WO2023155499A1

WO2023155499A1 - Channel power control method for optical network, control device and storage medium

Info

Publication number: WO2023155499A1
Application number: PCT/CN2022/131307
Authority: WO
Inventors: 李俊楠; 刘杨广
Original assignee: 中兴通讯股份有限公司
Priority date: 2022-02-16
Filing date: 2022-11-11
Publication date: 2023-08-24
Also published as: CN116647276A

Abstract

A channel power control method for an optical network, a control device and a storage medium. The optical network comprises an upstream station and a downstream station which are adjacent, the upstream station comprises an upstream main optical power amplifier, and the downstream station comprises a downstream main optical power amplifier connected to the upstream main optical power amplifier across network segments. The method comprises: for each optical channel of the upstream main optical power amplifier, modulating an optical wavelength signal in the optical channel according to a preset detection signal (S100); acquiring a first in-fiber light power of the optical channel according to the modulated optical wavelength signal (S200); acquiring a first out-fiber light power of each optical channel of the downstream main optical power amplifier (S300); and performing power control on the optical channel according to a difference value between the first out-fiber light power and the first in-fiber light power, and a first preset power offset threshold (S400).

Description

Optical network channel power control method, control device and storage medium

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202210141731.2 and a filing date of February 16, 2022, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The embodiments of the present application relate to the technical field of optical networks, and in particular, to a method for controlling channel power of an optical network, a control device, and a computer-readable storage medium.

Background technique

With the continuous evolution of communication technology, the amount of information transmission is increasing, and the wavelength division multiplexing network has been greatly developed. When the wavelength division multiplexing network is running, it is necessary to ensure that the optical power of each channel maintains the power budget at the time of design, so as to ensure that the receiving end can work normally. However, in some wavelength division multiplexing networks with long transmission distances, due to the nonlinear effect of optical fibers, the short-wavelength power transfers to long-wavelength power, and the influence of the pumping capability of the power amplifier itself, resulting in the optical power of each channel unbalanced.

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

Embodiments of the present application provide a method for controlling channel power of an optical network, a control device, and a computer-readable storage medium.

In the first aspect, the embodiment of the present application provides a channel power control method of an optical network, the upstream site includes an upstream main optical power amplifier set at the fiber inlet of the upstream site, and the downstream site includes an upstream main optical power amplifier set at the The downstream main optical power amplifier at the fiber outlet of the downstream site, the upstream main optical power amplifier is connected to the downstream main optical power amplifier across a section, and the method includes: for each optical channel of the upstream main optical power amplifier, The optical wavelength signal in the optical channel is modulated according to a preset detection signal, wherein the preset detection signal is not correlated with the optical wavelength signal, and the frequency of the preset detection signal is lower than that of the optical wavelength signal The minimum frequency of the service frequency band; according to the modulated optical wavelength signal, obtain the first fiber-in optical power of each of the optical channels of the upstream main optical power amplifier; obtain each of the downstream main optical power amplifiers The first output optical power of the optical channel; for each of the optical channels, power control is performed on the optical channel according to the first power difference and the first preset power offset threshold, and the first power difference The value is the first fiber output power minus the first fiber input power.

In the second aspect, the embodiment of the present application also provides a control device, including: a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, the above The channel power control method of the optical network described in the first aspect.

In a third aspect, the embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, the computer-executable instructions being used to execute the channel power control method for an optical network as described in the first aspect above.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description, claims as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

Fig. 1 is the flowchart of the channel power control method of the optical network provided by one embodiment of the present application;

FIG. 2 is a flow chart of modulating an optical wavelength signal in an optical channel in a channel power control method of an optical network provided by an embodiment of the present application;

Fig. 3 is a flow chart of obtaining the first fiber-in optical power of each optical channel of the upstream main optical power amplifier in the channel power control method of the optical network provided by an embodiment of the present application;

FIG. 4 is a flow chart of power control for an optical channel in a channel power control method for an optical network provided by an embodiment of the present application;

FIG. 5 is a flow chart of performing power attenuation control on an optical channel in a channel power control method for an optical network provided in another embodiment of the present application;

FIG. 6 is a schematic diagram of an optical network provided by an embodiment of the present application;

Fig. 7 is a schematic diagram of an optical network provided by another embodiment of the present application;

FIG. 8 is a flow chart after performing power attenuation control on an optical channel in a channel power control method for an optical network provided by an embodiment of the present application;

FIG. 9 is a flow chart of determining a second power difference in a channel power control method of an optical network provided by an embodiment of the present application;

FIG. 10 is a flow chart of power control for an optical channel in a channel power control method for an optical network provided in another embodiment of the present application;

FIG. 11 is a flow chart of a channel power control method for an optical network provided in another embodiment of the present application;

Fig. 12 is a schematic diagram of a control device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be noted that although the functional modules are divided in the schematic diagram of the device, and the logical sequence is shown in the flowchart, in some cases, it can be executed in a different order than the module division in the device or the flowchart in the flowchart. steps shown or described. The terms "first", "second" and the like in the specification and claims and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.

The present application provides a channel power control method of an optical network, a control device, and a computer-readable storage medium. In the case of the output optical power of the optical channel of the power amplifier, the optical power difference between the two can be obtained, that is, the span power offset can be determined, and then the span power offset and the preset power offset can be determined. The comparison is made by shifting the threshold to realize the power control of the optical channel. Since the channel power control is performed for each optical channel, the cross-segment power offset of each optical channel can be optimized as a whole, and the transmission process of each optical channel can be realized. The optical power in the optical channel is balanced, and when detecting the first optical power of the optical channel, by modulating the optical wavelength signal in the optical channel at a relatively low frequency and irrelevant preset detection signal, not only can reduce the detection of the first optical fiber The deployment cost of optical power can also improve the overall power detection efficiency of the optical channel.

The embodiments of the present application will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, Figure 1 is a flow chart of a channel power control method for an optical network provided by an embodiment of the present application, wherein the optical network includes adjacent upstream sites and downstream sites, and the upstream site includes an input fiber set at the upstream site The upstream main optical power amplifier at the downstream site includes the downstream main optical power amplifier arranged at the fiber outlet of the downstream site, and the upstream main optical power amplifier is connected to the downstream main optical power amplifier across sections. The channel power control method of the optical network includes but It is not limited to steps S100 to S400.

Step S100, for each optical channel of the upstream main optical power amplifier, modulate the optical wavelength signal in the optical channel according to the preset detection signal, wherein the preset detection signal is not related to the optical wavelength signal, and the frequency of the preset detection signal is Less than the minimum frequency of the business frequency band in the optical wavelength signal.

In one embodiment, since the preset detection signal is not correlated with the optical wavelength signal, it can be modulated based on the preset detection signal to match the optical wavelength signal in the optical channel. During the modulation process, since the frequency of the preset detection signal is less than The minimum frequency of the service frequency band in the optical wavelength signal, that is, the preset detection signal is low-frequency modulation relative to the service frequency band in the optical wavelength signal, so the preset detection signal will not have a negative impact on the actual service function of the optical wavelength signal, and can It is ensured that the optical wavelength signal can be normally transmitted while being modulated based on the preset detection signal.

It can be understood that the "service frequency band" refers to the relevant frequency band in the optical wavelength signal corresponding to the normal service function. Correspondingly, the "idle frequency band" in the following embodiments refers to the corresponding Relevant frequency bands for business functions.

In the example of FIG. 2 , step S100 includes but not limited to steps S110 to S120.

Step S110: Determine the idle frequency band of the optical wavelength signal from the optical wavelength signal in the optical channel;

Step S120: Modulate the idle frequency band in the optical wavelength signal according to the preset detection signal.

In an embodiment, during the modulation process, since the idle frequency band in the optical wavelength signal will not specifically perform related service functions, the modulation of the idle frequency band in the optical wavelength signal according to the preset detection signal will not affect the optical wavelength signal. The actual service function of the signal is adversely affected, which can ensure that the optical wavelength signal can be normally transmitted while being modulated based on the preset detection signal.

It can be understood that setting the frequency of the preset detection signal to be lower than the minimum frequency of the idle frequency band in the optical wavelength signal can further reduce the influence of the preset detection signal on the detection of the optical wavelength signal.

Step S200: Obtain the first fiber-introduced optical power of each optical channel of the upstream main optical power amplifier according to the modulated optical wavelength signal.

In one embodiment, by obtaining the first optical power of each optical channel of the upstream main optical power amplifier through the modulated optical wavelength signal, the optical power of each optical channel at the fiber input of the upstream site can be known, Since optical signals experience nonlinear effects during optical fiber transmission, the optical power of waves with shorter wavelengths is easily transferred to the optical power of waves with longer wavelengths. Therefore, by knowing the optical power of each optical channel at the upstream site The optical power situation is beneficial to further deduce the optical power span offset of the optical channel.

It can be understood that since the optical network includes adjacent upstream sites and downstream sites, and the upstream main optical power amplifier is set at the fiber entrance of the upstream site, and taking into account the influence of the power amplifier, the optical channel obtained from this site can be judged The accuracy of the first optical power into the fiber is relatively high, and the error is relatively small.

It should be noted that the optical network in this embodiment may be, but not limited to, a wavelength division multiplexing system, and its specific type is not specifically limited. For example, it may be a dense wavelength division multiplexing (Dense Wavelength Division Multiplexing, DWDM) optical transmission system, which may Reconfigurable Optical Add-Drop Multiplexer (Reconfigurable Optical Add-Drop Multiplexer, ROADM) system and Optical Add-Drop Multiplexer (Optical Add-Drop Multiplexer, OADM), etc., those skilled in the art can select and set according to actual application scenarios, This is not limited in this embodiment.

In the example of FIG. 3 , step S200 includes but not limited to steps S210 to S220.

Step S210: Extracting a preset detection signal from the modulated optical wavelength signal, where the preset detection signal carries signal characteristic information;

Step S220: According to the signal characteristic information carried by the preset detection signal, inverse detection is performed on the upstream main optical power amplifier to obtain the first fiber-entry optical power of the optical channel. In one embodiment, by modulating the preset detection signal into the optical wavelength signal, the preset detection signal and the optical wavelength signal are applied in the same environment for channel transmission, which is equivalent to combining the properties of the preset detection signal and the optical wavelength signal Similarity, and then when detection is required, by extracting the preset detection signal from the modulated optical wavelength signal, the first input corresponding to the optical wavelength signal can be directly calculated according to the evolution of the signal characteristic information carried by the preset detection signal. Fiber optic power does not need to use other auxiliary means for detection and acquisition, which is conducive to saving network deployment costs and improving power detection efficiency.

It can be understood that the signal characteristic information carried by the preset detection signal can be but not limited to specific parameters such as the power, modulation depth, frequency, and information period of the preset detection signal, and the feedback of the upstream main optical power amplifier based on the specific parameters The performance detection can be realized by a computer or a related algorithm, and in order to avoid redundancy, details are not described here.

Specific examples are given below to illustrate the working principles and processes of the above-mentioned embodiments.

Example one:

Before the main light in the optical multiplexing section, for the service channel of each service signal (that is, the optical wavelength signal), within its idle low frequency range, modulate a signal other than the service signal whose information period is T0 and frequency is fn with a limited modulation depth , and the low-frequency signal will not affect the current service signal; when detecting, for two adjacent stations on each link, use the modulated low-frequency signal as the detection unit of the upstream station to extract the low-frequency signal, and According to preset known information such as its power and modulation depth, invert the first input optical power Pb of the optical channel of the main optical power amplifier of the upstream site, and invert the input light of the optical channel of the main optical power amplifier of the upstream site For the power Pa, the specific inversion method can be specifically set by those skilled in the art according to the application scenario. Since this part of the content is well known to those skilled in the art, it will not be repeated here.

Step S300: Obtain the first output optical power of each optical channel of the downstream main optical power amplifier.

In one embodiment, by obtaining the first output optical power of each optical channel of the downstream main optical power amplifier respectively, the optical power of each optical channel at the fiber output of the downstream site can be known. During the process, it is easy to transfer the optical power of the wave with shorter wavelength to the optical power of the wave with longer wavelength due to the nonlinear effect. Further deduce the optical power span offset of the optical channel.

It can be understood that since the optical network includes adjacent upstream sites and downstream sites, and the downstream main optical power amplifier is set at the fiber outlet of the downstream site, and considering the influence of the power amplifier, the optical channel obtained from this site can be judged The accuracy rate of the first fiber output optical power is relatively high, and the error is relatively small.

Step S400: For each optical channel, perform power control on the optical channel according to the first power difference and the first preset power offset threshold, the first power difference is the first fiber output power minus the first fiber input power power.

In an embodiment, for each optical channel, when detecting the fiber-in optical power of the optical channel of the upstream main optical power amplifier and detecting the fiber-out optical power of the optical channel of the downstream main optical power amplifier, two The optical power difference between them, that is, the span power offset can be determined, and then the power control of the optical channel can be realized by comparing the span power offset with the preset power offset threshold, because for each All optical channels are controlled by channel power, so the cross-segment power offset of each optical channel can be optimized as a whole, and the optical power balance of each optical channel during transmission can be realized. In terms of power, by modulating the optical wavelength signal in the optical channel with a relatively low-frequency and irrelevant preset detection signal, it can not only reduce the deployment cost of detecting the first optical power into the fiber, but also improve the overall power detection efficiency of the optical channel.

It should be emphasized that channel optical power balance is an important part of optical power management. In related technologies, the power imbalance on the line is mainly caused by two reasons. The first point is the optical pumping ability of the power amplifier for different wavelengths. Different, the second point is that the optical signal undergoes a nonlinear effect during the optical fiber transmission process, which causes the optical power of the short-wavelength wave to be transferred to the optical power of the longer-wavelength wave. Therefore, this embodiment makes each channel of the system The optical power is kept balanced, and the existing optical path is dynamically optimized to meet the transmission requirements of the optical network. This is of great significance in practical applications, and based on the channel power control method of this embodiment, it can not only accurately compensate the unbalanced power of the optical path, It can also save a lot of device costs and time costs in terms of system maintenance and dynamic adjustment of system optical power.

In the example of FIG. 4, step S400 includes but is not limited to step S410.

Step S410: When the first power difference exceeds the first preset power offset threshold, perform power attenuation control on the optical channel.

In one embodiment, for each optical channel, if there is an optical channel whose first power difference exceeds the first preset power offset threshold, it indicates the power span offset of the optical channel between adjacent sites In this case, the balanced state cannot be reached. Therefore, by controlling the power attenuation of the optical channel to reduce the power span offset of the optical channel between adjacent sites, so that it meets the threshold limit requirements, Realize optical channel power balance.

It can be understood that the magnitude of the power attenuation control for the optical channel can be continuous, that is, the optical power is adjusted through the power attenuation control, and correspondingly, the first optical power of the input fiber and the first optical power of the first output fiber are also adjusted accordingly. , until the first power difference of the first fiber output power minus the first fiber input power does not exceed the first preset power offset threshold; in addition, if the first power difference is determined to be less than another preset lower side gate Similarly, it may be necessary to perform power compensation control on the optical channel, but this is only a possible situation, and it may actually be caused by other factors, which is not limited in this embodiment.

It should be noted that the first preset power offset threshold may be set according to specific link transmission conditions, which is not limited in this embodiment.

In the example of FIG. 5 , step S410 includes but not limited to steps S411 to S412.

Step S411: subtracting the first preset power offset threshold from the first power difference to obtain the power to be optimized;

Step S412: Control the actuator in the upstream site, and perform power attenuation control on the optical channel according to the power to be optimized.

In one embodiment, considering the optical power span offset scenario under normal conditions, only the part of the first power difference that exceeds the first preset power offset threshold, that is, the power to be optimized, is selected to be attenuated The control can reduce the influence of the attenuation control on the optical power of the normal part, and because attenuation control only needs to be performed on the power to be optimized instead of all the optical power, the efficiency of the attenuation control on the optical power can be improved.

It can be understood that the actuator can perform power attenuation control on the optical channel, and can also perform power compensation control on the optical channel; in different optical network transmission architectures, the actuators can be different, and specific examples will be given below for illustration .

In order to better illustrate the application scenario of the channel power control method for the optical network in the embodiment of the present application, an example description of the channel power control method in the case that the optical network is a ROADM system is given below.

Example two:

As shown in FIG. 6, FIG. 6 is a schematic diagram of an optical network provided by an embodiment of the present application.

In the example shown in Figure 6, the optical network is a ROADM system, and the actuator in the ROADM system is a wavelength selective switch, that is, a WSS, where there can be multiple WSSs in each ROADM system, and each WSS is used for the corresponding optical channel Power control, in this example, because only the main optical power is studied, so it can only focus on the WSS at the upstream main optical power amplifier of the upstream site; and, as can be seen from the example in Figure 6, the low-frequency signals are respectively There are two sections of detection, one section is the input end of the upstream main optical power amplifier, that is, the upstream main optical power amplifier is used as the upstream optical power detection point to obtain the input optical power Pa of the optical channel of the upstream main optical power amplifier of the upstream site, and the other section is The output end of the upstream main optical power amplifier, that is, taking the downstream main optical power amplifier as the downstream optical power detection point, is used to obtain the first fiber-entry optical power Pb of the optical channel of the main optical power amplifier of the upstream site, and at the same time through the optical channel monitoring module ( Optical Channel Monitor (OCM) detects the first output optical power Pd of each optical channel of the downstream main optical power amplifier, and thus the cross-segment power offset value Po=Pd-Pb can be obtained. In an example, if the calculated Po exceeds the preset threshold Pq, adjust the WSS in the upstream site so that it adjusts Po to within the range of the preset threshold according to the specific value of Po-Pq, so as to realize the optical channel Power balance control.

Example three:

As shown in FIG. 7 , FIG. 7 is a schematic diagram of an optical network provided by another embodiment of the present application.

In the example shown in Figure 7, two adjacent sites set up based on the UME platform include an upstream site and a downstream site, both of which are equipped with automatic power optimization devices (Automatic Power Optimization, APO), wherein the upstream The APO in the site can load low-frequency information from the modulated optical wavelength signal to detect the first fiber-entry optical power of the optical channel, and the APO in the downstream site can detect the downstream main optical power amplifier to obtain the optical power The optical power of the first outgoing fiber of the channel; and, APO can also control the WSS to perform power control, and associate with the main optical power amplifier of each site to play an overall control role.

In the example of FIG. 8 , steps S500 to S700 are also included after step S410 .

Step S500: For each optical channel of the upstream main optical power amplifier that has undergone power attenuation control, obtain the second fiber-in optical power of the optical channel;

Step S600: Determine the second power difference corresponding to the optical channel according to the second fiber-entry optical power;

Step S700: Perform power control on the optical channel according to the second power difference and the second preset power offset threshold.

In an embodiment, after the power attenuation control adjustment for each optical channel is completed, in order to verify whether the power attenuation control adjustment makes each optical channel achieve power balance, re-evaluation can be performed for each adjusted optical channel, that is, By acquiring the second fiber-entry optical power of the optical channel at this time, and determining the second power difference corresponding to the optical channel based on the second fiber-entry optical power, the second power difference and the second preset power offset The threshold performs power control on the optical channel. Compared with evaluating each optical channel before the power attenuation control is completed, this embodiment can re-evaluate each optical channel after adjustment to determine whether the attenuation adjustment of the optical channel is successful. And it meets the actual requirements, which is conducive to further improving the power balance control effect of the optical channel.

It can be understood that the second preset power offset threshold may be set according to specific link transmission conditions, which is not limited in this embodiment.

In the example of FIG. 9 , step S600 includes but not limited to steps S610 to S620.

Step S610: Obtain the input optical power of the optical channel and the gain of the upstream main optical power amplifier;

Step S620: Subtract the input optical power and the gain from the second input optical power to obtain a second power difference corresponding to the optical channel.

In an embodiment, the second power difference corresponding to the optical channel can be obtained by subtracting the input optical power Pa and the gain Ga from the second input optical power Pc, which is equivalent to determining the imbalance of the optical channel at the current detection point Optical power Pu, that is, Pu=Pc-Pa-Ga, that is, for the second optical power entering the fiber, except for the influence of the gain of the upstream main optical power amplifier, the second optical power entering the fiber is shifted relative to the span of the input optical power Part of it is the unbalanced optical power, and further analysis and control can be performed on the determined unbalanced optical power, so as to reduce its possible abnormal influence.

It should be noted that the gain of the upstream main optical power amplifier can usually be fixed, but the specific value is not limited, and can be selected and set according to the actual application scenario, which is not limited in this embodiment; the input optical power of the optical channel is obtained The manner of can also be obtained by detecting the modulated low-frequency signal, since it has been described in the above-mentioned embodiments, it will not be repeated here.

In the example of FIG. 10, step S700 includes but is not limited to step S710.

Step S710: When the second power difference exceeds the second preset power offset threshold, obtain the second fiber output optical power of the optical channel, and perform an optical channel based on the third power difference and the first preset power offset threshold. For power control, the third power difference is the second fiber output optical power minus the second fiber input optical power.

In one embodiment, the second preset power offset threshold is a threshold threshold corresponding to unbalanced optical power, which is different from the first preset power offset threshold. When the second power difference exceeds the second preset power offset threshold , it means that the state of the current optical channel has not been adjusted successfully, so the state of the optical channel needs to be readjusted. Based on the same method, by obtaining the second output optical power of the optical channel, and according to the third power difference and the first The preset power offset threshold controls the power of the optical channel, so as to realize the readjustment of the optical channel, and so on, until the current state of the optical channel meets the expectation. Through such a verification and supplementary control method, the optical channel can be further improved. Stability of power balance control.

It can be understood that if the second power difference does not exceed the second preset power offset threshold, it means that the current state of the optical channel meets expectations, and then enters the monitoring and observation period. During this period, supplementary However, based on the consideration of optimizing system performance, the corresponding detection interval can be extended appropriately to reduce the amount of messages sent in the transmission system. Correspondingly, if the second power difference is detected to exceed the second preset power deviation If you move the threshold, you can exit the monitoring and observation period, and still perform power balance control on the optical channel according to the above steps.

Specific examples are given below to illustrate the working principles and procedures of the above-mentioned embodiments.

Example four:

As shown in FIG. 11 , FIG. 11 is a flowchart of a channel power control method for an optical network provided in another embodiment of the present application.

In the example in Figure 11, follow the steps below to implement the overall process:

Step S800: In the optical wavelength signals of each optical channel, respectively modulate and load low-frequency signals;

Step S900: Query the optical channel power of each monitoring point based on the loaded low-frequency signal;

Step S1000: Calculate the corresponding power difference based on the monitored optical channel power;

Step S1100: Determine whether the power difference exceeds the threshold, if so, execute step S1200, otherwise execute step S1100;

Step S1200: maintain query optical channel power, and execute step S900;

Step S1300: adjusting the attenuation of the optical channel according to the actuator in the upstream site;

Step S1400: After the attenuation adjustment is completed, enter the monitoring and observation period, cyclically detect the unbalanced optical power, and gradually adjust the monitoring and observation period according to the monitoring situation.

It can be seen that through steps S800 to S1400, the cross-segment power offset of each optical channel can be optimized to realize the optical power balance of each optical channel during the transmission process, and at the same time, the stability of power balance control for the optical channel can be improved. .

In addition, referring to FIG. 12 , an embodiment of the present application also provides a control device 100 , the control device 100 includes: a memory 110 , a processor 120 and a computer program stored on the memory 110 and operable on the processor 120 .

The processor 120 and the memory 110 may be connected through a bus or in other ways.

The non-transitory software programs and instructions required to realize the channel power control method of the optical network of the above-mentioned embodiments are stored in the memory 110, and when executed by the processor 120, the channel power control method of the optical network of the above-mentioned embodiments is executed, For example, method steps S100 to S400 in Fig. 1 described above, method steps S110 to S120 in Fig. 2 , method steps S210 to S220 in Fig. 3 , method steps S410 in Fig. 4 , method steps in Fig. 5 are executed S411 to S412, method steps S500 to S700 in FIG. 8 , method steps S610 to S620 in FIG. 9 , method steps S710 in FIG. 10 , or method steps S800 to S1400 in FIG. 11 .

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, an embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by a processor or a controller, for example, by the above-mentioned Execution by a processor in the device embodiment can cause the above processor to execute the channel power control method of the optical network in the above embodiment, for example, execute the method steps S100 to S400 in FIG. 1 described above, and the method in FIG. 2 Steps S110 to S120, method steps S210 to S220 in FIG. 3 , method steps S410 in FIG. 4 , method steps S411 to S412 in FIG. 5 , method steps S500 to S700 in FIG. 8 , method steps S610 in FIG. 9 to S620, the method step S710 in FIG. 10 or the method steps S800 to S1400 in FIG. 11 .

Embodiments of the present application include a channel power control method for an optical network, wherein the optical network includes adjacent upstream sites and downstream sites, the upstream site includes an upstream main optical power amplifier, the downstream site includes a downstream main optical power amplifier, and the upstream main optical power amplifier A cross-section connection with the downstream main optical power amplifier, the method includes: for each optical channel of the upstream main optical power amplifier, modulating the optical wavelength signal in the optical channel according to the preset detection signal, wherein the preset detection signal is related to the optical wavelength The signals are not related, and the frequency of the preset detection signal is less than the minimum frequency of the service frequency band in the optical wavelength signal; according to the modulated optical wavelength signal, the first input optical power of each optical channel of the upstream main optical power amplifier is obtained; the downstream The first output optical power of each optical channel of the main optical power amplifier; for each optical channel, power control is performed on the optical channel according to the first power difference and the first preset power offset threshold, and the first power difference Subtract the first fiber-in optical power from the first fiber-out optical power. According to the solution provided by the embodiment of the present application, for each optical channel, in the case of detecting the fiber-entry optical power of the optical channel of the upstream main optical power amplifier and the detection of the output optical power of the optical channel of the downstream main optical power amplifier, The optical power difference between the two can be obtained, that is, the span power offset can be determined, and then the power control of the optical channel can be realized by comparing the span power offset with the preset power offset threshold. Channel power control is performed for each optical channel, so the cross-segment power offset of each optical channel can be optimized as a whole, and the optical power balance of each optical channel during transmission can be realized. When entering the optical power of the fiber, by modulating the optical wavelength signal in the optical channel with a relatively low-frequency and irrelevant preset detection signal, it can not only reduce the deployment cost of detecting the first optical power entering the fiber, but also improve the overall power of the optical channel detection efficiency.

Those skilled in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware and an appropriate combination thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. permanent, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embody computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

The above is a specific description of several implementations of the present application, but the application is not limited to the above-mentioned implementations, and those skilled in the art can also make various equivalent deformations or replacements without violating the essence of the application. Equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims

A channel power control method of an optical network, the optical network includes adjacent upstream sites and downstream sites, the upstream site includes an upstream main optical power amplifier arranged at the fiber inlet of the upstream site, and the downstream site includes The downstream main optical power amplifier arranged at the fiber outlet of the downstream site, the upstream main optical power amplifier is connected to the downstream main optical power amplifier across sections, and the method includes:

For each optical channel of the upstream main optical power amplifier, the optical wavelength signal in the optical channel is modulated according to a preset detection signal, wherein the preset detection signal is not correlated with the optical wavelength signal, so The frequency of the preset detection signal is less than the minimum frequency of the service frequency band in the optical wavelength signal;

Acquiring the first fiber-in optical power of each of the optical channels of the upstream main optical power amplifier according to the modulated optical wavelength signal;

Obtain the first output optical power of each of the optical channels of the downstream main optical power amplifier;

For each optical channel, perform power control on the optical channel according to a first power difference and a first preset power offset threshold, where the first power difference is the first output optical power minus The first fiber-in optical power.
The channel power control method of an optical network according to claim 1, wherein said modulating the optical wavelength signal in said optical channel according to a preset detection signal comprises:

determining an idle frequency band of the optical wavelength signal from the optical wavelength signal in the optical channel;

The idle frequency band in the optical wavelength signal is modulated according to the preset detection signal.
The channel power control method of an optical network according to claim 1, wherein the first fiber-entry optical power of each of the optical channels of the upstream main optical power amplifier is obtained according to the modulated optical wavelength signal ,include:

extracting the preset detection signal from the modulated optical wavelength signal, where the preset detection signal carries signal characteristic information;

According to the signal characteristic information carried by the preset detection signal, an inversion detection is performed on the upstream main optical power amplifier to obtain the first fiber-entry optical power of the optical channel.
The channel power control method of an optical network according to claim 1, wherein the power control of the optical channel according to the first power difference and the first preset power offset threshold comprises:

When the first power difference exceeds the first preset power offset threshold, perform power attenuation control on the optical channel.
The channel power control method of an optical network according to claim 4, wherein said performing power attenuation control on said optical channel comprises:

subtracting the first preset power offset threshold from the first power difference to obtain the power to be optimized;

An actuator in the upstream site is controlled to perform power attenuation control on the optical channel according to the power to be optimized.
The channel power control method of an optical network according to claim 4 or 5, wherein, after performing power attenuation control on the optical channel, further comprising:

For each of the optical channels of the upstream main optical power amplifier that has undergone power attenuation control, obtain the second fiber-in optical power of the optical channel;

determining a second power difference corresponding to the optical channel according to the second fiber-entry optical power;

Perform power control on the optical channel according to the second power difference and a second preset power offset threshold.
The channel power control method for an optical network according to claim 6, wherein said performing power control on said optical channel according to said second power difference and a second preset power offset threshold comprises:

When the second power difference exceeds the second preset power offset threshold, obtain the second output optical power of the optical channel, and compare the second power difference with the first preset power offset threshold The optical channel performs power control, and the third power difference is the second fiber output optical power minus the second fiber input optical power.
The channel power control method of an optical network according to claim 6, wherein said determining the second power difference corresponding to the optical channel according to the second fiber-entry optical power comprises:

Obtain the input optical power of the optical channel and the gain of the upstream main optical power amplifier;

Subtracting the input optical power and the gain from the second fiber-entry optical power to obtain a second power difference corresponding to the optical channel.
A control device, comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein, when the processor executes the computer program, any one of claims 1 to 8 is realized The channel power control method of the optical network.
A computer-readable storage medium storing computer-executable instructions, the computer-executable instructions being used to execute the channel power control method for an optical network according to any one of claims 1-8.