Filler wave protection method and apparatus, board, system, medium, and product

Abstract

The present disclosure provides a filler wave protection method, comprising: determining that at least one filler wave among a plurality of filler waves is abnormal; acquiring preset attenuation value adjustment information, wherein the preset attenuation value adjustment information is attenuation value adjustment information corresponding to the case where at least one filler wave is abnormal; and updating a first attenuation value of a wavelength scheduling device on the basis of the preset attenuation value adjustment information to adjust a filler wave waveform, so that the difference between the adjusted filler wave waveform and an initial waveform is less than a preset threshold, wherein the initial waveform is a filler wave waveform under the condition where the plurality of filler waves are all normal. The present disclosure further provides a filler wave protection apparatus, a filler wave light source board, a system, a computer-readable medium, and a computer program product.

Description

Filling wave protection method, device, single board, system, medium and product

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application CN 202410867169.0, filed on June 28, 2024, entitled “Filling wave protection method, device, single board, system, medium and product”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of optical transmission network communication, and particularly relates to a filling wave protection method, device, single board, system, computer readable medium and computer program product. BACKGROUND

[0004] In the field of optical transmission network communication, with the rapid growth of communication capacity, wavelength division multiplexing technology can simultaneously transmit multiple optical signals of different wavelengths in a single optical fiber, becoming the core technology to improve transmission efficiency. As a further development of wavelength division multiplexing technology, channel expansion technology can expand the available wavelength band on the basis of the traditional wavelength band, further increasing the number of multiplexed channels in the optical fiber, and can significantly improve the transmission capacity of the channel expansion system.

[0005] In the channel expansion system, due to the use of a wider frequency spectrum range, stimulated Raman scattering (SRS) effect becomes a key factor affecting system performance. SRS effect can cause optical power to transfer from short wavelength to long wavelength, and this transfer has a cumulative effect. After experiencing multiple cross-section transmissions, the persistent transfer of optical power can cause the optical power distribution at the receiving end to be seriously uneven, and the optical signal-to-noise ratio (OSNR) to be significantly uneven, thereby causing the system performance requirements to be unable to be met. In addition, the dynamic wavelength, add / drop operation in the channel expansion system requires dynamic control of the wavelength power in the system to ensure the stability and performance of the system, and the control process is extremely complex.

[0006] To mitigate the impact of SRS effects on system performance, the channel extension system employs a fill waveform strategy to ensure stable operation. This strategy keeps the system in full-wave configuration at all times. After system startup and initial adjustment, power balancing and management can be performed following the "real waveform / dummy waveform interchange" principle. This allows the system to quickly recover stability when facing dynamic wavelengths or add / drop operations, and reduces interference from wavelength changes on existing channel services. However, anomalies in the fill waveform can lead to service interruptions and affect system performance. Therefore, implementing an effective fill waveform protection scheme is necessary to ensure the reliability of the channel extension system and minimize service interruptions. Summary of the Invention

[0007] This disclosure provides a filling wave protection method, apparatus, board, system, computer-readable medium, and computer program product.

[0008] This disclosure provides a filling wave protection method, which includes: determining that at least one of the multiple filling waves is abnormal; obtaining preset attenuation value adjustment information, wherein the preset attenuation value adjustment information is the attenuation value adjustment information corresponding to the abnormal condition of at least one filling wave; updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information to adjust the filling wave waveform, such that the difference between the adjusted filling wave waveform and the initial waveform is less than a preset threshold, wherein the initial waveform is the filling wave waveform when all multiple filling waves are normal.

[0009] This disclosure provides a filling wave protection device, which includes: a memory and a processor; the memory stores a computer program, and when the computer program is executed by the processor, it implements the filling wave protection method according to this disclosure.

[0010] This disclosure provides a filling wave light source board, on which a filling wave protection device according to this disclosure is provided.

[0011] This disclosure provides a system including at least one filling wave protection device or at least one filling wave light source board according to an embodiment of this disclosure.

[0012] This disclosure provides a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the filling wave protection method according to embodiments of this disclosure.

[0013] This disclosure provides a computer program product, which includes a computer program that, when executed by a processor, implements the filling wave protection method according to this disclosure. Attached Figure Description

[0014] In the accompanying drawings of the embodiments disclosed herein:

[0015] Fig. 1 is a schematic diagram of SRS power transfer provided by an embodiment of the present disclosure;

[0016] Fig. 2 is a schematic diagram of system architecture provided by an embodiment of the present disclosure;

[0017] Fig. 3 is a schematic diagram of a transmission link provided by an embodiment of the present disclosure;

[0018] Fig. 4 is a flowchart of a fill-in wave protection method provided by an embodiment of the present disclosure;

[0019] Fig. 5 is a schematic diagram of an internal light source state detection module of a fill-in wave light source provided by an embodiment of the present disclosure;

[0020] Fig. 6 is a flowchart of another fill-in wave protection method provided by an embodiment of the present disclosure;

[0021] Fig. 7 is a schematic diagram of an example provided by an embodiment of the present disclosure;

[0022] Fig. 8 is a schematic diagram of another example provided by an embodiment of the present disclosure;

[0023] Fig. 9 is a schematic diagram of yet another example provided by an embodiment of the present disclosure;

[0024] Fig. 10 is a schematic diagram of yet another example provided by an embodiment of the present disclosure;

[0025] Fig. 11 is a schematic diagram of a fill-in wave protection device structure provided by an embodiment of the present disclosure;

[0026] Fig. 12 is a schematic diagram of a ROADM networking system structure provided by an embodiment of the present disclosure;

[0027] Fig. 13 is a schematic diagram of a FOADM networking system structure provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to better understand the technical solutions of the present disclosure, a fill-in wave protection method, device, single board, system, computer readable medium and computer program product provided by an embodiment of the present disclosure are described in detail below with reference to the accompanying drawings.

[0029] The embodiments shown will be described in greater detail in the following, but the embodiments shown can be embodied in different forms and the present disclosure should not be interpreted as being limited to the embodiments set forth below. Rather, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0030] The accompanying drawings of the embodiments disclosed herein are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the detailed embodiments to explain this disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the description of the detailed embodiments with reference to the accompanying drawings.

[0031] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.

[0032] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. The term "and / or" as used in this disclosure includes any and all combinations of one or more of the associated enumerated entries. The singular forms "a" and "the" as used in this disclosure are also intended to include the plural forms, unless the context clearly indicates otherwise. The terms "comprising," "made of," etc., as used in this disclosure specify the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0033] Unless otherwise specified, all terms used in this disclosure (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that 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 art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so specified in this disclosure.

[0034] Unless otherwise specified, the following technical terms shall be interpreted as follows in this disclosure.

[0035] 1) Wavelength Division Multiplexing (WDM) is a technology that enables the simultaneous transmission of multiple optical signals of different wavelengths in a single optical fiber.

[0036] 2) Dense Wavelength Division Multiplexing (DWDM) is a WDM technology with very narrow channel wavelength spacing, typically less than or equal to 100 GHz. Devices using this technology can cover one or more spectral bands.

[0037] 3) An Optical Add / Drop Multiplexer (OADM) node is a network element used in WDM optical communication systems. Its main functions include: adding new wavelength signals to a multiplexed optical signal (including signals of multiple different wavelengths) passing through the OADM node, and / or deleting one or more wavelength signals from the multiplexed optical signal. That is, it can realize the Add and / or Drop functions. Other optical signals besides Add and / or Drop can pass directly through (referred to as pass-through) the OADM node.

[0038] 4) A Reconfigurable Optical Add-Drop Multiplexer (ROADM) node is also a network element used in WDM optical communication systems. Its main functions include adding new wavelength signals to a multiplexed optical signal (including signals of multiple different wavelengths) passing through the ROADM node, and / or deleting one or more wavelength signals from the multiplexed optical signal. That is, it can implement add-on and / or drop-off functions. Other optical signals besides add-on and / or drop-off can directly pass through the ROADM node. In addition, the wavelength signals of add-on and / or drop-off can be remotely configured and dynamically adjusted through the network management system to achieve add-on and / or drop-off configuration or pass-through configuration for any wavelength.

[0039] 5) Fixed Optical Add / Drop Multiplexer (FOADM) node is also a network element used in WDM optical communication systems. Its main functions include: adding fixed wavelength signals to a multiplexed optical signal (including signals of multiple different wavelengths) passing through the FOADM node, and / or deleting one or more fixed wavelength signals from the multiplexed optical signal. That is, it can implement add and / or drop functions for fixed wavelength signals. Other optical signals besides add and / or drop can pass directly through the FOADM node.

[0040] 6) An optical amplifier (OA) is a key component in an optical communication system. It is used to amplify optical signals to compensate for signal attenuation during optical fiber transmission.

[0041] 7) An optical booster amplifier (OBA) is an OA in an optical communication system used to enhance the power of optical signals. It is usually used at the end of an optical fiber transmission link to compensate for the loss of optical signals during optical fiber transmission.

[0042] 8) Wavelength scheduling equipment is a device used in optical communication systems to manage and control the wavelength of optical signals. For example, it may include a wavelength selective switch (WSS) and a variable optical attenuator (VOA). WSS and VOA can work together to achieve dynamic scheduling and optimization of wavelengths in the optical network.

[0043] 9) WSS is a core component in ROADM optical networks, which has the function of filtering different wavelengths.

[0044] 10) VOA is an important passive optical device in optical communication systems, which achieves real-time control of signals by attenuating the transmitted optical power.

[0045] 11) A photodiode (PD) is a semiconductor photodetector that can convert light signals into electrical signals.

[0046] 12) The Optical Transform Unit (OTU) is a key component in the wavelength division multiplexing (WDM) system, responsible for the access and processing of optical signals.

[0047] 13) An Optical Performance Monitor (OPM) is an instrument used to monitor and evaluate the performance of optical signals in fiber optic communication networks. An OPM can measure parameters such as the intensity, frequency, phase, and wavelength of optical signals in real time, thereby ensuring that the performance of the optical network reaches the expected level.

[0048] 14) Filling wave is a non-service optical wave used in optical communication systems to fill unused optical spectrum and maintain stable and balanced system power.

[0049] 15) SRS effect: Referring to Figure 1, which shows a schematic diagram of SRS power transfer provided in the embodiments of this disclosure, Figure 1 takes a C+L band system as an example of a channel extension system. Since the C+L band system occupies a wider spectrum, it is more affected by SRS. As shown in Figure 1, the C+L band system is affected by SRS, causing optical power to transfer from short wavelengths to long wavelengths. This transfer has a cumulative effect. After transmission across multiple bands, the continuous transfer of optical power may lead to a series of problems, thereby affecting system performance and stability.

[0050] Referring to Figure 2, which shows a schematic diagram of the system architecture provided in the embodiments of this disclosure, the applicable scenarios of this disclosure will be described in conjunction with Figure 2.

[0051] In Figure 2, the system is a ring network structure constructed from ROADM nodes. This system includes multiple ROADM nodes, each capable of adding, removing, or passing multiplexed optical signals transmitted through it. Each transmission of an optical signal from one ROADM node to another can be understood as the transmission of a segment. The fact that an optical signal needs to pass through multiple ROADM nodes to reach the receiving end can be understood as the optical signal needing to undergo multiple cross-segment transmissions. The system shown in Figure 2 can be a channel extension system, for example, a C+L band system. Figure 2 is merely a schematic diagram and does not constitute a limitation on the applicable scenarios of the technical solutions provided in this application. For example, the embodiments of this disclosure can also be adapted to systems composed of FOADM nodes.

[0052] Referring to Figure 3, which illustrates a transmission link diagram provided by an embodiment of this disclosure, Figure 3 shows a possible transmission link from one ROADM node in Figure 2 to another ROADM node. Taking this transmission link as an example, from ROADM(a) node to ROADM(b) node, and assuming that the systems to which ROADM(a) and ROADM(b) belong are C+L band systems, to suppress the SRS effect, when the multiplexed optical signal passes through the ROADM node, a filling wave strategy can be adopted for multiple directions of the ROADM node. For example, multiple filling wave sources can be used for multiple directions of the ROADM node, generating multiple filling waves to ensure that the system is always in a full-wave configuration state, thereby guaranteeing system stability and performance. For ease of service signal management, the filling waves typically do not penetrate the ROADM node; instead, filling waves are regenerated in each direction of each ROADM node to fill the available channel.

[0053] While the use of fill wave strategy greatly enhances the stability of channel extension systems, some other problems remain. Taking the C+L band system as an example, in some possible scenarios, the C band is completely occupied by fill waves, while the L band carries service signals. In this case, if the fill wave source generating the fill wave for the C band malfunctions or stops working, all C band spurious waves will disappear. As the number of transmission segments increases, the power of the L band service signal will gradually weaken. After multiple segments, the L band service may fail to transmit normally due to insufficient power. That is, when the C band fill wave is abnormal, it will directly affect the L band service signal, potentially causing L band service interruption. Similarly, when the L band fill wave is abnormal, the C band service may also be affected due to OA saturation and slope changes.

[0054] In some related technologies, couplers are used to couple multiple fill wave sources from different directions. When some fill wave sources malfunction, dummy waves from multiple fill wave sources are coupled together, and then fill waves are provided to different directions, thus protecting each other. While this approach can protect multiple fill waves from each other, the waveforms of the individual fill waves are not entirely consistent. Furthermore, when some fill wave sources are not functioning, the overall fill wave power decreases, and the fill wave spectrum may change significantly. Therefore, to reduce service interruptions and ensure the reliability of the channel extension system, implementing an effective fill wave protection scheme is necessary.

[0055] In view of the above, embodiments of this disclosure provide a filling wave protection method, apparatus, board, system, computer-readable medium, and computer program product. A detailed description is provided below with reference to the accompanying drawings.

[0056] Referring to Figure 4, this disclosure provides a filling wave protection method, which includes steps S401 to S403.

[0057] In step S401, at least one of the multiple fill waves is determined to be abnormal.

[0058] In this embodiment of the disclosure, after the service transmission begins, at least one of the multiple filling waveforms can be identified as abnormal by real-time monitoring. Filling waveform abnormalities may include filling waveform failure, disappearance, or attenuation.

[0059] In some embodiments, step S401 may be implemented in, but is not limited to, the following manner.

[0060] Identify filling wave source anomalies corresponding to at least one filling wave. In this implementation, filling wave anomalies can be determined by identifying anomalies in at least one filling wave source that generates at least one filling wave. Fill wave source anomalies may include filling wave source failure, shutdown, signal attenuation, or configuration errors. Using this implementation, by directly detecting the state of the filling wave source, it is possible to quickly and accurately locate which filling waves are experiencing anomalies.

[0061] In some embodiments, determining that the filling wave light source corresponding to at least one filling wave is abnormal may include: detecting the state of the filling wave light source corresponding to at least one filling wave through a light source state detection module of the filling wave light source corresponding to at least one filling wave; and determining that the filling wave light source corresponding to at least one filling wave is abnormal when the state of the filling wave light source corresponding to at least one filling wave is abnormal.

[0062] In this embodiment, the light source state detection module can be a PD (Power Distribution Device). If the PD does not detect the output light signal of the filling wave light source, it can be determined that the state of the filling wave light source is abnormal. The following example illustrates this implementation.

[0063] In one example, referring to Figure 5, a schematic diagram of the internal light source state detection module of the filled wave light source provided in an embodiment of the present disclosure is shown.

[0064] In Figure 5, the light source status detection module for the filling wave light source is a PD (Distributed Photodetector). The filling wave light source in Figure 5 can be coupled via a coupler. Most of the optical signal output from the coupler is output through the output port, while a small portion is input to the PD. In some possible implementations, the ratio of the optical signal output from the coupler to the output port to the optical signal input to the PD is 95:5 or 97.5:2.5. In this example, whether the filling wave light source is abnormal can be determined by whether the PD can detect the optical signal. For example, if the PD of the filling wave light source corresponding to at least one filling wave does not detect the optical signal, the filling wave light source corresponding to that at least one filling wave is determined to be abnormal; conversely, if the PD of the filling wave light source can detect the optical signal, the filling wave light source is determined to be normal.

[0065] In step S402, preset attenuation value adjustment information is obtained, wherein the preset attenuation value adjustment information is the attenuation value adjustment information corresponding to at least one filling wave abnormality.

[0066] In this embodiment of the disclosure, after determining that the filling wave is abnormal, preset attenuation value adjustment information can be obtained.

[0067] In this embodiment of the disclosure, preset attenuation value adjustment information can be pre-configured so that after a filling wave anomaly, the preset attenuation value adjustment information corresponding to the anomaly can be used to deal with different filling wave anomaly situations.

[0068] In some embodiments, step S402 may be implemented in, but is not limited to, the following manner.

[0069] In one possible implementation, preset attenuation adjustment information is received from an optical network management device. The optical network management device can be, for example, a network management system or control center. In this implementation, the preset attenuation adjustment information can be pre-configured in the optical network management device and retrieved from it when needed.

[0070] In another possible implementation, preset attenuation value adjustment information is obtained from a storage module. The storage module can be, for example, a database, configuration file, or storage area. In this implementation, the preset attenuation value adjustment information can be pre-configured in the storage module and retrieved from the storage module when needed.

[0071] In step S403, the first attenuation value of the wavelength scheduling device is updated according to the preset attenuation value adjustment information to adjust the filling waveform so that the difference between the adjusted filling waveform and the initial waveform is less than a preset threshold. The initial waveform is the filling waveform when all multiple filling waveforms are normal.

[0072] In this embodiment of the disclosure, the first attenuation value is the current attenuation value of the wavelength scheduling device when at least one fill wave is abnormal.

[0073] In this embodiment, a preset threshold can be set according to actual application needs and scenarios. When the difference between the filling waveform and the initial waveform is less than the preset threshold, it can be understood that the filling waveform has been adjusted to a satisfactory state, that is, the adjusted filling waveform is basically consistent with the initial waveform. This means that the anomaly of the filling waveform has been effectively corrected, ensuring that the filling waveform entering the system remains basically unchanged, which can effectively guarantee the stability of the system. In this disclosure, the meaning of the filling waveform being basically consistent with the initial waveform is that the key parameters such as the amplitude, phase, and shape of the filling waveform have approached or reached the level under normal filling waveform conditions, thereby ensuring the reliability and stability of the system.

[0074] In this embodiment, after determining that at least one of the multiple filling waveforms is abnormal, preset attenuation value adjustment information corresponding to the abnormal condition of the at least one filling waveform can be obtained. Then, the current attenuation value of the wavelength scheduling device is updated according to the preset attenuation value adjustment information to adjust the filling waveform, so that the adjusted filling waveform is basically consistent with the initial waveform of the filling waveform. By adopting the scheme of this disclosure, by identifying whether the state of the filling waveform is abnormal, the attenuation value of the wavelength scheduling device can be dynamically adjusted to compensate for the changes in the filling waveform caused by the filling waveform abnormality. That is, dynamic optimization of the filling waveform can be achieved, thereby ensuring that the filling waveform in the channel extension system remains basically unchanged. This significantly reduces the impact of filling waveform abnormalities on system performance, thereby avoiding service interruptions in the channel extension system and ensuring system stability and high performance.

[0075] According to relevant technologies, in the solution of using couplers to solve the filling wave anomaly problem, although multiple filling waves can be mutually protected by the coupler, the waveforms of each filling wave are not completely consistent. When any filling wave becomes abnormal, the filling wave power entering the channel extension system will still decrease, and the filling wave waveform will also change significantly. These factors will adversely affect the system performance. In the solution of using automatic power regulation to solve the filling wave anomaly problem, the system performance is restored by calling automatic power regulation, but the recovery time is long and there is a risk of regulation failure.

[0076] Compared to related technologies, the solution disclosed herein does not require additional hardware or complex algorithms. It can quickly and efficiently restore the fill wave waveform after an anomaly without increasing costs. In other words, fill wave protection can be achieved at low cost, thereby ensuring the reliability of the channel extension system.

[0077] In some embodiments, the wavelength scheduling device includes WSS and / or VOA.

[0078] In this embodiment of the disclosure, the preset attenuation value adjustment information may include a preset attenuation value adjustment amount or a preset updated attenuation value. The preset attenuation value adjustment amount indicates the magnitude of the attenuation value adjustment; it refers to the amount of adjustment needed to the current attenuation value of the wavelength scheduling device to compensate for filling wave anomalies, representing the amount of attenuation that needs to be increased or decreased based on the current attenuation value. The preset updated attenuation value refers to a new attenuation value that can be directly applied to the wavelength scheduling device in the event of a filling wave anomaly, and is usually a fixed value. The preset attenuation value adjustment information can be obtained through, but is not limited to, pre-measurement, as illustrated below with an example.

[0079] In one example, at the start of the operation, a spectrometer or OPM is used to measure the combined waveform of multiple fill waves, and one fill wave is removed in sequence. After each fill wave is removed, the waveform of the removed fill wave is measured using a spectrometer or OPM. Based on a preset algorithm, the wavelength scheduling device can be calculated from the waveform data to determine the amount of attenuation adjustment or the corresponding new attenuation value when any fill wave fails.

[0080] In some embodiments, the preset attenuation value adjustment information includes a preset attenuation value adjustment amount. In this embodiment, step S403, updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information, includes increasing or decreasing the first attenuation value of the wavelength scheduling device by the preset attenuation value adjustment amount. This allows for rapid response to abnormal situations in the filling wave based on the preset attenuation value adjustment amount. By flexibly adjusting the attenuation value of the wavelength scheduling device by increasing or decreasing the preset attenuation value adjustment amount, the stability of the filling wave waveform is ensured, thereby guaranteeing the reliability and stability of the system.

[0081] In some embodiments, the preset attenuation value adjustment information includes a preset updated attenuation value. In this embodiment, step S403, updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information, includes adjusting the first attenuation value of the wavelength scheduling device to the preset updated attenuation value. Thus, by directly updating the first attenuation value of the wavelength scheduling device to the preset updated attenuation value, the calculation process is eliminated, allowing for rapid response to abnormal situations in the filling wave, ensuring the stability of the filling wave waveform, and guaranteeing the reliability and stability of the system.

[0082] In some embodiments, after updating the first attenuation value of the wavelength scheduling device according to preset attenuation value adjustment information, the filling wave protection method according to this disclosure further includes: after determining that at least one abnormal filling wave has returned to normal, redetermining the attenuation value of the wavelength scheduling device, and adjusting the current attenuation value of the wavelength scheduling device to the redetermined attenuation value, so that the difference between the filling wave waveform and the initial waveform is less than a preset threshold. In this embodiment, after updating the first attenuation value of the wavelength scheduling device, it can be detected whether the abnormal filling wave has returned to normal. If it is confirmed that at least one filling wave has returned to normal, the attenuation value of the wavelength scheduling device that can make the difference between the filling wave waveform and the initial waveform less than the preset threshold can be redetermined, and the current attenuation value of the wavelength scheduling device can be adjusted to the redetermined attenuation value. In this way, it can be ensured that after the filling wave returns to normal from abnormality, the attenuation value of the wavelength scheduling device can be restored to the value before adjustment, thereby maintaining system stability and high performance.

[0083] In this embodiment of the disclosure, the restoration of at least one abnormal filling wave to normal can correspond to a variety of possible situations. The following describes two possible situations as examples.

[0084] Case 1: At least one filler wave that was abnormal has returned to normal means that the filler wave has returned to the state before the fault. In this case, the attenuation value of the wavelength scheduling device is redefined as the first attenuation value, and the current attenuation value of the wavelength scheduling device is adjusted to the first attenuation value.

[0085] Scenario 2: At least one abnormal fill wave is restored to normal by replacing the corresponding fill wave light source. In this case, the attenuation value of the wavelength scheduling device is re-determined so that the difference between the fill wave waveform and the initial waveform is less than a preset threshold, and the current attenuation value of the wavelength scheduling device is adjusted to the re-determined attenuation value.

[0086] In some embodiments, determining that at least one abnormal fill wave has returned to normal may include: detecting the state of the fill wave light source corresponding to the at least one fill wave through a light source state detection module; and determining that the at least one abnormal fill wave has returned to normal if the state of the fill wave light source corresponding to the at least one fill wave is normal. For example, when the light source state detection module is a PD, the state of the fill wave light source can be determined to be normal if the PD detects the output optical signal of the fill wave light source. In this way, by linking the wavelength scheduling device (such as WSS and / or VOA) with the light source state detection module of the fill wave light source, after the light source state detection module detects an abnormality in the light source, that is, after determining that the fill wave is abnormal, the fill wave protection mechanism can be triggered immediately to quickly respond to the abnormal situation of the fill wave. By adjusting the attenuation value of the wavelength scheduling device, the fill wave waveform in the channel extension system can be kept basically unchanged, thereby avoiding service interruption of the channel extension system and ensuring the stability and high performance of the system.

[0087] To enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of this disclosure, the technical solutions provided by the embodiments of this disclosure will be further described below through specific embodiments.

[0088] Referring to Figure 6, a flowchart of another filling wave protection method provided by an embodiment of the present disclosure is shown. In this embodiment, multiple filling waves are generated by multiple filling wave light sources. The method includes the following steps S601 to S608.

[0089] In step S601, the service begins.

[0090] In step S602, multiple fill waves are configured to protect each other.

[0091] In this embodiment, multiple filled waves can be mutually protected by a coupler.

[0092] In step S603, preset attenuation value adjustment information is pre-configured.

[0093] In this embodiment, the pre-measured attenuation adjustment amount or corresponding new attenuation value (i.e., preset attenuation adjustment information) that WSS and / or VOA need to be adjusted when any filler wave fails can be pre-written into the optical network management device or the storage module of this device.

[0094] In step S604, it is determined whether there is an abnormality in the multi-channel filling wave.

[0095] In this embodiment, the presence of any abnormality in the multiple filled waves can be determined by detecting whether the corresponding filled wave light source has an output light signal through the PD of the filled wave light source corresponding to the multiple filled wave. If no output light signal is detected from the corresponding filled wave light source, it can be determined that the corresponding filled wave light source is abnormal, and thus the corresponding filled wave is abnormal, and then step S605 is executed; if an output light signal is detected from the corresponding filled wave light source, it can be determined that the corresponding filled wave light source is normal, and thus the corresponding filled wave is normal, and then step S608 is executed.

[0096] In step S605, preset attenuation value adjustment information is obtained, and the first attenuation value of WSS and / or VOA is updated according to the preset attenuation value adjustment information to adjust the filling waveform so that the difference between the adjusted filling waveform and the initial waveform is less than a preset threshold.

[0097] In this embodiment, the preset attenuation value adjustment information pre-configured in step S603 can be obtained in step S605.

[0098] In step S606, the faulty filling wave light source is inspected or replaced.

[0099] In step S607, if the abnormal filling wave is restored to its pre-fault state, the attenuation values ​​of the updated WSS and / or VOA are adjusted to the first attenuation value; or, the abnormal filling wave source is replaced to restore the filling wave to normal, the attenuation value is re-determined, and the current attenuation values ​​of WSS and / or VOA are adjusted to the re-determined attenuation values ​​so that the difference between the filling wave waveform and the initial waveform is less than a preset threshold.

[0100] In step S608, the system is normal.

[0101] To enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of this disclosure, the filling wave protection method provided by the embodiments of this disclosure will be described in detail below through four specific examples. In the following examples, the filling wave protection method is applied to the architecture shown in Figures 2 and 3 for illustration.

[0102] Example 1

[0103] Referring to Figure 7, which shows a schematic diagram of an example provided by an embodiment of this disclosure, in this example, four fill wave sources (fill wave source 1 to fill wave source 4) are coupled together by couplers and mutually protect each other, and are supplied to eight directions of the ROADM node. Each four ROADM node directions adopt the structure shown in Figure 7, with the fill wave sources in the eight directions mutually protecting each other. When one fill wave source malfunctions, the fill wave power of each path in the system will decrease by approximately 1.2 dB. By reducing the WSS attenuation value of the eight directions by 1.2 dB based on the current attenuation value using the fill wave protection method provided by this disclosure, the fill wave waveform of each path remains essentially unchanged, thereby making the system more stable. When a VOA exists in the system, as shown in the dashed box, the current attenuation value of the VOA can also be reduced by 1.2 dB.

[0104] Example 2

[0105] Referring to Figure 8, which shows a schematic diagram of another example provided by an embodiment of this disclosure, in this example, two fill wave sources (fill wave source 1 to fill wave source 2) are coupled through couplers and mutually protect each other, and are supplied to eight directions of the ROADM node. Each pair of ROADM node directions adopts the structure shown in Figure 8, and the fill wave sources in the eight directions mutually protect each other. When one fill wave source malfunctions, the power of the fill wave in the system decreases by about 3dB. By reducing the WSS attenuation value of the eight directions by 3dB based on the current attenuation value using the fill wave protection method provided by this disclosure, the waveform of the fill wave in each path remains essentially unchanged, thereby making the system more stable. When a VOA exists in the system, as shown in the dashed box, the current attenuation value of the VOA can also be reduced by 3dB.

[0106] Example 3

[0107] Referring to Figure 9, which shows a schematic diagram of another example provided by the embodiments of this disclosure, in this example, M filler wave sources (filler wave source 1 to filler wave source M) are coupled together by couplers and mutually protect each other, and are supplied to n directions of the ROADM node. Each of the M ROADM node directions adopts the structure shown in Figure 9, and the filler wave sources in each of the n directions mutually protect each other. When one of the filler wave sources malfunctions, the power of the filler wave in the system decreases by about -10*lg(1-1 / M) dB. After the filler wave protection method provided by this disclosure reduces the WSS attenuation value of the n directions by -10*lg(1-1 / M) dB from the current attenuation value, the waveform of the filler wave in each path remains basically unchanged, thereby making the system more stable. When a VOA exists in the system, as shown in the dashed box, the current attenuation value of the VOA can also be reduced by -10*lg(1-1 / M) dB.

[0108] Example 4

[0109] Referring to Figure 10, which shows a schematic diagram of another example provided by an embodiment of this disclosure, in this example, M filler wave sources (filler wave source 1 to filler wave source M) are coupled together by couplers and mutually protect each other, and are supplied to n directions of the ROADM node. Each of the M ROADM node directions adopts the structure shown in Figure 10, and the filler wave sources in each of the M directions mutually protect each other. When one of the filler wave sources malfunctions, the WSS attenuation values ​​in the n directions are updated by the filler wave protection method provided by this disclosure, so that the filler wave waveform of each path remains basically unchanged, thereby making the system more stable.

[0110] Referring to Figure 11, which shows a schematic diagram of the structure of a filling wave protection device provided in an embodiment of the present disclosure, the device includes: at least one processor 1101, at least one memory 1102, and one or more I / O interfaces 1103. The one or more I / O interfaces 1103 are connected between the processor 1101 and the memory 1102. The memory 1102 stores one or more computer programs, which are executed by the at least one processor 1101 to enable the at least one processor 1101 to implement the filling wave protection method according to the embodiments of the present disclosure.

[0111] Processor 1101 is a device with data processing capabilities, including but not limited to a central processing unit (CPU); memory 1102 is a device with data storage capabilities, including but not limited to random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and flash memory (FLASH); I / O interface 1103 (read-write interface) is connected between processor 1101 and memory 1102, enabling information exchange between processor 1101 and memory 1102, including but not limited to a data bus (Bus).

[0112] This disclosure also provides a filling wave light source board, on which a filling wave protection device according to an embodiment of this disclosure is provided.

[0113] This disclosure also provides a system comprising at least one filling wave protection device or at least one filling wave light source board according to an embodiment of this disclosure.

[0114] Referring to Figure 12, a schematic diagram of the ROADM networking system structure provided in an embodiment of the present disclosure is shown. The system includes at least one filled wave light source board according to an embodiment of the present disclosure.

[0115] Referring to Figure 13, a schematic diagram of the FOADM networking system structure provided in an embodiment of the present disclosure is shown. The system includes at least one filled wave light source board according to an embodiment of the present disclosure.

[0116] This disclosure also provides a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the filling wave protection method according to various embodiments of this disclosure.

[0117] This disclosure provides a computer program product, which includes a computer program that, when executed by a processor, implements the filling wave protection method according to various embodiments of this disclosure.

[0118] Those skilled in the art will understand that all or some of the steps, systems, and devices disclosed above, as functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0119] In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be executed by several physical components working together.

[0120] Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit (CPU), digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technique for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH) or other disk storage; read-only optical disc (CD-ROM), digital versatile disc (DVD) or other optical disc storage; magnetic cartridges, magnetic tapes, disk storage or other magnetic storage; and any other media that can be used to store desired information and can be accessed by a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0121] This disclosure has disclosed exemplary embodiments, and although specific terminology has been used, it is for general illustrative purposes only and should not be construed as limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this disclosure as set forth by the appended claims.

Claims

1. A filling wave protection method, comprising: Identify at least one fill wave anomaly among the multiple fill waves; Obtain preset attenuation value adjustment information, wherein the preset attenuation value adjustment information is the attenuation value adjustment information corresponding to the at least one filling wave abnormality case; According to the preset attenuation value adjustment information, the first attenuation value of the wavelength scheduling device is updated to adjust the filling wave waveform so that the difference between the adjusted filling wave waveform and the initial waveform is less than a preset threshold. The initial waveform is the filling wave waveform when all the multiple filling waves are normal.

2. The method according to claim 1, wherein, The wavelength scheduling device includes a wavelength selection switch and / or a variable optical attenuator.

3. The method according to claim 1, wherein, Obtaining preset attenuation value adjustment information includes: Receive the preset attenuation value adjustment information from the optical network management device; or The preset attenuation value adjustment information is obtained from the storage module.

4. The method according to any one of claims 1 to 3, wherein, The preset attenuation value adjustment information includes the preset attenuation value adjustment amount. Updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information includes: The first attenuation value of the wavelength scheduling device is increased or decreased by the preset attenuation value adjustment amount.

5. The method according to any one of claims 1 to 3, wherein, The preset attenuation value adjustment information includes a preset updated attenuation value. Updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information includes: The first attenuation value of the wavelength scheduling device is adjusted to the preset updated attenuation value.

6. The method according to claim 1, wherein, Identifying at least one fill waveform anomaly in a multi-channel fill waveform includes: Identify the anomaly of the filling wave source corresponding to the at least one filling wave.

7. The method according to claim 6, wherein, Determining the anomaly of the filling wave source corresponding to the at least one filling wave includes: The state of the filling wave light source corresponding to the at least one filling wave is detected by the light source state detection module. If the state of the filling wave light source corresponding to the at least one filling wave is abnormal, it is determined that the filling wave light source corresponding to the at least one filling wave is abnormal.

8. The method according to claim 1, wherein, After updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information, the method further includes: The at least one filler wave that was found to be abnormal has been restored to normal; The attenuation value of the wavelength scheduling device is redefined, and the current attenuation value of the wavelength scheduling device is adjusted to the redefined attenuation value so that the difference between the filled waveform and the initial waveform is less than a preset threshold.

9. The method according to claim 8, wherein, The restoration of at least one filling waveform to normal after determining the anomaly includes: The state of the filling wave light source corresponding to the at least one filling wave is detected by the light source state detection module. If the state of the filling wave light source corresponding to the at least one filling wave is normal, the at least one filling wave that was abnormal is restored to normal.

10. A fill wave protection device, comprising a memory and a processor; The memory stores a computer program that, when executed by the processor, implements the filling wave protection method according to any one of claims 1 to 9.

11. A fill wave light source board, wherein the fill wave protection device according to claim 10 is provided.

12. A system comprising at least one filling wave protection device according to claim 10 or at least one filling wave light source board according to claim 11.

13. A computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the filling wave protection method according to any one of claims 1 to 9.

14. A computer program product comprising a computer program that, when executed by a processor, implements the filling wave protection method according to any one of claims 1 to 9.

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