Optical transmission power compensation method and device, network element device, electronic device, readable storage medium and computer program product

Abstract

The application discloses an optical transmission power compensation method and device, a network element device, electronic equipment, a readable storage medium and a computer program product, and belongs to the technical field of optical communication. The method comprises the following steps: acquiring the cross-section loss of each wave band in a target optical transmission section (OTS), wherein the target OTS is any OTS in an optical transmission network; calculating the power compensation value of each wave band according to the cross-section loss of each wave band in the target OTS; and completing power compensation on the target OTS based on the power compensation value of each wave band.

Description

Technical Field

[0001] This application relates to the field of optical communication, and in particular to an optical transmission power compensation method, apparatus, network element equipment, electronic equipment, readable storage medium, and computer program product. Background Technology

[0002] With the rapid growth of data traffic in networks, the demand for network transmission capacity is also increasing. Band extension is the most direct and effective way to improve the transmission capacity of a single fiber; for example, extending the C-band to the C+L band can double the total available bandwidth. However, with the increase in total bandwidth, the influence of stimulated Raman scattering (SRS) increases dramatically. This means that after transmission across fiber segments, energy from short wavelengths will transfer to long wavelengths. When there are changes in the wavelength range along the optical path, the energy transfer caused by the SRS effect will also change accordingly. After accumulation across multiple segments, this can lead to a sharp deterioration in power flatness and transmission performance, and in severe cases, even interruption of online services. Therefore, a dynamic power compensation method is needed to improve the stability of signal transmission in C+L band optical transmission systems.

[0003] Currently known dynamic compensation methods in the industry mainly rely on the channel power detection function of optical performance monitors (OPM). However, OPM has two limitations: 1. High cost: It is generally deployed in key nodes such as Optical Terminal Multiplexing (OTM) / Reconfigurable Optical Add / Drop Multiplexing (ROADM) and not in Optical Line Amplifier (OLA) sites. Therefore, it can only detect the power flatness change of an entire OMS segment and cannot detect the power flatness change of each Optical Transmission Section (OTS) within the OMS segment. This leads to the inability to accurately compensate for the SRS effect of each OTS, resulting in performance that cannot reach the optimal level, and even situations where the adjustment cannot converge to the target value; 2. Low efficiency: OPM is usually multiplexed in multiple directions. When there are adjustment needs in multiple directions in the network at the same time, the channel power detection efficiency of OPM will become very low due to the conflict of multi-directional calls, which seriously limits the network's concurrent response speed and may even cause some online services to be interrupted due to the inability to be optimized in time. Summary of the Invention

[0004] This application provides an optical transmission power compensation method, apparatus, network element device, electronic device, readable storage medium, and computer program product, which can solve the problem in related technologies that can only detect the power flatness change of an entire OMS segment, but cannot perceive the power flatness change of each OTS within the OMS segment, thus leading to the inability to accurately compensate for the SRS effect of each OTS and the inability to achieve optimal performance.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: Firstly, an optical transmission power compensation method is provided, comprising: Obtain the cross-segment loss of each band at the target optical transmission segment (OTS), wherein the target OTS is any OTS in the optical transmission network; Calculate the power compensation value for each band based on the cross-band loss of each band at the target OTS; Power compensation for the target OTS is completed based on the power compensation values ​​of each band.

[0006] Secondly, an optical transmission power compensation device is provided, the power compensation device being deployed in each optical transmission segment (OTS), comprising: A cross-band loss monitor is used to obtain the cross-band loss of each band at a target OTS, wherein the target OTS is any OTS in the optical transmission network; The controller is used to calculate the power compensation value of each band based on the cross-band loss of each band at the target OTS. A power compensator is used to perform power compensation on the target OTS based on the power compensation values ​​of each band.

[0007] Thirdly, a network element device is provided, including: the optical transmission power compensation device as described above.

[0008] Fourthly, an electronic device is provided, comprising a processor and a memory, the memory storing at least one computer program, the at least one computer program being loaded and executed by the processor to implement the above-described optical transmission power compensation method.

[0009] Fifthly, a readable storage medium is provided, wherein at least one computer program is stored in the readable storage medium, the computer program being loaded and executed by a processor to implement the above-described optical transmission power compensation method.

[0010] In a sixth aspect, a computer program product is provided, the computer program product comprising at least one computer program, the computer program being loaded and executed by a processor to implement the optical transmission power compensation method provided in the various optional implementations described above.

[0011] The optical transmission power compensation method, apparatus, network element equipment, electronic equipment, readable storage medium, and computer program products provided in this application embodiment can obtain the power flatness change of each OTS within the OMS segment, and thus accurately compensate for the SRS effect of each OTS. It does not require detection of channel power, is highly efficient and low-cost, and has better performance.

[0012] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0014] Figure 1 This diagram illustrates a multiplexing segment in a prior art C+L multi-band optical transmission system. Figure 2 A schematic diagram of the structure of an optical transmission power compensation device provided in an exemplary embodiment of this application is shown; Figure 3 A flowchart of an exemplary embodiment of the present application for optical transmission power compensation method is shown. Figure 4 This is a structural block diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0015] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0016] Figure 1 This is a schematic diagram of an optical multiplex section (OMS) in a typical C+L multi-band optical transmission system. Figure 1As shown, an OMS contains multiple OTSs. The OPM is deployed on the optical power amplifiers (OBAs) and optical amplifiers (OAs) of the Optical Terminal Multiplexing (OTM) / Reconfigurable Optical Add / Drop Multiplexing (ROADM). In the multiplexing segment, C-band and L-band signals pass through their respective wavelength selective switches (WSS) and enter their respective optical power amplifiers (OBAs) for amplification. After amplification, they are combined by a multiplexer and transmitted through the fiber optic span. At the next station, the C-band and L-band signals are separated by a demultiplexer and then amplified by their respective optical amplifiers (OAs) to compensate for transmission losses. This process repeats until the multiplexing segment OMS terminates.

[0017] In view of the above-mentioned OTM, an exemplary embodiment of this application provides an optical transmission power compensation device. Figure 2 A schematic diagram of an optical transmission power compensation device and its distribution provided in an exemplary embodiment of this application is shown. Figure 2 As shown, the optical transmission power compensation device is distributed across each individual OTS of the OMS. Each OTS is configured according to... Figure 2 The optical transmission power compensation device is deployed in the manner shown. This device can be configured in transmission network elements within an Optical Transport Network (OTN). These transmission network elements may include, but are not limited to, the optical line terminal (OLT), optical network terminal (ONT), optical network unit (ONU), and optical line amplifier (OLA) sites that constitute each independent OTS.

[0018] like Figure 2 As shown, the optical transmission power compensation device 10 includes: a cross-loss monitor 100, a controller 200, and a power compensator 300. In some embodiments, the cross-loss monitor 100 is used to acquire the cross-loss of each band at the target OTS and provide it to the controller 200; the controller 200 is used to calculate the power compensation value of each band based on the cross-loss of each band at the target OTS and send it to the power compensator 300; the power compensator 300 is used to complete the power compensation of the target OTS based on the power compensation value of each band, and the compensation method includes adjustment of absolute power and gain slope, etc.

[0019] Based on the aforementioned optical transmission power compensation device 10, the optical transmission power compensation method provided in this application is described below: Figure 3 A flowchart illustrating an exemplary embodiment of this application is shown, demonstrating an optical transmission power compensation method that can be executed by the aforementioned optical transmission power compensation device. Figure 3 As shown, the optical transmission power compensation method mainly includes the following steps (S310-S330): S310, obtain the cross-band loss of each band at the target OTS; In this embodiment, the target OTS is any OTS in the optical transmission network. This embodiment uses the target OTS as an example to introduce the method. For each OTS distributed across the OMS, power compensation is performed using the same optical transmission power compensation method as for the target OTS. Those skilled in the art will understand that the method described in this application using the target OTS as an example is merely illustrative and does not limit the scope of protection of the corresponding claims.

[0020] In some embodiments, obtaining the cross-band loss of each band in the target OTS includes: the first cross-band loss of the C-band in the target OTS and the second cross-band loss of the L-band in the target OTS.

[0021] In some embodiments, obtaining the cross-band loss of each band at the target OTS includes: obtaining the first total output power of the upstream C-band OA of the target OTS; obtaining the second total output power of the upstream L-band OA of the target OTS; obtaining the first total input power of the downstream C-band OA of the target OTS; obtaining the second total input power of the downstream L-band OA of the target OTS; using the difference between the first total output power and the first total input power as the first cross-band loss of the C-band at the target OTS; and using the difference between the second total output power and the second total input power as the second cross-band loss of the L-band at the target OTS.

[0022] In one application example, the cross-band loss of C-band and L-band within the current OTS is collected, and the total output power of C-band OA and L-band OA upstream of the current OTS is denoted as follows: and (Unit: dBm) Let the total input power of the current OTS downstream C-band OA and L-band OA be respectively... and (Unit: dBm), the cross-band losses for C-band and L-band are respectively and (Unit: dB), the cross-band loss between C-band and L-band is calculated using the following formulas (1) and (2):

[0023]

[0024] In the above embodiments, the optical transmission power compensation device is distributed and deployed on each independent OTS in the optical transmission network. For each independent OTS, the cross-segment loss of each band in the target OTS is obtained in the manner described above. This allows for the acquisition of the power flatness variation of each OTS within the OMS segment, thereby accurately compensating for the SRS effect of each OTS. Furthermore, in this embodiment, only the total input / output power of the upstream and downstream C-band OA and L-band OA of the current OTS needs to be detected, without needing to detect the channel power, resulting in a simple implementation, high efficiency, and low detection cost.

[0025] S320, calculates the power compensation value for each band based on the cross-band loss of each band at the target OTS; In some embodiments, the power compensation values ​​for each band include: absolute power compensation values ​​and gain slope compensation values. The absolute power compensation value is used to compensate for the average cross-band loss of the signal in each band, and the power slope compensation value is used to compensate for the fiber SRS effect within the OTS and the wavelength-dependent loss introduced by the inherent optical path loss.

[0026] Based on the above description, the power compensation value for each band is calculated according to the cross-band loss at the target OTS, including the following steps: a1. Calculate the absolute power compensation value for each band based on the cross-band loss at the target OTS. a2. Calculate the gain slope compensation value for each band based on the cross-band loss at the target OTS. The implementation method of step a1 above will be described below. In step a1, the absolute power compensation value of each band is calculated based on the cross-band loss of each band at the target OTS, including the following steps: b1. The difference between the first segment loss of the C-band target OTS and the preset reference value of the C-band absolute power is used as the absolute power compensation value of the C-band. b2. The difference between the second span loss of the L-band target OTS and the preset reference value of the absolute power of the L-band is used as the absolute power compensation value of the C-band.

[0027] In some embodiments, the absolute power compensation values ​​for the C-band and L-band are calculated in two ways: one is based on the current gain setting, and the other is based on a reference span loss. Specifically, in step b1, using the former method, the preset reference value for the C-band absolute power includes the current OA gain of the C-band downstream of the target OTS. Using the latter method, the preset reference value for the C-band absolute power includes the difference between the first span loss of the C-band downstream of the target OTS and the reference span loss of the C-band downstream of the target OTS. In step b2, using the former method, the preset reference value for the L-band absolute power includes the current OA gain of the L-band downstream of the target OTS. Using the latter method, the preset reference value for the L-band absolute power includes the difference between the first span loss of the L-band downstream of the target OTS and the reference span loss of the L-band downstream of the target OTS.

[0028] In one application example, the absolute power compensation value is calculated based on the current gain setting. The absolute power compensation values ​​for the C-band and L-band are respectively... and (Unit: dB), calculated using the following formulas (3) and (4):

[0029]

[0030] in, and These are the current OA gains for the C-band and L-band downstream of the current OTS, respectively, typically 15-30dB. and The first segment loss of the C-band target OTS and the second segment loss of the L-band target OTS are calculated above.

[0031] In another application example, the power compensation value is calculated based on the reference span loss, showing the absolute power compensation values ​​for both C-band and L-band. and The following formulas (5) and (6) are used to calculate:

[0032]

[0033] in, and The loss is the first segment loss of the C-band at the target OTS and the second segment loss of the L-band at the target OTS. and These are the reference cross-band losses for the given target OTS C-band and L-band, respectively.

[0034] The implementation method of step a2 above will be described below. Step a2 involves calculating the gain slope compensation value for each band based on the cross-band loss at the target OTS, including the following steps: c1. After normalizing the bandwidth of the difference between the second and first segment losses, the normalized C-band loss difference is obtained. The difference between the normalized C-band loss difference and the preset reference value of the C-band gain slope is used as the C-band gain slope compensation value. c2. After normalizing the bandwidth of the difference between the second and first segment losses, the normalized L-band loss difference is obtained. The difference between the normalized L-band loss difference and the preset reference value of the L-band gain slope is used as the L-band gain slope compensation value. In some embodiments, the gain slope compensation values ​​for the C-band and L-band are calculated in two ways: one is based on the current gain setting, and the other is based on the reference span loss. Specifically, in step c1, using the former method, the preset reference value for the C-band gain slope includes: the currently set gain slope of the OA in the C-band downstream of the target OTS. Using the latter method, the preset reference value for the C-band gain slope includes: the C-band normalized reference span loss difference obtained by normalizing the bandwidth of the reference span loss difference between the second and first reference span losses. In step c2, using the former method, the preset reference value for the L-band gain slope includes: the currently set gain slope of the OA in the L-band downstream of the target OTS. Using the latter method, the preset reference value for the L-band gain slope includes: the L-band normalized reference span loss difference obtained by normalizing the bandwidth of the reference span loss difference between the second and first reference span losses. In this embodiment, the first reference span loss is the reference span loss of the C-band at the target OTS, and the second reference span loss is the reference span loss of the L-band at the target OTS.

[0035] In practical implementation, step a2 can calculate the gain slope compensation value for each band based on the cross-band loss of each band at the target OTS in the following way: In one application example, the gain slope compensation value is calculated based on the current gain setting. The gain slope compensation values ​​for C-band and L-band are respectively... and (Unit: dB), calculated using the following formulas (7) and (8):

[0036]

[0037] in, and These are the current OA gain slopes in the C-band and L-band downstream of the target OTS, respectively. and These represent the first span loss of the C-band at the target OTS and the second span loss of the L-band at the target OTS, respectively. and These are the frequencies of the longest and shortest wavelengths in the C-band, respectively (unit: Hz). and These are the frequencies of the longest and shortest wavelengths in the L-band, respectively. and These are the center wavelength frequencies (in Hz) of the entire C-band and L-band, respectively.

[0038] Alternatively, in another application example, the gain slope compensation value is calculated based on a reference cross-band loss, with gain slope compensation values ​​for both C-band and L-band. and The following formulas (9) and (10) are used to calculate:

[0039]

[0040] in, and These are the current OA gain slopes in the C-band and L-band downstream of the target OTS, respectively. and These represent the first span loss of the C-band at the target OTS and the second span loss of the L-band at the target OTS, respectively. and These are the reference span loss for C-band at the target OTS and the reference span loss for L-band at the target OTS, respectively. and These are the frequencies of the longest and shortest wavelengths in the C-band, respectively (unit: Hz). and These are the frequencies of the longest and shortest wavelengths in the L-band, respectively. and These are the center wavelength frequencies (in Hz) of the entire C-band and L-band, respectively.

[0041] In the above embodiments, the optical transmission power compensation device is distributed and deployed on each independent OTS in the optical transmission network. For each independent OTS, the power compensation value for each band is calculated in the above manner, thereby accurately compensating for the SRS effect of each OTS. In addition, in this embodiment, it is only necessary to detect the total input / output power of the upstream and downstream C-band OA and L-band OA of the current OTS, without detecting the channel power. Each OTS segment can independently and in parallel complete the SRS effect compensation, which is more efficient.

[0042] In some embodiments, the method provided in this embodiment can also achieve automatic power compensation. Before calculating the power compensation value for each band based on the cross-band loss of each band at the target OTS in step S320, the method provided in this embodiment further includes: The cross-band loss of each band at the target OTS is compared with a first preset trigger threshold, and the cross-band loss of each band at the target OTS is greater than or equal to the first preset trigger threshold; or, The difference between the cross-band loss of each band at the target OTS and the initial cross-band loss is compared with the second preset trigger threshold, and the difference between the cross-band loss of each band at the target OTS and the initial cross-band loss is greater than or equal to the second preset trigger threshold.

[0043] In this embodiment, the cross-loss monitor 100 is also used to periodically refresh the cross-loss and determine whether events such as the absolute value of cross-loss exceeding the limit or the change in cross-loss exceeding the limit have occurred. That is, if the cross-segment loss of each band at the target OTS exceeds the first preset trigger threshold, a cross-loss absolute value exceeding the limit event occurs; if the difference between the cross-segment loss of each band at the target OTS and the initial cross-segment loss exceeds the second preset trigger threshold, a cross-loss change exceeding the limit event occurs. When the cross-loss monitor 100 detects the above events, it immediately reports the cross-loss absolute value exceeding the limit and the change exceeding the limit alarm to the controller 200, which is used to trigger the controller 200 to complete automatic power compensation (i.e., trigger the controller 200 to execute the compensation process of steps S320-S330), to avoid a sharp deterioration in the power performance of the OTS, and to ensure that when the link is abnormal, the power of the online service wavelength will not change drastically and thus cause bit errors.

[0044] S330 performs power compensation for the target OTS based on the power compensation values ​​for each band.

[0045] The implementation method of step S330 described above will be explained below.

[0046] In step S330, power compensation for the target OTS is completed based on the power compensation values ​​of each band, including: (1) absolute power compensation for the target OTS, or (2) gain slope compensation for the target OTS.

[0047] (1) Absolute power compensation for the target OTS, including: The sum of the absolute power compensation value of each band and the adjustment amount of the pre-VOA is used as the gain adjustment amount of each band; based on the gain adjustment amount of each band, the absolute power compensation of the target OTS is completed by adjusting the gain of the pre-VOA and the OA downstream of the target OTS.

[0048] In practice, typically downstream of the OTS, absolute power regulation can be achieved by controlling the VOA or OA pump current based on the gain adjustment amount.

[0049] In one application example, absolute power compensation is achieved through the pre-VOA of the downstream OA of the OTS and the gain adjustment of the OA. The adjustment amount of the pre-VOA is denoted as... (Unit: dB), the gain adjustment amounts for C-band and L-band OA are respectively and (Unit: dB), calculated using the following formulas (11) and (12):

[0050]

[0051] After adjustment, the OA gain settings for the downstream C-band and L-band of the OTS are as follows:

[0052]

[0053] (2) Gain slope compensation for the target OTS, including: Based on the gain slope compensation values ​​of each band, the gain slope compensation of the target OTS is completed by adjusting the gain slope of the downstream OA of the target OTS.

[0054] In practice, power slope adjustment can be achieved by controlling the gain slope of the OA, either upstream or downstream of the OTS. For EDFA, a common way to control the gain slope is to adjust the attenuation of the built-in VOA, or it can be achieved through the built-in filtering device for power equalization.

[0055] In one application example, power slope compensation is achieved by adjusting the gain slope of the downstream OA of the OTS. The gain slope adjustment amounts for the C-band and L-band OA are respectively... and (Unit: dB) After adjustment, the OA gain slope settings for the downstream C-band and L-band of the OTS are as follows:

[0056]

[0057] In this embodiment, the SRS effect of each OTS segment can be accurately compensated, resulting in better performance.

[0058] The embodiments of this application will be further described in detail below, based on different operational phases of the C+L band transmission system, in conjunction with the accompanying drawings and examples. These embodiments are only used to explain the present invention and do not constitute a limitation thereof.

[0059] 1. Power adjustment during the initial stage In the initial phase of a C+L band transmission system, a filler wave is typically used to replace the actual service wave to adjust the system power. After the filler wave light source is activated, and each OMS segment adjusts the total output power of the OBA optical power amplifiers in both the C-band and L-band to the target output, the system can then be activated. Figure 3 The compensation process of the optical transmission power compensation method provided in this embodiment, as shown, enables the dynamic power compensation function of each OTS in the OMS segment that has completed the OBA target output adjustment. The dynamic power compensation device of each OTS will complete the initialization settings of the pre-VOA, gain, and gain slope of the downstream OA of the target OTS according to the optical transmission power compensation method described above. Since it is an initialization adjustment, when the reference cross-segment loss is not yet clear, the power compensation value can be calculated according to the current gain setting. After the initialization settings are completed, the optical transmission power compensation method will still be used for N-1 iterations (the total number of iterations N does not exceed the total number of OTS in the current OMS segment). After the iteration is completed, the power adjustment of the OMS segment and OTS in the initial stage is completed. It is only necessary to adjust the attenuation of the wavelength selection switch of the WSS at the transmitting end of the OMS segment to control the single-channel power at the beginning and end of the OMS segment to reach the target value, thereby completing the power adjustment of the entire initial stage of the C+L band transmission system.

[0060] 2. Power adjustment during dynamic wavelength scheduling in the operation and maintenance phase During the operation and maintenance phase of a C+L band transmission system, dynamic scheduling of service wavelengths will cause an increase or decrease in the number of wavelengths in the corresponding OMS segment. This alters the power transfer caused by the SRS effect in each OTS within the OMS segment, leading to changes in the cross-segment loss between the C and L bands. When the change in cross-segment loss between the C and L bands, or the cross-segment loss difference between the C and L bands, exceeds a set threshold (i.e., an event occurs where the absolute value of the cross-segment loss exceeds the limit or the amount of cross-segment loss change exceeds the limit), the optical transmission power compensation device of the corresponding OTS is triggered to compensate for the absolute power and gain slope after the SRS effect change using the aforementioned optical transmission power compensation method. This ensures that the power of online service wavelengths does not change drastically during dynamic service scheduling, thus preventing bit errors. Since the power adjustment during the system's initial commissioning phase is already completed during the operation and maintenance phase, the power compensation value can be calculated based on the reference cross-segment loss. The reference cross-segment loss for the C and L bands can be taken as the cross-segment loss of the C and L bands after the initial commissioning adjustment, using the stable state after adjustment as a reference.

[0061] 3. Power regulation during link anomalies during operation and maintenance phase During the operation and maintenance phase of a C+L band transmission system, abnormal wavelength drops can cause changes in the number of wavelengths in the corresponding OMS segment. Fiber aging, bending, compression, or splicing can lead to link attenuation degradation. These factors can alter the power transfer caused by the corresponding OTS SRS effect, thereby changing the cross-segment loss in the C and L bands. When the change in cross-segment loss in the C band, L band, or the difference between the C and L bands in relative steady state exceeds a set threshold (i.e., an event occurs where the absolute value of cross-segment loss exceeds the limit or the amount of cross-segment loss change exceeds the limit), the optical transmission power compensation device of the corresponding OTS is triggered to compensate for the absolute power and gain slope after the SRS effect change according to the aforementioned optical transmission power compensation method. This ensures that when the link is abnormal, the power of online service wavelengths will not change drastically, thus preventing bit errors. Since the power adjustment during the system's initial commissioning phase has been completed during the operation and maintenance phase, the power compensation value can be calculated based on the reference cross-segment loss. The reference cross-segment loss for the C and L bands can be taken as the cross-segment loss of the C and L bands after the initial commissioning adjustment, using the stable state after adjustment as a reference.

[0062] In summary, the optical transmission power compensation method provided in this embodiment can obtain the power flatness variation of each OTS within the OMS segment, thereby accurately compensating for the SRS effect of each OTS. It eliminates the need to detect channel power, offering high efficiency, low cost, and superior performance. Furthermore, it can automatically trigger the compensation process after events such as exceeding the limit for absolute cross-loss or exceeding the limit for cross-loss variation, completing the compensation of absolute power and gain slope after the SRS effect change. This ensures that when link anomalies occur, the power of online service wavelengths will not change drastically, thus preventing bit errors.

[0063] An exemplary embodiment of this application provides an optical transmission power compensation device 10. For example... Figure 2 As shown, the aforementioned optical transmission power compensation devices are distributed and deployed on each independent OTS of the C+L multi-band optical transmission system, enabling the following: Figure 3 The embodiments shown include all or part of the content. The following is only a brief description of the structure and function of the optical transmission power compensation device; for other matters not covered herein, please refer to the relevant descriptions in the aforementioned optical transmission power compensation method. The embodiments of this optical transmission power compensation device correspond to the embodiments of the aforementioned optical transmission power compensation method. All implementation processes and methods of the aforementioned method embodiments can be applied to the embodiments of this optical transmission power compensation device and achieve the same technical effects.

[0064] like Figure 2As shown, the optical transmission power compensation device includes: a cross-segment loss monitor 100, a controller 200, and a power compensator 300. In some embodiments, the cross-segment loss monitor 100 is used to acquire the cross-segment loss of each band in the target optical transmission segment (OTS) and provide it to the controller 200, wherein the target OTS is any OTS in the optical transmission network; the controller 200 is used to calculate the power compensation value of each band based on the cross-segment loss of each band in the target OTS and send it to the power compensator 300; the power compensator 300 is used to complete the power compensation of the target OTS based on the power compensation value of each band.

[0065] In some embodiments, the cross-band loss of each band in the target OTS acquired by the cross-band loss monitor 100 includes: the first cross-band loss of the C-band in the target OTS and the second cross-band loss of the L-band in the target OTS. In some embodiments, the cross-band loss monitor 100 obtains the cross-band loss of each band in the target OTS in the following manner: obtaining the first total output power of the C-band OA upstream of the target OTS; obtaining the second total output power of the L-band OA upstream of the target OTS; obtaining the first total input power of the C-band OA downstream of the target OTS; obtaining the second total input power of the L-band OA downstream of the target OTS; taking the difference between the first total output power and the first total input power as the first cross-band loss of the C-band in the target OTS; and taking the difference between the second total output power and the second total input power as the second cross-band loss of the L-band in the target OTS.

[0066] In the above embodiments, the optical transmission power compensation device is distributed and deployed on each independent OTS in the optical transmission network. For each independent OTS, the cross-segment loss of each band in the target OTS is obtained in the manner described above. This allows for the acquisition of the power flatness variation of each OTS within the OMS segment, thereby accurately compensating for the SRS effect of each OTS. Furthermore, in this embodiment, only the total input / output power of the upstream and downstream C-band OA and L-band OA of the current OTS needs to be detected, without needing to detect the channel power, resulting in a simple implementation, high efficiency, and low detection cost.

[0067] In some embodiments, the power compensation values ​​for each band include: absolute power compensation values ​​and gain slope compensation values. The absolute power compensation value is used to compensate for the average cross-band loss of the signal in each band, and the power slope compensation value is used to compensate for the fiber SRS effect within the OTS and the wavelength-dependent loss introduced by the inherent optical path loss.

[0068] Based on the above description, the controller 200 calculates the power compensation value for each band according to the cross-band loss of each band at the target OTS through the following steps: a1. Calculate the absolute power compensation value for each band based on the cross-band loss at the target OTS. a2. Calculate the gain slope compensation value for each band based on the cross-band loss at the target OTS. The implementation method of step a1 above will be described below. The controller 200 calculates the absolute power compensation value for each band based on the cross-band loss at the target OTS using the following steps: b1. The difference between the first segment loss of the C-band target OTS and the preset reference value of the C-band absolute power is used as the absolute power compensation value of the C-band. b2. The difference between the second span loss of the L-band target OTS and the preset reference value of the absolute power of the L-band is used as the absolute power compensation value of the C-band.

[0069] In some embodiments, the absolute power compensation values ​​for the C-band and L-band are calculated in two ways: one is based on the current gain setting, and the other is based on a reference span loss. Specifically, in step b1, using the former method, the preset reference value for the C-band absolute power includes the current OA gain of the C-band downstream of the target OTS. Using the latter method, the preset reference value for the C-band absolute power includes the difference between the first span loss of the C-band downstream of the target OTS and the reference span loss of the C-band downstream of the target OTS. In step b2, using the former method, the preset reference value for the L-band absolute power includes the current OA gain of the L-band downstream of the target OTS. Using the latter method, the preset reference value for the L-band absolute power includes the difference between the first span loss of the L-band downstream of the target OTS and the reference span loss of the L-band downstream of the target OTS.

[0070] The implementation method of step a2 above will be described below. The controller 200 calculates the gain slope compensation value for each band based on the cross-band loss at the target OTS using the following steps: c1. After normalizing the bandwidth of the difference between the second and first segment losses, the normalized C-band loss difference is obtained. The difference between the normalized C-band loss difference and the preset reference value of the C-band gain slope is used as the C-band gain slope compensation value. c2. After normalizing the bandwidth of the difference between the second and first segment losses, the normalized L-band loss difference is obtained. The difference between the normalized L-band loss difference and the preset reference value of the L-band gain slope is used as the L-band gain slope compensation value. In some embodiments, the gain slope compensation values ​​for the C-band and L-band are calculated in two ways: one is based on the current gain setting, and the other is based on the reference span loss. Specifically, in step c1, using the former method, the preset reference value for the C-band gain slope includes: the currently set gain slope of the OA in the C-band downstream of the target OTS. Using the latter method, the preset reference value for the C-band gain slope includes: the C-band normalized reference span loss difference obtained by normalizing the bandwidth of the reference span loss difference between the second and first reference span losses. In step c2, using the former method, the preset reference value for the L-band gain slope includes: the currently set gain slope of the OA in the L-band downstream of the target OTS. Using the latter method, the preset reference value for the L-band gain slope includes: the L-band normalized reference span loss difference obtained by normalizing the bandwidth of the reference span loss difference between the second and first reference span losses. In this embodiment, the first reference span loss is the reference span loss of the C-band at the target OTS, and the second reference span loss is the reference span loss of the L-band at the target OTS.

[0071] In some embodiments, the optical transmission power compensation device provided in this embodiment can also realize automatic power compensation. The cross-segment loss monitor 100 is further configured to compare the cross-segment loss of each band at the target OTS with a first preset trigger threshold, and the cross-segment loss of each band at the target OTS is greater than or equal to the first preset trigger threshold; or, compare the difference between the cross-segment loss of each band at the target OTS and the initial cross-segment loss with a second preset trigger threshold, and the difference between the cross-segment loss of each band at the target OTS and the initial cross-segment loss is greater than or equal to the second preset trigger threshold.

[0072] In this embodiment, when the cross-loss monitor 100 detects the above-mentioned event, it immediately reports events such as cross-loss absolute value exceeding the limit and change exceeding the limit to the controller 200, which are used to trigger the controller 200 to complete automatic power compensation (i.e., trigger the controller 200 to execute the compensation process of steps S320-S330) to avoid the rapid deterioration of OTS power performance.

[0073] In some embodiments, the power compensator 300 performs power compensation on the target OTS based on the power compensation value of each band in the following ways: (1) absolute power compensation on the target OTS, or (2) gain slope compensation on the target OTS.

[0074] (1) The power compensator 300 compensates for the absolute power of the target OTS in the following manner: The sum of the absolute power compensation value of each band and the adjustment amount of the pre-VOA is used as the gain adjustment amount of each band; based on the gain adjustment amount of each band, the absolute power compensation of the target OTS is completed by adjusting the gain of the pre-VOA and the OA downstream of the target OTS.

[0075] In practice, typically downstream of the OTS, absolute power regulation can be achieved by controlling the VOA or OA pump current based on the gain adjustment amount.

[0076] (2) The power compensator 300 compensates for the gain slope of the target OTS in the following manner: Based on the gain slope compensation values ​​of each band, the gain slope compensation of the target OTS is completed by adjusting the gain slope of the downstream OA of the target OTS.

[0077] In practice, power slope adjustment can be achieved by controlling the gain slope of the OA, either upstream or downstream of the OTS. For EDFA, a common way to control the gain slope is to adjust the attenuation of the built-in VOA, or it can be achieved through the built-in filtering device for power equalization.

[0078] The optical transmission power compensation device provided in this application embodiment can achieve... Figure 3 To avoid repetition, the various processes implemented in the method embodiments will not be described again in the corresponding application examples. Please refer to the description in the method embodiments for details.

[0079] In summary, the optical transmission power compensation device provided in this embodiment, deployed on each independent OTS in the optical transmission network, can acquire the power flatness variation of each OTS within the OMS segment, thereby accurately compensating for the SRS effect of each OTS. This approach is highly efficient, low-cost, and achieves optimal performance. Furthermore, it can automatically trigger the compensation process after events such as exceeding the limit for absolute cross-loss or exceeding the limit for cross-loss variation, completing the compensation of the absolute power and gain slope after the SRS effect change. This ensures that when link anomalies occur, the power of online service wavelengths will not change drastically, thus preventing bit errors.

[0080] Figure 4 A structural block diagram of an electronic device 1000 illustrating an exemplary embodiment of this application is shown. The electronic device 1000 can be implemented as the aforementioned optical transmission power compensation device, which can be configured in electronic devices such as smartphones, tablets, laptops, desktop computers, smartwatches, televisions, or servers.

[0081] Typically, electronic device 1000 includes a processor 1001 and a memory 1002.

[0082] Processor 1001 may include one or more processing cores, such as a quad-core processor, a deca-core processor, etc. Processor 1001 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 1001 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 1001 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 1001 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0083] The memory 1002 may include one or more computer-readable storage media, which may be non-transitory. The memory 1002 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 1002 is used to store at least one instruction, which is executed by the processor 1001 to implement all or part of the steps in the optical transmission power compensation method shown in the method embodiments of this application.

[0084] Those skilled in the art will understand that Figure 4 The structure shown does not constitute a limitation on the electronic device 1000, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0085] In one exemplary embodiment, a readable storage medium is also provided, which stores a program or instructions that, when executed by a processor, implement all or part of the steps in the optical transmission power compensation method described above. For example, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, a floppy disk, or an optical data storage device, etc.

[0086] In one exemplary embodiment, a computer program product is also provided, comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to perform the aforementioned... Figure 3 All or part of the steps of the optical transmission power compensation method embodiment shown.

[0087] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0088] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for compensating optical transmission power, characterized in that, include: Obtain the cross-segment loss of each band at the target optical transmission segment (OTS), wherein the target OTS is any OTS in the optical transmission network; Calculate the power compensation value for each band based on the cross-band loss of each band at the target OTS; Power compensation for the target OTS is completed based on the power compensation values ​​of each band.

2. The method according to claim 1, characterized in that, The cross-band loss of each band in the target OTS includes: the first cross-band loss of the C band in the target OTS and the second cross-band loss of the L band in the target OTS; The acquisition of cross-band loss for each band at the target OTS includes: Obtain the first total output power of the upstream C-segment optical amplifier OA of the target OTS; Obtain the second total output power of the upstream L segment OA of the target OTS; Obtain the first total input power of the downstream C-segment OA of the target OTS; Obtain the second total input power of the downstream L-segment OA of the target OTS; The difference between the first total output power and the first total input power is taken as the first cross-band loss of the C-band at the target OTS; The difference between the second total output power and the second total input power is taken as the second cross-band loss of the L-band at the target OTS.

3. The method according to claim 2, characterized in that, The power compensation values ​​for each band include: absolute power compensation value and gain slope compensation value; The calculation of the power compensation value for each band based on the cross-band loss at the target OTS includes: The absolute power compensation value for each band is calculated based on the cross-band loss at the target OTS. The gain slope compensation value for each band is calculated based on the cross-band loss of each band at the target OTS.

4. The method according to claim 3, characterized in that, The calculation of the gain slope compensation value for each band based on the cross-band loss at the target OTS includes: The bandwidth difference between the second and first segment losses is normalized to obtain the C-band normalized segment loss difference. The difference between the C-band normalized segment loss difference and the preset reference value for the C-band gain slope is used as the C-band gain slope compensation value; or... The bandwidth of the difference between the second and first segment losses is normalized to obtain the L-band normalized loss difference. The difference between the L-band normalized loss difference and the preset reference value of the L-band gain slope is used as the L-band gain slope compensation value. The preset reference value for the C-band gain slope includes: the current set gain slope of the OA of the C-band downstream of the target OTS, or the C-band normalized reference span loss difference obtained by normalizing the bandwidth of the reference span loss difference between the second reference span loss and the first reference span loss; the preset reference value for the L-band gain slope includes: the current set gain slope of the OA of the L-band downstream of the target OTS, or the L-band normalized reference span loss difference obtained by normalizing the bandwidth of the reference span loss difference between the second reference span loss and the first reference span loss; wherein the first reference span loss is the reference span loss of the C-band in the target OTS, and the second reference span loss is the reference span loss of the L-band in the target OTS.

5. The method according to claim 4, characterized in that, The gain slope compensation value for each band, calculated based on the cross-band loss at the target OTS, is obtained using the following formula: or, in, and These are the gain slope compensation values ​​for the C-band and L-band, respectively. and These are the current OA gain slopes of the C-band and L-band downstream of the target OTS, respectively. and These represent the first span loss of the C-band and the second span loss of the L-band in the target OTS, respectively. and These are the reference span loss for the C-band and the reference span loss for the L-band at the target OTS, respectively. and These are the frequencies of the longest and shortest wavelengths in the C-band, respectively. and These are the frequencies of the longest and shortest wavelengths in the L-band, respectively. and These are the center wavelength frequencies of the entire C-band and L-band, respectively.

6. The method according to claim 2, characterized in that, Before calculating the power compensation value for each band based on the cross-band loss of each band at the target OTS, the method further includes: The cross-band loss of each band at the target OTS is compared with a first preset trigger threshold, and the cross-band loss of each band at the target OTS is greater than or equal to the first preset trigger threshold; or... The difference between the cross-segment loss of each band at the target OTS and the initial cross-segment loss is compared with a second preset trigger threshold, and the difference between the cross-segment loss of each band at the target OTS and the initial cross-segment loss is greater than or equal to the second preset trigger threshold.

7. The method according to any one of claims 3 to 5, characterized in that, The power compensation for the target OTS based on the power compensation values ​​of each band includes: The sum of the absolute power compensation value of each band and the pre-VOA adjustment amount is used as the gain adjustment amount of each band; based on the gain adjustment amount of each band, the absolute power compensation of the target OTS is completed by adjusting the gain of the pre-VOA and OA of the downstream OA of the target OTS; or, Based on the gain slope compensation values ​​of each band, the gain slope compensation of the target OTS is completed by adjusting the gain slope of the downstream OA of the target OTS.

8. An optical transmission power compensation device, characterized in that, The power compensation device is deployed in each optical transport segment (OTS) and includes: A cross-band loss monitor is used to obtain the cross-band loss of each band at a target OTS, wherein the target OTS is any OTS in the optical transmission network; The controller is used to calculate the power compensation value of each band based on the cross-band loss of each band at the target OTS. A power compensator is used to perform power compensation on the target OTS based on the power compensation values ​​of each band.

9. The apparatus according to claim 8, characterized in that, The cross-band loss of each band in the target OTS includes: the first cross-band loss of the C band in the target OTS and the second cross-band loss of the L band in the target OTS; The cross-band loss monitor obtains the cross-band loss of each band at the target OTS in the following manner: Obtain the first total output power of the upstream C-segment optical amplifier OA of the target OTS; obtain the second total output power of the upstream L-segment OA of the target OTS; obtain the first total input power of the downstream C-segment OA of the target OTS; obtain the second total input power of the downstream L-segment OA of the target OTS; take the difference between the first total output power and the first total input power as the first cross-segment loss of the C-band in the target OTS; take the difference between the second total output power and the second total input power as the second cross-segment loss of the L-band in the target OTS.

10. A network element device, characterized in that, include: The optical transmission power compensation device as described in claim 8 or 9.

11. An electronic device, characterized in that, The electronic device includes a processor and a memory, the memory storing programs or instructions that can run on the processor, the programs or instructions being executed by the processor to implement the steps of the optical transmission power compensation method as described in any one of claims 1 to 7.

12. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the optical transmission power compensation method as described in any one of claims 1-7.

13. A computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the steps of the optical transmission power compensation method as claimed in any one of claims 1 to 7.

Images