A method and device for automatic optical network power control, and storage medium

Abstract

The present application discloses an optical network power automatic control method and device, and a storage medium, wherein the optical network power automatic control method comprises: establishing a power management virtual path according to an optical fiber connection path; and performing a power management operation according to the power management virtual path. The solution provided by the embodiment of the present application realizes the optical network power automatic control.

Description

Technical Field

[0001] The embodiments of the present invention relate to, but are not limited to, an optical network power automatic control method and device, and a storage medium. Background Art

[0002] According to Shannon's channel capacity formula, the capacity of a disturbed continuous transmission channel is expressed as: The total channel capacity is affected by the channel bandwidth W and the channel signal-to-noise ratio S / N. At the limit, even if the channel bandwidth is increased, the channel capacity is only limited by the channel signal-to-noise ratio and has nothing to do with the channel bandwidth. In the case of white noise: Therefore, how to improve the signal-to-noise ratio of the channel in a high-speed optical transmission network is one of the most important issues in solving high-speed signal transmission. Among them, how to design and control the signal power and noise power in the optical transmission network is the key factor in solving this issue. Under the same noise conditions, the higher the signal power, the better the signal-to-noise ratio of the system.

[0003] When designing the signal power in an optical transmission network, the general design idea is to first determine the receiving sensitivity of the signal receiver, that is, the minimum power that the receiver needs to use to achieve effective signal reception. Then, the transmission power of the transmitter is set based on the power loss and power cost of the system. In simple terms, the target power of the transmitter is defined as:

[0004] P det =P rec +C l +M s (1-1)

[0005] Where Prec is the receiver sensitivity power, Cl is the system line loss, and Ms is the system margin. Receiver sensitivity is relatively easy to control. Equipment manufacturers can ensure receiver sensitivity by presetting this quantity, using professional production or finding professional chip suppliers. Receiver sensitivity is relatively stable in the long term and will not change significantly before the device ages. However, system line loss often changes greatly, and even with effective design, the actual network construction may not be consistent with expectations. In addition, during network operation, changes in the external environment and natural aging of optical fibers will also cause optical fiber losses to differ significantly from expectations. In particular, the optical power between different services in the system will also affect each other. After adding new services to the system, the power of short-wavelength services will shift to long-wavelength services, and the power value of services that have been adjusted in place will change due to the addition or deletion of new services. The power level of each point in the network needs to be considered in various factors, and the dynamic maintenance process is also extremely complicated. Related technologies can no longer meet actual usage needs and are in urgent need of improvement. Summary of the invention

[0006] At least one embodiment of the present invention provides an optical network power automatic control method and device, system, and storage medium to adapt to changes in network environment.

[0007] At least one embodiment of the present application provides an optical network power automatic control method, including:

[0008] Establishing a power management virtual path according to the optical fiber connection path;

[0009] Power management operations are performed according to the power management virtual path.

[0010] At least one embodiment of the present application provides an optical network power automatic control device, including a memory and a processor, wherein the memory stores a program, and when the program is read and executed by the processor, the optical network power automatic control method described in any embodiment is implemented.

[0011] At least one embodiment of the present application provides a computer-readable storage medium, which stores one or more programs. The one or more programs can be executed by one or more processors to implement the optical network power automatic control method described in any embodiment.

[0012] Compared with the related art, an embodiment of the present invention provides an optical network power automatic control method, comprising: establishing a power management virtual path according to an optical fiber connection path; and performing a power management operation according to the power management virtual path. The solution provided by this embodiment can solve the problem of abnormally complex dynamic maintenance in an optical network system due to external environmental changes, natural aging of optical fibers, and mutual influence of multiple wavelength powers, and realize the automatic control function of the optical network power.

[0013] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0015] Figure 1 A flow chart of an optical network power automatic control method provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the composition of a control unit provided in one embodiment of the present invention;

[0017] Figure 3A schematic diagram of an optical network provided in accordance with an embodiment of the present invention;

[0018] Figure 4 A schematic diagram of an optical network provided in another embodiment of the present invention;

[0019] Figure 5 A schematic diagram of an optical network power automatic control device provided by an embodiment of the present invention;

[0020] Figure 6 A block diagram of a computer-readable storage medium provided for an embodiment of the present invention;

[0021] Figure 7 A block diagram of an optical network power automatic control system provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0023] The steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions. Also, although a logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a sequence different from that shown here.

[0024] An embodiment of the present invention provides an optical network power automatic control method, which aims to solve the problem of extremely complex system dynamic maintenance caused by external environment changes, natural aging of optical fibers and mutual influence of multiple wavelength powers in an optical network system.

[0025] In addition, although the related art can realize automatic control of the optical power and main optical power of each node in the optical network system, it still cannot automatically open the new service according to the actual characteristics and line conditions when the system is expanded, and it cannot guarantee the normal transmission of the existing service when the new service is opened. An embodiment of the present invention provides a solution to solve the problem that the new service cannot be automatically opened according to the actual characteristics and line conditions when the existing system is expanded, and realizes the automatic control function of the optical network power.

[0026] like Figure 1 As shown, an embodiment of the present invention provides an optical network power automatic control method, comprising:

[0027] Step 101, establishing a power management virtual path according to the optical fiber connection path;

[0028] Specifically, the optical fiber connection path is abstracted and a power management virtual path is established.

[0029] Step 102: Perform a power management operation according to the power management virtual path.

[0030] The abstraction of the optical fiber connection path includes abstracting the optical add / drop nodes on the optical fiber connection path, establishing a first type of control unit to perform power control on the absolute power of the optical add / drop nodes, and abstracting the sub-paths on the optical fiber connection path, establishing a second type of control unit to control the relative power of the sub-paths. Wherein, a sub-path is, for example, a multiplexing segment between two adjacent optical add / drop nodes on the optical fiber connection path. In one embodiment, the power management virtual path includes at least one of the following: a first type of control unit and a second type of control unit; wherein, the first type of control unit is used to perform power control on a single wavelength signal on an optical transmission path according to an absolute power target; specifically, the first type of control unit is used to control the power of a single wavelength optical signal of an optical add / drop node on the optical fiber connection path, and performs power control according to the absolute power target during the power control process. The optical add / drop node is, for example, an OADM (Optical Add-Drop Multiplexer). It should be noted that a first type of control unit can be established for each single wavelength optical signal, or a first type of control unit can be established for multiple single wavelength optical signals.

[0031] The second type of control unit is used to perform power control on the multi-wavelength signal on the optical transmission path according to the relative power target; specifically, the second type of control unit is used to perform power control on the multiplexing segment (or span segment) on the optical fiber connection path according to the relative power target, wherein the path between adjacent optical add / drop nodes on the optical fiber connection path is regarded as a multiplexing segment. It should be noted that a second type of control unit can be created for each multiplexing segment, and only one second type of control unit can be created for multiple span segments, and this is not limited in this application.

[0032] The absolute power target refers to controlling the power of a single wavelength optical signal to be a fixed power. For example, controlling the power of a single wavelength signal at each OADM node to be a fixed power. The fixed power can be set as required, for example, according to transmission requirements.

[0033] In one embodiment, the first type of control unit performs power control according to the absolute power target during the power control process, including: determining the absolute power target according to the information of the transmitted single-wavelength optical signal, and controlling the optical power of the single-wavelength optical signal at the optical add / drop node to reach the absolute power target. The information of the single-wavelength optical signal includes but is not limited to the center frequency, modulation code type, bandwidth, and transmission optical fiber type of the single-wavelength optical signal.

[0034] In one embodiment, the absolute power target includes: the target fiber-input optical power of the single-wavelength optical signal in the OADM; it should be noted that OADM is only an example, and if there are other devices serving as optical add / drop nodes in the optical network, the target fiber-input optical power of the device may also be used.

[0035] In one embodiment, the second type of control unit is used to perform power control on the multiplex section on the optical fiber connection path according to the relative power target, including: for any multiplex section, controlling the difference between the input power and the output power of the multiplex section to reach the relative power target, that is, the difference remains unchanged or meets a preset threshold. In this embodiment, relative power control is used, the control logic is simple, and the complexity of power control is reduced.

[0036] In one embodiment, controlling the optical power of the single-wavelength optical signal at the optical add / drop node to reach the absolute power target includes: periodically performing the following operations: obtaining the current fiber-input optical power of the single-wavelength optical signal at the optical add / drop node, and if the deviation between the current fiber-input optical power and the target fiber-input optical power meets a preset condition, adjusting the fiber-input optical power of the single-wavelength optical signal at the optical add / drop node to reach the target fiber-input optical power.

[0037] In one embodiment, controlling the difference between the input power and the output power of the multiplex section to reach the relative power target is achieved by:

[0038] According to the input power of the upstream optical amplifier node of the multiplexing section, the output power of the downstream optical amplifier node, the attenuation value and gain value of the upstream optical amplifier node, and the attenuation value and gain value of the downstream optical amplifier node, the target attenuation value and target gain value of the upstream optical amplifier node and the downstream optical amplifier node of the multiplexing section are determined; the attenuation value of the upstream optical amplifier node and the downstream optical amplifier node of the multiplexing section are adjusted to the target attenuation value, and the gain value of the upstream optical amplifier node and the downstream optical amplifier node of the multiplexing section is adjusted to the target gain value. It should be noted that a deviation range can be set. If the difference between the current attenuation value and the target attenuation value is within the deviation range, the attenuation value is not adjusted. If the difference between the current gain value and the target gain value is within the deviation range, the gain value is not adjusted. The attenuation value and the gain value can be set with different deviation ranges, or the same deviation range can be set. Similarly, the aforementioned absolute power control can also be set with a deviation range. When the difference between the input fiber optical power and the target input fiber optical power is within the preset deviation range, no adjustment is made.

[0039] In one embodiment, performing a power management operation according to the power management virtual path includes:

[0040] detecting whether the first type of control unit reaches a first power control target;

[0041] If the first type of control unit fails to reach the first power control target, starting the second type of control unit to perform power control;

[0042] After the second type of control unit reaches the second power control target, it detects whether the first type of control unit reaches the first power control target. If not, the first type of power control unit is started to perform power control to achieve the first power control target.

[0043] In this embodiment, the power control is implemented by first making the second control unit reach the power control target, and then making the first control unit reach the power control target.

[0044] The above process can be executed periodically, or executed after being triggered by an event, or executed after receiving an instruction, etc.

[0045] In one embodiment, the method further includes: the power management virtual path further includes a third type of control unit, and the third type of control unit is used to control the power difference between different wavelength signals in the same optical channel to remain unchanged. The power difference is the power difference value. If the powers of optical signals of different wavelengths are the same, the powers of optical signals of different wavelengths are maintained in the same state. Specifically, this goal can be achieved by controlling the gain value and attenuation value of the optical add / drop node (such as an OADM node).

[0046] In one embodiment, the method further includes, when detecting that the optical fiber connection path has changed, updating the power management virtual path; and performing power management operations according to the updated power management virtual path. The solution provided by this embodiment can adapt to changes in the optical fiber connection path and change the power management virtual path accordingly.

[0047] In one embodiment, the control unit (first type control unit, second type control unit, third type control unit) generally includes but is not limited to a control module, a detection module and an execution module. Figure 2 The control module is used to receive relevant parameters set by the user, execute the preset control algorithm, and issue control commands. The detection module is used to collect and report the optical power parameters required by the above control module. The execution module is used to execute the control commands issued by the above control module to achieve the effect of automatic power control.

[0048] The optical network power control method provided by the embodiment of the present invention can solve the problem of extremely complex dynamic maintenance in the optical network system due to external environmental changes, natural aging of optical fibers, and mutual influence of the power of multiple wavelengths by automatically controlling the absolute power of a single wavelength and automatically controlling the unified relative power of multiple wavelengths, thereby realizing the automatic control function of the optical network power. In addition, it overcomes the major engineering difficulties such as the need for manual management of the optical power of each node in the optical network system in the prior art, and the inability to automatically open the newly opened service according to the actual characteristics and line conditions of the existing system when expanding the capacity, and not affecting the normal transmission of the existing service. The solution provided by the embodiment of the present invention saves labor costs and the cost of maintenance and use in the later stage of the project.

[0049] It should be noted that in other embodiments, the first type of control unit may also only control the absolute power of some optical add / drop nodes on the optical fiber connection path, the second type of control unit may also only perform absolute power control on some multiplexing segments on the optical fiber connection path, or may combine multiple adjacent multiplexing segments to perform relative power control, and so on.

[0050] The present application is further described below through specific examples.

[0051] Embodiment 1:

[0052] In this embodiment, the optical add / drop node is an OADM.

[0053] Simple optical network power automatic control system, refer to Figure 3 , including a service sending unit 320, a service sending unit 321 and a corresponding service receiving unit 322. The sending unit 320 is connected to the corresponding receiving unit 322 through a plurality of OADM nodes 330, 331 and 332 and a plurality of OA nodes 340, 341, 342, 343, 344 and 345 via an optical fiber link; the sending unit 321 is connected to the corresponding receiving unit 322 through a plurality of OADM nodes 333, 331 and 332 and a plurality of OA nodes 346, 347, 342, 343, 344 and 345 via an optical fiber link.

[0054] At the start-up stage, the optical network power automatic control system first obtains the topology data of the entire system. The preset algorithm is executed according to the topology data to create a power management virtual path 100. The power management virtual path 100 includes a second-type control unit and a third-type control unit. Among them, the second-type control unit corresponds to the span, and the second-type control unit is used to automatically control the gain value of the OA and the attenuation value of the adjustable attenuator managed by each of them according to the input and output optical power of the upstream and downstream OA nodes of the span, the gain value of the OA, and the attenuation value of the adjustable attenuator, so that the main optical power passing through meets the transmission requirements. Among them, the third-type control unit is used in long-distance transmission networks. According to the degradation of optical performance of the business optical signal to be transmitted when it is affected by the stimulated Raman effect and the light scattering effect, the gain flatness is automatically adjusted, so that the business optical signal after long-distance transmission meets the requirements of the receiver (power value and signal-to-noise ratio, etc.). Reference Figure 3 The second type of control unit includes control units 306, 307, 308 and 309, which are respectively responsible for controlling the main optical power performance of the span from OA node 340 to OA node 341, the span from OA node 342 to OA node 343, the span from OA node 344 to OA node 345, and the span from OA node 346 to OA node 347. The third type of control unit includes control unit 310, which is responsible for controlling the main optical power performance in the long-distance transmission network, specifically, controlling the power difference of optical signals of each wavelength in the same optical channel to remain unchanged, or controlling the power of optical signals of each wavelength to be the same.

[0055] In the operation phase, in order to stabilize the main optical power, the second type of control units 306, 307, 308 and 309 perform control in a timing cycle. The input and output optical power, gain value and attenuation value of the adjustable attenuator of the upstream and downstream OA nodes of the span are collected as input parameters through the detection module, and the preset algorithm is executed to calculate the target gain value of the upstream and downstream OA and the target attenuation value of the adjustable attenuator. Then, the current gain value of the OA and the attenuation value of the adjustable attenuator are collected through the detection module. If the current gain value is inconsistent with the target gain value, and the current attenuation value is inconsistent with the target attenuation value, an adjustment process is started to adjust the optical amplifier and adjustable attenuator managed by the control unit so that the actual gain value approaches the target gain value and the attenuation value approaches the target attenuation value. In addition, in order to reduce the number of adjustments and extend the service life of optical devices, the deviation threshold of gain and attenuation can be set. When the deviation between the actual value and the target value exceeds the deviation threshold, the above adjustment process is started. For example, whether the gain value and attenuation value of the node 341 need to be adjusted is determined according to the output optical power of the node 340 , the input optical power of the node 341 , and the gain of the node 341 .

[0056] Embodiment 2:

[0057] During the service activation phase, new service configurations are received from the upper-level control management plane, and a corresponding first-class control unit is created. The control module of the first-class control unit executes a preset algorithm based on input parameters such as the center frequency, modulation code type, bandwidth, and transmission optical fiber type of the new service to obtain the target fiber input optical power of the service at each OADM node. The actual value of the current fiber input optical power is then collected by the detection module. If the actual value is inconsistent with the target value, the adjustment function is started. The control module of the first-class control unit adjusts the managed OADM nodes through the execution module so that the actual fiber input optical power of the channel at each OADM node approaches the target fiber input optical power, thereby completing the service activation function. Refer to Figure 3 , the control units 301, 302, 303, 304 and 305 belong to the first type of control units, and are responsible for controlling the channel optical power performance of channel 1 (channel where λ1 is located), channel 2 (channel where λ2 is located), channel 3 (channel where λ3 is located), channel 4 (channel where λ4 is located) and channel 5 (channel where λ5 is located) at each OADM node. Specifically, the control unit 301 is responsible for controlling the channel optical power performance of channel 1 at each OADM node, the control unit 302 is responsible for controlling the channel optical power performance of channel 2 at each OADM node, the control unit 303 is responsible for controlling the channel optical power performance of channel 3 at each OADM node, the control unit 304 is responsible for controlling the channel optical power performance of channel 4 at each OADM node, and the control unit 305 is responsible for controlling the channel optical power performance of channel 5 at each OADM node.

[0058] During the service operation phase, in order to maintain the stability of the channel optical power, the first type of control units 301, 302, 303, 304 and 305 perform power control in a regular period. The actual value of the current optical power input to the OADM node collected by the detection module, if the actual value is inconsistent with the target value, the adjustment function is started. The control module of the control unit adjusts the managed OADM nodes through the execution module, so that the actual optical power input to the fiber of the channel at each OADM node tends to the target optical power input to the fiber, and the performance of the optical power of each channel is maintained in real time. In addition, in order to reduce the number of adjustments and extend the service life of optical devices, a deviation threshold of the optical power input can be set. When the difference between the actual optical power input to the fiber of the service light and the target optical power input to the fiber exceeds the deviation threshold, the above-mentioned adjustment process is started.

[0059] In addition, in combination with the power control process mentioned in Example 1 (called the main optical power control process), when the main optical power and channel power start the control and adjustment process at the same time, the power management virtual path will make real-time decisions on the adjustment strategy based on the preset algorithm to complete the automatic control of the channel power and the main optical power.

[0060] Embodiment three:

[0061] Complex optical network power automatic control system, refer to Figure 4 ,like Figure 4 As shown, nodes 1, 2, 14, 15, 25, 26 are service transmitters and receivers. Nodes 3, 8, 13, 20 are wavelength selectors (such as OADM). Nodes 4, 5, 6, 7, 9, 10, 11, 12, 16, 17, 18, 19, 21, 22, 23, 24 are optical power amplifiers (such as OA).

[0062] Service switching, during the transmission process, due to natural conditions or human factors, causes the attenuation value of the optical fiber link to change dramatically, and ASON (Automatically Switched Optical Network) recovery usually occurs. The service optical signal will switch from one optical path to another. The optical network power automatic control method provided by the embodiment of the present invention, in conjunction with the ASON dynamic rerouting function, can effectively control the optical path change of the service signal and maintain stability. Initially, the service passed through multiple OADM and OA nodes such as nodes 3-4-5-8-9-10-13. Now the optical fiber link between node 9 and node 10 is damaged, and the optical transmission path is interrupted. ASON performs the recovery routing function. After recalculating the optical path, it is now necessary to bypass nodes 9 and 10 on the path between node 8 and node 13, and pass through node 20 to node 13, that is, the new path is nodes 3-4-5-8-17-19-20-21-22-13. At this time, the link through which the service passes has changed. When the service signal is transmitted to the receiving end through the new path, the power and OSNR (Optical Signal Noise Ratio) and other performance generally do not meet the requirements of the receiving end. At this time, the power automatic control system is cooperated to automatically control the optical performance of the new optical path to restore the service to normal. The control process of the power automatic control system includes: first, obtaining the topological data of the entire system, executing the preset algorithm according to the topological data, updating the power management virtual path, and specifically, creating a corresponding second-class control unit 28 according to the new optical fiber connection path, which is used to automatically control the OA gain value and the attenuation value of the adjustable attenuator managed by each according to the input and output optical power, OA gain value and attenuation value of the adjustable attenuator of the new span upstream and downstream OA nodes, so that the main optical power of the path meets the transmission requirements. At the same time, the new configuration of the service sent from ASON is received, and the corresponding first-class control unit 27 is updated. The control module of the first-class control unit 27 then executes the preset algorithm according to the input parameters such as the center frequency, modulation code type, bandwidth, and transmission optical fiber type updated by the service, and obtains the target fiber input optical power of the service at each OADM node. The actual value of the current fiber optical power is collected through the detection module. If the actual value is inconsistent with the target fiber optical power, the adjustment function is started. The control module of the first type of control unit 27 adjusts each OADM node managed by the execution module so that the actual fiber optical power of the channel at each OADM node approaches the target fiber optical power, thereby completing the service switching function.

[0063] like Figure 5As shown, an embodiment of the present invention provides an optical network power automatic control device 50, including a memory 510 and a processor 520, wherein the memory 510 stores a program, and when the program is read and executed by the processor 520, the optical network power automatic control method described in any embodiment is implemented.

[0064] like Figure 6 As shown, an embodiment of the present invention provides a computer-readable storage medium 60, which stores one or more programs 610. The one or more programs 610 can be executed by one or more processors to implement the optical network power automatic control method described in any embodiment.

[0065] like Figure 7 As shown, an embodiment of the present invention provides an optical network power automatic control system, including an optical network 701 and an optical network power automatic control device 702 described in any embodiment.

[0066] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain 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.

Claims

1. An optical network power automatic control method, comprising: Establishing a power management virtual path according to the optical fiber connection path, wherein the power management virtual path includes a third type control unit; performing a power management operation according to the power management virtual path, including at least one of the following: The gain value and attenuation value of the optical add / drop node are controlled by the third type control unit so that the power difference between signals of different wavelengths in the same optical channel remains unchanged; In the case where the optical performance of the optical signal is degraded, the flatness of the gain value matching the requirement of the receiving end is determined by the third type control unit, so that the optical signal meets the requirement of the receiving end; Wherein, the power management virtual path further includes at least one of the following: a first type control unit, a second type control unit; Among them, the first type of control unit is used to control the power of a single-wavelength optical signal of an optical add / drop node on the optical fiber connection path, and performs power control according to an absolute power target during the power control process; the second type of control unit is used to perform power control on a multiplexing segment on the optical fiber connection path according to a relative power target, wherein the path between adjacent optical add / drop nodes on the optical fiber connection path is used as a multiplexing segment.

2. The optical network power automatic control method according to claim 1, characterized in that: The first type of control unit performs power control according to the absolute power target during the power control process, including: determining the absolute power target according to the information of the transmitted single-wavelength optical signal, and controlling the optical power of the single-wavelength optical signal at the optical add / drop node to reach the absolute power target.

3. The optical network power automatic control method according to claim 1, characterized in that: The second type of control unit is used to perform power control on the multiplex section on the optical fiber connection path according to the relative power target, including: for any multiplex section, controlling the difference between the input power and the output power of the multiplex section to reach the relative power target.

4. The optical network power automatic control method according to claim 3, characterized in that: The controlling of the difference between the input power and the output power of the multiplex section to reach the relative power target is achieved by: Determine the target attenuation value and target gain value of the upstream optical amplifier node and the downstream optical amplifier node of the multiplex section according to the input power of the upstream optical amplifier node of the multiplex section, the output power of the downstream optical amplifier node, the attenuation value and gain value of the upstream optical amplifier node, and the attenuation value and gain value of the downstream optical amplifier node; The attenuation values ​​of the upstream optical amplifier node and the downstream optical amplifier node of the multiplex section are adjusted to the target attenuation value, and the gain values ​​of the upstream optical amplifier node and the downstream optical amplifier node of the multiplex section are adjusted to the target gain value.

5. The optical network power automatic control method according to claim 1, characterized in that: The performing a power management operation according to the power management virtual path comprises: detecting whether the first type of control unit reaches a first power control target; If the first type of control unit fails to reach the first power control target, starting the second type of control unit to perform power control; After the second type control unit reaches the second power control target, it detects whether the first type control unit reaches the first power control target, and if not, starts the first type control unit to perform power control to reach the first power control target.

6. The optical network power automatic control method according to any one of claims 1 to 5, characterized in that: The method further includes, when detecting that the optical fiber connection path is changed, updating the power management virtual path; and performing a power management operation according to the updated power management virtual path.

7. An automatic device for optical network power control, characterized in that: The method comprises a memory and a processor, wherein the memory stores a program, and when the program is read and executed by the processor, the method for automatic power control of an optical network as claimed in any one of claims 1 to 6 is implemented.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the optical network automatic power control method as described in any one of claims 1 to 6.

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