023286267A1/ja

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Definitions

  • the present disclosure mainly relates to a system of a connection state management method and confirmation method between optical line switching nodes, and a connection state management method and confirmation method between optical line switching nodes in an optical fiber network.
  • optical fiber cores can be connected to arbitrary routes in order to efficiently use the equipment during the opening and maintenance of the network.
  • Optical line switching such as changing the route and changing the route is performed at a certain frequency. Normally, such work involves going to the site and physically switching connections, but a technology has been proposed in which switching is performed by remotely operating an optical cross-connect switch (see, for example, Non-Patent Document 1). .).
  • An optical port monitoring function unit is installed in the optical line switching node, and has a structure capable of reading the intensity of the optical signal incident from the port. Also, the optical line switching node has a structure that converts the optical power supply light into electricity, stores the electricity, and drives the optical port monitoring function unit and the optical cross-connect switch with the stored electricity.
  • the optical line switching node is structured to be driven by optical power supply light, but it is assumed that it may not always be in a state where it is sufficiently stored. It is desirable to suppress the use of such as.
  • An object of the present disclosure is to enable management and confirmation of the connection state of each port of an optical line switching node even when an optical line is switched in a network configured with optical line switching nodes.
  • the systems and methods of the present disclosure include: A system for managing connection information between optical nodes in an optical fiber network in which a plurality of optical nodes are connected, storing the connection state data of the port inside a single optical node and the connection time in the intra-node connection information management function unit; storing data on the connection state of ports between adjacent optical nodes in an adjacent node connection information management function unit; Data relating to the connection state of adjacent optical nodes on the optical fiber network, which is stored in the inter-node connection information management function unit, is generated from the intra-node connection information management function unit and the adjacent inter-node connection information management function unit. It is characterized by
  • FIG. 1 shows a system configuration example of the present disclosure.
  • the system of the present disclosure is an optical fiber network in which ports of optical line switching nodes (hereinafter referred to as optical nodes) 91 are directly connected via optical fibers 92 .
  • optical nodes 91#0 to 91#3 are connected in a loop
  • FIG. 2 each of the optical nodes 91#1 to 91#3 is provided with an optical port monitoring function unit 11, and has a structure capable of reading the intensity of the optical signal entering from the port.
  • the optical node 91#0 is installed in an environment where power can be supplied, and an optical test device 95 and an optical power meter 85, which will be described later, are arranged. As shown in FIG. 2, the optical nodes 91#1 to 91#3 convert the optical power supply light into electricity and store it, and the stored power is used to drive the optical port monitoring function unit 11 and the optical cross-connect switch 12. A processor 13 is provided.
  • FIG. 3 shows an example of the configuration of each management function that manages the optical node 91 connected to the optical fiber network and the connection state between the nodes.
  • the system of the present disclosure includes an intra-node connection information management function unit 21, an adjacent node connection information management function unit 22, and inter-node connection information via an optical node 91#0 installed in a communication building and a network 96.
  • a management function unit 23 is installed.
  • optical nodes 91 are arranged on the network. For example, in the case of FIG. 3, it is possible to grasp that optical nodes 91 numbered 0, 1, 2, 3, and 0 are arranged in a loop and connected. Also, the 0th optical node 91#0 is the optical node 0, the 1st optical node 91#1 is the optical node 1, the second optical node 91#2 is the optical node 2, and the 3rd optical node 91 #3 may be referred to as optical node #3.
  • the intra-node connection information management function unit 21 stores data on the connection status of the ports inside a single optical node and the connection time.
  • FIG. 4 shows an example of information stored in the intra-node connection information management function 21.
  • the intra-node connection information management function unit 21 instructs the optical node 91 which port number and which number are connected by the internal optical cross-connect switch 12 and the time at which the connection instruction is given to the optical node 91. to store
  • the intra-node connection information management function unit 21 assumes that port 1 and port 101 are connected in optical node No. 1, and the time at which these were connected is 22:01:59 on January 01, 2021. store something.
  • the adjacent node connection information management function unit 22 stores data on the connection state of ports between adjacent optical nodes 91 .
  • FIG. 5 shows an example of information stored in the adjacent node connection information management function unit 23.
  • the adjacent node connection information management function unit 22 stores information as to which port number and which port number are physically connected between the adjacent optical nodes 91 by an optical cable or the like. For example, the adjacent node connection information management function unit 22 stores that the port 101 of the optical node number 1 and the port 1 of the node number 2 are connected.
  • the adjacent node connection information management function unit 22 performs the following operations on optical nodes No. 0 and No. 1, optical nodes No. 1 and No. 2, and optical nodes No. 3 and No. 0. Stores connection information between adjacent nodes. It should be noted that this adjacent node connection information is based on the premise that the adjacent optical nodes 91 are fixedly connected via an optical cable, and there is no connection change other than manual switching. Therefore, a table is created and stored when the adjacent optical nodes 91 are connected.
  • the inter-node connection information management function unit 23 stores information regarding the connection status of adjacent optical nodes 91 on the optical fiber network.
  • FIG. 6 shows an example of information stored in the node connection information management function 23.
  • the inter-node connection information management function unit 23 generates connection information about the connection state of each port of each optical node 91 and the connection state when a plurality of optical nodes are interconnected to form an optical fiber network. Stores time information. For this information, a table is created from the intra-node connection information management function unit 21 and the inter-adjacent node connection information management function unit 22 and stored. Further, when the connection information is confirmed by an optical method or the like, which will be described later, information related to the connection information may also be stored in this table.
  • connection information between adjacent optical nodes 91 in addition to connection information between adjacent optical nodes 91, cable information connected between the optical nodes 91 is also stored in the adjacent node connection information management function unit 22 as shown in FIG. Store. 8, the node-to-node connection information management function unit 23 includes identification information such as the numbers to which the cable cores between the optical nodes 91 are connected.
  • a table is created from the intra-node connection information management function unit 21 and the inter-adjacent node connection information management function unit 22 to store the stored information.
  • FIG. 9 shows a system configuration example of this embodiment.
  • the optical node 91#0 is connected through an optical coupler 93 and a fiber selector 94 to an optical testing device 95 that emits test light.
  • a third embodiment for implementing the present disclosure will be described in detail below.
  • this is a method for sequentially generating information stored in the intra-node connection information management function unit 21 .
  • test light is inserted into port 1 of optical node 0 shown in FIG.
  • the optical port monitoring function unit 11 measures the optical power and confirms whether or not there is a change in the optical power, thereby confirming communication. to check the actual connection state at the optical node No. 1.
  • the test light is inserted using an optical test device 95, a fiber selector 94, and an optical coupler 93 as shown in FIG.
  • the optical port monitoring function unit 11 of optical node 2 if the port on the output side is a loop (hereinafter referred to as an upper loop) in which optical nodes 0 to 3 of numbers 101 to 150 are connected, the optical port monitoring function unit 11 of optical node 2 Similarly, the presence or absence of optical power is measured for all ports by the optical port monitoring function unit 11 to confirm communication and to confirm connection information within the optical node 91 . This is advanced to the optical node 3, further to the optical node 0, and to the optical node 91 connected to the upper loop, the presence or absence of the optical power is measured by receiving the test light, and the communication is confirmed. .
  • the cross-connect switches 12 of the optical nodes 91#0 to 91#2 are switched to establish routes SR1 and SR2 between the optical nodes 91. , SR3, SR4, and SR5 are sequentially connected, and the connection state thereof is confirmed.
  • Step S31 As for the route SR1, since the ports of the optical nodes No. 0 and No. 1 are fixedly connected, the optical port monitoring function unit 11 on the side of the route SR1 of the optical node No. 1 confirms communication. Communication confirmation is performed by connecting the optical test equipment 95 to the optical port connected to the optical route SR1 using the optical coupler 93 and the fiber selector 94, and transmitting the test light ( CW light, etc.) is inserted. Then, it is confirmed based on whether the optical port monitoring function unit 11 of the optical node No. 1 changes the optical power due to the presence or absence of the test light.
  • Step S32 Next, switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 1, give an instruction to switch the connection to the route SR2, connect the route SR1, route SR2, and route SR3, and connect the route SR1, route SR2, and route SR3.
  • the connection information of the two ports of the optical node No. 1 to which the route SR2 is connected is updated in the connection information management function unit 21 .
  • Step S33 Next, the optical port monitoring function units 11 of the optical nodes No. 1 and No. 2 connected to the route SR2 each confirm communication in the same manner as described above.
  • Step S34 Next, switch the cross-connect switches 12 from the optical node No. 0 to the optical node No. 2, give an instruction to switch the connection to the route SR4, connect the route SR3, the route SR4, and the route SR5, and The connection information of the two ports of the optical node No. 2 to which the route SR4 is connected is updated in the connection information management function unit 21 .
  • Step S35 Finally, the optical port monitoring function unit 11 of the optical node No. 2 connected to the route SR5 confirms communication in the same manner as described above. Further, the node connection information management function unit 23 described in the first and second embodiments reflects the connection information confirmation.
  • the inter-node connection confirmation method of the third embodiment is a reliable confirmation method because the connections between the optical nodes 91 are confirmed one by one.
  • Step S41 Switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 1, give an instruction to switch the connection to the route SR2, connect the routes SR1, SR2, and SR3, and the intra-node connection information management function unit 21, the connection information of the two ports of the optical node No. 1 to which the route SR2 is connected is updated.
  • Step S42 Next, switch the cross-connect switches 12 from optical node No. 0 to optical node No. 2, issue an instruction to switch connection to route SR4, connect routes SR3, SR4, and SR5, and connect intra-node connection information.
  • the connection information of the two ports of the optical node No. 2 to which the route SR4 is connected to the management function unit 21 is updated.
  • Step S43 Finally, the optical port monitoring function unit 11 of the optical node No. 2 connected to the route SR5 confirms communication in the same manner as in the third embodiment. Further, the node connection information management function unit 23 described in the first and second embodiments reflects the connection information confirmation.
  • the inter-node connection confirmation method of the fourth embodiment has the advantage that it does not take much time and consumes less power in the optical node 91 because the connection confirmation is performed only at the end. However, if communication cannot be confirmed, the abnormal portion may be isolated.
  • FIG. 11 shows a system configuration example of this embodiment.
  • the optical node 91 # 0 is connected to the optical power meter 85 through the optical coupler 83 and the fiber selector 84 .
  • a fifth embodiment for implementing the present disclosure will be described in detail below.
  • the cross-connect switches 12 of the optical nodes 91 are switched to connect the routes SR1, SR2, SR3, SR4, and SR5 between the optical nodes 91 in order, and the connections A method for checking the status will be explained.
  • Step S51 Switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 1, give an instruction to switch the connection to the route SR2, connect the routes SR1, SR2, and SR3, and the intra-node connection information management function unit 21, the connection information of the two ports of the optical node No. 1 to which the route SR2 is connected is updated.
  • Step S52 Next, the cross-connect switches 12 of the optical nodes No. 0 to No. 3 are switched as routes dedicated to the test light, and an instruction to switch the connection to the test light route TR2 is given, and the test light routes TR1, TR2, In addition to connecting TR3, the intra-node connection information management function unit 21 updates the connection information of the two ports of the optical node No. 3 to which the test optical route TR2 is connected.
  • Step S53 Next, the cross-connect switches 12 of optical node No. 0 to optical node No. 2 are switched, and an instruction to switch the connection to the test optical route TR4 is given, and the route SR3, the test optical route TR4, and the test optical route TR3 are switched.
  • the intra-node connection information management function unit 21 updates the connection information of the two ports of the optical node No. 2 to which the test optical route TR4 is connected.
  • Step S54 Next, test light (CW light, etc.) is inserted from the optical test equipment 95 using the optical coupler 93 and the fiber selector 94 to the optical port connected to the test light route TR1. At this time, the optical coupler 83 and the fiber selector 84 are used to connect the optical power meter 85 to the optical port connected to the optical route SR1. Then, communication is confirmed by checking whether the optical power is changed by the optical power meter 85 depending on the presence or absence of the test light. Incidentally, each connection to the optical test device 95 and the optical power meter 85 may be reversed.
  • Step S55 Next, switch the cross-connect switches 12 from optical node No. 0 to optical node No. 2, issue an instruction to switch connection to route SR4, connect routes SR3, SR4, and SR5, and connect intra-node connection information.
  • the connection information of the two ports of the optical node No. 2 to which the route SR4 is connected to the management function unit 21 is updated.
  • Step S56 Finally, the optical port monitoring function unit 11 of the optical node No. 2 connected to the route SR5 confirms communication in the same manner as described above. Further, the node connection information management function unit 23 described in the first and second embodiments reflects the connection information confirmation.
  • the inter-node connection confirmation method of the fifth embodiment is a more detailed confirmation method than the fourth embodiment because it confirms the connectivity of a part of the route. Since the connection state between the optical nodes 91 can be confirmed without using the unit 11, this method can suppress the energy consumption of the optical nodes 91. FIG. It can also serve as an alternative means when the optical port monitoring function unit 11 of the optical node 91 cannot be used due to failure or the like.
  • Step S61 Switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 1, give an instruction to switch the connection to the route SR2, connect the routes SR1, SR2, and SR3, and the intra-node connection information management function unit. 21, the connection information of the two ports of the optical node No. 1 to which the route SR2 is connected is updated.
  • Step S62 Next, the cross-connect switches 12 of the optical nodes No. 0 to No. 3 are switched as routes dedicated to the test light, and an instruction to switch the connection to the test light route TR2 is given, and the test light routes TR1, TR2, In addition to connecting TR3, the intra-node connection information management function unit 21 updates the connection information of the two ports of the optical node No. 3 to which the test optical route TR2 is connected. It is assumed that each test optical route uses a port with a specific number, eg, the oldest number.
  • Step S63 Next, the cross-connect switches 12 of optical node No. 0 to optical node No. 2 are switched, an instruction to switch the connection to the test optical route TR4 is given, and the route SR3, the test optical route TR4, and the test optical route TR3 are switched.
  • the intra-node connection information management function unit 21 updates the connection information of the two ports of the optical node No. 2 to which the test optical route TR4 is connected.
  • Step S64 Next, test light (CW light, etc.) is inserted from the optical test equipment 95 using the optical coupler 93 and the fiber selector 94 to the optical port connected to the test light route TR1.
  • An optical power meter 85 using an optical coupler 83 and a fiber selector 84 for the optical port connected to the optical route SR1 checks whether or not there is a change in optical power depending on the presence or absence of the test light. Incidentally, each connection to the optical test device 95 and the optical power meter 85 may be reversed.
  • Step S65 Next, switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 2, give an instruction to switch the connection to the route SR4, connect SR3 and SR4, and connect the intra-node connection information management function unit. 21, the connection information of the two ports of the optical node No. 2 connected to the route SR4 is updated.
  • Step S66 Finally, the optical port monitoring function unit 11 of the optical node No. 2 connected to the route SR4 confirms communication in the same manner as described above. Further, the node connection information management function unit 23 described in the first and second embodiments reflects the connection information confirmation.
  • the inter-node connection confirmation method of the sixth embodiment is a method in which routes and core wires for test light are secured, compared to the confirmation method of the fifth embodiment.
  • the fifth embodiment may not be implemented if, for example, all core wires between the optical nodes 91 are used, but the sixth embodiment can be implemented without fail.
  • test light route is connected in advance in a loop from optical nodes 0 to 1, 2, 3, and 0. It is assumed that each test optical route uses a port with a specific number, eg, the oldest number.
  • Step S71 Switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 1, issue an instruction to switch the connection to the test optical route TR6, and connect the test optical route TR7, the test optical route TR6, and the route SR3. , update the connection information of the two ports of the optical node No. 1 to which the test optical route TR6 is connected to the intra-node connection information management function unit 21 .
  • Step S72 Next, switch the cross-connect switches 12 of the optical nodes No. 0 to No. 2, instruct to switch the connection to the test optical route TR4, route SR3, test optical route TR4, test optical route TR3, and test.
  • the connection information of the two ports of the optical node No. 2 to which the test optical route TR4 is connected to the intra-node connection information management function unit 21 is updated.
  • Step S73 Next, for the optical port connected to the test light route TR1, depending on whether or not the test light (such as CW light) is inserted from the optical test equipment 95, the optical port connected to the test light route TR7 is Then, the optical power meter 85 checks whether the optical power changes or not. Incidentally, each connection to the optical test device 95 and the optical power meter 85 may be reversed. Further, the node connection information management function unit 23 described in the first and second embodiments reflects the connection information confirmation.
  • the test light such as CW light
  • Step S74 Next, switch the cross-connect switch 12 from the optical node No. 0 to the optical node No. 1, give an instruction to switch the connection to the route SR2, connect the routes SR1, SR2, and SR3, and connect the intra-node connection information.
  • the connection information of the two ports of the optical node No. 1 to which the SR2 is connected to the management function unit 21 is updated.
  • Step S75 Next, switch the cross-connect switches 12 from optical node No. 0 to optical node No. 2, issue an instruction to switch connection to route SR4, connect routes SR3, SR4, and SR5, and connect intra-node connection information.
  • the connection information of the two ports of the optical node No. 2 to which the route SR4 is connected to the management function unit 21 is updated.
  • the inter-node connection confirmation method of the seventh embodiment can be a means for confirming route connectivity without going through optical node 0. Also, since the port numbers for inputting and outputting the test light are fixed, the optical coupler 93 and the fiber selector 94 required in the third to sixth embodiments are unnecessary.
  • FIG. 14 shows a flow for determining whether the communication confirmation can be performed normally or whether the process cannot be performed normally and ends abnormally.
  • the procedures described in the third embodiment are sequentially performed (S11 and S12), and when communication is confirmed in all the communication confirmation procedures (S12), connection status confirmation is terminated (S14). If confirmation cannot be performed normally in the communication confirmation procedure in step S12 (S12), it is determined that there is an abnormality at that location (S15).
  • FIG. 15 shows a flow for determining whether communication confirmation can be performed normally or whether abnormal termination occurs because communication cannot be performed normally.
  • the procedures described in the fourth to seventh embodiments are sequentially performed (S21 and S22), and if communication is confirmed in all the communication confirmation procedures (S22), the connection status confirmation ends (normal end) (S24). .
  • step S22 if confirmation cannot be performed normally in the communication confirmation procedure, the process proceeds to the confirmation method of the third embodiment (S23).
  • the procedure described in the third embodiment is sequentially performed (S23), and the flow determines that there is an abnormality at a location where normal confirmation cannot be performed in the communication confirmation procedure (S25).
  • the optical node of the present disclosure can also be realized by a computer and a program, and the program can be recorded on a recording medium or provided through a network.
  • This disclosure can be applied to the information and communications industry.
  • optical port monitoring function unit 12 optical cross-connect switch 13: microprocessor 21: intra-node connection information management function unit 22: adjacent node connection information management function unit 23: inter-node connection information management function unit 91: optical node 92 : Optical fibers 83, 93: Optical couplers 84, 94: Fiber selector 85: Optical power meter 95: Optical test equipment 96: Network

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
PCT/JP2021/026748 2021-07-16 2021-07-16 光ノード間の接続情報を管理するシステム及び方法 WO2023286267A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023534566A JPWO2023286267A1 (de) 2021-07-16 2021-07-16
PCT/JP2021/026748 WO2023286267A1 (ja) 2021-07-16 2021-07-16 光ノード間の接続情報を管理するシステム及び方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/026748 WO2023286267A1 (ja) 2021-07-16 2021-07-16 光ノード間の接続情報を管理するシステム及び方法

Publications (1)

Publication Number Publication Date
WO2023286267A1 true WO2023286267A1 (ja) 2023-01-19

Family

ID=84918826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/026748 WO2023286267A1 (ja) 2021-07-16 2021-07-16 光ノード間の接続情報を管理するシステム及び方法

Country Status (2)

Country Link
JP (1) JPWO2023286267A1 (de)
WO (1) WO2023286267A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003318840A (ja) * 2002-03-27 2003-11-07 Fujitsu Ltd フレキシブルリング光ネットワーク及び方法
JP2005292447A (ja) * 2004-03-31 2005-10-20 Central Res Inst Of Electric Power Ind アクティブ光クロージャおよびアクティブ光配線盤および光通信システム
JP2019009714A (ja) * 2017-06-28 2019-01-17 日本電信電話株式会社 ネットワーク監視システムおよびネットワーク監視方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003318840A (ja) * 2002-03-27 2003-11-07 Fujitsu Ltd フレキシブルリング光ネットワーク及び方法
JP2005292447A (ja) * 2004-03-31 2005-10-20 Central Res Inst Of Electric Power Ind アクティブ光クロージャおよびアクティブ光配線盤および光通信システム
JP2019009714A (ja) * 2017-06-28 2019-01-17 日本電信電話株式会社 ネットワーク監視システムおよびネットワーク監視方法

Also Published As

Publication number Publication date
JPWO2023286267A1 (de) 2023-01-19

Similar Documents

Publication Publication Date Title
US9210487B1 (en) Implementation of a large-scale multi-stage non-blocking optical circuit switch
WO2001001725A1 (en) Fiber optic circuit and module with switch
WO1999037043A1 (en) System and method for increasing the robustness of an optical ring network
CN111699637B (zh) 用于光纤线路故障确定的方法和装置
WO2023286267A1 (ja) 光ノード間の接続情報を管理するシステム及び方法
CN101771469B (zh) 用户住宅侧光线路终端装置
JP4656639B2 (ja) 配電網の監視制御用通信ネットワーク
WO2023286266A1 (ja) 光線路を切り替える光ノード及び方法
CN211321557U (zh) 智能路灯系统
JP2005292447A (ja) アクティブ光クロージャおよびアクティブ光配線盤および光通信システム
JPH09196810A (ja) 光ファイバ線路監視装置
JPH05110670A (ja) 光線路切替接続装置
WO2023214467A1 (ja) 光給電システム及び異常箇所検出方法
JP4669795B2 (ja) 光ファイバーケーブル敷設方法
WO2023214466A1 (ja) 遠隔制御装置、遠隔操作システム、異常検出方法、遠隔制御装置としてコンピュータを実現させるためのプログラム
CN113078952B (zh) 用于智能矿山的网络系统与组网方法
WO2023248383A1 (ja) 遠隔光路切替ノード及びその監視方法
WO2023281744A1 (ja) 光ノード、回転角度ずれ補償システム及び回転角度ずれ補償方法
KR100283377B1 (ko) 감시채널의 오버헤드 저장 장치
WO2023166593A1 (ja) 光路切替ノード、光ファイバネットワーク及び光ファイバネットワークの試験方法
JPH0365838A (ja) リング型光ネットワーク
JP7476986B2 (ja) 光クロスコネクト装置
KR20130093780A (ko) 광선로 감시신호 연장을 위한 바이패스 모듈
JP2008252579A (ja) 波長選択スイッチを用いて構成されたノードおよびノード間リンク接続性確認方法
KR102365245B1 (ko) 광접속함체

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21950204

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023534566

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE