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

Abstract

The present application discloses a power regulation method, a broadband transmission system, a terminal device and a storage medium, wherein the power regulation method comprises: obtaining initial preset powers of a plurality of amplifier groups; obtaining a power loss difference between a first band signal and a second band signal, and determining a target power regulation 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 to obtain the total downward slope of the plurality of amplifier groups; 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 downward slope; when the target power adjustment amount does not meet a preset first threshold value, adjusting the output powers of the plurality of amplifier groups to compensate for the power loss difference so as to perform power iterative regulation, and when the target slope adjustment amount does not meet a preset second threshold value, updating the target slope adjustment amount so as to perform slope iterative regulation, which can solve the technical problem that the transmission performance is unbalanced due to the power transfer phenomenon.

Description

Technical Field

[0001] 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

[0002] Compared with the traditional C-band system, a notable feature of the multi-band broadband transmission system (C+L system) including C-band signals and L-band signals is the existence of a strong stimulated Raman scattering (SRS) effect.

[0003] On the one hand, the SRS effect will cause power transfer from high-frequency or short-wave channels to low-frequency or long-wave channels, and the power transfer will significantly change the signal power distribution in the two bands propagating along the optical fiber. This stimulated Raman scattering effect, the wavelength-dependent loss of the optical fiber, and the wavelength-dependent characteristics of the amplifier gain and noise spectrum further aggravate the performance imbalance between different wavelength division multiplexing channels, or the uneven optical signal-to-noise ratio (OSNR). This imbalance will accumulate with the increase of transmission distance, and will eventually limit the overall transmission distance of the optical link due to the bottleneck problem at the worst wavelength of OSNR. On the other hand, the SRS effect is strongly related to the fiber input power. If the fiber input power changes, the power transfer will also change, resulting in an imbalance in the transmission performance of the C+L multi-band broadband transmission system.

[0004] 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. Summary of the invention

[0005] 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 unbalanced transmission performance caused by power transfer phenomenon in a C+L multi-band broadband transmission system.

[0006] To achieve the above object, the present application provides a power regulation method, which is applied to a broadband transmission system, wherein the broadband transmission system includes a plurality of amplifier groups and transmission spans between adjacent amplifier groups, wherein the plurality of amplifier groups are used to transmit a first band signal and a second band signal, and the power regulation method includes 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; 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; 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.

[0007] The embodiment of the present application further provides a broadband transmission system, the 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; 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.

[0008] 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 executable on the processor, wherein the power regulation program implements the steps of the power regulation method described above when executed by the processor.

[0009] 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.

[0010] 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 plurality of 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 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, 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.

[0011] 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 to achieve the purpose of improving power flatness; in addition, since the SRS effect causes changes in power transfer, the power adjustment is continuously iterated to converge to the ideal state, which can effectively improve the technical problem of unbalanced 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a flow chart of a first exemplary embodiment of a power regulation method of the present application; Figure 2 A schematic diagram of monitoring and adjusting the power optimization algorithm of a broadband transmission system in the power adjustment method of this application; Figure 3 This is a flow chart of a second exemplary embodiment of the power regulation method of the present application; Figure 4 This is a flow chart of a third exemplary embodiment of the power regulation method of the present application; Figure 5 This is a flow chart of a fourth exemplary embodiment of a power regulation method of the present application; Figure 6 A schematic diagram of a fifth exemplary embodiment of a power regulation method of the present application; Figure 7 This is a flow chart of a sixth exemplary embodiment of the power regulation method of the present application; Figure 8 A schematic diagram of the design of a sideband filter device for the power regulation method of this application; Fig. 9 This is a flow chart of a seventh exemplary embodiment of the power regulation method of the present application; Fig.10 This is a flow chart of an eighth exemplary embodiment of the power regulation method of the present application; Fig.11 A schematic diagram of the structure of a terminal device provided for the ninth exemplary embodiment of the power regulation method of the present application.

[0013] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0014] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0015] 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.

[0016] 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 to achieve the purpose of improving power flatness; in addition, since the SRS effect causes changes in power transfer, the power adjustment is continuously iterated to converge to the ideal state, which can effectively improve the technical problem of unbalanced 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.

[0017] The embodiments of the present application take into account that the necessity of the power optimization algorithm in the C+L multi-band broadband transmission system is mainly reflected in two aspects. First, the power transfer caused by the Raman nonlinear effect existing in the C+L system itself will cause serious imbalance in the transmission performance of the signal; second, the optical network has an increasingly strong demand for intelligent operation and maintenance.

[0018] Specifically, compared with the traditional C-band system, a notable feature of the C+L system is the strong stimulated Raman scattering effect. It will cause 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 bands propagating along the optical fiber. This effect, together with the wavelength-dependent loss of the optical fiber and the wavelength-dependent characteristics of the amplifier gain and noise spectrum, further aggravates the performance imbalance between different wavelength division multiplexing channels, or OSNR unevenness. This imbalance will accumulate with the increase of transmission distance, and will eventually limit the overall transmission distance of the optical link due to the bottleneck problem at the wavelength with the worst OSNR.

[0019] Secondly, as operators have increasingly strong demands for intelligent operation and maintenance of optical networks, power optimization algorithms have become an essential adjustment tool for optical transmission systems. At present, it is an industry consensus that C-band optical transmission needs to have a complete power optimization algorithm. The existing C-band power optimization algorithm needs to complete the end-to-end power automatic adjustment of multiplexing section and channel-level services, automatic power adjustment of service up and down paths, and automatic power maintenance of optical path degradation in the scenarios of site opening, capacity expansion, and operation and maintenance. The power optimization algorithm of the C+L system is more complex to adjust, and it is necessary to finely adjust the power to balance the OSNR performance. On the one hand, the system needs to adjust the OA gain of the C and L bands separately to compensate for the cross-band loss and power transfer between bands. On the other hand, it is also necessary to change the OA slope of the C and L bands through iterative adjustment to compensate for the spectral tilt caused by power transfer within the band. Finally, it is necessary to adjust the WSS attenuation to accurately control the fiber input power of each channel. In complex scenarios, this is a demand that manual adjustment cannot cover or cannot meet the time requirements at all. Therefore, the value of the automated power optimization algorithm in the C+L system is more obvious.

[0020] It is a consensus in the industry that the C+L system must have a power regulation algorithm. It can be said that the power regulation algorithm is one of the keys to maintaining channel performance and service stability in the C+L system. The strategy of the power regulation algorithm directly determines the transmission performance bottleneck of the entire system.

[0021] Therefore, the embodiment of the present application proposes a new algorithm for C+L system power optimization, which introduces a spectral slope monitoring point at the optical amplification site through hardware or software solutions, and specifically realizes the matching compensation of the SRS effects of each span in the engineering link, so as to achieve the purpose of improving power flatness and further optimize the transmission performance of the C+L band transmission system. The scenarios for transmission performance improvement include but are not limited to OSNR performance improvement at the start of the operation, improvement of adjustment speed during operation and maintenance, and coverage of power adjustment capabilities in protection scenarios.

[0022] It should be noted that the meanings of the various formula symbols in the embodiments of the present application are as follows:

[0023] Reference Figure 1 , Figure 1 This is a flow chart of 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 includes a plurality of amplifier groups, and transmission spans between adjacent amplifier groups, the plurality of amplifier groups are used to transmit a first band signal and a second band signal, the power regulation method includes the following steps: Step S110, obtaining initial preset powers of the plurality of amplifier groups; Since the main optical power of the wavelength division system must maintain the power budget of the system design to ensure the normal operation of the receiver, and in order to ensure that capacity expansion or other operations of adding or reducing wavelengths do not affect the existing service transmission, the optical amplifiers in the system are required to work in a gain locked state. In order to improve the stability and reliability of services in the project and improve the efficiency of service provisioning, the demand for power optimization algorithms is becoming increasingly urgent.

[0024] Therefore, the embodiment of the present application increases the signal light slope monitoring point of the OLA site, and specifically realizes 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, so as to realize the technology of further optimizing the transmission performance of the site opening and the operation and maintenance adjustment efficiency. Figure 2 , Figure 2 This is a schematic diagram of the power optimization algorithm monitoring and adjustment of the broadband transmission system in the power regulation method of this application, and its scenarios include but are not limited to OSNR performance improvement at startup, improvement of adjustment speed during operation and maintenance, and power regulation capability coverage in protection scenarios.

[0025] Specifically, the broadband transmission system may be an optical communication system that uses the same optical fiber to simultaneously transmit multiple optical carriers of different wavelengths. The wavelength of the first band is different from the wavelength of the second band. Specifically, the first band may be one of the C band, the L band, the S band, or the U band, and the second band may be another one of the C band, the L band, the S band, or the U band that is different from the first band. In an embodiment of the present application, the first band may be the C band, and the second band may be the L band.

[0026] The amplifier group may include one or more amplifiers, which may be 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 the transmission link and is used for initial power gain; the OPA is located at the receiving end of the transmission link and is used for signal pre-amplification to improve receiving performance; the OLA is distributed in the transmission link and periodically amplifies the signal to overcome transmission losses in the optical fiber.

[0027] The transmission span can be any optical fiber transmission span in a transmission link in a broadband transmission system; the amplifier group can be arranged at the inlet side of the target transmission span and / or the outlet side of the target transmission span. For example, a transmission link includes N transmission spans and N+1 amplifier groups.

[0028] 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; Specifically, 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, in order to ensure the power balance between the two bands, the power loss difference between the first band signal and the second band signal is calculated, and based on the power loss difference, the amount by which the initial setting power needs to be adjusted, i.e., the target power adjustment amount, can be determined.

[0029] Step S130, monitoring the total slope of the fiber-input spectrum of the transmission span, and obtaining the total slope of the transmission spectrum of the plurality of amplifier groups; Specifically, the amplifier's downward slope refers to the spectrum tilt or frequency response parameter generated after the optical signal is processed by the amplifier in the optical fiber 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.

[0030] Spectral slope is one of the spectral characteristics of an optical signal, which is usually 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 spectral distribution and bandwidth of the signal.

[0031] The embodiments of the present application take into account that in an engineering environment, it is a common scenario that the fiber parameters (length, insertion loss, fiber type, etc.) of each span in an OMS segment are quite different. For example, the C-band power will be transferred to the L-band power, and during the transfer, the short-wave of the C-band is transferred more, and the long-wave of the C-band is transferred less, resulting in a tilted spectrum. Therefore, the embodiments of the present application introduce a spectrum slope monitoring point at the optical amplifier site (OLA) to monitor the slope of the signal spectrum, and further optimize the transmission performance of the C+L band transmission system.

[0032] As an implementation scheme, by introducing a low-cost passive filter device or an estimation model to monitor the signal spectrum slope at each OLA site, increasing the monitoring points of the power optimization algorithm, and finely matching and adjusting the spectrum slope of each span, it can be an OPM single board commonly used in the industry or a sideband filter device proposed in this patent or other devices with the same function, to obtain the total spectrum slope, including the spectrum slope of the first band and the spectrum slope of the second band; As another implementation scheme, the OLA slope may be calculated by a software algorithm based on the existing power detection points to obtain the total spectrum slopes of the first band and the second band.

[0033] 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 total sent slope; Specifically, 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.

[0034] Step S150, 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.

[0035] Specifically, the SRS effect is strongly correlated with the fiber input power. If the fiber input power changes, the power transfer will also change. Therefore, the OA slope of the C-band and L-band is changed by 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 finally outputs a relatively flat spectrum.

[0036] If the target power adjustment amount does not meet the preset first threshold value, it means that the effect of this power adjustment has not reached the best effect. 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.

[0037] Similarly, if the target slope adjustment amount does not meet the preset second threshold value, it means that the spectrum characteristics of the signal still need to be corrected. In this case, the target expected slope needs to be updated to perform slope iterative adjustment to ensure that the spectrum characteristics of the signal meet the requirements. The first threshold value is set for power adjustment, and the second threshold value is set for slope adjustment.

[0038] The above threshold values ​​can be set according to the actual working requirements of the wavelength division multiplexing system, and this application does not impose specific restrictions. The smaller the first threshold value is set, the finer the precision of the power adjustment, and the target power adjustment amount can be made less than the first threshold value by performing more power adjustments. Similarly, the smaller the second threshold value is set, the finer the precision of the slope adjustment, and the target slope adjustment amount can be made less than the second threshold value by performing more slope adjustments.

[0039] 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 detect power changes in a timely manner and minimize the impact on services.

[0040] This embodiment adopts the above scheme, specifically by introducing spectral slope monitoring points in each amplifier group in the C+L multi-band broadband transmission system, to achieve targeted matching compensation of SRS effects across each segment in the engineering link, thereby achieving the purpose of improving power flatness; in addition, since the SRS effect causes changes in power transfer, the power adjustment is continuously iterated to converge to an ideal state, which can effectively improve the technical problem of unbalanced 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.

[0041] Reference Figure 3 , Figure 3 This is a flow chart of the second exemplary embodiment of the power regulation method of this application. Figure 1 In the embodiment shown, 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. Step S110, obtaining the initial preset power of the plurality of amplifier groups, includes: Step S310, when the plurality of amplifier groups communicate in series, obtaining the single-wavelength power and the number of signals of the first-band signal, and the single-wavelength power and the number of signals of the second-band signal; Specifically, in serial communication, multiple amplifier groups are connected together in sequence to form an amplifier group link. For example, the signal first passes through the first amplifier group, then enters the second amplifier group, and so on until the transmission is completed. Each amplifier group increases the power of the signal to ensure that the signal can overcome the loss in the transmission distance and reach the destination. This step-by-step amplification process can transmit the signal to a longer distance while maintaining the quality of the signal.

[0042] 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.

[0043] Specifically, by acquiring 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.

[0044] Exemplarily, the expected single-wavelength fiber power of C-band and L-band signals is determined as and channel number ; Adjust the initial preset power of OBA to ;

[0045] ;

[0046] Adjust the output power of OA2 ~ OA3 ~...OAN~OPA to be consistent with the output power of OBA.

[0047] 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 plurality of 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, so as to maintain stable performance, thereby ensuring that the first-band signal and the second-band signal can be transmitted reliably.

[0048] Reference Figure 4 , Figure 4 This is a flow chart of the third exemplary embodiment of the power regulation method of this application. Figure 1In the embodiment shown, 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. 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: Step S410, obtaining 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; Specifically, targeted compensation is performed for the effects between the SRS bands of each span by correcting the fiber-input OA of the C-band and L-band of each span. , then, the loss difference between C-band and L-band in a given transmission span is obtained.

[0049] Step S420, calculating the first fiber input power and the first fiber output power, calculating the second fiber input power and the second fiber output power, to obtain a first power loss and a second power loss respectively; Step S430, combining the first power loss and the second power loss to obtain the power loss difference; Specifically, since in the optical fiber communication system, the signal will experience power loss during the transmission process, that is, the reduction of signal strength, 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 the power 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, and the power of the second band signal entering the transmission span (second fiber input power) and the power leaving the transmission span (second fiber output power) can be obtained. The power loss of the second band in the transmission span (second power loss) can be obtained.

[0050] Step S440, 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 obtaining a first expected power and a second expected power; Specifically, in order to ensure that the signal power in the system is within the expected range to maintain the communication performance, the first preset power and the second preset power and the obtained power loss difference can be combined to determine the expected power for guiding the elimination of the power loss difference.

[0051] 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 of each span.

[0052] Step S450, combining the first expected power, the first fiber input power and the first fiber output power, 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.

[0053] Specifically, in order to further adjust the output power of the amplifier to ensure that the signal is maintained at 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 further combining the expected power, the fiber input power and the fiber output power. The power adjustment amount is used to adjust the output power of the amplifier.

[0054] Exemplarily, targeted compensation is performed for the effects between the SRS bands of each span. The gains of OBA and ONA are adjusted to increase the C-band output power and reduce the L-band output power. That is, it can be understood that the expected output power of the first OA-C band of the span = the preset output power + γ*(total loss of the C-band span - total loss of the L-band span); the expected output power of the first OA-L band of the span = the preset output power - γ*(total loss of the C-band span - total loss of the L-band span); single gain adjustment amount = expected output power - current output power.

[0055] Furthermore, in step S140, when the target power adjustment amount does not meet the preset first threshold value, adjusting the output power of the plurality of amplifier groups to compensate for the power loss difference includes: Step A460, when the target power adjustment amount does not meet the preset first threshold value, adjusting the output power of the amplifiers in the plurality of amplifier groups for transmitting 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 for transmitting the second band signal according to the second power adjustment amount to update the second power loss; Specifically, the first power loss is the power loss of the first band on the transmission span, and the second power loss is the power loss of the second band on the transmission span.

[0056] Step A470, combining the updated first power loss and the updated second power loss to compensate for the power loss difference.

[0057] Specifically, the power loss difference can be used as a parameter to describe the power difference between the two band signals. By adjusting the output power of the amplifier according to the first and second power adjustment amounts, it is possible to iteratively adjust the power of the first band signal and the second band signal, thereby compensating for the SRS transfer between the first band signal and the second band signal, and ensuring that the power of the band signal in the entire communication link is maintained at an ideal level to avoid signal loss or signal-to-noise ratio degradation, so that the power of the band is balanced within an appropriate range.

[0058] This embodiment adopts the above scheme, specifically by calculating the target power adjustment amount according to the power queried by OA and the initial preset power, thereby ensuring that the power of the first band and the second band signals during the transmission process remains within the expected range, which can effectively maintain the signal quality and performance; in addition, by continuously monitoring and iteratively updating the power of the band signal, the C+L multi-band broadband transmission system can maintain the stability and reliability of the signal.

[0059] Reference Figure 5 , Figure 5 This is a flow chart of the fourth exemplary embodiment of the power regulation method of this application. Figure 1 In the embodiment shown, 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 an amplifier in the plurality of amplifier groups for transmitting the first band signal and a second downlink slope of an amplifier for transmitting the second band signal. Step S140, based on the total spectrum slope and the downlink total slope, determines a target expected slope and a target slope adjustment amount corresponding to the target expected slope, including: Step S510, calculating the first spectrum slope and the first sent slope, and calculating 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; Specifically, the first spectral slope is the spectral slope of the first band signal, the first downlink slope is the actual downlink slope used to transmit the first band signal in the amplifier group, and 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 to transmit the second band signal in the amplifier group. In order to obtain the change in the spectrum characteristics of the band signal in the transmission span, by calculating the difference between the first spectral slope and the first downlink slope and the second spectral slope and the second downlink slope, the difference between the first and last slopes across the transmission span of the first band and the difference between the first and last slopes across the transmission span of the second band can be obtained.

[0060] Step S520, 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 obtaining a first transfer slope of the first band signal and a second transfer slope of the second band signal; Specifically, the transfer slope within a band refers to the relationship between the power of an optical signal and the frequency within a specific frequency range. It can be expressed as the rate of change of power to frequency, usually in units of dB / GHz or dB / nm. The transfer slope describes how the power of an optical signal changes with frequency within a band.

[0061] 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 waveband, and the fourth spectral slope corresponds to the second waveband; Step S540, 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, to obtain a first expected slope and a second expected slope respectively; Specifically, in order to calibrate or optimize the band signal, the expected slope can be calculated by combining the transfer slope, a preset matching coefficient, and the spectral slope monitored by the end optical amplifier (OPA).

[0062] Among them, 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 can be equal to or different from the first matching coefficient.

[0063] Step S550: Combine the first sent slope and the first expected slope, and combine the second sent slope and the second expected slope to obtain a first slope adjustment amount and a second slope adjustment amount, respectively.

[0064] Specifically, in order 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, and the slope adjustment amount is used to adjust the slope of the amplifier to ensure that the spectrum characteristics of signals of different wavelengths are kept stable during transmission.

[0065] 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 OA initial slope is 0, and the transmitting end slope ratio coefficient is ( );

[0066] In each iteration, the slope adjustment process of the power optimization algorithm mainly updates the slope of each OA according to the monitoring status of the current link, leveling the slope of the link receiving end while ensuring the balance between the flatness of the OSNR of the entire link and the nonlinear cost.

[0067] The SRS transfer slope of the first transmission span optical fiber can be obtained by measuring the signal slope monitored by the OA OUT monitoring port of each span, subtracting the difference between the monitoring slopes of the first and last OAs of the span and the slope of the OA sent at the tail end from the slope of the OA sent at the tail end. The single slope adjustment amount = the expected adjustment slope - the current sent slope. When the slope adjustment amount does not meet the second threshold, the difference between the expected adjustment slope and the actual sent slope is used as the iterative update value (that is, the new slope adjustment amount). Similarly, the slope adjustment amount of each level of OA is calculated according to the output slopes of each OLA site and the front OPM and rear OPM, and the adjustment amount is allocated to OBA~OA2~OA3~...OAN~OPA, and the slope adjustment is completed.

[0068] Further, 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: Step A560: When the target slope adjustment amount does not meet the preset second threshold value, 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; Step A570: adjusting the slope 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 slope of the amplifiers in the plurality of amplifier groups for transmitting the second band signal according to the second slope adjustment amount.

[0069] Specifically, when the slope adjustment amount does not meet the second threshold, in order to realize 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 sent slope is used as the new first slope adjustment amount, that is, the difference between the expected adjustment slope and the actual sent slope is used as the iterative update value (that is, the new first slope adjustment amount), so that the system can perform adaptive slope adjustment according to the first slope adjustment amount to ensure that the first band signal maintains consistency and stability during transmission, and finally obtains a flat power output result. The same is true for the second band signal.

[0070] This embodiment adopts the above scheme, specifically by combining the spectral slope and the downward slope, to calculate the difference in the cross-segment head-to-tail slope caused by the SPS transfer, obtains the transfer slope according to the cross-segment head-to-tail 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, and then obtains the expected adjustment amount for adjusting the slope according to the expected slope and the downward slope, 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.

[0071] Reference Figure 6 , Figure 6 The flowchart of the fifth exemplary embodiment of the power regulation method of the present application is as follows. Based on any one of the first to fourth embodiments above, the post-amplifier group is provided with an optical monitor, and step S230 monitors the total slope of the fiber input spectrum of the transmission span, including: Step S610, respectively obtaining a wavelength or frequency at the center of the first band signal, a wavelength or frequency at the center of the second band signal, and a total power of the first band signal and the second band signal; Specifically, the slope of OLA is predicted based on the slope monitoring algorithm of the existing monitoring points. A signal slope can be directly fitted using the total power of the C-band and L-band obtained by querying the power monitoring point of each OA and the central wavelength or central frequency of the two bands.

[0072] 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; Specifically, since the fitted signal slope is affected by the inter-band power transfer caused by SRS, wavelength-related loss, the difference in insertion loss between C-band and L-band devices (such as broadband optical multiplexing / demultiplexing boards (OBM)), and the difference in OA power calibration error, there is a certain loss in accuracy. However, since the model is directly fitted using the power points monitored by OA, there is no cascade error propagation and no need for self-calibration. It is still possible to be applicable to the power optimization algorithm in the scenario where the OBM insertion loss can be calibrated or estimated.

[0073] Step S630: Combining the spectrum slope detected by the light monitor and the fitted total slope, the first waveband signal and the second waveband signal are compensated according to a preset ratio to obtain the first spectrum slope and the second spectrum slope.

[0074] Specifically, based on this simplified model, only one slope value can be obtained, namely, the total slope of the C and L bands. In order to distinguish the slopes of the C band and the L band, when adjusting the slope, the total fitting slope and the monitoring slope of the optical performance monitoring (OPM) at the receiving end can be combined to obtain a total spectrum slope, and then the slopes of C and L can be compensated according to the preset ratio to obtain the first spectrum slope and the second spectrum slope.

[0075] This embodiment adopts the above scheme, specifically by acquiring the total slope of the first band signal and the second band signal, and combining it with the slope monitored by the OPM power monitoring device at the receiving end (end), to compensate the spectral slope according to the ratio, so as 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.

[0076] Reference Figure 7 , Figure 7 The flowchart of the sixth exemplary embodiment of the power regulation method of the present application is shown in FIG. Based on any one of the first to fourth embodiments shown above, each of the line amplifier groups in the plurality of amplifier groups is configured with at least one sideband filter module, and the sideband filter module includes a sideband filter device and a signal monitoring device. Step S230 monitors the total slope of the fiber input spectrum of the transmission span, including: Step S710, 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; Specifically, the function of spectral slope monitoring is added to each OLA site of the C+L system, and the signal additional slope of each span can be calculated according to the slope monitoring value matching of each OLA site. The monitoring means can be an optical performance monitoring board (OPM) or a slope monitoring solution based on a low-cost passive filter device in the embodiment of the present application.

[0077] 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; Step S730: Fitting the optical channel total powers and center frequencies of the first sub-band groups and fitting the optical channel total powers and center frequencies of the second sub-band groups to obtain the first spectral slope and the second spectral slope respectively.

[0078] The main function of sideband filtering is to filter the spectrum of the signal 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 the number of sub-bands, the lower the cost. The function of the sideband filter device to achieve slope monitoring is to utilize the full-wave transmission condition under the fill wave architecture of the C+L band. 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 power of the optical channel within it. The power of each sub-band and its corresponding center frequency can be used to fit a spectrum slope.

[0079] More specifically, refer to Figure 8 , Figure 8 The schematic diagram of the sideband filter device design for the power regulation method of this application is shown in Figure 1. The sideband filter device can be packaged into a small pluggable module (SFP) or a single board, and a 1x2 optical switch is used to realize the monitoring and sharing of the bidirectional link of the OLA site. After power collection, the single board performs slope fitting calculation and slope reporting. Considering that the OLA site generally only needs to monitor bidirectional services, if the device volume is relatively large, it can be packaged into a single board, which is expected to occupy only half a slot.

[0080] 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.

[0081] Reference Fig. 9 , Fig. 9 This is a flow chart of the seventh exemplary embodiment of the power regulation method of the present application. Figure 1 In the embodiment shown, 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 downlink slope, further includes: 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; Step S920: Based on the power output flatness result, a channel-level strategy is adopted to adjust the power of the plurality of channels.

[0082] Specifically, when the target power adjustment amount meets the first threshold value and the target slope adjustment amount meets the second threshold value, a flat power output result can be obtained, which means that the signal power has been adjusted to a suitable level and the spectrum characteristics of the signal have also been corrected.

[0083] In addition, since there are usually multiple channels in a C+L multi-band broadband transmission system, each channel may have a different wavelength or frequency, when obtaining a flat power output result, a channel-level strategy can be used to further adjust the power of several channels. Among them, the embodiment of the present application uses WSS to fine-tune the power of each channel to achieve overall or partial power adjustment of several channels to ensure that they have consistent performance in the entire communication system.

[0084] This embodiment uses the above scheme, specifically by realizing signal power balance and spectrum characteristic correction in the C+L multi-band broadband transmission system, so that the post-amplifier group can output a relatively flat spectrum, and then adopts a channel-level strategy to fine-tune the power of several channels in different transmission links to ensure the stability and performance of the entire system.

[0085] Reference Fig.10 , Fig.10 The flowchart of the eighth exemplary embodiment of the power regulation method of the present application is shown in FIG. Based on the first to seventh embodiments above, the specific implementation steps of the power regulation method of the improved C+L system may include: First, when the station is opened, the initial value of OBA in the broadband transmission system is set, the fill wave is added, and the transmitting end is leveled; 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; wherein the power difference between the OBA-OLA-OPA is △P1, and the threshold corresponding to △P1 is a1; 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; Then, the SRS transfer within each span is placed on the OA of each span for matching compensation; wherein the SRS transfer within the band is △S, and the threshold value corresponding to △S is a3; Determine whether △P1 is less than or equal to a1 and whether △P2 is less than or equal to a2 and whether △S is less than or equal to a3; 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 flatness result is obtained, and channel-level APO is performed to fine-tune the power of each channel through WSS; 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 △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.

[0086] As such, 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.

[0087] In terms of performance, for engineering links with significant differences in SRS transfer amounts, the OSNR after end-to-end transmission of single multiplexing section and multi-multiplexing section engineering cases using the new C+L system power optimization algorithm has been improved. In terms of operation and maintenance efficiency, the new C+L system power optimization algorithm can significantly reduce the number of slope iterations in the operation and maintenance scenario of optical path maintenance, or limit the slope adjustment to the first and last OAs of the span with span loss changes; at the same time, for the OMS protection scenario with non-redundant OA, the new C+L system power optimization algorithm can also ensure that the optical path of the backup path is maintained more completely, so that the performance of the backup path is further guaranteed.

[0088] In addition, an embodiment of the present application further provides a power regulation 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.

[0089] Specifically, refer to Figure 2 , Figure 2 The schematic diagram of the power optimization algorithm monitoring and adjustment of the broadband transmission system in the power regulation method of the present application is shown in FIG. 1 , wherein the broadband transmission system includes a preamplifier group, a line amplifier group, and a post-amplifier group. The line amplifier group includes one or more groups. The preamplifier group and the post-amplifier group are respectively provided with an OPM. The line amplifier group is provided with Figure 8 The slope monitoring point at the OUT port of the sideband filter device shown is used to convert the slope of each span of optical fiber.

[0090] Furthermore, 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 further used to fit the total optical channel power and center frequency of the first sub-band groups, and to 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.

[0091] Specifically, refer to Figure 8 The sideband filter device can be packaged into a small pluggable module (SFP) or a single board, and a 1x2 optical switch is used to monitor and share the bidirectional link of the OLA site. After power collection, the single board performs slope fitting calculation and slope reporting. Considering that the OLA site generally only needs to monitor bidirectional services, if the device is larger, it can also be packaged into a single board, which is expected to occupy only half a slot.

[0092] For the principle and implementation process of realizing power regulation in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0093] In addition, the present application also provides a terminal device, such as Fig.11 As shown, the terminal device includes a memory 802, a processor 801, and a power regulation program stored in the memory and executable on the processor. When the power regulation program is executed by the processor, the steps of the power regulation method described above are implemented.

[0094] Since all the technical solutions of all the aforementioned embodiments are adopted when the power regulation program is 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.

[0095] In addition, an embodiment of the present application further proposes 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.

[0096] Since all the technical solutions of all the aforementioned embodiments are adopted when the power regulation program is 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.

[0097] 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.

[0098] 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 to achieve the purpose of improving power flatness; in addition, since the SRS effect causes changes in power transfer, the power adjustment is continuously iterated to converge to the ideal state, which can effectively improve the technical problem of unbalanced 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.

[0099] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0100] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0101] 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 a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, 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 above, and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, a controlled terminal, or a network device, etc.) to execute the method of each embodiment of the present application.

[0102] The above are only preferred 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 further used to fit the total optical channel power and center frequency of the first sub-band groups, and to 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.

12. A terminal device, characterized in that: The terminal device includes a memory, a processor, and a power regulation program stored in the memory and executable on the processor. When the power regulation program is executed by the processor, the steps of the power regulation method as described in any one of claims 1 to 9 are implemented.

13. A computer-readable storage medium, characterized in that: 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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