CN121239301A

CN121239301A - Filling wave protection methods, devices, boards, systems, media and products

Info

Publication number: CN121239301A
Application number: CN202410867169.0A
Authority: CN
Inventors: 张仲书; 陈欢; 李奕祺; 杜宇霆; 叶斐; 施鹄; 王东
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2024-06-28
Filing date: 2024-06-28
Publication date: 2025-12-30
Also published as: WO2026001756A1

Abstract

This disclosure provides a filling wave protection method, comprising: determining that at least one of multiple filling waves is abnormal; acquiring 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 a first attenuation value of a 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 refers to the filling wave waveform corresponding to the condition that all multiple filling waves are normal. This disclosure also provides a filling wave protection device, a filling wave light source board, a system, a computer-readable medium, and a computer program product.

Description

Method, device, single board, system, medium and product for protecting filling wave

Technical Field

The present disclosure relates to the field of optical transmission network communications, and in particular, to a method, an apparatus, a board, a system, a computer readable medium, and a computer program product for protecting a filler wave.

Background

In the field of optical transmission network communication, with the rapid increase of communication capacity, the wavelength division multiplexing technology can simultaneously transmit a plurality of optical signals with different wavelengths in a single optical fiber, and becomes a core technology for improving transmission efficiency. The channel expansion technology is used as a further development of the wavelength division multiplexing technology, can expand the available wave band on the basis of the traditional wave band, further increases the number of the multiplexed wave channels in the optical fiber, and can remarkably improve the transmission capacity of the channel expansion system.

In a channel expansion system, due to the wider spectral range, the stimulated raman scattering (Stimulated RAMAN SCATTERING, SRS) effect becomes a key factor affecting the system performance. The SRS effect causes the optical power to shift from a short wavelength to a long wavelength, and this shift has a cumulative effect. The persistent shift of Optical power after undergoing transmission over multiple spans may result in severe non-uniformity of Optical power distribution at the receiving end and significant non-planarity of Optical signal-to-Noise Ratio (OSNR), resulting in failure to meet the requirements of system performance. 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 flow is extremely complex.

In order to restrain the influence of SRS effect on system performance, a wave channel expansion system adopts a filling wave strategy to ensure the stable operation of the system. The system is always in a full wave configuration state by adopting a filling wave strategy, and the power balance and management can be performed in a follow-up mode according to a 'true wave/false wave interchange' principle after the system is started and initial adjustment is completed. Therefore, the system can be quickly restored to be stable when the system is operated in the face of dynamic wavelength add-drop operation, and interference of wavelength change on service performance on the existing channel is reduced. However, when the filling wave is abnormal, it may cause a service interruption and affect system performance. Therefore, in order to ensure the reliability of the channel expansion system and reduce the service interruption, it is necessary to implement an effective filler wave protection scheme.

Disclosure of Invention

The present disclosure provides a method, apparatus, single board, system, computer readable medium and computer program product for filler wave protection.

In a first aspect, an embodiment of the present disclosure provides a method for protecting a filler wave, where the method includes determining that at least one filler wave in multiple filler waves is abnormal, obtaining preset attenuation value adjustment information, where the preset attenuation value adjustment information is attenuation value adjustment information corresponding to at least one filler wave in abnormal conditions, and updating a first attenuation value of a wavelength scheduling device according to the preset attenuation value adjustment information to adjust a filler wave waveform, so that a degree of difference between the adjusted filler wave waveform and an initial waveform is smaller than a preset threshold, where the initial waveform is a filler wave waveform corresponding to multiple filler waves in normal conditions.

In a second aspect, an embodiment of the present disclosure provides a filling wave protection device, including a memory and a processor, where the memory stores a computer program executable by the processor, and the computer program implements the filling wave protection method of the first aspect when executed by the processor.

In a third aspect, an embodiment of the present disclosure provides a filling wave light source board, on which the filling wave protection device of the second aspect is disposed.

In a fourth aspect, embodiments of the present disclosure provide a system comprising at least one of the above-described second aspect of a filling wave protection device or at least one of the above-described third aspect of a filling wave light source veneer.

In a fifth aspect, embodiments of the present disclosure provide a computer-readable medium having stored thereon a computer program which, when executed by a processor, implements the method of the first aspect of the filler wave protection.

In a sixth aspect, embodiments of the present disclosure provide a computer program product comprising a computer program which, when executed by a processor, implements the method of the first aspect of the filler wave protection.

In an embodiment of the present disclosure, for a channel expansion system adopting a filling wave strategy, after determining that at least one path of filling wave in multiple paths of filling waves is abnormal, preset attenuation value adjustment information corresponding to the situation that the at least one path of filling wave is abnormal may be obtained, and then a current attenuation value of a wavelength scheduling device is updated according to the preset attenuation value adjustment information, so as to adjust a filling wave waveform, so that the adjusted filling wave waveform is substantially consistent with an initial waveform of the filling wave. By adopting the scheme of the present disclosure, by identifying whether the state of the filling wave is abnormal, the attenuation value of the wavelength scheduling device can be dynamically adjusted to adjust the change of the filling wave waveform caused by the abnormal filling wave, i.e. the dynamic optimization of the filling wave waveform can be realized, so that the filling wave waveform in the channel expansion system is basically unchanged, the influence on the system performance when the filling wave is abnormal can be obviously reduced, thereby avoiding the service interruption of the channel expansion system and ensuring the stability and high performance of the system.

Drawings

In the drawings of the embodiments of the present disclosure:

Fig. 1 is a schematic diagram of SRS power transfer according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a system architecture according to an embodiment of the disclosure;

Fig. 3 is a schematic diagram of a transmission link according to an embodiment of the disclosure;

FIG. 4 is a flow chart of a method for protecting a filler wave according to an embodiment of the present disclosure;

Fig. 5 is a schematic diagram of a detection module for the internal light source state of a filling wave light source according to an embodiment of the disclosure;

FIG. 6 is a flow chart of another method of fill wave protection provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of one embodiment provided by embodiments of the present disclosure;

FIG. 8 is a schematic diagram of another embodiment provided by an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of yet another embodiment provided by an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of yet another embodiment provided by an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a filling wave protection device according to an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of a ROADM networking system according to embodiments of the present disclosure;

Fig. 13 is a schematic structural diagram of a FOADM networking system according to an embodiment of the present disclosure.

Detailed Description

For a better understanding of the technical solutions of the present disclosure, the following describes in detail a method, an apparatus, a board, a system, a computer readable medium and a computer program product for protecting a filling wave provided by the embodiments of the present disclosure with reference to the accompanying drawings.

The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, but the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The accompanying drawings, which are included to provide a further understanding of embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the detailed embodiment, do not limit the disclosure. The above and other features and advantages will become more readily apparent to those skilled in the art from the description of the detailed embodiments with reference to the accompanying drawings.

Embodiments of the disclosure and features of embodiments may be combined with each other without conflict.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The term "and/or" as used in this disclosure includes any and all combinations of one or more of the associated listed items. As used in this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising," "including," and "includes" as used in this disclosure "made by.,. The presence of said features, integers, steps, operations, elements, and/or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In the present disclosure, unless otherwise specified, the following technical terms are to be understood as follows:

1) Wavelength division multiplexing (WAVELENGTH DIVISION MULTIPLEXING, WDM) is a technique that enables the simultaneous transmission of multiple optical signals of different wavelengths in a single optical fiber.

2) Dense wavelength division multiplexing (DENSE WAVELENGTH Division Multiplexing, DWDM), a WDM technology with very narrow channel wavelength spacing, typically less than or equal to 100GHz. The wavelengths used by devices employing this technology may cover one or more spectral bands.

3) An Optical Add/Drop Multiplexer (OADM) node is a network element used in a WDM Optical communication system, and its main functions include adding a new wavelength signal to a multiplexed Optical signal (including signals of a plurality of different wavelengths) passing through the OADM node, and/or deleting one or more wavelength signals from the multiplexed Optical signal, i.e., an Add and/or Drop function may be implemented, and other Optical signals besides Add and/or Drop may directly pass through (abbreviated as pass-through) the OADM node.

4) Reconfigurable optical add-Drop Multiplexer (ROADM) nodes, which are also a network element used in WDM optical communication systems, have the main functions of adding new wavelength signals to a path of multiplexed optical signals (including signals of a plurality of different wavelengths) passing through the ROADM node and/or deleting one or more wavelength signals from the multiplexed optical signals, i.e. an add and/or Drop function may be implemented, and other optical signals other than add and/or Drop may pass directly through the ROADM node. In addition, the wavelength signals of the upper path and/or the lower path can be dynamically adjusted through the network management remote configuration, so that the upper path and/or the lower path configuration or the direct connection configuration of any wavelength can be realized.

5) A fixed optical add-Drop Multiplexer (FOADM) node, which is also a network element used in a WDM optical communication system, has the main functions of adding a fixed wavelength signal to a multiplexed optical signal (including signals of a plurality of different wavelengths) passing through the FOADM node, and/or deleting one or more fixed wavelength signals from the multiplexed optical signal, i.e. an add and/or Drop function may be implemented for the fixed wavelength signal, and other optical signals other than the add and/or Drop may pass directly through the FOADM node.

6) An optical amplifier (Optical Amplifier, OA) is a critical component in an optical communication system that is used to amplify an optical signal to compensate for signal attenuation in optical fiber transmission.

7) An optical post-amplifier (Optical Booster Amplifier, OBA) is an optical amplifier in an optical communication system for boosting the power of an optical signal, typically at the end of an optical fiber transmission link, to compensate for the loss of the optical signal in the optical fiber transmission.

8) A wavelength scheduling device is a device for managing and controlling the wavelength of an optical signal in an optical communication system. For example, a wavelength selective switch (WAVELENGTH SELECTIVE SWITCH, WSS), a variable optical attenuator (Variable Optical Attenuator, VOA) may be included, and the WSS and VOA may work cooperatively to achieve dynamic scheduling and optimization of wavelengths in an optical network.

9) The WSS is a core device in the ROADM optical network, and has a screening function for different wavelengths.

10 A VOA), an important optical passive device in an optical communication system, and real-time control of signals is realized by attenuating transmission optical power.

11 A PhotoDiode (PD), which is a semiconductor photodetector that can convert an optical signal into an electrical signal.

12 An optical conversion unit (Optical Transform Unit, OTU), which is a key component in the wavelength division system and is responsible for the access processing of optical signals.

13 Optical performance monitor (Optical Performance Monitor, OPM), an instrument for monitoring and evaluating optical signal performance in a fiber optic communications network. The OPM can measure parameters such as intensity, frequency, phase, wavelength and the like of the optical signal in real time, so that the performance of the optical network can reach the expected level.

14 A filler wave, a non-business optical wave used in an optical communication system, for filling the unused optical spectrum, maintaining the stability and balance of system power.

15 Referring to fig. 1, an SRS power transfer schematic diagram provided for an embodiment of the present disclosure is shown in fig. 1, where a channel expansion system is a c+l band system, and the c+l band system occupies a wider frequency spectrum, so that the SRS is greatly affected. As can be seen from fig. 1, the c+l band system is affected by SRS, resulting in a shift of optical power from short wavelength to long wavelength, which has a cumulative effect, and the continuous shift of optical power after undergoing transmission over multiple spans may cause a series of problems, thereby affecting system performance and stability.

Referring to fig. 2, a schematic system architecture provided for an embodiment of the present disclosure is described with reference to fig. 2, where a scenario in which the present disclosure is applicable is described. The system in fig. 2 is a ring networking structure constructed by ROADM nodes, where the system includes multiple ROADM nodes, each ROADM node may add, drop, or pass through a multiplexed optical signal transmitted through it, each optical signal transmitted from one ROADM node to another ROADM node may be understood as a segment being transmitted, and an optical signal that needs to be transmitted through multiple ROADM nodes to reach a receiving end may be understood as a signal that needs to be transmitted through multiple spans. The system shown in fig. 2 may be a channel expansion system, for example, a c+l band system. Fig. 2 is only a schematic diagram, and does not limit the applicable scenario of the technical solution provided by the present application, for example, the embodiments of the present disclosure may also be adapted to a system composed of FOADM nodes.

Referring to fig. 3, a schematic diagram of a transmission link is provided for an embodiment of the present disclosure, and fig. 3 illustrates one possible transmission link from one particular ROADM node to another particular ROADM node in fig. 2. Taking the transmission link as a transmission link from a node of the ROADM (a) to a node of the ROADM (b), taking a c+l band system as an example of a system to which the node of the ROADM (a) and the node of the ROADM (b) belong, in order to suppress the SRS effect, a filler wave strategy can be adopted for multiple directions of the node of the ROADM, for example, multiple filler wave light sources can be adopted for multiple directions of the node of the ROADM, and multiple filler waves generated by the multiple filler wave light sources ensure that the system is always in a full wave configuration state so as to ensure the stability and performance of the system. To facilitate traffic signal management, the filler wave typically does not penetrate the ROADM nodes, but instead is regenerated in each direction of the respective ROADM nodes to fill the available channels.

While the use of a filler wave strategy greatly enhances the stability of the channel expansion system, there are still some other problems. Still taking a c+l band system as an example, in some possible scenarios, the C band is fully occupied by the filler wave, while the L band carries the traffic signal. In this case, if the filling wave light source generating the filling wave for the C-band fails or stops working, all the C-band spurious waves will disappear, and as the number of transmission spans increases, the power of the L-band service signal will gradually decrease, and after the transmission of the L-band service signal through multiple spans, the L-band service may not be normally transmitted due to the excessively low power. That is, when the filling wave of the C-band is abnormal, the service signal of the L-band will be directly affected, and the service interruption of the L-band may be caused. Similarly, when the filling wave of the L-band is abnormal, the C-band service may also have a certain influence on the service due to the saturation of OA and the change of slope.

In some related technologies, a plurality of filling wave light sources in different directions are coupled by using a coupler, and when a part of the filling wave light sources are abnormal, after spurious waves of the plurality of filling wave light sources are coupled, filling waves are provided in different directions, that is, the filling wave light sources in the directions are mutually protected. Although the scheme can protect the filling waves in multiple directions, because the waveforms of the filling waves are not completely consistent, when the filling wave light source in part directions is not operated, the power of the whole filling wave is also reduced, and the spectrum of the filling wave can be changed greatly. Therefore, in order to reduce service interruption and ensure reliability of the channel expansion system, it is necessary to implement an effective filler wave protection scheme.

In view of this, embodiments of the present disclosure provide a method, an apparatus, a board, a system, a computer readable medium, and a computer program product for protecting a filler wave. The following detailed description refers to the accompanying drawings.

In a first aspect, referring to fig. 4, a flowchart of a method for protecting a filling wave according to an embodiment of the disclosure is provided, where the method includes:

s401, determining that at least one of the multiple paths of filling waves is abnormal.

In the embodiment of the disclosure, after the service starts to be transmitted, at least one of the multiple paths of filling waves is abnormal by monitoring the multiple paths of filling waves in real time. Wherein the filling wave anomalies may include filling wave faults, vanishing or decaying, etc.

In some embodiments, S401 may be implemented by, but is not limited to, the following:

And determining that the filling wave light source corresponding to at least one path of filling wave is abnormal. In such an implementation, the fill wave anomalies may be determined by determining at least one fill wave light source anomaly that produces at least one fill wave. Wherein the fill wave light source anomalies may include fill wave light source faults, shut down, signal attenuation, or configuration errors, etc. By adopting the implementation mode, the abnormal filling wave can be rapidly and accurately positioned by directly detecting the state of the filling wave light source.

In some embodiments, determining the filling wave light source abnormality corresponding to the at least one filling wave may include detecting, by a light source state detection module of the filling wave light source corresponding to the at least one filling wave, a state of the filling wave light source corresponding to the at least one filling wave, and determining the filling wave light source abnormality corresponding to the at least one filling wave if the state of the filling wave light source corresponding to the at least one filling wave is abnormal.

In the embodiment of the disclosure, the light source state detection module may be a PD, and in a case where the PD does not detect the output light signal of the filler wave light source, it may be determined that the state of the filler wave light source is abnormal. This implementation is described below in one example.

In an example, referring to fig. 5, a schematic diagram of an internal light source state detection module of a filling wave light source according to an embodiment of the present disclosure is provided, the light source state detection module of the filling wave light source in fig. 5 is a PD, the filling wave light source in fig. 5 may be coupled by a coupler, a majority of optical signals output by the coupler are output through an optical outlet, a small part of optical signals are input into the PD, and in some possible implementations, a ratio of optical signals output to the optical outlet by the coupler to optical signals input to the PD is 95:5 or 97.5:2.5. In this example, whether the filler wave light source is abnormal may be determined by whether the PD can detect the optical signal. For example, if it is determined that the PD of the filler wave light source corresponding to at least one filler wave does not detect an optical signal, it is determined that the filler wave light source corresponding to the at least one filler wave is abnormal, whereas if the PD of the filler wave light source can detect an optical signal, it is determined that the filler wave light source is normal.

S402, acquiring preset attenuation value adjustment information, wherein the preset attenuation value adjustment information is attenuation value adjustment information corresponding to at least one path of filling wave under abnormal conditions.

In the embodiment of the disclosure, after determining that the filling wave is abnormal, preset attenuation value adjustment information may be obtained.

In the embodiment of the disclosure, the preset attenuation value adjustment information may be preconfigured to cope with different abnormal conditions of the filling wave by adopting the preset attenuation value adjustment information corresponding to the abnormality after the filling wave is abnormal.

In some embodiments, S402 may be implemented by, but not limited to, the following:

In one possible implementation, preset attenuation value adjustment information is received from an optical network management device. The optical network management device may be, for example, a network management system or a control center. In such an implementation, the preset attenuation value adjustment information may be preconfigured at the optical network management device, and obtained from the optical network management device when needed for use.

In another possible implementation, the preset attenuation value adjustment information is obtained from the storage module. The storage module may be, for example, a database, a configuration file, a storage area, or the like. In such an implementation, the preset attenuation value adjustment information may be preconfigured in the storage module, and obtained from the filler wave protection when needed for use.

S403, updating a first attenuation value of the wavelength scheduling device according to preset attenuation value adjustment information to adjust the filling wave waveform, so that the difference between the adjusted filling wave waveform and an initial waveform is smaller than a preset threshold, wherein the initial waveform is a corresponding filling wave waveform under the condition that multiple paths of filling waves are normal.

In an embodiment of the disclosure, the first attenuation value is a current attenuation value of the wavelength scheduling device when at least one of the filler waves is abnormal.

In the embodiment of the disclosure, the preset threshold value can be set according to actual application requirements and scenes. When the degree of difference between the filling wave waveform and the initial waveform is smaller than the preset threshold, it is understood that the filling wave waveform has been adjusted to a satisfactory state, that is, the adjusted filling wave waveform is substantially consistent with the initial waveform. This means that the anomalies of the filling wave have been effectively corrected, ensuring that the waveform of the filling wave entering the system is substantially unchanged, and effectively ensuring the stability of the system. In the present disclosure, the meaning that the waveform of the filling wave is substantially consistent with the initial waveform means that the critical parameters such as the amplitude, phase, shape, etc. of the filling wave have been approximated or reached to the level of the filling wave under the normal condition, thereby ensuring the reliability and stability of the system.

In the embodiment of the disclosure, after determining that at least one of the multiple paths of filling waves is abnormal, preset attenuation value adjustment information corresponding to the abnormal condition of the at least one path of filling waves can be obtained, and then the current attenuation value of the wavelength scheduling device is updated according to the preset attenuation value adjustment information so as to adjust the waveform of the filling waves, so that the waveform of the adjusted filling waves is basically consistent with the initial waveform of the filling waves. By adopting the scheme of the present disclosure, by identifying whether the state of the filling wave is abnormal, the attenuation value of the wavelength scheduling device can be dynamically adjusted to adjust the change of the filling wave waveform caused by the abnormal filling wave, i.e. the dynamic optimization of the filling wave waveform can be realized, so that the filling wave waveform in the channel expansion system is basically unchanged, the influence on the system performance when the filling wave is abnormal can be obviously reduced, thereby avoiding the service interruption of the channel expansion system and ensuring the stability and high performance of the system.

In the prior art, in the scheme for solving the problem of abnormal filling wave by adopting the coupler, although the multipath filling waves can be mutually protected by the coupler, the waveform of each filling wave is not completely consistent, after any filling wave is abnormal, the power of the filling wave entering the channel expansion system still can be reduced, meanwhile, the waveform of the filling wave can be greatly changed, and all the factors can have adverse effects on the performance of the system. In the prior art, in the scheme for solving the problem of filling wave abnormality by adopting automatic power adjustment, the system performance is recovered by calling the automatic power adjustment, the recovery time is longer, and the risk of adjustment failure exists.

Compared with the scheme in the prior art, the scheme disclosed by the invention does not need additional hardware equipment or complex algorithm, and can quickly and efficiently realize the recovery of the filling wave waveform after the abnormality of the filling wave on the premise of not increasing the cost additionally, so that the filling wave protection can be realized with low cost, and the reliability of a channel expansion system is ensured.

In some embodiments, the wavelength scheduling device comprises a wavelength selective switch and/or a variable optical attenuator.

In an embodiment of the present 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 is used for indicating the amplitude of attenuation value adjustment, and is the adjustment amount needed to be carried out on the current attenuation value of the wavelength scheduling device in order to compensate the abnormal filling wave, and represents the attenuation value which needs to be increased or decreased on the basis of the current attenuation value. The preset updated attenuation value refers to a new attenuation value, usually a fixed value, which can be directly applied to the wavelength scheduling device in the case of abnormal filling waves. The preset attenuation value adjustment information may be obtained by, but not limited to, a pre-measurement, and is described below as an example.

In one example, when the service starts, a spectrometer or an OPM is used to measure the composite waveform of multiple paths of filling waves, and one path of filling wave is removed in sequence, each path of filling wave removed is measured by using the spectrometer or the OPM, and the waveform data based on a preset algorithm can calculate the attenuation value adjustment amount or the corresponding new attenuation value required to be adjusted by the wavelength scheduling device when any path of filling wave fails.

In some embodiments, the preset attenuation value adjustment information includes a preset attenuation value adjustment amount, and in this embodiment, updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information in S403 includes increasing or decreasing the first attenuation value of the wavelength scheduling device by the preset attenuation value adjustment amount. Therefore, the attenuation value of the wavelength scheduling device can be flexibly adjusted by increasing or decreasing the preset attenuation value adjustment quantity according to the preset attenuation value adjustment quantity to quickly respond to the abnormal condition of the filling wave, the stability of the waveform of the filling wave is ensured, and the reliability and the stability of the system can be ensured.

In some embodiments, the preset attenuation value adjustment information comprises a preset updated attenuation value, and in this embodiment, updating the first attenuation value of the wavelength scheduling device in accordance with the preset attenuation value adjustment information in S403 comprises adjusting the first attenuation value of the wavelength scheduling device to the preset updated attenuation value. Therefore, the first attenuation value of the wavelength scheduling device is directly updated to be a preset updated attenuation value, so that a calculation process is omitted, the abnormal condition of the filling wave can be responded quickly, the stability of the waveform of the filling wave is ensured, and the reliability and the stability of the system can be ensured.

In some embodiments, after updating the first attenuation value of the wavelength scheduling device according to the preset attenuation value adjustment information, determining that at least one abnormal filling wave is recovered to be normal, determining the attenuation value of the wavelength scheduling device again, 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 smaller than a preset threshold. In this embodiment, after updating the first attenuation value of the wavelength scheduling device, it may be detected whether the abnormal filler wave has been restored to normal. If it is confirmed that at least one of the filler waves has been restored to normal, an attenuation value of the wavelength scheduling apparatus capable of making a degree of difference between the filler wave waveform and the initial waveform smaller than a preset threshold value may be redetermined and adjusted to the redetermined attenuation value. In this way, it is ensured that the attenuation values of the wavelength scheduling device can be restored to before adjustment after the filling wave is restored to normal from an anomaly, thereby maintaining system stability and high performance.

In the embodiment of the disclosure, at least one abnormal filler wave recovery may correspond to a plurality of possible situations, and two possible situations are taken as an illustration.

In case 1, that the abnormal at least one path of filling wave is recovered to be in a state before the filling wave is recovered to be in a fault state, in this case, the attenuation value of the wavelength scheduling device is redetermined to be a first attenuation value, and the current attenuation value of the wavelength scheduling device is adjusted to be the first attenuation value.

And 2, recovering at least one path of abnormal filling wave to be normal by replacing the corresponding filling wave light source, and under the condition, re-determining the attenuation value of the wavelength scheduling equipment capable of enabling the difference degree between the filling wave waveform and the initial waveform to be smaller than a preset threshold value, and adjusting the current attenuation value of the wavelength scheduling equipment to be the re-determined attenuation value.

In some embodiments, determining that the at least one abnormal filler wave is restored to normal may include detecting, by a light source state detection module of a filler wave light source corresponding to the at least one filler wave, a state of the filler wave light source corresponding to the at least one filler wave, and determining that the at least one abnormal filler wave is restored to normal if the state of the filler wave light source corresponding to the at least one filler wave is normal. For example, when the light source state detection module is a PD, it may be determined that the state of the filler wave light source is normal in the case where the PD detects the output light signal of the filler wave light source. In this way, the wavelength scheduling device (such as WSS and/or VOA) is linked with the light source state detection module of the filling wave light source, after the light source state detection module detects the light source abnormality, namely after the filling wave abnormality is determined, the filling wave protection mechanism can be immediately triggered, the abnormal situation of the filling wave can be responded quickly, the waveform of the filling wave in the channel expansion system can be ensured to be basically unchanged by adjusting the attenuation value of the wavelength scheduling device, thereby avoiding the service interruption of the channel expansion system and ensuring the stability and high performance of the system.

In order to enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present disclosure, the following further describes the technical solutions provided by the embodiments of the present disclosure through specific embodiments:

Referring to fig. 6, another method flow chart of a method for protecting a filling wave is provided for an embodiment of the disclosure, in which a plurality of filling wave light sources are used to generate a plurality of corresponding filling waves, the method includes the following steps:

S601, the service starts.

S602, configuring multi-path filling waves to be mutually protected.

In this embodiment, the protection of multiple filler waves from each other can be achieved by a coupler.

S603, pre-configuring preset attenuation value adjustment information.

In this embodiment, the attenuation value adjustment amount or the corresponding new attenuation value, that is, the preset attenuation value adjustment information, which is needed to be adjusted by the WSS and/or the VOA when the pre-measured attenuation value adjustment amount and the corresponding new attenuation value are pre-written into the optical network management device or the storage module of the device when any one of the filling waves fails.

S604, judging whether the multipath filling waves have abnormal filling waves.

In this embodiment, whether or not there is a filling wave abnormality in the multiple filling waves can be determined by detecting whether or not there is an output optical signal from the corresponding filling wave light source by the PD of the filling wave light source corresponding to the multiple filling waves. If no output light signal of the corresponding filler wave light source is detected, the corresponding filler wave light source abnormality can be determined, and further the corresponding filler wave abnormality can be determined, then the S605 is continued, and if the corresponding filler wave light source has an output light signal, the corresponding filler wave light source is determined to be normal, and further the corresponding filler wave is determined to be normal, then the S608 is continued.

S605, acquiring preset attenuation value adjustment information, and updating a first attenuation value of the WSS and/or the VOA according to the preset attenuation value adjustment information so as to adjust the filling wave waveform, so that the difference between the adjusted filling wave waveform and the initial waveform is smaller than a preset threshold value.

In this embodiment, S605 may acquire the preset attenuation value adjustment information preconfigured in S603.

S606, overhauling or replacing the abnormal filling wave light source.

S607, determining that the abnormal filling wave is recovered to a state before the fault, and adjusting the attenuation value of the updated WSS and/or VOA to a first attenuation value, or recovering the filling wave to be normal by replacing the abnormal filling wave light source, re-determining the attenuation value, and adjusting the current attenuation value of the WSS and/or the VOA to the re-determined attenuation value so that the difference degree between the filling wave waveform and the initial waveform is smaller than a preset threshold value.

S608, the system is normal.

In order to enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present disclosure, the following describes in detail the method for protecting a filling wave provided by the embodiments of the present disclosure by using four specific embodiments, and in the following embodiments, the application of the method for protecting a filling wave to the architecture shown in fig. 2 and 3 is exemplified.

Example 1

Referring to fig. 7, a schematic diagram of an embodiment of the disclosure is provided, in this embodiment, four filler wave light sources (filler wave light sources 1 to 4) are mutually protected after being coupled by a coupler, and in 8 directions to a ROADM node, each four ROADM node directions adopt the structure shown in fig. 7, and the filler wave light sources in 8 directions are mutually protected. When one of the filling wave light sources is abnormal, the filling wave power of each path in the system is reduced by about 1.2dB, and the WSS attenuation values in 8 directions are reduced by 1.2dB on the basis of the current attenuation value by the filling wave protection method provided by the disclosure, the filling wave waveform of each path is basically unchanged, so that the system is more stable. When a VOA is present in the system, the current attenuation value of the VOA may also be reduced by 1.2dB, as indicated by the dashed box.

Example two

Referring to fig. 8, a schematic diagram of another embodiment provided in an embodiment of the disclosure is provided, in this embodiment, two filler wave light sources (filler wave light source 1-filler wave light source 2) are mutually protected after being coupled by a coupler, and in 8 directions to a ROADM node, each two ROADM node directions adopt the structure shown in fig. 8, and the filler wave light sources in 8 directions are mutually protected. When one of the filling wave light sources is abnormal, the power of the filling wave in the system is reduced by about 3dB, and after the WSS attenuation values in 8 directions are reduced by 3dB on the basis of the current attenuation value by the filling wave protection method provided by the disclosure, the waveform of each filling wave is basically unchanged, so that the system is more stable. When a VOA is present in the system, the current attenuation value of the VOA may also be reduced by 3dB, as indicated by the dashed box.

Example III

Referring to fig. 9, a schematic diagram of another embodiment provided in an embodiment of the disclosure is provided, in this embodiment, M filler wave light sources (filler wave light sources 1 to filler wave light sources M) are mutually protected after being coupled by a coupler, and n directions to ROADM nodes are given, each M ROADM node direction adopts the structure shown in fig. 9, and the filler wave light sources in each n directions are mutually protected. When one of the filler wave light sources is abnormal, the power of the filler wave in the system is reduced by about-10 x/g (1-1/M) dB, and the WSS attenuation values in n directions are reduced by-10 x/g (1-1/M) dB on the basis of the current attenuation value by the filler wave protection method provided by the disclosure, the filler wave waveform of each path is basically unchanged, and the system is further more stable. When a VOA is present in the system, the current attenuation value of the VOA may also be reduced by-10 x lg (1-1/M) dB, as indicated by the dashed box.

Example IV

Referring to fig. 10, a schematic diagram of another embodiment provided in an embodiment of the disclosure is provided, in this embodiment, M filler wave light sources (filler wave light sources 1 to filler wave light sources M) are mutually protected after being coupled by a coupler, and in n directions to ROADM nodes, each of the directions of the M ROADM nodes adopts the structure shown in fig. 10, and the filler wave light sources in each of the M directions are mutually protected. When one of the filler wave light sources is abnormal, WSS attenuation values in n directions are updated through the filler wave protection method provided by the disclosure, so that the filler wave waveform of each path is basically unchanged, and the system is more stable.

In a second aspect, referring to FIG. 11, a schematic structural diagram of a fill wave protection device according to an embodiment of the present disclosure is provided, which includes at least one processor 1101, at least one memory 1102, and one or more I/O interfaces 1103. One or more I/O interfaces 1103 are coupled between processor 1101 and memory 1102. The memory 1102 stores one or more computer programs that are executed by the at least one processor 1101 to enable the at least one processor 1101 to implement the method of filler wave protection as described above in the first aspect and any one of the possible embodiments of the first aspect.

The processor 1101 is a device with data processing capability, including but not limited to a Central Processing Unit (CPU), the memory 1102 is a device with data storage capability, including but not limited to a random access memory (RAM, more specifically SDRAM, DDR, etc.), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a FLASH memory (FLASH), and an I/O interface 1103 (read/write interface) is connected between the processor 1101 and the memory 1102, so as to enable information interaction between the processor 1101 and the memory 1102, including but not limited to a data Bus (Bus), etc.

Referring to fig. 12, a schematic structural diagram of a ROADM networking system according to an embodiment of the disclosure is provided, where the system includes at least one filler wave light source board of the third aspect.

Referring to fig. 13, a structural schematic diagram of a FOADM networking system according to an embodiment of the present disclosure is provided, where the system includes at least one filler wave light source board of the third aspect.

In a fifth aspect, embodiments of the present disclosure provide a computer readable medium having stored thereon a computer program which, when executed by a processor, implements any one of the possible embodiments of the first aspect and the first aspect.

In a sixth aspect, embodiments of the present disclosure provide a computer program product comprising a computer program which, when executed by a processor, implements any one of the possible embodiments of the first aspect and the first aspect.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components, for example, one physical component may have a plurality of functions, or one function or step may be cooperatively performed by several physical components.

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. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically charged erasable programmable read-only memory (EEPROM), FLASH memory (FLASH) or other magnetic disk storage, compact disk read-only memory (CD-ROM), digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage, and any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

The present disclosure has disclosed example embodiments, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, it will be apparent to one skilled in the art that features, characteristics, and/or elements described in connection with a particular embodiment may be used alone or in combination with other embodiments unless explicitly stated otherwise. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the disclosure as set forth in the appended claims.

Claims

1. A filling wave protection method, the method comprising:

Identify at least one of the multiple fill waveforms as anomaly;

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 waveform so that the difference between the adjusted filling waveform and the initial waveform is less than a preset threshold. The initial waveform refers to the filling waveform corresponding to the condition that all the multiple filling waveforms are normal.

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

3. The method according to claim 1, wherein obtaining the preset attenuation value adjustment information includes:

Receive the preset attenuation value adjustment information from the optical network management device; or...

Retrieve preset attenuation value adjustment information from the storage module.

4. The method according to any one of claims 1 to 3, wherein the preset attenuation value adjustment information includes a preset attenuation value adjustment amount;

The step of 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;

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 determining that at least one of the multiple filling waveforms is abnormal includes:

Identify an anomaly in the filling wave source corresponding to the at least one filling wave.

7. The method according to claim 6, wherein determining the filling wave light source anomaly 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, the filling wave light source corresponding to the at least one filling wave is determined to be 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 of claim 8, wherein restoring the at least one filling waveform that was determined to be abnormal to normal comprises:

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 filling wave protection device, comprising a memory and a processor; the memory storing a computer program executable by the processor, wherein the computer program, when executed by the processor, implements the method of any one of claims 1 to 9.

11. A fill wave light source board, wherein the fill wave protection device as described in claim 10 is provided.

12. A system comprising at least one filling wave protection device as claimed in claim 10 or at least one filling wave light source board as claimed in claim 11.

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

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