Power adjustment method, broadband transmission system, terminal device, and storage medium

Abstract

The present application discloses a power adjustment method, a broadband transmission system, a terminal device, and a storage medium. The power adjustment method comprises: obtaining initial preset power of several amplifier groups; acquiring a power loss difference between a first waveband signal and a second waveband signal, and on the basis of the power loss difference, determining a target power adjustment amount corresponding to the initial preset power; monitoring a total spectral slope of input to transmission spans, and obtaining a total distribution slope of the several amplifier groups; on the basis of the total spectral slope and the total distribution slope, determining a target expected slope and a target slope adjustment amount corresponding to the target expected slope; when the target power adjustment amount does not satisfy a preset first threshold, adjusting output power of the several amplifier groups to compensate for the power loss difference, to perform iterative power adjustment; and when the target slope adjustment amount does not satisfy a preset second threshold, updating the target slope adjustment amount, to perform iterative slope adjustment.

Description

Power regulation method, broadband transmission system, terminal equipment and storage medium

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311285747.1 filed on October 7, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of optical communication technology, and in particular to a power regulation method, a broadband transmission system, a terminal device, and a storage medium. Background Art

[0004] Compared with the traditional C-band system, a notable feature of the multi-band broadband transmission system (C+L system) that includes C-band and L-band signals is the presence of a strong stimulated Raman scattering (SRS) effect.

[0005] On the one hand, the SRS effect causes power transfer from high-frequency or short-wave channels to low-frequency or long-wave channels. This power transfer significantly changes the signal power distribution in the two wavelength bands propagating along the optical fiber. This stimulated Raman scattering effect, combined with the wavelength-dependent loss of the optical fiber and the wavelength-dependent characteristics of the amplifier gain and noise spectrum, further exacerbates the performance imbalance between different wavelength division multiplexing channels, or the uneven optical signal-to-noise ratio (OSNR). This imbalance accumulates with increasing transmission distance, ultimately limiting the overall transmission distance of the optical link due to a bottleneck at the wavelength with the worst OSNR. On the other hand, the SRS effect is strongly correlated with the input fiber power. Changes in the input fiber power will also cause changes in the power transfer, leading to transmission performance imbalances in C+L multi-band broadband transmission systems.

[0006] Therefore, it is necessary to propose a solution to improve the transmission performance imbalance caused by the power transfer phenomenon in the C+L multi-band broadband transmission system.

[0007] Summary of the Invention

[0008] The main purpose of this application is to provide a power regulation method, a broadband transmission system, a terminal device and a storage medium, aiming to solve the technical problem of transmission performance imbalance caused by power transfer phenomenon in the C+L multi-band broadband transmission system.

[0009] To achieve the above objectives, the present application provides a power regulation method, which is applied to a broadband transmission system. The broadband transmission system includes a plurality of amplifier groups and transmission spans between adjacent amplifier groups. The plurality of amplifier groups are used to transmit first band signals and second band signals. The power regulation method includes the following steps:

[0010] obtaining initial preset powers of the plurality of amplifier groups;

[0011] Obtaining a power loss difference between the first band signal and the second band signal, and determining a target power adjustment amount corresponding to the initial preset power based on the power loss difference;

[0012] monitoring the total slope of the fiber-input spectrum of the transmission span and obtaining the total slope of the downlink signals of the plurality of amplifier groups;

[0013] Determining a target expected slope and a target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the delivered total slope;

[0014] When the target power adjustment amount does not meet the preset first threshold value, the output power of the multiple amplifier groups is adjusted to compensate for the power loss difference to perform power iterative adjustment, and when the target slope adjustment amount does not meet the preset second threshold value, the target slope adjustment amount is updated to perform slope iterative adjustment.

[0015] The embodiment of the present application further provides a broadband transmission system, comprising a plurality of amplifier groups and transmission spans between adjacent amplifier groups, wherein each line amplifier group in the plurality of amplifier groups is configured with at least one sideband filtering module;

[0016] The plurality of amplifier groups are used to transmit first band signals and second band signals;

[0017] The sideband filtering module is used to monitor the total slope of the fiber input spectrum of the transmission span;

[0018] The broadband transmission system is used to obtain the initial preset power of the multiple amplifier groups; obtain the power loss difference between the first band and the second band signals, and determine the target power adjustment amount corresponding to the initial preset power based on the power loss difference; obtain the total downward slope corresponding to each of the multiple amplifier groups; determine the target expected slope and the target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total downward slope; when the target power adjustment amount does not meet the preset first threshold value, adjust the output power of the multiple amplifier groups to compensate for the power loss difference to perform power iterative adjustment; and when the target slope adjustment amount does not meet the preset second threshold value, update the target slope adjustment amount to perform slope iterative adjustment.

[0019] An embodiment of the present application also proposes a terminal device, which includes a memory, a processor, and a power regulation program stored in the memory and runnable on the processor. When the power regulation program is executed by the processor, the steps of the power regulation method described above are implemented.

[0020] An embodiment of the present application further provides a computer-readable storage medium, on which a power regulation program is stored. When the power regulation program is executed by a processor, the steps of the power regulation method described above are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a flow chart of a first exemplary embodiment of a power regulation method of the present application;

[0022] FIG2 is a schematic diagram of monitoring and adjusting the power optimization algorithm of the broadband transmission system in the power regulation method of the present application;

[0023] FIG3 is a flow chart of a second exemplary embodiment of a power regulation method of the present application;

[0024] FIG4 is a flow chart of a third exemplary embodiment of a power regulation method of the present application;

[0025] FIG5 is a flow chart of a fourth exemplary embodiment of a power regulation method of the present application;

[0026] FIG6 is a flow chart of a fifth exemplary embodiment of a power regulation method of the present application;

[0027] FIG7 is a flow chart of a sixth exemplary embodiment of a power regulation method of the present application;

[0028] FIG8 is a schematic diagram of a sideband filter device design for the power regulation method of the present application;

[0029] FIG9 is a flow chart of a seventh exemplary embodiment of a power regulation method of the present application;

[0030] FIG10 is a flow chart of an eighth exemplary embodiment of a power regulation method of the present application;

[0031] FIG11 is a schematic diagram of the structure of a terminal device provided by the ninth exemplary embodiment of the power regulation method of the present application.

[0032] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0034] The main solution of the embodiment of the present application is: obtaining the initial preset power of the several amplifier groups; obtaining the power loss difference between the first band signal and the second band signal, and determining the target power adjustment amount corresponding to the initial preset power based on the power loss difference; monitoring the total slope of the fiber-input spectrum of the transmission span and obtaining the total downward slope of the several amplifier groups; determining the target expected slope and the target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total downward slope; when the target power adjustment amount does not meet the preset first threshold value, compensating for the power loss difference to perform power iterative adjustment, and when the target slope adjustment amount does not meet the preset second threshold value, updating the target slope adjustment amount to perform slope iterative adjustment.

[0035] Based on the solution of the present application, by introducing spectral slope monitoring points in each amplifier group in the C+L multi-band broadband transmission system, targeted matching compensation of the SRS effects of each cross-segment in the engineering link is achieved, thereby achieving the purpose of improving power flatness; in addition, since the SRS effect causes changes in power transfer, continuous iterative power adjustment is used to converge to the ideal state, which can effectively improve the technical problem of imbalance in transmission performance caused by the power transfer phenomenon in the C+L multi-band broadband transmission system, and further optimize the transmission performance of the C+L multi-band broadband transmission system.

[0036] The embodiments of the present application take into account the necessity of power optimization algorithms in C+L multi-band broadband transmission systems, which are mainly reflected in two aspects. First, the power transfer caused by the Raman nonlinear effect inherent in the C+L system will cause serious imbalance in signal transmission performance; second, the optical network has an increasingly strong demand for intelligent operation and maintenance.

[0037] Specifically, compared to traditional C-band systems, a notable feature of C+L systems is the presence of a strong stimulated Raman scattering effect. This causes power transfer from high-frequency or short-wavelength channels to low-frequency or long-wavelength channels. This power transfer significantly changes the signal power distribution in the two bands propagating along the optical fiber. This effect, combined with the wavelength-dependent loss of the optical fiber and the wavelength-dependent characteristics of the amplifier gain and noise spectrum, further exacerbates the performance imbalance between different wavelength division multiplexing channels, or OSNR unevenness. This imbalance accumulates with increasing transmission distance, ultimately limiting the overall transmission distance of the optical link due to a bottleneck at the wavelength with the worst OSNR.

[0038] Secondly, due to operators' growing demand for intelligent optical network operations and maintenance (O&M), power optimization algorithms have become essential adjustment tools for optical transmission systems. It's now widely recognized that C-band optical transmission requires a comprehensive power optimization algorithm. Existing C-band power optimization algorithms must automatically adjust power for both multiplex section and channel-level services end-to-end, automatically adjust service add / drop power, and automatically maintain power during optical path degradation during site deployment, capacity expansion, and O&M scenarios. However, the power optimization algorithm for C+L systems is more complex, requiring precise power adjustment to balance OSNR performance. The system must independently adjust the OA gain of the C and L bands to compensate for inter-band loss and inter-band power transfer. Furthermore, iteratively adjusts the OA slope of the C and L bands to compensate for spectral tilt caused by intra-band power transfer. Finally, WSS attenuation is required to precisely control the fiber power delivered to each channel. In these complex scenarios, manual adjustments are completely inadequate or simply cannot meet time constraints. Therefore, automated power optimization algorithms are even more valuable in C+L systems.

[0039] It is an industry consensus that C+L systems must have a power regulation algorithm. This algorithm is one of the keys to maintaining channel performance and service stability in C+L systems. The quality of the power regulation algorithm's strategy directly determines the transmission performance bottleneck of the entire system.

[0040] Therefore, the embodiments of this application propose a novel C+L system power optimization algorithm. By introducing spectral slope monitoring points at optical amplifier sites through hardware or software solutions, this algorithm specifically compensates for the SRS effects across various spans in the engineering link, improving power flatness and further optimizing the transmission performance of the C+L band transmission system. The transmission performance improvements target scenarios including, but not limited to, improved OSNR performance at deployment, increased regulation speed during operation and maintenance, and coverage of power regulation capabilities in protection scenarios.

[0041] The meanings of the various symbols in the examples of this application are as follows:

[0042] Referring to FIG. 1 , FIG. 1 is a flow chart illustrating a first exemplary embodiment of a power regulation method of the present application. The power regulation method is applied to a broadband transmission system, the broadband transmission system including a plurality of amplifier groups and transmission spans between adjacent amplifier groups, the plurality of amplifier groups being used to transmit signals in a first band and signals in a second band. The power regulation method comprises the following steps:

[0043] Step S110, obtaining initial preset powers of the plurality of amplifier groups;

[0044] During operation, the main optical power of a wavelength division multiplexing (WDM) system must maintain the system's designed power budget to ensure proper receiver operation. Furthermore, to ensure that capacity expansion or other wavelength addition and subtraction operations do not impact existing service transmission, the system's optical amplifiers must operate in a gain-locked state. To improve service stability and reliability within the project and enhance service provisioning efficiency, the need for power optimization algorithms is becoming increasingly urgent.

[0045] Therefore, the embodiment of the present application increases the signal light slope monitoring point at the OLA site to specifically realize the stimulated Raman scattering (SRS) transfer power difference of each transmission span in the engineering transmission link (Optical Multiplex Section, OMS) and the slope tilt caused by the SRS transfer within the band, and performs targeted matching compensation respectively, thereby achieving a technology that further optimizes the transmission performance of the site opening and the operation and maintenance adjustment efficiency. Referring to Figure 2, Figure 2 is a schematic diagram of the power optimization algorithm monitoring and adjustment of the broadband transmission system in the power adjustment method of the present application, and its scenarios include but are not limited to OSNR performance improvement at the start of the site, improvement of adjustment speed during operation and maintenance, and power adjustment capability coverage in protection scenarios.

[0046] A broadband transmission system may be an optical communication system that utilizes the same optical fiber to simultaneously transmit multiple optical carriers of different wavelengths. The first wavelength band is different from the second wavelength band. Specifically, the first wavelength band may be one of the C-band, L-band, S-band, or U-band, and the second wavelength band may be another wavelength band of the C-band, L-band, S-band, or U-band that is different from the first wavelength band. In the embodiment of the present application, the first wavelength band may be the C-band, and the second wavelength band may be the L-band.

[0047] An amplifier group can include one or more amplifiers, including at least one of an optical preposition amplifier (OBA) (also known as a transmitting amplifier), an optical preposition amplifier (OPA) (also known as a receiving amplifier), an optical line amplifier (OLA), and an optical amplifier (OA). The OBA is located at the transmitting end of a transmission link and provides initial power gain. The OPA is located at the receiving end of a transmission link and provides signal pre-amplification to improve reception performance. The OLA is distributed throughout the transmission link and periodically amplifies the signal to overcome transmission losses in the optical fiber.

[0048] A transmission span can be any optical fiber transmission span within a transmission link in a broadband transmission system. An amplifier group can be provided at the inlet and / or outlet of a target transmission span. For example, a transmission link may include N transmission spans and N+1 amplifier groups.

[0049] Step S120: obtaining a power loss difference between the first band signal and the second band signal, and determining a target power adjustment amount corresponding to the initial preset power based on the power loss difference;

[0050] In actual applications, the optical power originally allocated to the C-band (a certain optical wavelength range) will be transferred to the L-band (another optical wavelength range). Therefore, to ensure power balance between the two bands, the power loss difference between the first-band signal and the second-band signal is calculated. Based on this power loss difference, the amount of adjustment required for the initial power setting can be determined, namely the target power adjustment amount.

[0051] Step S130, monitoring the total slope of the fiber-input spectrum of the transmission span, and obtaining the total slope of the outputs of the plurality of amplifier groups;

[0052] The amplifier's downslope refers to the spectral tilt or frequency response parameter generated after the optical signal is processed by the amplifier in a fiber-optic communication system. It can indicate the trend of the amplifier's amplification of the optical signal within a specific wavelength or frequency range as the frequency changes.

[0053] Spectral slope is a spectral characteristic of an optical signal, typically used to describe the relationship between the frequency or wavelength of an optical signal and its power. The spectral slope of an optical signal can provide information about the signal's spectral distribution and bandwidth.

[0054] The embodiments of this application take into account the common scenario in engineering environments where fiber parameters (such as length, insertion loss, and fiber type) vary significantly across spans within an OMS segment. For example, C-band power will shift to L-band power, with more C-band shortwave power shifted than longwave power, resulting in a spectral tilt. Therefore, the embodiments of this application introduce a spectral slope monitoring point at the optical amplifier (OLA) to monitor the slope of the signal spectrum and further optimize the transmission performance of the C+L band transmission system.

[0055] As an implementation scheme, by introducing a low-cost passive filter device or estimation model to monitor the signal spectrum slope at each OLA site, increasing the monitoring points of the power optimization algorithm, and fine-tuning the spectrum slope of each span, the OPM board commonly used in the industry or the sideband filter device proposed in this patent or other devices with the same function can be used to obtain the total spectrum slope, including the spectrum slope of the first band and the spectrum slope of the second band;

[0056] As another implementation scheme, the OLA slope may be calculated using a software algorithm based on the existing power detection points to obtain the total spectrum slopes of the first and second bands.

[0057] Step S140: determining a target expected slope and a target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the delivered total slope;

[0058] In order to control the spectrum characteristics of the signal, a target slope adjustment amount corresponding to a preset target expected slope may be determined according to the total spectrum slope and the total sent slope.

[0059] Step S150, when the target power adjustment amount does not meet the preset first threshold value, adjust the output power of the multiple amplifier groups to compensate for the power loss difference to perform power iterative adjustment, and when the target slope adjustment amount does not meet the preset second threshold value, update the target slope adjustment amount to perform slope iterative adjustment.

[0060] The SRS effect is strongly correlated with the input fiber power. If the input fiber power changes, the power transfer will also change. Therefore, the OA slope of the C-band and L-band is changed through iterative adjustment to compensate for the spectral tilt caused by the power transfer within the band, so that the power converges to the ideal state and ultimately outputs a relatively flat spectrum.

[0061] If the target power adjustment amount does not meet the preset first threshold value, it means that the effect of this power adjustment is not optimal. In this case, it is necessary to adjust the output power of several amplifier groups to update the power loss difference and perform power iterative adjustment.

[0062] Similarly, if the target slope adjustment does not meet the preset second threshold, it indicates that the signal's spectral characteristics still need correction. In this case, the target expected slope needs to be updated to iteratively adjust the slope to ensure that the signal's spectral characteristics meet the requirements. The first threshold is set for power adjustment, and the second threshold is set for slope adjustment.

[0063] The above threshold values ​​can be set based on the actual operating requirements of the wavelength division multiplexing system and are not specifically limited in this application. The smaller the first threshold value is set, the finer the precision of the power adjustment. A larger number of power adjustments can be performed to reduce the target power adjustment amount to less than the first threshold value. Similarly, the smaller the second threshold value is set, the finer the precision of the slope adjustment. A larger number of slope adjustments can be performed to reduce the target slope adjustment amount to less than the second threshold value.

[0064] In this way, automatic adjustment can improve efficiency and ensure performance in deployment scenarios; in capacity expansion scenarios, automatic adjustment can shorten service provisioning time and ensure that existing services are not affected; in operation and maintenance scenarios, automatic adjustment can promptly detect power changes and minimize the impact on services.

[0065] This embodiment, through the above-mentioned solution, specifically introduces spectral slope monitoring points in each amplifier group in the C+L multi-band broadband transmission system to achieve targeted matching compensation for the SRS effect across each span of the engineering link, thereby achieving the purpose of improving power flatness. In addition, since the SRS effect causes changes in power transfer, continuous iterative power adjustment is used to converge to the ideal state. This can effectively alleviate the technical problem of transmission performance imbalance caused by power transfer in the C+L multi-band broadband transmission system, further optimizing the transmission performance of the C+L multi-band broadband transmission system.

[0066] Referring to FIG. 3 , FIG. 3 is a flow chart illustrating a second exemplary embodiment of the power adjustment method of the present application. Based on the embodiment shown in FIG. 1 , the initial preset power includes a first preset power of an amplifier in the plurality of amplifier groups used to transmit the first band signal, and a second preset power of an amplifier used to transmit the second band signal. Step S110, obtaining the initial preset power of the plurality of amplifier groups, includes:

[0067] Step S310, when the plurality of amplifier groups communicate in series, obtaining the single-wavelength power and signal quantity of the first-band signal, and the single-wavelength power and signal quantity of the second-band signal;

[0068] In serial communication, multiple amplifier groups are connected in sequence to form an amplifier group chain. For example, a signal first passes through the first amplifier group, then enters the second, and so on until the transmission is complete. Each amplifier group increases the signal's power, ensuring that it can overcome losses over the transmission distance and reach its destination. This step-by-step amplification process allows signals to be transmitted over longer distances while maintaining signal quality.

[0069] Step S320 , calculating the single-wavelength power and the number of signals of the first band signal, and calculating the single-wavelength power and the number of signals of the second band signal, to obtain the first preset power and the second preset power.

[0070] By obtaining the single-wave power and signal quantity of the first band signal and the second band signal, the first preset power and the second preset power can be calculated. The initial preset power can be predetermined to ensure that the signal has an appropriate output power in each amplifier group.

[0071] For example, the expected single-wavelength input power of C-band and L-band signals is determined and channel number N C / L ; Adjust the initial preset power of OBA to

[0072] Adjust the output power of OA2, OA3, ..., OAN, and OPA to be consistent with the output power of OBA.

[0073] This embodiment adopts the above scheme, specifically by obtaining the single-wave power and signal quantity of the first-band signal, and the single-wave power and signal quantity of the second-band signal when the multiple amplifier groups communicate serially; calculating the single-wave power and signal quantity of the first-band signal, and calculating the single-wave power and signal quantity of the second-band signal, to obtain the first preset power and the second preset power, thereby maintaining stable performance, thereby ensuring that the first-band signal and the second-band signal can be reliably transmitted.

[0074] Referring to Figure 4 , which is a flowchart illustrating a third exemplary embodiment of the power adjustment method of the present application, based on the embodiment shown in Figure 1 , the initial preset power includes a first preset power of an amplifier in the plurality of amplifier groups used to transmit the first band signal, and a second preset power of an amplifier used to transmit the second band signal. Step S120 , obtaining a power loss difference between the first band signal and the second band signal, and determining a target power adjustment amount corresponding to the initial preset power based on the power loss difference, includes:

[0075] Step S410: Acquire a first fiber input power and a first fiber output power of the first wavelength band on the transmission span, and a second fiber input power and a second fiber output power of the second wavelength band on the transmission span;

[0076] Targeted compensation is performed for the effects between the SRS bands of each span by correcting the fiber OA of the C-band and L-band of each span. The C-band and L-band losses of each span in the optical link can be calculated using the first and last OA power monitoring points. The difference in C-band and L-band loss for a given transmission span is then obtained.

[0077] Step S420: Calculate the first fiber input power and the first fiber output power, and calculate the second fiber input power and the second fiber output power to obtain a first power loss and a second power loss, respectively.

[0078] Step S430: combining the first power loss and the second power loss to obtain the power loss difference;

[0079] Since in the optical fiber communication system, the signal will experience power loss during the transmission process, that is, the signal strength decreases, in order to maintain the signal quality, the power loss difference between the first band and the second band signals can be obtained. By measuring or monitoring the power of the first band signal entering the transmission span (first fiber input power) and leaving the transmission span (first fiber output power) through the OLA site, the power loss of the first band in the transmission span (first power loss) can be obtained, as well as the power of the second band signal entering the transmission span (second fiber input power) and leaving the transmission span (second fiber output power), the power loss of the second band in the transmission span (second power loss) can be obtained.

[0080] Step S440: Combining the first preset power, the preset first matching coefficient, and the power loss difference, and combining the second preset power, the first matching coefficient, and the power loss difference, respectively obtain a first expected power and a second expected power;

[0081] To ensure that the signal power in the system is within the expected range to maintain communication performance, the first preset power, the second preset power, and the obtained power loss difference are combined to determine the expected power, which is used to guide the elimination of the power loss difference.

[0082] The first matching coefficient is the SRS benefit compensation matching coefficient, which is used to determine the proportion of the OA slope adjustment amount close to the transmitting end in each span.

[0083] Step S450, combining the first expected power, the first fiber input power and the first fiber output power, and combining the second expected power, the second fiber input power and the second fiber output power, respectively obtain a first power adjustment amount corresponding to the first preset power and a second power adjustment amount corresponding to the second preset power.

[0084] To further adjust the amplifier's output power to ensure the signal maintains an ideal power level in the optical fiber communication system, the power adjustment amount corresponding to the first preset power and the second preset power can be calculated by combining the desired power, the input fiber power, and the output fiber power. The power adjustment amount is used to adjust the amplifier's output power.

[0085] For example, targeted compensation is performed for the effects between the various SRS bands. The OBA and ONA gains are adjusted to increase the C-band output power and decrease the L-band output power. This can be understood as follows: the expected output power of the first OA-C band span = the preset output power + γ*(total loss across the C-band span - total loss across the L-band span); the expected output power of the first OA-L band span = the preset output power - γ*(total loss across the C-band span - total loss across the L-band span); and the single gain adjustment amount = the expected output power - the current output power.

[0086] In step S140, when the target power adjustment amount does not meet a preset first threshold value, adjusting the output power of the plurality of amplifier groups to compensate for the power loss difference includes:

[0087] Step A460: When the target power adjustment amount does not meet a preset first threshold, adjusting the output power of the amplifiers in the plurality of amplifier groups used to transmit the first-band signal according to the first power adjustment amount to update the first power loss; and adjusting the output power of the amplifiers in the plurality of amplifier groups used to transmit the second-band signal according to the second power adjustment amount to update the second power loss.

[0088] The first power loss is the power loss of the first band in the transmission span, and the second power loss is the power loss of the second band in the transmission span.

[0089] Step A470: Combining the updated first power loss and the updated second power loss to compensate for the power loss difference.

[0090] The power loss difference can be used as a parameter to describe the power difference between the two band signals. By adjusting the amplifier output power based on the first and second power adjustment amounts, the power of the first and second band signals can be iteratively adjusted, thereby compensating for the SRS shift between the first and second band signals. This ensures that the power of the band signals throughout the communication link is maintained at an ideal level, avoiding signal loss or signal-to-noise ratio degradation, and maintaining the power balance of the bands within an appropriate range.

[0091] This embodiment uses the above solution to calculate the target power adjustment amount based on the power queried by the OA and the initial preset power, thereby ensuring that the power of the first band and the second band signals remains within the expected range during transmission, which can effectively maintain signal quality and performance. In addition, by continuously monitoring and iteratively updating the power of the band signals, the C+L multi-band broadband transmission system can maintain signal stability and reliability.

[0092] Referring to Figure 5, which is a flow chart of a fourth exemplary embodiment of the power regulation method of the present application. Based on the embodiment shown in Figure 1 above, the total spectrum slope includes a first spectrum slope of the first band signal and a second spectrum slope of the second band signal, and the total downlink slope includes a first downlink slope of the amplifiers in the plurality of amplifier groups used to transmit the first band signal and a second downlink slope of the amplifiers used to transmit the second band signal. Step S140, based on the total spectrum slope and the total downlink slope, determines a target expected slope and a target slope adjustment amount corresponding to the target expected slope, including:

[0093] Step S510: Calculate the first spectrum slope and the first sent slope, and calculate the second spectrum slope and the second sent slope to obtain a first slope difference between the beginning and the end of the span and a second slope difference between the beginning and the end of the span, respectively.

[0094] The first spectral slope is the spectral slope of the first band signal, and the first downlink slope is the actual downlink slope used by the amplifier group to transmit the first band signal. Similarly, the second spectral slope is the spectral slope of the second band signal, and the first downlink slope is the actual downlink slope used by the amplifier group to transmit the second band signal. To determine the spectral characteristic changes of the band signal within the transmission span, the difference between the first spectral slope and the first downlink slope, and between the second spectral slope and the second downlink slope, can be calculated to obtain the difference between the beginning and end slopes across the transmission span for the first band, as well as the difference between the beginning and end slopes across the transmission span for the second band.

[0095] Step S520: Combining the first slope difference between the beginning and the end of the span and the first transmitted slope, and combining the second slope difference between the beginning and the end of the span and the second transmitted slope, respectively obtain a first transfer slope of the first band signal and a second transfer slope of the second band signal;

[0096] In-band transfer slope refers to the relationship between optical signal power and frequency within a specific frequency range. It can be expressed as the rate of change of power with frequency, typically measured in dB / GHz or dB / nm. The transfer slope describes how the power of an optical signal changes with frequency within a band.

[0097] Step S530, obtaining a third spectral slope and a fourth spectral slope monitored by a post-amplifier group in the plurality of amplifier groups; wherein the third spectral slope corresponds to the first wavelength band, and the fourth spectral slope corresponds to the second wavelength band;

[0098] Step S540: combining the first transfer slope, the preset second matching coefficient, and the third spectral slope, and combining the second transfer slope, the second matching coefficient, and the fourth spectral slope to obtain a first expected slope and a second expected slope, respectively;

[0099] To calibrate or optimize the band signal, the expected slope can be calculated by combining the transfer slope, a pre-set matching coefficient, and the spectral slope monitored by the end optical amplifier (OPA).

[0100] The second matching coefficient is the SRS benefit compensation matching coefficient, which is used to determine the proportion of the OA slope adjustment amount of each span close to the transmitting end, and may be equal to or different from the first matching coefficient.

[0101] Step S550: Combine the first delivered slope and the first expected slope, and combine the second delivered slope and the second expected slope to obtain a first slope adjustment amount and a second slope adjustment amount, respectively.

[0102] To adjust the slope of the amplifier group so that the signal spectrum characteristics are consistent with the expected slope, the first slope adjustment amount and the second slope adjustment amount are calculated by combining the sent slope and the expected slope. The slope adjustment amount is used to adjust the slope of the amplifier to ensure that the spectrum characteristics of signals of different wavelengths remain stable during transmission.

[0103] For example, assuming that the transmitting end is leveled, the slope is 0, the number of fiber spans is N, the fiber output slope and fiber input slope of the nth fiber span signal are calculated, the initial OA slope is 0, and the transmitting end slope ratio coefficient is γ (0≤γ≤1);

[0104] In each iteration, the slope adjustment process of the power optimization algorithm mainly updates the slope of each OA based on the monitoring status of the current link, leveling the slope of the link's receiving end while ensuring a balance between the flatness of the OSNR of the entire link and the nonlinear cost.

[0105] The SRS transfer slope of the first transmission span fiber can be obtained by taking the signal slope monitored at the OA OUT monitoring port of each span, subtracting the slope of the OA monitoring port at the beginning and end of the span from the slope of the tail OA, and subtracting the slope of the tail OA. The single slope adjustment amount = the expected adjustment slope - the current slope. When the slope adjustment amount does not meet the second threshold, the difference between the expected adjustment slope and the actual slope is used as the iterative update value (i.e., the new slope adjustment amount). Similarly, the slope adjustment amount of each OA level is calculated according to the output slopes of each OLA site and the front-end OPM and rear-end OPM. The adjustment amount is distributed to OBA, OA2, OA3, ..., OAN, and OPA, completing the slope adjustment.

[0106] In step S150, when the target slope adjustment amount does not meet the preset second threshold value, the target slope adjustment amount is updated to perform slope iterative adjustment, including:

[0107] Step A560: When the target slope adjustment amount does not meet a preset second threshold, the difference between the first expected slope and the first issued slope is used as a new first slope adjustment amount, and the difference between the second expected slope and the second issued slope is used as a new second slope adjustment amount.

[0108] Step A570: adjusting the slopes of the amplifiers in the plurality of amplifier groups for transmitting the first band signal according to the first slope adjustment amount; and adjusting the slopes of the amplifiers in the plurality of amplifier groups for transmitting the second band signal according to the second slope adjustment amount.

[0109] When the slope adjustment amount does not meet the second threshold, in order to achieve automatic correction and adjustment of the spectrum characteristics of the first-band signal so that the final slope of the amplifier used to transmit the first band approaches the first expected slope, the difference between the first expected slope and the first transmitted slope is used as the new first slope adjustment amount. In other words, the difference between the expected adjustment slope and the actual transmitted slope is used as the iterative update value (i.e., the new first slope adjustment amount). This allows the system to perform adaptive slope adjustment based on the first slope adjustment amount, thereby ensuring that the first-band signal maintains consistency and stability during transmission, ultimately achieving a flat power output result. The same applies to the second-band signal.

[0110] This embodiment adopts the above scheme, specifically by combining the spectral slope and the downward slope, to calculate the cross-segment beginning and end slope difference caused by the SPS transfer, obtains the transfer slope according to the cross-segment beginning and end slope difference and the downward slope, and obtains the expected slope by combining the transfer slope and the spectral slope detected by the post-amplifier group. Then, according to the expected slope and the downward slope, the expected adjustment amount for adjusting the slope is obtained, thereby optimizing the signal performance of the corresponding band in the C+L multi-band broadband transmission system, and effectively realizing targeted compensation for the slope caused by the SRS transfer within the band; in addition, the difference between the expected slope and the downward slope is used as the iterative update value for iterative adjustment to converge to the ideal state, which can effectively improve the technical problem of imbalance in transmission performance caused by the power transfer phenomenon in the C+L multi-band broadband transmission system, and further optimize the transmission performance of the C+L multi-band broadband transmission system.

[0111] Referring to FIG6 , FIG6 is a flow chart of a fifth exemplary embodiment of the power regulation method of the present application. Based on any of the first to fourth embodiments above, the post-amplifier group is provided with an optical monitor, and step S230 of monitoring the total slope of the optical spectrum of the input fiber of the transmission span includes:

[0112] Step S610: respectively obtaining the center wavelength or frequency of the first wavelength band signal, the center wavelength or frequency of the second wavelength band signal, and the total power of the first wavelength band signal and the second wavelength band signal;

[0113] The slope of the OLA is predicted based on the slope monitoring algorithm of the existing monitoring points. The total power of the C-band and L-band obtained by querying the power monitoring point of each OA and the center wavelength or center frequency of the two bands can be used to directly fit a signal slope.

[0114] Step S620, fitting the wavelength or frequency of the center of the first band signal, the wavelength or frequency of the center of the second band signal, and the total power of the first band signal and the second band signal to obtain a fitting total slope;

[0115] The fitted signal slope is affected by inter-band power transfer caused by SRS, wavelength-dependent loss, insertion loss differences between C-band and L-band components (such as broadband optical multiplexing / demultiplexing boards (OBMs)), and OA power calibration errors. Therefore, there is a certain loss in accuracy. However, since the model is directly fitted using the power points monitored by the OA, there is no cascade error propagation and no need for self-calibration. Therefore, it may still be applicable to power optimization algorithms in scenarios where OBM insertion loss can be calibrated or estimated.

[0116] Step S630 : Combining the spectrum slope detected by the light monitor and the fitted total slope, the first band signal and the second band signal are compensated according to a preset ratio to obtain the first spectrum slope and the second spectrum slope.

[0117] Based on this simplified model, only one slope value can be obtained: the combined slope of the C and L bands. To distinguish the slopes of the C and L bands, the slope adjustment can be performed by combining the fitted total slope with the monitoring slope of the optical performance monitoring (OPM) at the receiving end to obtain a total spectral slope. The C and L slopes are then compensated according to a preset ratio to obtain the first and second spectral slopes.

[0118] This embodiment uses the above scheme, specifically by obtaining the total slope of the first band signal and the second band signal, and combining it with the slope monitored by the receiving end (end) OPM power monitoring device to compensate the spectral slope according to the ratio, to obtain the spectral slope information of the first band and the spectral slope information of the second band, thereby improving the efficiency and accuracy of slope monitoring.

[0119] Referring to FIG. 7 , FIG. 7 is a flow chart of a sixth exemplary embodiment of the power regulation method of the present application. Based on any of the first to fourth embodiments described above, each line amplifier group in the plurality of amplifier groups is configured with at least one sideband filtering module, the sideband filtering module including a sideband filtering device and a signal monitoring device. Step S230, monitoring the total slope of the fiber input spectrum of the transmission span, includes:

[0120] Step S710: Decompose the first band signal and the second band signal respectively by the sideband filter device to obtain a plurality of first sub-band groups of the first band signal and a plurality of second sub-band groups of the second band signal;

[0121] By adding spectral slope monitoring to each OLA site in the C+L system, the signal slope of each span can be calculated based on the slope monitoring values ​​at each OLA site. This monitoring method can be an optical performance monitoring board (OPM) or a slope monitoring solution based on low-cost passive filtering devices, as described in the embodiments of this application.

[0122] Step S720: monitoring the total power and center frequency of the optical channels of the first sub-band groups and the total power and center frequency of the optical channels of the second sub-band groups by the signal monitoring device;

[0123] Step S730 : Fitting the total optical channel powers and center frequencies of the first sub-band groups and fitting the total optical channel powers and center frequencies of the second sub-band groups to obtain the first spectral slope and the second spectral slope, respectively.

[0124] The main function of sideband filtering is to filter the signal spectrum into several sub-bands, which can be understood as a broadband demultiplexing device. Its cost is mainly reflected in the number of sub-bands; the fewer sub-bands, the lower the cost. The sideband filter device implements slope monitoring by utilizing the full-wave transmission conditions of the C+L band filler wave architecture. The sideband filter device divides the input spectrum into N sub-bands. Each sub-band is connected to a PD device to monitor the total optical channel power within it. The power of each sub-band and its corresponding center frequency can be used to fit a spectral slope.

[0125] Referring further to Figure 8, which illustrates the design of a sideband filter device for the power regulation method of this application, the sideband filter device can be packaged into a small form-factor pluggable module (SFP) or a single board. A 1x2 optical switch enables shared monitoring of bidirectional links at OLA sites. After power acquisition, the single board performs slope fitting calculations and reporting. Given that OLA sites generally only need to monitor bidirectional traffic, if the device is relatively large, it can be packaged into a single board, which is expected to occupy only half a slot.

[0126] This embodiment uses the above solution, specifically by introducing a low-cost passive filter device at each OLA site to extract and fit the channel power, thereby effectively reducing the cost of slope monitoring.

[0127] Referring to FIG9 , FIG9 is a flow chart of a seventh exemplary embodiment of the power regulation method of the present application. Based on the embodiment shown in FIG1 above, the transmission span includes a plurality of channels. Step S140, after determining the target expected slope and the target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total transmitted slope, further includes:

[0128] Step S910, when the target power adjustment amount satisfies the first threshold value and the target slope adjustment amount satisfies the second threshold value, obtaining a power output flatness result;

[0129] Step S920 : Based on the power output flatness result, a channel-level strategy is adopted to adjust the power of the plurality of channels.

[0130] When the target power adjustment value satisfies the first threshold value and the target slope adjustment value satisfies the second threshold value, a flat power output result can be obtained, which indicates that the signal power has been adjusted to an appropriate level and the signal spectrum characteristics have been corrected.

[0131] Furthermore, since a C+L multi-band broadband transmission system typically has multiple channels, each of which may have a different wavelength or frequency, a channel-level strategy can be used to further adjust the power of multiple channels after achieving a flat power output. In this embodiment, WSS is used to fine-tune the power of each channel, achieving overall or partial power adjustment for multiple channels to ensure consistent performance across the entire communication system.

[0132] This embodiment uses the above-mentioned solution to achieve signal power balance and spectral characteristic correction in the C+L multi-band broadband transmission system, so that the post-amplifier group can output a relatively flat spectrum. Then, a channel-level strategy is adopted to fine-tune the power of several channels in different transmission links to ensure the stability and performance of the entire system.

[0133] Referring to Figure 10, which is a flowchart of an eighth exemplary embodiment of the power regulation method of the present application, based on the first to seventh embodiments above, the specific implementation steps of the improved C+L system power regulation method may include:

[0134] First, when the site is commissioned, the initial value of OBA in the broadband transmission system is set, a fill wave is added, and the transmitting end is leveled;

[0135] Then, the OBA-OLA-OPA gain is adjusted in series to make the output power of the OLA and OPA consistent with the output power of the OBA. The power difference between the OBA-OLA-OPA is △P1, and the threshold corresponding to △P1 is a1.

[0136] Then, the inter-band SRS transfer of each span is placed on the OA of each span for matching compensation; wherein, the inter-band SRS transfer is △P2, and the threshold value corresponding to △P2 is a2;

[0137] Then, the SRS shift within each span is placed on the OA of each span for matching compensation; wherein, the SRS shift within the band is △S, and the threshold value corresponding to △S is a3;

[0138] Determine whether △P1 is less than or equal to a1, △P2 is less than or equal to a2, and △S is less than or equal to a3;

[0139] If △P1 is less than or equal to a1, △P2 is less than or equal to a2, and △S is less than or equal to a3, the power output is flat, and channel-level APO is performed, and power fine-tuning is performed for each channel through WSS;

[0140] Otherwise, the process returns to the step of serially adjusting the OBA-OLA-OPA gain to make the output powers of the OLA and OPA consistent with the output power of the OBA, until ΔP1 is less than or equal to a1, ΔP2 is less than or equal to a2, and ΔS is less than or equal to a3.

[0141] Thus, the power regulation algorithm based on OLA site slope monitoring in the embodiment of the present application has advantages in improving the transmission performance of the C+L system and improving the efficiency in operation and maintenance scenarios.

[0142] In terms of performance, the new C+L system power optimization algorithm improves end-to-end OSNR for both single and multi-MS cases for engineering links with significant differences in SRS transfer volume. In terms of operational efficiency, the new C+L system power optimization algorithm significantly reduces the number of slope iterations in optical path preservation scenarios, limiting slope adjustment to the first and last OAs of the span with varying loss. Furthermore, in OMS protection scenarios with non-redundant OAs, the new C+L system power optimization algorithm ensures more complete optical path preservation on the backup path, further guaranteeing its performance.

[0143] In addition, an embodiment of the present application further provides a power regulation system, wherein the broadband transmission system includes a plurality of amplifier groups and transmission spans between adjacent amplifier groups, wherein each line amplifier group in the plurality of amplifier groups is configured with at least one sideband filtering module;

[0144] The plurality of amplifier groups are used to transmit first band signals and second band signals;

[0145] The sideband filtering module is used to monitor the total slope of the fiber input spectrum of the transmission span;

[0146] The broadband transmission system is used to obtain the initial preset power of the multiple amplifier groups; obtain the power loss difference between the first band and the second band signals, and determine the target power adjustment amount corresponding to the initial preset power based on the power loss difference; obtain the total downward slope corresponding to each of the multiple amplifier groups; determine the target expected slope and the target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total downward slope; when the target power adjustment amount does not meet the preset first threshold value, adjust the output power of the multiple amplifier groups to compensate for the power loss difference to perform power iterative adjustment; and when the target slope adjustment amount does not meet the preset second threshold value, update the target slope adjustment amount to perform slope iterative adjustment.

[0147] Refer to Figure 2, which is a schematic diagram of the power optimization algorithm monitoring and adjustment of the broadband transmission system in the power regulation method of the present application, wherein the broadband transmission system includes a preamplifier group, a line amplifier group, and a postamplifier group, the line amplifier group includes one or more, the preamplifier group and the postamplifier group are respectively provided with an OPM, the line amplifier group is provided with a sideband filter device shown in Figure 8, and the slope monitoring point of the OUT port of the OA is used to convert the slope of each span of optical fiber.

[0148] The sideband filtering module includes a sideband filtering device and a signal monitoring device, wherein the sideband filtering device is encapsulated in a pluggable module, and the pluggable module is connected to the line amplifier group via an optical switch; or the sideband filtering device is encapsulated in a single-board module, and the single-board module is connected to the line amplifier group via the optical switch; the total spectrum slope includes a first spectrum slope of the first band signal and a second spectrum slope of the second band signal;

[0149] The sideband filter device is used to decompose the first band signal and the second band signal respectively to obtain a plurality of first sub-band groups of the first band signal and a plurality of second sub-band groups of the second band signal;

[0150] The signal monitoring device is used to monitor the total power and center frequency of the optical channels of the first sub-band groups and the total power and center frequency of the optical channels of the second sub-band groups;

[0151] The broadband transmission system is further configured to fit the total optical channel power and center frequency of the first sub-band groups, and fit the total optical channel power and center frequency of the second sub-band groups, to obtain the first spectral slope and the second spectral slope, respectively.

[0152] As shown in Figure 8, the sideband filter component can be packaged into a small form-factor pluggable (SFP) module or a single board. A 1x2 optical switch enables shared monitoring of bidirectional links at OLA sites. After power acquisition, the board performs slope fitting and reporting. Given that OLA sites generally only need to monitor bidirectional traffic, if the component is larger, it can be packaged into a single board, which is expected to occupy only half a slot.

[0153] For the principle and implementation process of power regulation in this embodiment, please refer to the above embodiments and will not be repeated here.

[0154] In addition, an embodiment of the present application also proposes a terminal device, as shown in Figure 11, the terminal device includes a memory 802, a processor 801 and a power regulation program stored on the memory and runnable on the processor, and when the power regulation program is executed by the processor, the steps of the power regulation method described above are implemented.

[0155] Since this power regulation program adopts all the technical solutions of all the aforementioned embodiments when executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0156] In addition, an embodiment of the present application further provides a computer-readable storage medium, on which a power regulation program is stored. When the power regulation program is executed by a processor, the steps of the power regulation method described above are implemented.

[0157] Since this power regulation program adopts all the technical solutions of all the aforementioned embodiments when executed by the processor, it has at least all the beneficial effects brought by all the technical solutions of all the aforementioned embodiments, which will not be described one by one here.

[0158] Compared with the prior art, the power regulation method, broadband transmission system, terminal device and storage medium proposed in the embodiments of the present application obtain the initial preset power of the several amplifier groups; obtain the power loss difference between the first band signal and the second band signal, and determine the target power adjustment amount corresponding to the initial preset power based on the power loss difference; monitor the total slope of the fiber-input spectrum of the transmission span and obtain the total downward slope of the several amplifier groups; determine the target expected slope and the target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total downward slope; when the target power adjustment amount does not meet the preset first threshold value, compensate for the power loss difference to perform power iterative adjustment, and when the target slope adjustment amount does not meet the preset second threshold value, update the target slope adjustment amount to perform slope iterative adjustment.

[0159] Based on the solution of the present application, by introducing spectral slope monitoring points in each amplifier group in the C+L multi-band broadband transmission system, targeted matching compensation of the SRS effects of each cross-segment in the engineering link is achieved, thereby achieving the purpose of improving power flatness; in addition, since the SRS effect causes changes in power transfer, continuous iterative power adjustment is used to converge to the ideal state, which can effectively improve the technical problem of imbalance in transmission performance caused by the power transfer phenomenon in the C+L multi-band broadband transmission system, and further optimize the transmission performance of the C+L multi-band broadband transmission system.

[0160] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0161] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0162] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as mentioned above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the method of each embodiment of the present application.

[0163] The above are only some embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power regulation method, wherein: The power regulation method is applied to a broadband transmission system, the broadband transmission system comprising a plurality of amplifier groups and transmission spans between adjacent amplifier groups, the plurality of amplifier groups being used to transmit a first band signal and a second band signal, the power regulation method comprising the following steps: Obtaining initial preset powers of the plurality of amplifier groups; Acquire a power loss difference between the first band signal and the second band signal, and determine a target power adjustment amount corresponding to the initial preset power based on the power loss difference; Monitoring the total slope of the fiber-input spectrum of the transmission span, and obtaining the total slope of the transmission of the plurality of amplifier groups; Determine a target expected slope and a target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total sent slope; When the target power adjustment amount does not meet the preset first threshold value, the output power of the plurality of amplifier groups is adjusted to compensate for the power loss difference to perform power iterative adjustment, and when the target slope adjustment amount does not meet the preset second threshold value, the target slope adjustment amount is updated to perform slope iterative adjustment.

2. The power regulation method according to claim 1, wherein: The initial preset power includes a first preset power of an amplifier in the plurality of amplifier groups for transmitting the first band signal, and a second preset power of an amplifier for transmitting the second band signal. The step of obtaining a power loss difference between the first band signal and the second band signal, and determining a target power adjustment amount corresponding to the initial preset power based on the power loss difference comprises: Acquire a first fiber input power and a first fiber output power of the first band on the transmission span, and a second fiber input power and a second fiber output power of the second band on the transmission span; Calculating the first fiber input power and the first fiber output power, and calculating the second fiber input power and the second fiber output power, to obtain a first power loss and a second power loss respectively; combining the first power loss and the second power loss to obtain the power loss difference; Combining the first preset power, the preset first matching coefficient and the power loss difference, combining the second preset power, the first matching coefficient and the power loss difference, respectively obtain a first expected power and a second expected power; By combining the first expected power, the first fiber input power and the first fiber output power, and combining the second expected power, the second fiber input power and the second fiber output power, a first power adjustment amount corresponding to the first preset power and a second power adjustment amount corresponding to the second preset power are obtained respectively.

3. The power regulation method according to claim 2, wherein: The step of adjusting the output power of the plurality of amplifier groups to compensate for the power loss difference comprises: According to the first power adjustment amount, adjusting the output power of the amplifiers in the plurality of amplifier groups for transmitting the first band signal to update the first power loss, and, according to the second power adjustment amount, adjusting the output power of the amplifiers in the plurality of amplifier groups for transmitting the second band signal to update the second power loss; The updated first power loss is combined with the updated second power loss to compensate for the power loss difference.

4. The power regulation method according to claim 2, wherein: The step of obtaining the initial preset powers of the plurality of amplifier groups comprises: When the plurality of amplifier groups communicate in series, obtaining the single-wave power and the number of signals of the first-band signal, and the single-wave power and the number of signals of the second-band signal; The single-wave power and the number of signals of the first-band signal are calculated, and the single-wave power and the number of signals of the second-band signal are calculated to obtain the first preset power and the second preset power.

5. The power regulation method according to claim 1, wherein: The total spectrum slope includes a first spectrum slope of the first band signal and a second spectrum slope of the second band signal; the total downlink slope includes a first downlink slope of the amplifiers in the plurality of amplifier groups used to transmit the first band signal and a second downlink slope of the amplifiers used to transmit the second band signal; The step of determining a target expected slope and a target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total sent slope includes: Calculating the first spectrum slope and the first down-transmitted slope, and calculating the second spectrum slope and the second down-transmitted slope, to obtain a first slope difference between the beginning and the end of the span and a second slope difference between the beginning and the end of the span, respectively; Combining the first slope difference between the beginning and the end of the span and the first sent slope, combining the second slope difference between the beginning and the end of the span and the second sent slope, respectively obtain a first transfer slope of the first band signal and a second transfer slope of the second band signal; Acquire a third spectral slope and a fourth spectral slope monitored by a post-amplifier group in the plurality of amplifier groups; wherein the third spectral slope corresponds to the first waveband, and the fourth spectral slope corresponds to the second waveband; Combining the first transfer slope, the preset second matching coefficient and the third spectral slope, combining the second transfer slope, the second matching coefficient and the fourth spectral slope, respectively obtain a first expected slope and a second expected slope; The first sent slope and the first expected slope are combined, and the second sent slope and the second expected slope are combined to obtain a first slope adjustment amount and a second slope adjustment amount respectively.

6. The power regulation method according to claim 5, wherein: The step of updating the target slope adjustment amount to perform slope iterative adjustment includes: Using the difference between the first expected slope and the first issued slope as a new first slope adjustment amount, and using the difference between the second expected slope and the second issued slope as a new second slope adjustment amount; According to the first slope adjustment amount, the slope of the amplifiers in the plurality of amplifier groups used for transmitting the first band signal is adjusted; according to the second slope adjustment amount, the slope of the amplifiers in the plurality of amplifier groups used for transmitting the second band signal is adjusted.

7. The power regulation method according to any one of claims 1 to 5, wherein: The post-amplifier group is provided with an optical monitor, and the step of monitoring the total slope of the fiber-input spectrum of the transmission span comprises: Respectively obtaining the wavelength or frequency of the center of the first band signal, the wavelength or frequency of the center of the second band signal, and the total power of the first band signal and the second band signal; Fitting the wavelength or frequency of the center of the first band signal, the wavelength or frequency of the center of the second band signal, and the total power of the first band signal and the second band signal to obtain a fitting total slope; The spectrum slope detected by the light monitor and the fitted total slope are combined to compensate the first waveband signal and the second waveband signal respectively according to a preset ratio, so as to obtain the first spectrum slope and the second spectrum slope.

8. The power regulation method according to any one of claims 1 to 5, wherein: Each of the line amplifier groups in the plurality of amplifier groups is configured with at least one sideband filter module, wherein the sideband filter module includes a sideband filter device and a signal monitoring device, and the step of monitoring the total slope of the fiber input spectrum of the transmission span includes: Decomposing the first band signal and the second band signal respectively by the sideband filter device to obtain a plurality of first sub-band groups of the first band signal and a plurality of second sub-band groups of the second band signal; Monitoring the total power and center frequency of the optical channels of the plurality of first sub-band groups and the total power and center frequency of the optical channels of the plurality of second sub-band groups by the signal monitoring device; The optical channel total powers and center frequencies of the plurality of first sub-band groups are fitted, and the optical channel total powers and center frequencies of the plurality of second sub-band groups are fitted to obtain the first spectrum slope and the second spectrum slope respectively.

9. The power regulation method according to claim 1, wherein: The transmission span includes a plurality of channels. After the step of determining a target expected slope and a target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total downlink slope, the method further includes: When the target power adjustment amount satisfies the first threshold value and the target slope adjustment amount satisfies the second threshold value, a power output flatness result is obtained; Based on the power output flatness result, a channel-level strategy is adopted to adjust the power of the plurality of channels.

10. A broadband transmission system, wherein: The broadband transmission system comprises a plurality of amplifier groups and transmission spans between adjacent amplifier groups, wherein each line amplifier group in the plurality of amplifier groups is configured with at least one sideband filtering module; The plurality of amplifier groups are used to transmit first band signals and second band signals; The sideband filtering module is used to monitor the total slope of the fiber input spectrum of the transmission span; The broadband transmission system is used to obtain the initial preset power of the plurality of amplifier groups; obtain the power loss difference between the first band and the second band signals, and determine the target power adjustment amount corresponding to the initial preset power based on the power loss difference; obtain the total downward slope corresponding to each of the plurality of amplifier groups; determine the target expected slope and the target slope adjustment amount corresponding to the target expected slope based on the total spectrum slope and the total downward slope; when the target power adjustment amount does not meet the preset first threshold value, adjust the output power of the plurality of amplifier groups to compensate for the power loss difference to perform power iterative adjustment, and when the target slope adjustment amount does not meet the preset second threshold value, update the target slope adjustment amount to perform slope iterative adjustment.

11. The broadband transmission system according to claim 10, wherein: The sideband filter module includes a sideband filter device and a signal monitoring device, wherein the sideband filter device is packaged in a pluggable module, and the pluggable module is connected to the line amplifier group through an optical switch; or the sideband filter device is packaged in a single-board module, and the single-board module is connected to the line amplifier group through the optical switch; the total spectrum slope includes a first spectrum slope of the first band signal and a second spectrum slope of the second band signal; The sideband filter device is used to decompose the first band signal and the second band signal respectively to obtain a plurality of first sub-band groups of the first band signal and a plurality of second sub-band groups of the second band signal; The signal monitoring device is used to monitor the total power and center frequency of the optical channels of the first sub-band groups and the total power and center frequency of the optical channels of the second sub-band groups; The broadband transmission system is also used to fit the total optical channel power and center frequency of the plurality of first sub-band groups, and to fit the The total power and center frequency of the optical channels of the plurality of second sub-band groups are used to obtain the first spectrum slope and the second spectrum slope respectively.

12. A terminal device, wherein: The terminal device includes a memory, a processor, and a power regulation program stored in the memory and executable on the processor, and the power regulation program, when executed by the processor, implements the steps of the power regulation method as described in any one of claims 1 to 9.

13. A computer-readable storage medium, wherein: The computer-readable storage medium stores a power regulation program, and when the power regulation program is executed by the processor, the steps of the power regulation method according to any one of claims 1 to 9 are implemented.

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