System and method for emergency recovery for optical network

Abstract

The present invention provides an emergency recovery system for an optical network and a method thereof. A system according to one embodiment of the present invention may include a first optical module connected to a digital signaling unit (DU) to generate an optical signal, a second optical module that transmits an optical signal to a wireless transceiver unit (RU), an optical cable connecting the first optical module and the second optical module, and a reading device connected to a first end of the disconnected optical cable when the optical cable is disconnected, and which identifies the identification number of an optical module connected to a second end of the disconnected optical cable.

Description

Technology Field

[0001] The present invention relates to an emergency recovery system for an optical network and a method thereof, and more specifically, to an emergency recovery system for an optical network and a method thereof comprising a reading device capable of reading a signal of a damaged optical fiber bundle. Background Technology

[0002] A number of digital signaling units (DU, or central office (COT)) and wireless transceivers (RU, or remote node (RN)) are connected by forming a single optical fiber line using an optical multiplexer. For example, referring to FIGS. 1 and 2, each optical fiber line is laid in a bundle form within an enclosure. In this case, the bundled optical fiber may be severed or damaged in disaster situations such as construction, fire, sinkhole, or flood, as shown in FIG. 2.

[0003] In particular, when optical fiber bundles are severed at both ends of the digital signaling unit and the wireless transceiver unit, a problem arises in that the optical line cannot be restored quickly because there is no way to distinguish the fibers in the bundle at the site, even though reconnection of the severed bundles is necessary.

[0004] Specifically, to emergency restore a severed line to enable mutual communication, the broken line must be reconnected using the same existing line; however, a problem arises in that it is impossible to identify the identical line on-site, making it impossible to determine which optical fibers should be connected to which circuits. Consequently, difficulties arise in locating interconnected lines by sequentially connecting them one by one using a red light source, and this sequential connection and verification procedure results in delays in emergency restoration time.

[0005] Communication networks are public and essential goods, and delays in disaster recovery like this cause unpredictable secondary damage. The problem to be solved

[0006] According to an embodiment of the present invention for solving the above-mentioned problems, the purpose is to provide a device and method that can quickly identify the connection target of an optical fiber bundle by connecting a cut optical fiber to a reading device, without having to individually connect and verify a plurality of optical fiber bundles.

[0007] Specifically, according to one embodiment of the present invention, an optical path reading device for emergency restoration of an optical network can be provided, which connects a severed optical fiber and reads the identification number of the optical fiber.

[0008] In addition, according to another embodiment of the present invention, an optical module may be provided that identifies the disconnection state of an optical fiber and changes a transmission signal into information including an identification number.

[0009] Specifically, the purpose is to minimize damage caused by communication interruption by shortening emergency recovery time through verification of optical module information connected to digital signaling devices and wireless transceivers.

[0010] In addition, according to another embodiment of the present invention, a system capable of identifying line information based on an identification number can be provided by communicating with a line database (DB) that provides location and / or line information of the optical fiber based on an identification number of the disconnected optical fiber identified by an optical fiber reading device.

[0011] The purpose of the present invention is not limited to the purpose according to the above embodiments. means of solving the problem

[0012] An emergency recovery system for an optical network according to an embodiment of the present invention for achieving the above objective may include a first optical module connected to a digital signaling device (DU) to generate an optical signal, a second optical module that transmits an optical signal to a wireless transceiver (RU), an optical cable connecting the first optical module and the second optical module, and a reading device connected to a first end of the disconnected optical cable and identifying the identification number of an optical module connected to a second end of the disconnected optical cable when the optical cable is disconnected.

[0013] In one embodiment, any one of the first optical module and the second optical module can determine the occurrence of a failure state by identifying that an optical signal is not received from any of the remaining optical modules other than the one optical module for a preset time or longer.

[0014] In one embodiment, upon determining the occurrence of the fault state, any one of the optical modules may transmit the identification number of any one of the optical modules instead of the optical signal prior to the occurrence of the fault state.

[0015] In one embodiment, the emergency recovery system of the optical network further includes a line database that records line information of the first optical module and the second optical module, and when the identification number is received from any one of the optical modules, the reading device requests line information matching the identification number from the line database, and upon receiving the matching line information from the line database, the connection target of the first optical cable can be determined.

[0016] In one embodiment, the reading device includes a memory analysis device that extracts the recorded identification number and the recorded line information from a memory in which the identification number and line information of each of the first optical module and the second optical module are recorded, and the reading device can extract the first line information among the recorded line information based on the first identification number among the recorded identification numbers that matches the received identification number as the identification number is received from any one of the optical modules.

[0017] In one embodiment, the reading device can extract second line information among the recorded line information based on a second identification number among the recorded identification numbers that matches the identification number of the remaining optical module, as the identification number is received from the remaining optical module.

[0018] In one embodiment, the reading device can determine the optical cable to be connected to the first end of the disconnected optical cable based on the first identification number and the first line information and the second identification number and the second line information.

[0019] In one embodiment, upon determining the occurrence of the fault state, any one of the optical modules generates an emergency recovery signal instead of the optical signal prior to the occurrence of the fault state, and transmits the generated emergency recovery signal based on a preset protocol, transmission speed, and port information, wherein the emergency recovery signal may include an identification number of the optical module.

[0020] An optical line reading device according to another embodiment of the present invention for achieving the above objective may include, when a plurality of optical cables are disconnected, an input unit comprising a first port to which a first end of a disconnected first optical cable is connected and a second port to which a first end of a disconnected second optical cable is connected, a memory analysis unit that extracts the recorded identification number and the recorded line information from a memory in which the identification number and line information of a plurality of optical modules connected to each of the plurality of optical cables are recorded, and a control unit that separates signals of various wavelengths transmitted from the first optical cable and the second optical cable, receives the first identification number of a first optical module connected to the second end of the first optical cable from the separated signals, extracts an identification number matching the received first identification number from the recorded identification numbers, and extracts the first line information corresponding to the extracted identification number from the recorded line information.

[0021] In one embodiment, the control unit receives a second identification number of a second optical module connected to a second end of the second optical cable from the separated signal, extracts an identification number matching the received second identification number from among the recorded identification numbers, and extracts second line information corresponding to the extracted identification number from among the recorded line information.

[0022] In one embodiment, the control unit can determine whether the first optical cable and the second optical cable are connected based on the first identification number, the first line information and the second identification number and the second line information.

[0023] According to another embodiment of the present invention for achieving the above objective, an emergency recovery method for an optical network performed by an emergency recovery system for an optical network comprises: a step of identifying the occurrence of a Loss of Signal (LOS) in any one of a first optical module connected to a digital signaling unit (DU) to generate an optical signal and a second optical module that transmits an optical signal to a wireless transceiver unit (RU); a step of determining that the occurrence of the identified LOS by any one optical module persists for a preset time or longer; a step of generating an emergency recovery signal and transmitting the generated emergency recovery signal through an optical cable connected to a first end of any one optical module, wherein an optical line reading device is connected to a second end of the optical cable connected to any one optical module, and a step of the optical line reading device extracting an identification number of any one optical module from the generated emergency recovery signal; a step of recognizing an identification number that matches the extracted identification number from a previously recorded identification number and line information of an optical module within the optical network; and It may include a step of determining connection information of any one of the optical modules based on matching identification numbers and corresponding line information. Effects of the invention

[0024] An emergency recovery system for an optical network and a method according to one embodiment of the present invention have the advantage of significantly shortening the time required for optical network recovery.

[0025] An emergency repair system for an optical network and a method according to another embodiment of the present invention have the advantage of being able to collectively identify the identification numbers of each optical fiber by connecting and scanning a plurality of severed optical fibers using an optical path reading device for emergency repair of an optical network.

[0026] In addition, according to another embodiment of the present invention, by matching a reading device to an existing line database, there is an advantage that a separate recovery device is unnecessary in addition to the reading device.

[0027] However, the effects according to the embodiments of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0028] FIGS. 1 and 2 are examples for explaining an optical network system and a disconnected state of the optical network according to a prior embodiment of the art to which the present invention belongs. FIG. 3 is an example of an emergency recovery system for an optical network according to one embodiment of the present invention. FIG. 4 is an example of an emergency recovery system for an optical network including a fiber optic reader equipped with a plurality of ports, according to another embodiment of the present invention. FIG. 5 is a block diagram of a reading device for emergency recovery of an optical network according to one embodiment of the present invention. FIG. 6 is a block diagram of a reading device equipped with a plurality of port cars according to another embodiment of the present invention. FIG. 7 is a flowchart of an emergency recovery method for an optical network according to another embodiment of the present invention. FIG. 8 is a flowchart of an emergency recovery method for an emergency recovery system for an optical network according to another embodiment of the present invention. FIG. 9 is an example of a screen of a display referenced in some embodiments of the present invention. Specific details for implementing the invention

[0029] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0030] In this specification, terms such as "module," "unit," and "part" refer to units of software and / or hardware.

[0031] The above software module / unit / part may, for example, mean a package of program code containing instructions for a hardware component to perform a specific function.

[0032] The above hardware module / unit / part may, for example, be a hardware resource existing as a processor-specific unit for performing operations of a specific function. As an example, the control unit may be hardware that performs the function of reading whether the signal of the optical cable according to an embodiment of the present invention corresponds to the circuit information of a specific optical module.

[0033] The above module / unit / part does not exist solely as a software module / unit / part or a hardware module / unit / part, but may also refer to a unit in which specific software and hardware are combined.

[0034] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0035] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0036] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0037] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0038] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding of the present invention, the same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted.

[0039] FIGS. 1 and 2 are examples for explaining an optical network system and a disconnected state of the optical network according to a prior embodiment of the art to which the present invention belongs.

[0040] As described above, the digital signaling unit (DU, or central office (COT)) and the wireless transceiver unit (RU, or remote node (RN)) are each connected by a single optical fiber, and multiple optical fibers are laid in a bundle form within the enclosure. In this case, as shown in FIG. 2, the bundle of optical fibers may be severed or damaged in disaster situations such as construction, fire, sinkhole, or flood.

[0041] FIG. 3 is an example of an emergency recovery system for an optical network according to an embodiment of the present invention.

[0042] Referring to FIG. 3, the emergency recovery system of the optical network may include a first optical module (31) that generates an optical signal connected to a digital signaling device (DU) and a second optical module (32) that transmits an optical signal to a wireless transceiver (RU), an optical cable connecting the first optical module and the second optical module, and a reading device (100) that identifies the identification number of an optical module connected to the first end of the disconnected optical cable and the second end of the disconnected optical cable when the optical cable is disconnected.

[0043] In one embodiment, the emergency recovery system of the optical network may further include a line database (200) that records line information of the first optical module and the second optical module. According to one embodiment, the line database (200) may be a computing device capable of wired or wireless communication with the emergency recovery system of the optical network and / or the reading device (100) according to an embodiment of the present invention, for example, a server device.

[0044] One of the first optical module (31) and the second optical module (32) of FIG. 3 can determine the occurrence of a failure state by identifying that an optical signal is not received from the remaining optical modules other than the one optical module for a preset time or longer.

[0045] In one embodiment, upon determining the occurrence of the fault state, any one of the optical modules may transmit the identification number of any one of the optical modules instead of the optical signal prior to the occurrence of the fault state.

[0046] FIG. 4 is an example of an emergency recovery system for an optical network including a reading device having a plurality of ports, according to another embodiment of the present invention. With respect to FIG. 4, parts that overlap with the emergency recovery system for an optical network of FIG. 3 are excluded from the description.

[0047] Referring to FIG. 4, unlike the reading device (100) of FIG. 3, the emergency recovery device (100) is equipped with two ports so that the short-circuited optical fiber on the side of the first optical module (31) and the short-circuited optical fiber on the side of the second optical module (32) can each be connected to the emergency recovery device (100) and the circuit of each short-circuited optical fiber can be read.

[0048] The first optical module (31) can detect a failure and, after being connected to the emergency recovery device (100), can identify product information and detect a failure recovery based on the identified product information (310).

[0049] The second optical module (32) can also detect a failure and, after being connected to the emergency recovery device (100), can identify product information and detect a failure recovery based on the identified product information (320).

[0050] In one embodiment, the optical module is an optical transceiver, and S / W according to an embodiment of the present invention for operation in an emergency situation is applied so that an emergency recovery system function can be implemented.

[0051] For example, the emergency recovery signal may be configured such that the Protocol is UART, the Speed ​​is 9600 baud rate (TBD), the Transmit Data is Serial Number, and the Transmit Port is Optical Transceiver TX.

[0052] FIG. 5 is a block diagram of a reading device for emergency recovery of an optical network according to an embodiment of the present invention. In addition to being referred to as an optical fiber reading device or an optical line reading device, the reading device according to an embodiment of the present invention may also be referred to as an emergency recovery device, an emergency recovery equipment, or a line number reader.

[0053] Referring to FIG. 5, the reading device may include a communication unit (110) that communicates with the line database (200) of FIG. 3, an input unit (120) to which a disconnected optical cable is connected, an identification number of an optical module connected to the disconnected optical cable, an output unit (130) that displays line information matching the identification number of the optical module, and a control unit (140) that compares the line information matching the identification number of the optical module and determines the connection target of the disconnected optical cable.

[0054] The communication unit (110) may be configured to include at least one wired and / or wireless communication module widely known in the field to which the present invention belongs, in order to perform wired and wireless communication with the line database (200) according to an embodiment of the present invention.

[0055] In one embodiment, the communication unit (110) may have the line database (200) stored in a portable storage device such as a USB, and in this case, the portable storage device may be inserted and may include an input / output interface for reading information from a reading device (100).

[0056] The input section (120) may be provided with a port into which a terminal of an optical cable is inserted so that a disconnected optical cable is connected. A signal from the optical cable can be received through the port.

[0057] The output unit (130) can visually output various information, such as the identification number of the optical module and line information matching it. According to one embodiment, the output unit may be equipped with a touch sensor to display various information in response to a user's touch input. In this case, the output unit (130) functions as an input unit for receiving user commands.

[0058] The control unit (140) controls the operation and function of each component of the reading device (100). The control unit (140) according to an embodiment of the present invention may be configured to include a CPU (Central Processing Unit), MPU (Micro Processor Unit), MCU (Micro Controller Unit), AP (Application Processor), or any type of processor well known in the art of the present invention. Additionally, the control unit (140) may perform operations on at least one application and / or program for executing the method according to embodiments of the present invention.

[0059] Although not shown, the reading device (100) may include a storage unit for storing various information non-temporarily and a power unit for using the reading device (100) in a portable manner.

[0060] FIG. 6 is a block diagram of a reading device equipped with a plurality of port cars according to another embodiment of the present invention. With respect to FIG. 6, parts that overlap with the reading device (100) of FIG. 5 are excluded from the description.

[0061] Referring to FIG. 6, a reading device (100) according to one embodiment may be a memory analysis device (111) that obtains information such as the identification number of an optical module (SN of an optical transceiver) and line information matching thereto by connecting a storage device that stores a line database in a USB format instead of the communication unit (110) of FIG. 5. In particular, FIG. 6 illustrates an example in which the information of the storage device is data of a network management system, TANGO (T Advanced Next Generation OSS).

[0062] In addition, instead of the input unit (120) of FIG. 5, the reading device (100) according to one embodiment may include a plurality of ports, and in FIG. 6, ports (121) and (122) into which the terminals of a disconnected cable can be inserted are shown as examples.

[0063] The optical fiber switch module (123) can classify the signals collected by connecting disconnected cables to ports (121) and (122), respectively, and the signals collected through ports (121) and (122).

[0064] In addition, the reading device (100) according to an embodiment of the present invention may include the following configuration instead of the control unit (140) of FIG. 5.

[0065] In one embodiment, the reading device (100) may include a wavelength separation unit (142). That is, since signals of multiple wavelengths coexist in a circuit using an optical multiplexing device (MUX), which is an optical module according to an embodiment of the present invention, a wavelength separation function is required to identify each circuit. Accordingly, for example, the reading device (100) may include a wavelength separation Demux.

[0066] In one embodiment, the reading device (100) may include a signal receiving unit (143) that receives a signal transmitted from an optical module (optical transceiver).

[0067] Additionally, the reading device (100) may include a signal analysis and matching unit (141) that analyzes the signal and matches it with information collected from the memory analysis device (111).

[0068] In addition, the reading device (100) according to an embodiment of the present invention may include a touchscreen display (131) that displays the SN and line information by matching the identification number (optical transceiver S / N) of the optical module with the line information based on the emergency recovery signal, instead of the output unit (130) of FIG. 5.

[0069] FIG. 7 is a flowchart of an emergency recovery method for an optical network according to another embodiment of the present invention. FIG. 8 is a flowchart of an emergency recovery method for an emergency recovery system for an optical network according to another embodiment of the present invention. Hereinafter, an emergency recovery method according to an embodiment of the present invention will be described with reference to FIG. 7 and FIG. 8 together.

[0070] Referring to FIG. 7, the emergency recovery system of the optical network can identify a fault state caused by a disconnection of the optical network by identifying the signal response of the optical module (S10).

[0071] Referring to FIG. 8, the optical module identifies the occurrence of LOS (Loss of Signal) (S801), and if it is determined that it persists for longer than a preset time (S802), it generates an emergency recovery signal and can transmit the generated signal (S803).

[0072] For example, the optical module may switch to emergency recovery mode if a failure occurs during service and LOS occurs for a certain period of time (e.g., LOS for 3 minutes). When switched to emergency recovery mode, the optical module can transmit product information of the optical transceiver by turning the Tx disable signal On / Off.

[0073] Again, referring to FIG. 7, when at least one end of the optical fiber is connected to a reading device (S20), the reading device can scan the identification number of the optical module (S30). At this time, the optical module identification number can be transmitted to the reading device (100) from the optical module to which one end of the disconnected optical cable is connected.

[0074] The reading device (100) receives line information matching an identification number from the line database (S40). The line information may include the location of the single-line optical cable, information on the connecting company / region / organization, and the type and / or attribute information of the transmitted and received data.

[0075] A reading device (100) can determine the target for reconnection of the disconnected optical cable based on the identification number and line information (S50). By connecting one end of the optical cable determined for reconnection to one end of the disconnected optical cable, the optical network can be restored.

[0076] Referring to FIG. 8, in the emergency recovery system of the optical network, the disconnected optical line is connected to Port 1 of the reading device (100) (S810). After receiving SN information transmitted from the optical transceiver of the COT or RN, the reading device (100) can identify the line information of the optical line connected to Port 1 by matching the S / N signal information of the optical module retrieved from the TANGO system with the line information (S811).

[0077] Next, for Port2, steps (S810) and (S811) are repeated.

[0078] If the line numbers of Port1 and Port2 are not the same, the line of Port2 is recorded and stored separately, and steps (S810) and (S811) are repeated for other optical lines, and if the line numbers are the same, the optical lines are connected by connecting the lines connected to Port1 and Port2 (S813). Accordingly, the LOS is released and the emergency recovery mode can be released.

[0079] Meanwhile, the optical module operates in the same way as a conventional optical transceiver under normal circumstances (S820).

[0080] FIG. 9 is an example of a screen of a display referenced in some embodiments of the present invention. In FIG. 9, a screen (1310) output through a display (131) is illustrated as an example, and the screen (1310) can display SN information and line information of a line connected to Port 1 and Port 2. Based on the displayed SN information and line information, the connection target of the optical module can be determined. The emergency recovery system and / or reading device (100) can determine the connection information of an optical module connected to the second end of an optical cable connected to the first end of a port based on an identification number and the corresponding line information.

[0081] The methods according to the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., either alone or in combination. The program instructions recorded on the computer-readable medium may be those specifically designed and configured for the present invention, or they may be those known and available to those skilled in the art of computer software.

[0082] Examples of computer-readable media include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Examples of program instructions include machine code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The aforementioned hardware devices may be configured to operate as at least one software module to perform the operation of the present invention, and vice versa.

[0083] Although the invention has been described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims. Explanation of the symbols

[0084] 31: 1st optical module 32: Second optical module 100: Reading device 110: Communications Department 120: Input section 130: Output section 140: Control unit 200: Line Database

Claims

Claim 1 An emergency recovery system for an optical network comprising: a first optical module connected to a digital signaling device (DU) to generate an optical signal; a second optical module that transmits an optical signal to a wireless transceiver (RU); an optical cable connecting the first optical module and the second optical module; and a reading device connected to a first end of the disconnected optical cable and identifying an identification number of an optical module connected to a second end of the disconnected optical cable when the optical cable is disconnected, wherein one of the first optical module and the second optical module determines the occurrence of a failure state by identifying that an optical signal is not received from the remaining optical modules other than the one optical module for a preset time or longer, and upon determining the occurrence of the failure state, the one optical module transmits the identification number of the one optical module instead of the optical signal prior to the occurrence of the failure state. Claim 2 delete Claim 3 delete Claim 4 In claim 1, the emergency recovery system of the optical network further includes a line database that records line information of the first optical module and the second optical module, and the reading device requests line information matching the identification number from the line database upon receiving the identification number from any one of the optical modules, and determines the connection target of the first optical cable upon receiving the matching line information from the line database. Claim 5 An emergency recovery system for an optical network according to claim 1, wherein the reading device includes a memory analysis device that extracts the recorded identification number and the recorded line information from a memory in which the identification number and line information of each of the first optical module and the second optical module are recorded, and the reading device extracts the first line information among the recorded line information based on the first identification number among the recorded identification numbers that matches the received identification number as the identification number is received from any one of the optical modules. Claim 6 An emergency recovery system for an optical network according to claim 5, wherein the reading device extracts second line information among the recorded line information based on a second identification number among the recorded identification numbers that matches the identification number of the remaining optical module as an identification number is received from the remaining optical module. Claim 7 In claim 6, the reading device determines the optical cable to be connected to the first end of the disconnected optical cable based on the first identification number and the first line information and the second identification number and the second line information, an emergency recovery system for an optical network. Claim 8 An emergency recovery system for an optical network according to claim 1, wherein, upon determining the occurrence of the fault state, any one of the optical modules generates an emergency recovery signal instead of the optical signal prior to the occurrence of the fault state, and transmits the generated emergency recovery signal based on a preset protocol, transmission speed, and port information, wherein the emergency recovery signal includes the identification number of the optical module. Claim 9 When multiple optical cables are disconnected, an input unit comprising a first port to which a first end of a disconnected first optical cable is connected and a second port to which a first end of a disconnected second optical cable is connected; and a memory analysis device for extracting the recorded identification number and the recorded line information from a memory in which the identification number and line information of a plurality of optical modules connected to each of the plurality of optical cables are recorded. An optical line reading device comprising a control unit that separates signals of various wavelengths transmitted from the first optical cable and the second optical cable, receives a first identification number of a first optical module connected to the second end of the first optical cable from the separated signals, extracts an identification number matching the received first identification number from the recorded identification numbers, and extracts first line information corresponding to the extracted identification number from the recorded line information, wherein the control unit receives a second identification number of a second optical module connected to the second end of the second optical cable from the separated signals, extracts an identification number matching the received second identification number from the recorded identification numbers, and extracts second line information corresponding to the extracted identification number from the recorded line information. Claim 10 delete Claim 11 In claim 9, the control unit determines whether the first optical cable and the second optical cable are connected based on the first identification number, the first line information and the second identification number, and the second line information, an optical line reading device. Claim 12 A method for emergency recovery of an optical network performed by an emergency recovery system of an optical network, comprising: a step of identifying the occurrence of a Loss of Signal (LOS) in either a first optical module connected to a digital signal unit (DU) to generate an optical signal, or a second optical module that transmits an optical signal to a wireless transceiver unit (RU); a step of determining that the occurrence of the identified LOS by the optical module persists for a preset time or longer; a step of generating an emergency recovery signal and transmitting the generated emergency recovery signal through an optical cable connected to a first end of the optical module, wherein an optical line reader is connected to a second end of the optical cable connected to the optical module, and the optical line reader extracts an identification number of the optical module from the generated emergency recovery signal; and a step of recognizing an identification number that matches the extracted identification number from pre-recorded identification numbers and line information of the optical modules within the optical network. The method for emergency recovery of an optical network includes the step of determining connection information of any one optical module based on line information corresponding to the matching identification number, wherein the identifying step comprises: a step of determining the occurrence of a fault state by determining that an optical signal is not received from any other optical module other than the one optical module for a predetermined time or longer in any one optical module among the first optical module and the second optical module; and a step of transmitting the identification number of the one optical module instead of the optical signal prior to the occurrence of the fault state, in accordance with the determination of the occurrence of the fault state.

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