Optical fiber detection method, ROADM system, server and storage medium

Abstract

The present application relates to the field of optical fiber technology, and in particular to an optical fiber detection method, a reconfigurable optical add / drop multiplexing (ROADM) system, a server, and a storage medium. The optical fiber detection method of the present application is applied to a network management server of a ROADM system, and includes: sequentially turning on an optical fiber according to a predetermined sequence; controlling a downstream optical amplifier corresponding to the optical fiber to provide an optical signal; obtaining a first optical power output by the downstream optical amplifier corresponding to the optical fiber and a second optical power input by the upstream optical amplifier corresponding to the optical fiber; and obtaining a connection state of the optical fiber according to a first insertion loss value of a downstream wavelength selective switch (WSS) corresponding to the optical fiber, which is pre-stored, a second insertion loss value of an upstream WSS corresponding to the optical fiber, which is pre-stored, the first optical power, and the second optical power. During the entire test, it is only necessary to sequentially turn on the corresponding optical fibers according to a predetermined sequence, which can save a large amount of manpower, material power, and time costs, and the test results are almost free from the interference of human factors, and the reliability is greatly improved.

Description

[Technical Field]

[0001] The present application relates to the field of optical fiber technology, and in particular to optical fiber detection methods, Reconfigurable Optical Add-Drop Multiplexer (ROADM) systems, servers, and storage media.

[0002] This application claims priority to a Chinese patent application filed with the China Patent Office on September 26, 2021, bearing application number 202111131784.8 and entitled "Optical fiber detection method, ROADM system, server and storage medium," the entire contents of which are incorporated herein by reference. [Background technology]

[0003] ROADM is a key technology in wavelength division multiplexing (WDM) optical networks. Software-configured ROADMs can achieve real-time local add / drop and pass-through functions for channel wavelengths, enhancing the flexibility of wavelength scheduling in WDM optical networks. Currently, ROADM functions are primarily implemented by three types of devices: wavelength blockers (WBs), planar lightwave circuits (PLCs), and wavelength selective switches (WSSs). WSS-based ROADMs are increasingly being deployed and applied in operators' current networks.

[0004] To ensure the accuracy of the physical fiber connections of each port of a WSS module within a ROADM node, the current method for testing whether the physical fiber connections are incorrect is to test each port with a physical fiber according to the traffic fiber connection plan after the construction is completed. This requires the tester to test each fiber link within each ROADM node. However, because the physical fiber connections within a multi-dimensional ROADM node are very complex and the number of fibers is large, the tester must spend a lot of time and effort to test each fiber link within each ROADM node. Furthermore, the test results may be subject to human interference, which may affect the accuracy of the test results. Summary of the Invention [Means for solving the problem]

[0005] The embodiments of the present application provide an optical fiber detection method, a ROADM system, a server, and a storage medium, which can improve the accuracy of test results while saving manpower and time costs.

[0006] The embodiment of the present application is a ROADM system. Mu The ROADM system includes a network management server and a plurality of optical fiber connection units connected to the network management server, Each of the optical fiber connection units The fiber connection unit includes a downstream optical amplifier, a downstream wavelength selective switch (WSS), an upstream optical amplifier, and an upstream WSS; The plurality of optical fiber connection units are connected to each other through optical fibers, The method is: In the network management server, a downstream optical amplifier corresponding to a first optical fiber connection unit connected to the optical fiber to be detected provides an optical signal to make the optical fiber to be detected conductive and to block other optical fibers. thing And, before Please note Below The first optical power output by the optical amplifier and a corresponding upstream optical amplifier in a second optical fiber connection unit connected to the optical fiber to be detected; obtaining a second optical power to be input; ,before the first optical power and the second optical power according to the Should be detected and obtaining a connection status of the optical fiber.

[0007] The embodiment of the present application is a ROADM system. Mu The ROADM system includes a network management server and a plurality of optical fiber connection units connected to the network management server. Each optical fiber connection unit of the plurality of optical fiber connection units includes a downstream optical amplifier, a downstream wavelength selective switch (WSS), an upstream optical amplifier, an upstream WSS, and a detector, and the plurality of optical fiber connection units are connected to each other through optical fibers. The method includes, in the network management server, controlling the downstream optical amplifier of each optical fiber connection unit to provide an optical signal, and controlling multiple transmission ports of each optical fiber connection unit to operate simultaneously, where each transmission port is turned on and off according to a respective predetermined conduction / cut-off time, controlling one of the multiple reception ports of each optical fiber connection unit to be turned on and controlling other reception ports of the multiple reception ports of each optical fiber connection unit other than the one reception port to be turned off, detecting an actual conduction / cut-off time of the optical signal in the upstream optical amplifier by the detector of each optical fiber connection unit, and calculating the actual conduction / cut-off time and each of the corresponding transmission ports. Obtaining a connection state of the corresponding optical fiber according to the predetermined conduction / disconnection time.

[0009] An embodiment of the present application includes at least one processor and a memory communicatively coupled to the at least one processor. Network Management Further provided is a server, wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the above-described fiber optic detection method.

[0010] The present application is directed to The present invention further provides a ROADM system including a network management server and a plurality of optical fiber connection units connected to the network management server, each of which includes a downstream optical amplifier, a downstream wavelength selective switch (WSS), an upstream optical amplifier, and an upstream WSS, and the plurality of optical fiber connection units are interconnected through optical fibers.

[0011] In this application, an optical signal is provided by a downstream optical amplifier, and a network management server queries first optical power information at the input terminal of the downstream optical amplifier and second optical power information at the output terminal of the upstream optical amplifier. Using this information, the connection insertion loss value of the corresponding physical optical fiber can be calculated to detect whether an abnormality has occurred in the physical optical fiber. During the entire test, the network management server only needs to sequentially turn on the corresponding optical fibers in a predetermined order. Testers do not need to manually test with test meters at each site, saving a great deal of manpower, material resources, and time costs. Furthermore, the test results are largely free from human interference, greatly improving reliability. [Brief explanation of the drawings]

[0012] One or more embodiments are illustratively described by figures in the drawings corresponding thereto; these illustrative descriptions are not intended to be limiting of the embodiments; elements in the drawings having the same reference numeral designation are represented as similar elements; and unless otherwise stated, the figures in the drawings are not to scale.

[0013] [Figure 1] 1 is a schematic diagram illustrating the configuration of a ROADM system according to one embodiment of the present application.

[0014] [Figure 2] 1 is a schematic diagram illustrating the configuration of one optical fiber connection unit in a ROADM system according to one embodiment of the present application.

[0015] [Figure 3] 1 is a schematic diagram illustrating the configuration of a local add / drop unit according to an embodiment of the present application.

[0016] [Figure 4] 1 is a schematic diagram illustrating the configuration of a ROADM system according to one embodiment of the present application.

[0017] [Figure 5] 1 is a schematic diagram illustrating the configuration of one optical fiber connection unit of a ROADM system according to one embodiment of the present application.

[0018] [Figure 6] 1 is a flow diagram of a fiber optic detection method according to one embodiment of the present application.

[0019] [Figure 7] 1 is a schematic diagram of a local configuration of a ROADM system according to one embodiment of the present application;

[0020] [Figure 8] 2 is a flow diagram of the sub-steps of step 204 of the fiber optic detection method according to one embodiment of the present application.

[0021] [Figure 9] 1 is a flow diagram of a fiber optic detection method according to one embodiment of the present application.

[0022] [Figure 10] FIG. 2 is a schematic diagram illustrating the configuration of a server according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0023] In order to clarify the objectives, technical solutions, and advantages of the embodiments of the present application, the following describes each embodiment in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are provided in each embodiment of the present application to help readers better understand the present application. However, the technical solutions claimed for protection of the present application can be realized without these technical details and various changes and modifications based on the following embodiments. The division of the following embodiments is made for the convenience of explanation and does not limit the specific embodiments of the present application in any way. The embodiments can be combined with and reference each other unless they are inconsistent.

[0024] One embodiment of the present application relates to a ROADM system including a network management server and a plurality of optical fiber connection units connected to the network management server.

[0025] Fig. 1 is a schematic diagram of the configuration of a ROADM system according to this embodiment. The ROADM system shown in Fig. 1 includes a network management server 10 and a plurality of optical fiber connection units 20. The network management server 10 is connected to each of the optical fiber connection units 20, thereby controlling each of the optical fiber connection units 20.

[0026] As shown in FIG. 2, this is a schematic diagram of the configuration of one optical fiber connection unit in the ROADM system according to this embodiment, and includes a downstream optical amplifier 101, a downstream WSS 102, an upstream optical amplifier 103, and an upstream WSS 104.

[0027] Specifically, the output terminal of the downstream optical amplifier 101 is connected to the input terminal of the downstream WSS 102, which includes n transmit ports D1 to Dn. The input terminal of the upstream optical amplifier 103 is connected to the output terminal of the upstream WSS 104, which includes n receive ports A1 to An. One transmit port (i.e., any one of the interfaces D1 to Dn) of the downstream WSS 102 is used to connect to one receive port of the upstream WSS of another optical fiber connection unit. One receive port (i.e., any one of the interfaces A1 to An) of the upstream WSS 104 is used to connect to one transmit port of the downstream WSS of another optical fiber connection unit.

[0028] Specifically, the downstream optical amplifier 101 can provide an optical signal, i.e., a wide-spectrum optical signal, during the start-up stage of construction. At this time, there is no traffic optical signal being transmitted, and the network management server can obtain the first optical power at the output terminal of the downstream optical amplifier 101 and the second optical power at the input terminal of the upstream optical amplifier 103, both of which are connected to the same optical fiber, to obtain the insertion loss value of the optical fiber and test the optical fiber.

[0029] Specifically, the role of the downstream optical amplifier 101 in the ROADM system is to amplify the traffic signal sent from the previous node. At the same time, in this embodiment, the downstream optical amplifier 101 also needs to provide a wide-spectrum optical signal when there is no input traffic optical signal (i.e., when the construction is in its initiation stage), and the network management server can query the optical power of the output terminal of the downstream optical amplifier 101. The role of the upstream optical amplifier 103 in the ROADM system is to amplify the traffic signal sent from the previous node. In addition, in this embodiment, the upstream link where the upstream optical amplifier 103 is located is connected to the downstream link of another optical fiber connection unit, so that a wide-spectrum optical signal may be transmitted to the upstream optical amplifier 103. The network management server needs to query the optical power of the input terminal of the upstream optical amplifier 103.

[0030] Specifically, the downstream WSS 102 can operate to turn on or off each of the traffic transmission ports D1 to Dn in response to a traffic manipulation command from the network management server, and the upstream WSS 104 can operate to turn on or off each of the traffic reception ports A1 to An in response to a traffic manipulation command from the network management server.

[0031] Specifically, the ROADM system according to this embodiment has a plurality of optical fiber connection units, and the n transmit ports and n receive ports of each optical fiber connection unit correspond one-to-one. The n transmit ports of each optical fiber connection unit are respectively connected to one receive port of the n optical fiber connection units, and the n receive ports of each optical fiber connection unit are respectively connected to one transmit port of the n optical fiber connection units. Here, one transmit port of one optical fiber connection unit is connected to one receive port of another optical fiber connection unit, and a receive port corresponding to one transmit port of one optical fiber connection unit is connected to another transmit port corresponding to one receive port of the optical fiber connection unit.

[0032] In one embodiment, one optical fiber connection unit further includes a combiner 106 and a splitter 107. That is, this optical fiber connection unit is a local add / drop unit. FIG. 3 is a schematic diagram of the configuration of a local add / drop unit. As shown in FIG. 3, the output terminal of the combiner 106 is connected to the input terminal of the corresponding downstream optical amplifier 101, the input terminal of the combiner 106 is connected to the local user, the input terminal of the splitter 107 is connected to the output terminal of the corresponding upstream optical amplifier 103, and the output terminal of the splitter 107 is connected to the local user. Specifically, the local traffic signals are multiplexed by the combiner 106, amplified through the downstream optical amplifier 101, and then transmitted by the traffic transmitting ports D1 to Dn of the downstream WSS 102 to the traffic receiving ports A1 to An of the upstream WSS 104 of the next node. Similarly, the traffic signals from each direction are transmitted by the respective traffic transmitting ports D1 to Dn of the downstream WSS 102 in each direction to the respective traffic receiving ports A1 to An of the upstream WSS 104 of the local add / drop unit, and then amplified via the upstream optical amplifier 103, after which they are split by the splitter 107 and transmitted to local users.

[0033] For ease of explanation, the number of optical fiber connection units is set to 5 in this embodiment, but is not limited to this solution.

[0034] Fig. 4 is a schematic diagram of the configuration of a ROADM system according to this embodiment. As shown in Fig. 4, the ROADM system includes four-way optical fiber connection units, i.e., an A-way optical fiber connection unit, a B-way optical fiber connection unit, a C-way optical fiber connection unit, a D-way optical fiber connection unit, and one local add / drop unit, and each local add / drop unit is also one optical fiber connection unit. In Fig. 4, solid lines with arrows indicate physical optical fibers, and the arrows indicate the direction of optical signals. A total of 20 optical fibers are interconnected in Fig. 4. Here, the traffic sending port D1 of the downstream WSS of the optical fiber connection unit in the A direction is connected to the traffic receiving port A1 of the upstream WSS of the line unit in the B direction, the traffic sending port D2 of the downstream WSS of the optical fiber connection unit in the A direction is connected to the traffic receiving port A2 of the upstream WSS of the line unit in the D direction, the traffic sending port D3 of the downstream WSS of the line unit in the A direction is connected to the traffic receiving port A1 of the upstream WSS of the optical fiber connection unit in the C direction, and the traffic sending port Dn of the downstream WSS of the line unit in the A direction is connected to the traffic receiving port A2 of the upstream WSS of the local add / drop unit. Accordingly, the traffic of the upstream WSS of the optical fiber connection unit in the A direction is Incoming ports A1 is the downstream WSS traffic of the line unit in the B direction Outbound port Port A2 is connected to D1 and receives the upstream WSS traffic of the optical fiber connection unit in the A direction. Port A2 receives the downstream WSS traffic of the line unit in the D direction. Outbound port Upstream WSS traffic of the line unit connected to D2 and in direction A Incoming ports A3 is the downstream WSS traffic of the optical fiber connection unit in the C direction Outbound port Upstream WSS traffic of the line unit connected to D1 and in the A direction Incoming ports An is the downstream WSS traffic of the local add / drop unit Sending port D2. Other physical optical fiber connection relationships are not described here. That is, one transmitting port of each optical fiber connection unit is connected to one receiving port of another optical fiber connection unit, and the receiving port corresponding to the transmitting port is connected to the transmitting port corresponding to the receiving port of the other optical fiber connection unit.

[0035] In this embodiment, the tester first determines the traffic transmission paths between each network element within the ROADM node according to the traffic fiber optic connection plan provided by the organization or device vendor, and then connects each network element using physical optical fibers according to the traffic fiber optic connection plan. For example, the traffic fiber optic connection plan provided by the device vendor is shown in Figure 4, and the tester needs to connect each optical fiber connection unit according to Figure 4.

[0036] Specifically, the tester connects each network element using physical optical fibers according to the traffic fiber connection plan diagram, and then employs a software method to process the traffic fiber connection plan diagram. The software method processes the traffic fiber connection plan diagram by first constructing a data model recognizable by the network management server based on the traffic fiber connection plan diagram, then establishing a one-to-one correspondence between the hierarchical relationships between data objects in the data model and the physical optical fiber connection relationships between each network element, and finally generating an execution command recognizable by the network management server based on the hierarchical relationships between the data objects. After receiving the execution command, the network management server executes the corresponding traffic operation. Through these steps, the tester can construct a data model recognizable by the network management server based on the traffic fiber connection plan diagram and send the generated execution command to the network management server. The network management server then executes the corresponding traffic operation, such as turning on or off a specific transmit or receive port in a specific WSS in a specific direction, in response to the execution command, thereby saving manpower and time costs.

[0037] In one embodiment, each optical fiber connection unit of the ROADM system further includes a detector. Figure 5 is a schematic diagram of the configuration of one optical fiber connection unit in the ROADM system according to this embodiment. As shown in Figure 5, the detector is connected to the upstream optical amplifier 103, specifically, to the MON port of the upstream optical amplifier 103. The detector is used to detect the conduction and cut-off times of the optical signal in the upstream optical amplifier 103.

[0038] Specifically, in a downstream optical amplifier 101 and an upstream optical amplifier 103 connected to one optical fiber, the downstream optical amplifier 101 generates an optical signal and transmits it to the corresponding upstream optical amplifier 103 through the optical fiber. The detector 105 of this embodiment can obtain the continuity time of the corresponding fiber link by detecting the actual on / off time of the optical signal in the upstream optical amplifier 103. The network management server can determine whether there is a connection abnormality in the corresponding optical fiber link according to the continuity time, so the optical fiber connection unit of this embodiment provides a structural basis for realizing automatic detection of the optical fiber connection unit.

[0039] One embodiment of the present application relates to an optical fiber detection method applied to the network management server of the ROADM system according to the previous embodiment. The specific flow diagram of the optical fiber detection method according to this embodiment is shown in Figure 6, and includes the following steps:

[0040] Step 201: The optical fibers are sequentially passed through in a predetermined order.

[0041] Specifically, the tester first determines the traffic transmission path between each network element within the ROADM node according to the traffic fiber optic connection plan provided by the organization or device vendor. After connecting each network element using physical fibers according to the traffic fiber optic connection plan, the traffic light has not yet been turned on, which is the start of construction. Each fiber needs to be detected to determine whether there is a connection abnormality in the optical fiber, so each fiber needs to be turned on sequentially, with only one fiber turned on at a time.

[0042] Specifically, while one optical fiber is turned on, the target transmit port corresponding to the optical fiber and the target receive port corresponding to the optical fiber are turned on, and transmit ports other than the target transmit port in the ROADM system and receive ports other than the target receive port in the ROADM system are controlled to be blocked. Since only one optical fiber is turned on at a time, only the transmit port and receive port connected to that optical fiber are turned on, and all other transmit ports and receive ports in the ROADM system are blocked.

[0043] Next, a schematic diagram of a local configuration of a ROADM system is shown with reference to Figure 7. Taking the optical fiber shown in Figure 7 as an example, when the optical fiber is turned on, it is necessary to turn on the transmitting port D2 of the downstream WSS of the optical fiber connection unit in the A direction and the receiving port A3 of the upstream WSS of the optical fiber connection unit in the B direction, to block the traffic transmitting ports D1, D3 to Dn of the downstream WSS of the optical fiber connection unit in the A direction, to block all the traffic receiving ports A1 to An of the upstream WSS of the optical fiber connection unit in the A direction, to block all the traffic receiving ports except the traffic receiving port A3 of the upstream WSS of the optical fiber connection unit in the B direction, and to block all the traffic transmitting ports D1 to Dn of the downstream WSS of the optical fiber connection unit in the B direction.

[0044] Referring back to FIG. 6, step 202: Control the downstream optical amplifier corresponding to the optical fiber to provide the optical signal.

[0045] Step 203: Obtain a first optical power output by a downstream optical amplifier corresponding to the optical fiber and a second optical power input by an upstream optical amplifier corresponding to the optical fiber.

[0046] 7 as an example, when the traffic optical signal is not yet turned on and the construction is in the starting stage, the downstream optical amplifier in direction A provides an optical signal under the control of the network management server. The wide-spectrum optical signal is transmitted to the downstream WSS in direction A, transmitting port D2, receiving port A3, and the upstream WSS in direction B. The network management server obtains the first optical power output by the downstream optical amplifier connected to the optical fiber and the second optical power input by the upstream optical amplifier connected to the optical fiber.

[0047] Referring back to FIG. 6 , step 204: obtain the connection status of the optical fiber according to the first insertion loss value of the downstream WSS corresponding to the pre-stored optical fiber, the second insertion loss value of the upstream WSS corresponding to the pre-stored optical fiber, the first optical power, and the second optical power.

[0048] Specifically, the downstream WSS and the upstream WSS each have an insertion loss. The insertion loss value information for the downstream WSS and the upstream WSS are both defined in the corresponding WSS board. Before performing a test, the network management server acquires and stores the insertion loss value information for the downstream WSS and the upstream WSS. During the test, the network management server acquires the connection status of the optical fibers according to a first insertion loss value for the downstream WSS corresponding to the pre-stored optical fiber, a second insertion loss value for the upstream WSS corresponding to the pre-stored optical fiber, a first optical power, and a second optical power.

[0049] In one embodiment, refer to Figure 8, which shows a flow diagram of the sub-steps of the above step 204. Obtaining the connection state of the optical fiber according to the first insertion loss value, the second insertion loss value, the first optical power, and the second optical power includes the following sub-steps:

[0050] Step 2041: Calculate an insertion loss value of the optical fiber according to the first insertion loss value, the second insertion loss value, the first optical power, and the second optical power.

[0051] Specifically, calculating the insertion loss value of the optical fiber according to the first insertion loss value, the second insertion loss value, the first optical power, and the second optical power may be achieved by subtracting the second optical power from the first optical power to obtain a total insertion loss value, and then subtracting the first insertion loss value and the second insertion loss value from the total insertion loss value to obtain the insertion loss value of the optical fiber. That is, the insertion loss value of the optical fiber = (first optical power - second optical power) - first insertion loss value - second insertion loss value. By such a calculation method, the insertion loss value of the optical fiber can be obtained.

[0052] Step 2042: If the insertion loss value of the optical fiber is greater than the predetermined alarm threshold, issue a caution alarm.

[0053] Specifically, an alarm threshold is preset in the network management server. After obtaining the optical fiber insertion loss value, the network management server compares the optical fiber insertion loss value with the predetermined alarm threshold. If the optical fiber insertion loss value does not exceed the predetermined alarm threshold, it indicates that there is no error in the connection of the optical fiber. If the optical fiber insertion loss value exceeds the set alarm threshold, the network management server generates a warning alarm to alert the tester that there is a problem with the connection of the physical optical fiber in the traffic transmission path. After receiving the warning alarm generated by the network management server, the tester inspects the connection of the physical optical fiber in the traffic transmission path and resumes the insertion loss test on the optical fiber after the inspection.

[0054] In this embodiment, the optical power information of the input terminal of the downstream optical amplifier and the optical power information of the output terminal of the upstream optical amplifier are queried, and the connection insertion loss value of the corresponding physical optical fiber is calculated using this information to detect whether the physical optical fiber has an abnormality. During the entire test, the network management server only needs to turn on the corresponding optical fibers in a predetermined order. Testers do not need to manually test with test meters at each site, saving a great deal of manpower, material resources, and time costs. Moreover, the test results are almost free from human interference, greatly improving reliability.

[0055] This embodiment is applicable to a scenario where the site is small, the directional dimension is small, and the physical optical fiber connections are few, for example, the number of physical optical fibers is less than 100. In this case, the optical fiber detection method according to this embodiment has high detection accuracy, and can accurately detect the insertion loss information of the optical fiber, thereby determining whether the optical fiber is misconnected, broken, excessively bent, etc.

[0056] One embodiment of the present application relates to an optical fiber detection method applied to a network management server of a ROADM system according to the above embodiment, wherein each optical fiber connection unit further includes a detector connected to an upstream optical amplifier, and the detector is used to detect the conduction and cut-off times of an optical signal in the upstream optical amplifier.

[0057] A specific flow diagram of this embodiment is shown in FIG. 9 and includes the following steps.

[0058] Step 301: Control the downstream optical amplifiers of each optical fiber connection unit to provide optical signals.

[0059] Step 302: Control multiple transmitting ports in each optical fiber connection unit to operate simultaneously, and each transmitting port continuously switches between on and off states according to a predetermined on-off time respectively set.

[0060] Specifically, still referring to FIG. 4, in this embodiment, the network management server simultaneously controls the operation of each transmitting port in the optical fiber connection unit in each direction. For example, it controls all transmitting ports D1-Dn of all downstream WSSs in the optical fiber connection unit and local add / drop units to be turned on simultaneously in four directions A, B, C, and D. For each transmitting port, an "on-off-on-off" operation is performed, so that the on and off states of the transmitting port are continuously switched on and off. A predetermined conduction / cutoff time is set for each transmitting port, and the on and off times of each transmitting port correspond to the predetermined conduction / cutoff time.

[0061] Step 303: Control one receiving port of each optical fiber connection unit to be turned on, and control the receiving ports other than the one receiving port of each optical fiber connection unit to be turned off.

[0062] Specifically, for each optical fiber connection unit, one receiving port is turned on and the other receiving ports are turned off. For example, still referring to FIG. 4, the receiving port A1 of the upstream WSS of each optical fiber connection unit is turned on and the other receiving ports A2 through An are turned off. The optical signals from the five receiving ports A1 are respectively input to the corresponding five upstream optical amplifiers, and the actual on / off times of the optical signals can be detected by a detector.

[0063] In one example, after the detector of each optical fiber connection unit detects the actual on / off times of the optical signal in the upstream optical amplifier, the other receiving ports in each optical fiber connection unit are controlled to be turned on in a predetermined order. Specifically, continuing with the example of FIG. 4, the receiving port A1 of the upstream WSS of each optical fiber connection unit is turned on, and the other receiving ports A2 through An are turned off. The optical signals from the five receiving ports A1 enter the five upstream optical amplifiers, respectively, and the detector can detect the actual on / off times of the optical signal in the upstream optical amplifiers. At this time, the detection of the optical fiber link is only partially completed. When performing step 302 to detect each optical fiber link, the other receiving ports of the upstream WSS of each optical fiber connection unit need to be turned on. That is, after the detection is completed, the five receiving ports A1 are turned off, and the five receiving ports A2 are turned on for further detection. This is repeated until the detection of all receiving ports An is completed, allowing for rapid detection of each fiber.

[0064] Step 304: The detector of each optical fiber connection unit detects the actual on / off time of the optical signal in the upstream optical amplifier.

[0065] Step 305: Obtain the connection status of the corresponding optical fiber according to the actual on / off time and the predetermined on / off time set for the corresponding transmitting port.

[0066] Specifically, in the optical fiber connection unit, the role of the detector is to detect the actual on / off time of the optical signal in the corresponding upstream optical amplifier. Meanwhile, a predetermined on / off time is set for each transmitting port, and each transmitting port performs an "on-off-on-off" operation according to the predetermined on / off time. Therefore, if there is no connection abnormality in the optical fiber, there should be no significant difference between the actual on / off time and the predetermined on / off time. Therefore, the actual on / off time and the predetermined on / off time can be used to determine the connection status of the corresponding optical fiber connecting the receiving port and the transmitting port corresponding to that receiving port.

[0067] Continuing with FIG. 4, the network management server compares the optical signal on / off times detected by the upstream detectors of the optical fiber connection units and local add / drop units in the directions A, B, C, and D with the on / off times set in the traffic transmission ports corresponding to the downstream WSSs of the optical fiber connection units and local add / drop units in the directions A, B, C, and D to determine whether the optical fiber connections between the corresponding ports are correct. For example, upstream WSS A1 of the optical fiber connection unit in the direction A is connected to downstream WSS D1 of the optical fiber connection unit in the direction B. The network management server compares the optical signal on / off times detected by the upstream detectors of the optical fiber connection unit in the direction A with the optical signal on / off times set in the transmission port D1 of the downstream WSS of the optical fiber connection unit in the direction B. If the two on / off times match within the tolerance range, the physical optical fiber connection between the transmission port D1 of the downstream WSS of the optical fiber connection unit in the direction B and the reception port A1 of the upstream WSS of the optical fiber connection unit in the direction A is correct; otherwise, the optical fiber connection is incorrect.

[0068] In one example, obtaining the connection status of the corresponding optical fiber according to the actual on / off time and the predetermined on / off time set for the corresponding transmitting port includes calculating the difference between the actual on / off time and the predetermined on / off time, and issuing a warning alarm if the difference is not within a predetermined range. Specifically, if the difference is within the predetermined range, it indicates that there is no error in the connection of the optical fiber. If the difference is beyond the predetermined range, the network management server issues a warning alarm to alert the tester that there is a problem with the connection of the physical optical fiber in the traffic transmission path. After receiving the warning alarm issued by the network management server, the tester checks the connection of the physical optical fiber in the traffic transmission path and resumes testing the optical fiber after the check.

[0069] Continuing with Figure 4 as an example, the network management server determines the on / off times of the downstream WSS transmission ports D1-Dn of the optical fiber connection units and local add / drop units in directions A, B, C, and D according to the traffic optical fiber connection plan shown in Figure 4. By setting the on / off times of each transmission port to be unique, the accuracy of detection is improved, and by setting two on / off times to be the same, it is possible to avoid a situation where a misconnection cannot be detected. For example, the on / off time of the downstream WSS traffic transmission port D1 of the optical fiber connection unit in direction A is set to 10 ms, the on / off time of the downstream WSS traffic transmission port D2 of the optical fiber connection unit in direction A is set to 20 ms, and the on / off time of the downstream WSS traffic transmission port D3 of the optical fiber connection unit in direction A is set to 30 ms. Similarly, the on / off times of all transmission ports of the downstream WSSs in all directions are set.

[0070] In this embodiment, the actual on / off times of the corresponding optical fibers are obtained by simultaneously turning on the transmit ports of the optical fiber connection units, controlling one receive port of each optical fiber connection unit to turn on in a predetermined sequence, and controlling the receive ports other than the one receive port of each optical fiber connection unit to turn off. By comparing the actual on / off times with the corresponding predetermined on / off times, it is possible to quickly detect whether an abnormality has occurred in the physical optical fiber. During the entire test, the network management server must perform an "on-off-on-off" operation for all transmit ports in each direction according to the predetermined on / off times. The network management server also needs to turn on the receive ports in each direction in the order A1 to An. Testers do not need to manually test each site using a test meter, saving a great deal of manpower, material resources, and time. Moreover, the test results are less subject to human interference, greatly improving reliability.

[0071] This embodiment is applicable to a scenario in which the site is large, has many directional dimensions, and has numerous and complicated physical optical fiber connections, for example, the number of physical optical fibers is 300 or more. In this scenario, it is necessary to determine whether there are any misconnected optical fibers among the numerous optical fibers within a short period of time. In this case, the optical fiber detection method of this embodiment can achieve high detection efficiency and a short time.

[0072] The division of steps in the various methods described above is merely for clarity of explanation, and when implemented, they may be integrated into one step, or some steps may be divided into multiple steps, and as long as they contain the same logical relationship, they are all within the scope of protection of this patent; making insignificant modifications to the algorithm or flow, or introducing insignificant designs, but not changing the core design's algorithm and flow, are all within the scope of protection of this patent.

[0073] One embodiment of the present invention relates to a server including at least one processor 401 and a memory 402 communicatively coupled to the at least one processor 401, as shown in Figure 10, wherein the memory 402 stores instructions executable by the at least one processor 401, the instructions being executed by the at least one processor 401 to enable the at least one processor 401 to perform the communication control method described above.

[0074] Here, the memory 402 and the processor 401 are connected via a bus. The bus may include any number of interconnected buses and bridges. The bus connects various circuits of one or more processors 401 and the memory 402. The bus may also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, all of which are known in the art and will not be further described herein. A bus interface provides an interface between the bus and a transceiver. The transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed via the processor 401 is transmitted over a wireless medium through an antenna, which receives and transmits data to the processor 401.

[0075] The processor 401 is responsible for managing the bus and normal processing and may provide a variety of functions including timing, peripheral interfacing, voltage regulation, power management, and other control functions, while the memory 402 may be used to store data used by the processor 401 in performing operations.

[0076] One embodiment of the invention relates to a computer-readable storage medium having stored thereon a computer program, the method embodiments described above being implemented when the computer program is executed by a processor.

[0077] That is, it will be understood by those skilled in the art that all or part of the steps in the methods of the above-described embodiments can be achieved by instructing related hardware by a program, and the program is stored in a storage medium and includes several instructions that cause a device (which may be a single-chip computer, chip, etc.) or a processor to execute all or part of the steps of the methods of the embodiments of the present application. Meanwhile, the storage medium includes various media capable of storing program code, such as a USB memory, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0078] Those skilled in the art will understand that the above embodiments are specific examples for realizing the present invention, and that in actual applications, various changes in form and details may be made thereto without departing from the spirit and scope of the present application.

Claims

1. 1. An optical fiber detection method applied to a reconfigurable optical add / drop multiplexing (ROADM) system, comprising: The ROADM system includes a network management server and a plurality of optical fiber connection units connected to the network management server; Each optical fiber connection unit of the plurality of optical fiber connection units includes a downstream optical amplifier, a downstream wavelength selective switch (WSS), an upstream optical amplifier, and an upstream WSS, and the plurality of optical fiber connection units are connected to each other through optical fibers; The method includes, in the network management server: A downstream optical amplifier in a first optical fiber connection unit connected to the optical fiber to be detected provides an optical signal to control the optical fiber to be detected to be conductive and the other optical fibers to be blocked; acquiring a first optical power output from the corresponding downstream optical amplifier and a second optical power input to a corresponding upstream optical amplifier in a second optical fiber connection unit connected to the optical fiber to be detected; obtaining a connection state of the optical fiber to be detected according to the first optical power and the second optical power; A fiber optic detection method comprising:

2. Obtaining the connection state of the optical fiber to be detected according to the first optical power and the second optical power includes: obtaining a connection state of the optical fiber to be detected according to a first insertion loss value of a downstream WSS in the first optical fiber connection unit that is stored in advance, a second insertion loss value of an upstream WSS in the second optical fiber connection unit that is stored in advance, the first optical power, and the second optical power; 10. The fiber optic detection method of claim 1, comprising:

3. Obtaining the connection state of the optical fiber to be detected according to the first insertion loss value, the second insertion loss value, the first optical power, and the second optical power includes: calculating an insertion loss value of the optical fiber to be detected according to the first insertion loss value, the second insertion loss value, the first optical power, and the second optical power; issuing a warning alarm when the insertion loss value of the optical fiber to be detected is greater than a predetermined alarm threshold; The fiber optic detection method of claim 2 , comprising:

4. Calculating the insertion loss value of the optical fiber to be detected according to the first insertion loss value, the second insertion loss value, the first optical power, and the second optical power includes: subtracting the second optical power from the first optical power to obtain a total insertion loss value; subtracting the first insertion loss value and the second insertion loss value from the total insertion loss value to obtain the insertion loss value of the optical fiber to be detected; The fiber optic detection method of claim 3 , comprising:

5. controlling a target transmitting port corresponding to the optical fiber to be detected and a target receiving port corresponding to the optical fiber to be turned on; The fiber optic detection method of claim 1 further comprising:

6. blocking transmission ports other than the target transmission port in the ROADM system, and blocking reception ports other than the target reception port in the ROADM system; The fiber optic detection method of claim 5 further comprising:

7. Detecting each optical fiber of the ROADM system by sequentially conducting one optical fiber in accordance with a predetermined order; The fiber optic detection method of claim 1 further comprising:

8. The optical fiber detection method according to claim 1 , wherein each of the optical fiber connection units is connected to other optical fiber connection units by a transmitting port of its downstream WSS and a receiving port of its upstream WSS.

9. an output terminal of a downstream optical amplifier in each of the optical fiber connection units is connected to an input port of a downstream WSS including n transmitting ports, and an input terminal of an upstream optical amplifier in each of the optical fiber connection units is connected to an output port of the upstream WSS including n receiving ports; the n transmitting ports of each of the optical fiber connection units are connected, via optical fibers, to corresponding output ports of other optical fiber connection units among the plurality of optical fiber connection units in one-to-one correspondence; the n receiving ports of each of the optical fiber connection units are connected, via optical fibers, to corresponding transmitting ports of other optical fiber connection units among the plurality of optical fiber connection units in one-to-one correspondence; one transmitting port among the n transmitting ports of each of the optical fiber connection units is connected to one corresponding receiving port among the n receiving ports of another optical fiber connection unit, and a receiving port among the n receiving ports of each of the optical fiber connection units, which corresponds to the one transmitting port among the n transmitting ports of each of the optical fiber connection units, is connected to a transmitting port among the n transmitting ports of the other optical fiber connection unit, which corresponds to the one corresponding receiving port among the n receiving ports of the other optical fiber connection unit; 10. The fiber optic detection method of claim 1.

10. 1. An optical fiber detection method applied to a reconfigurable optical add / drop multiplexing (ROADM) system, comprising: The ROADM system includes a network management server and a plurality of optical fiber connection units connected to the network management server; Each optical fiber connection unit of the plurality of optical fiber connection units includes a downstream optical amplifier, a downstream wavelength selective switch (WSS), an upstream optical amplifier, an upstream WSS, and a detector, and the plurality of optical fiber connection units are connected to each other through optical fibers; The method includes, in the network management server: controlling the downstream optical amplifier of each of the optical fiber connection units to provide an optical signal; Controlling the multiple transmitting ports of each optical fiber connection unit to operate simultaneously, each transmitting port being turned on and off according to its own predetermined turn-on and turn-off time; Controlling one of the plurality of receiving ports of each of the optical fiber connection units to be turned on, and controlling the other receiving ports of the plurality of receiving ports of each of the optical fiber connection units other than the one receiving port to be turned off; detecting actual conduction and cut-off times of the optical signal in the upstream optical amplifier by the detector of each of the optical fiber connection units; obtaining a connection status of the corresponding optical fiber according to the actual conduction / disconnection time and the predetermined conduction / disconnection time of each of the corresponding transmission ports; A fiber optic detection method comprising:

11. Obtaining a connection status of the optical fiber according to the actual conduction / disconnection time and the predetermined conduction / disconnection time of each corresponding transmission port, calculating a difference between the actual conduction / interruption time and the predetermined conduction / interruption time; issuing a warning alarm if the difference is not within a predetermined range; The fiber optic detection method of claim 10, comprising:

12. When the detector of each optical fiber connection unit detects the actual on / off time of the optical signal in the upstream optical amplifier, control other receiving ports of each optical fiber connection unit to turn on according to a predetermined sequence; The fiber optic detection method of claim 10.

13. an output terminal of a downstream optical amplifier in each of the optical fiber connection units is connected to an input port of a downstream WSS including n transmitting ports, an input terminal of an upstream optical amplifier in each of the optical fiber connection units is connected to an output port of the upstream WSS including n receiving ports, and the detector is connected to the upstream optical amplifier; the n transmitting ports of each of the optical fiber connection units are connected, via optical fibers, to corresponding output ports of other optical fiber connection units among the plurality of optical fiber connection units in one-to-one correspondence; the n receiving ports of each of the optical fiber connection units are connected, via optical fibers, to corresponding transmitting ports of other optical fiber connection units among the plurality of optical fiber connection units in one-to-one correspondence; one transmitting port among the n transmitting ports of each of the optical fiber connection units is connected to one corresponding receiving port among the n receiving ports of another optical fiber connection unit, and a receiving port among the n receiving ports of each of the optical fiber connection units, which corresponds to the one transmitting port among the n transmitting ports of each of the optical fiber connection units, is connected to a transmitting port among the n transmitting ports of the other optical fiber connection unit, which corresponds to the one corresponding receiving port among the n receiving ports of the other optical fiber connection unit; The fiber optic detection method of claim 10.

14. at least one processor; a memory communicatively coupled to the at least one processor; A network management server applied to a reconfigurable optical add / drop multiplexing (ROADM) system, comprising: the memory storing instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the fiber optic detection method of any one of claims 1 to 13; Network management server.

15. a network management server according to claim 14; a plurality of optical fiber connection units connected to the network management server; 1. A reconfigurable optical add / drop multiplexing (ROADM) system comprising: Each optical fiber connection unit of the plurality of optical fiber connection units includes a downstream optical amplifier, a downstream wavelength selective switch (WSS), an upstream optical amplifier, and an upstream WSS, and the plurality of optical fiber connection units are connected to each other through optical fibers. Reconfigurable Optical Add / Drop Multiplexing (ROADM) system.

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