阅读说明：本技术 一种光网络节点调测方法和控制设备 (Optical network node debugging method and control equipment ) 是由 范明惠 陈春晖 于 2020-05-11 设计创作，主要内容包括：本申请实施例提供一种光网络节点调测方法和控制设备,所述方法包括：获取光信号的目标输出功率和当前输出功率,其中,所述当前输出功率为所述光信号当前在所述光网络节点输出侧的功率；当所述当前输出功率相对于所述目标输出功率的偏离大于或者等于第一预定阈值时,获取所述光信号的当前节点插损；判断所述当前节点插损相对于基准节点插损的偏离是否大于或者等于第二预定阈值；基于所述判断的结果确定是否对所述光网络节点进行调测。光网络节点调测方法使得可在确定功率偏离是由本节点引起的情况下进行对本节点的功率调测,提高了调测效率。(The embodiment of the application provides an optical network node debugging method and control equipment, wherein the method comprises the following steps: acquiring target output power and current output power of an optical signal, wherein the current output power is the current power of the optical signal at the output side of the optical network node; when the deviation of the current output power relative to the target output power is larger than or equal to a first preset threshold value, acquiring the insertion loss of a current node of the optical signal; judging whether the deviation of the current node insertion loss relative to the reference node insertion loss is larger than or equal to a second preset threshold value or not; and determining whether to debug the optical network node based on the judgment result. The optical network node debugging method can carry out power debugging on the node under the condition that the power deviation is caused by the node, and the debugging efficiency is improved.)

1. An optical network node commissioning method, the method being for a node control device, the method comprising:

acquiring target output power and current output power of an optical signal, wherein the current output power is the current power of the optical signal at the output side of the optical network node;

when the deviation of the current output power relative to the target output power is larger than or equal to a first preset threshold value, acquiring the insertion loss of a current node of the optical signal;

judging whether the deviation of the current node insertion loss relative to the reference node insertion loss is larger than or equal to a second preset threshold value or not;

and determining whether to debug the optical network node based on the judgment result.

2. The method of claim 1, wherein the determining whether to debug the optical network node based on the result of the determination comprises:

when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, the optical network node is determined to be debugged, or

And when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be smaller than the second preset threshold value, determining not to conduct debugging and testing on the optical network node.

3. The method according to claim 1 or 2, wherein the optical network node comprises at least one optical power adjuster, and wherein the determining to adjust the optical network node comprises determining to adjust the at least one power adjuster.

4. The method according to any of claims 1 to 3, wherein the node control device stores in advance a target output power of the optical signal at the output side of the optical network node and/or a reference node insertion loss of the optical signal.

5. The method according to any of claims 1 to 4, wherein the reference node insertion loss is obtained based on at least one node insertion loss of the optical network nodes, the at least one node insertion loss being obtained when the output power of the optical signal deviates from the target output power by less than the first predetermined threshold.

6. The method according to any one of claims 1 to 5, wherein said obtaining the current node insertion loss of the optical signal is: and obtaining a difference value between the current output power and the current input power, wherein the current input power is the current power of the optical signal at the input side of the optical network node.

7. The method according to any of claims 1-6, wherein the method further comprises, after determining to perform the adjustment measurement on the optical network node, the node control device sending adjustment information to the at least one optical power adjuster, the adjustment information being used to instruct the at least one optical power adjuster to perform the power adjustment on the optical signal.

8. An optical network node control apparatus, comprising:

a first obtaining unit, configured to obtain a target output power and a current output power of an optical signal, where the current output power is a power of the optical signal at an output side of the optical network node;

a second obtaining unit, configured to obtain a current node insertion loss of the optical signal when a deviation of the current output power from the target output power is greater than or equal to a first predetermined threshold;

the judging unit is used for judging whether the deviation of the current node insertion loss relative to the reference node insertion loss is larger than or equal to a second preset threshold value or not;

and the determining unit is used for determining whether to debug the optical network node based on the judgment result.

9. The apparatus of claim 8, wherein the determination unit is further configured to: and when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to debug the optical network node, or when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be smaller than the second preset threshold value, determining not to debug the optical network node.

10. The apparatus according to claim 8 or 9, wherein the optical network node comprises at least one optical power adjuster, and wherein the determining unit is further configured to: and when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to adjust the at least one optical power adjuster.

11. The apparatus according to any of claims 8-10, wherein the node control apparatus pre-stores a target output power of the optical signal at the output side of the optical network node and/or a reference node insertion loss of the optical signal.

12. The apparatus according to any of claims 8-11, wherein the reference node insertion loss is obtained based on at least one node insertion loss of the optical network nodes, the at least one node insertion loss being obtained when the output power of the optical signal deviates from the target output power by less than the first predetermined threshold.

13. The apparatus according to any one of claims 8 to 12, wherein the second obtaining unit is further configured to: and obtaining a difference value between the current output power and the current input power, wherein the current input power is the current power of the optical signal at the input side of the optical network node.

14. The apparatus according to any of claims 8-13, further comprising a sending unit, configured to send adjustment information to the at least one optical power adjuster after determining to perform adjustment measurement on the optical network node, where the adjustment information is used to instruct the at least one optical power adjuster to perform power adjustment on the optical signal.

15. An optical network node control device comprising a memory having stored therein a computer program or instructions, and a processor for executing the computer program or instructions to implement the method of any of claims 1-7.

16. An optical network node, characterized in that the optical network node comprises the optical network node control device according to any of claims 8 to 15 and at least one adjusting device, wherein the at least one adjusting device is configured to perform power adjustment on an optical signal upon receiving adjustment information of the optical network node control device.

17. A computer-readable storage medium, having stored thereon a computer program or instructions which, when executed in a computer, cause the computer to perform the method of any one of claims 1-7.

18. A computer program product, characterized in that the computer program product comprises a computer program or instructions which, when executed by a computer, implements the method of any one of claims 1-7.

Technical Field

The present application relates to the technical field of optical communications, and in particular, to a method and a control device for adjusting and measuring an optical network node.

Background

With the rapid increase of data services, the demand for high-speed data services is increasing, and Dense Wavelength Division Multiplexing (DWDM) optical networks become the mainstream of new-generation optical networks. Among various wavelength division multiplexing Optical networks, an Optical network using a Reconfigurable Optical Add-Drop Multiplexer (ROADM) occupies an important position. The ROADM optical network includes a plurality of nodes, each node includes, for example, a single board such as an optical conversion unit, an optical amplifier, and a wavelength selective switch connected by an intra-node optical fiber, and different nodes are connected by an inter-node optical fiber. With the operation of the optical network, the attenuation of the optical fiber between nodes in the optical network, the attenuation of the optical fiber in the node, and the insertion loss of the single board may be degraded, and these degradations may cause abnormal power of the service signal, affecting the service transmission performance. In order to solve this problem, it is necessary to adjust the gain or single-wave attenuation of the optical amplifier in the optical network node so as to recover the degraded transmission performance. The current node debugging method mainly comprises a single-node self-debugging method and a method for cooperatively debugging a plurality of nodes. In the multi-node cooperative debugging method, considering that when an optical signal is transmitted from an upstream source end to a downstream sink end, and when the upstream power changes, the downstream also changes, in order to coordinate the upstream and downstream debugging relations, cooperative control is performed on a plurality of network elements, for example, each network element is debugged sequentially downstream in series from the upstream source node. The multi-node cooperative debugging and testing method needs the cooperative control of a plurality of nodes and is complex in processing. In the existing single-node self-regulation and measurement method, each node carries out power regulation and measurement of the node so as to maintain the output single-wave power of the node as target power. However, in this single-node self-tuning method, when the upstream power changes while an optical signal is transmitted from the upstream source end to the downstream sink end, the downstream also changes, that is, when the upstream inter-node optical fiber degrades or the upstream node internal insertion loss degrades, the downstream node also detects that the output power deviates from the target power, and at this time, if tuning is started at the downstream node, it is invalid, which results in repeated tuning of power and slow tuning convergence. Therefore, a more efficient optical network node commissioning solution is needed.

Disclosure of Invention

The embodiment of the present application aims to provide a more effective optical network node debugging and testing scheme to solve the deficiencies in the prior art.

In order to achieve the above object, an aspect of the present application provides an optical network node commissioning method, where the method is used for a node control device, and the method includes: acquiring target output power and current output power of an optical signal, wherein the current output power is the current power of the optical signal at the output side of the optical network node; when the deviation of the current output power relative to the target output power is larger than or equal to a first preset threshold value, acquiring the insertion loss of a current node of the optical signal; judging whether the deviation of the current node insertion loss relative to the reference node insertion loss is larger than or equal to a second preset threshold value or not; and determining whether to debug the optical network node based on the judgment result.

In one embodiment, the determining whether to debug the optical network node based on the result of the determination includes: when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to debug the optical network node; and when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be smaller than the second preset threshold value, determining not to conduct debugging and testing on the optical network node.

In the method for adjusting and testing the optical network node, when the output power of the optical signal deviates from the target output power greatly, whether the current node insertion loss deviates from the reference node insertion loss greatly is determined, so that whether the power deviation of the optical signal is generated by the node is judged, and when the power deviation is determined to be generated by the node, the configuration in the optical path of the optical signal is adjusted, so that the power of the optical signal can reach the target output power when the optical signal is received through the optical path in the subsequent process. In the case that the power deviation is determined not to be generated by the node, the configuration of the node is not adjusted, so that the problem that the downstream regulation is invalid when the power deviation is generated by the node upstream of the node in the prior art is solved.

In one embodiment, an optical path in the optical network node for transmitting the optical signal includes at least one optical power adjuster, and the determining to adjust the optical network node includes determining to adjust the at least one power adjuster.

In one embodiment, the node control device stores in advance a target output power of the optical signal at the output side of the optical network node and/or a reference node insertion loss of the optical signal. In this embodiment, by presetting the target output power and/or the reference node insertion loss of the optical signal in the control device, the target output power and/or the reference node insertion loss can be directly obtained from the local during the above method, and the method execution efficiency is improved.

In one embodiment, the reference node insertion loss is obtained based on at least one node insertion loss of the optical network node, the at least one node insertion loss being obtained when the output power of the optical signal deviates from the target output power by less than the first predetermined threshold.

In one embodiment, the obtaining of the current node insertion loss of the optical signal refers to: and obtaining a difference value between the current output power and the current input power, wherein the current input power is the current power of the optical signal at the input side of the optical network node.

In one embodiment, the method further includes, after determining to perform the adjustment measurement on the optical network node, the node control device sending adjustment information to the at least one optical power adjuster, where the adjustment information is used to instruct the at least one optical power adjuster to perform the power adjustment on the optical signal.

In an embodiment, the optical path includes a first wavelength selective switch, and the first wavelength selective switch includes a first optical power adjuster corresponding to the optical path, where the adjusting and measuring the optical network node includes adjusting the first optical power adjuster. In this embodiment, in the ROADM optical network node, the power of the optical signal may be adjusted by adjusting an optical power adjuster in a Wavelength Selective Switch (WSS).

In an embodiment, the optical path includes a second wavelength selective switch, and the second wavelength selective switch includes a second optical power adjuster corresponding to the optical path, where the adjusting and measuring the optical network node further includes adjusting the second optical power adjuster. In this embodiment, in a ROADM optical network node, the power of the optical signal can be adjusted by adjusting the optical power adjusters that input and output the WSS simultaneously.

In one embodiment, the optical power adjuster is an optical power attenuator, and the current output power is less than the target output power, wherein adjusting the at least one optical power adjuster includes adjusting the at least one optical power adjuster to reduce attenuation of the optical signal at the first wavelength.

In one embodiment, the optical power adjuster is an optical power attenuator, and the current output power is greater than the target output power, and adjusting the at least one optical power adjuster includes adjusting the at least one optical power adjuster to increase attenuation of the optical signal at the first wavelength.

Another aspect of the present application provides an optical network node control device, including: a first obtaining unit, configured to obtain a target output power and a current output power of an optical signal, where the current output power is a power of the optical signal at an output side of the optical network node; a second obtaining unit, configured to obtain a current node insertion loss of the optical signal when a deviation of the current output power from the target output power is greater than or equal to a first predetermined threshold; the judging unit is used for judging whether the deviation of the current node insertion loss relative to the reference node insertion loss is larger than or equal to a second preset threshold value or not; and the determining unit is used for determining whether to debug the optical network node based on the judgment result.

In one embodiment, the determining unit is further configured to: when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to debug the optical network node; and when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be smaller than the second preset threshold value, determining not to conduct debugging and testing on the optical network node.

In one embodiment, the optical network node includes at least one optical power adjuster, and the determining unit is further configured to: and when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to adjust the at least one optical power adjuster.

In one embodiment, the node control device stores in advance a target output power of the optical signal at the output side of the optical network node and/or a reference node insertion loss of the optical signal.

In one embodiment, the reference node insertion loss is obtained based on at least one node insertion loss of the optical network node, the at least one node insertion loss being obtained when the output power of the optical signal deviates from the target output power by less than the first predetermined threshold.

In one embodiment, the second obtaining unit is further configured to: and obtaining a difference value between the current output power and the current input power, wherein the current input power is the current power of the optical signal at the input side of the optical network node.

In an embodiment, the apparatus further includes a sending unit, configured to send, after determining to perform the adjustment measurement on the optical network node, adjustment information to the at least one optical power adjuster, where the adjustment information is used to instruct the at least one optical power adjuster to perform power adjustment on the optical signal.

Another aspect of the present application provides an optical network node control device, including a memory and a processor, where the memory stores a computer program or instructions, and the processor is configured to execute the computer program or instructions to implement any one of the above methods.

Another aspect of the present application provides an optical network node, where the optical network node includes any one of the foregoing optical network node control devices and at least one adjusting device, where the at least one adjusting device is configured to perform power adjustment on an optical signal when receiving adjustment information of the optical network node control device.

Another aspect of the present application provides a computer-readable storage medium, having stored thereon a computer program or instructions, which, when executed in a computer, causes the computer to perform any of the above-mentioned methods.

Another aspect of the present application provides a computer program product, comprising a computer program or instructions, which when executed by a computer, performs any of the above methods.

In the method for adjusting and testing an optical network node provided in the embodiment of the present application, when the output power of an optical signal deviates from a target output power greatly, it is determined whether the current node insertion loss deviates from the reference node insertion loss greatly, so as to determine whether the power deviation of the optical signal is generated by the node. In the case that the power deviation is determined not to be generated by the node, the configuration of the node is not adjusted, so that the problem that the downstream regulation is invalid when the power deviation is generated by the node upstream of the node in the prior art is solved.

Drawings

The embodiments of the present application can be made more clear by describing the embodiments with reference to the attached drawings:

fig. 1 is an architecture diagram of an optical communication system according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an internal structure of a ROADM1 node according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an internal structure of a WSS1 provided in an embodiment of the present application;

fig. 4 is a flowchart of a method for debugging an optical network node according to an embodiment of the present application;

fig. 5 is a flowchart of another optical network node commissioning method according to an embodiment of the present application;

fig. 6 is a flowchart of another optical network node commissioning method according to an embodiment of the present application;

fig. 7 is a schematic diagram of an optical network node control device 700 according to an embodiment of the present application;

fig. 8 is a schematic diagram of an optical network node control device 800 according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical scheme provided by the application can be applied to an optical communication system, and the optical communication system can be applied to various communication scenes. Such as local trunks, long-distance trunked communications, global communications networks, public telecommunication networks of various countries. The optical communication system can also be used for high-quality color television transmission, industrial production site monitoring and scheduling, traffic monitoring control command, urban cable television network, community antenna system (CATV), and fiber local area network. For example, optical communication systems may be used in aircraft, spacecraft, naval vessels, mines, power departments, military and corrosive and radiative scenarios.

The optical communication system may be a ring network, a mesh network or other form of network architecture, including optical network nodes and optical links. The optical link is used to transmit optical signals, for example, the optical link may be an optical fiber. The optical network node is used for realizing the up-down wave, blocking and direct configuration of optical signals with any wavelength and wavelength group. The optical network node sends the information which needs to be downloaded at the optical network node to the processing equipment, and the information which does not need to be processed by the optical network node directly passes through the optical link from the optical network node. The optical network nodes may include optical add-drop multiplexers (OADMs) and may also include optical cross-connect (OXCs) devices. OADM allows different wavelength signals of different optical communication systems to be subjected to add-drop multiplexing at different places, and the OXC equipment allows different optical communication systems to be dynamically combined, so that wavelength resources are allocated according to requirements, and a wider range of network interconnection is realized. Among them, OADMs include two types, a fixed type and a reconfigurable type. The fixed type can only be used for one or more fixed wavelengths, and the routing of the node is determined; the reconfigurable optical add/drop multiplexer can dynamically adjust the wavelength of the upper channel and the lower channel of the OADM node, and can realize the dynamic reconfiguration of an optical communication system. A Reconfigurable Optical Add Drop Multiplexer (ROADM) is a reconfigurable OADM, and a ROADM optical network node is taken as an example in the present application for explanation.

Fig. 1 is an architecture diagram of an optical communication system according to an embodiment of the present application. The technical solution provided by the embodiment of the present application may be applied to an optical communication system architecture as shown in fig. 1, where the system architecture may include at least one ROADM node, and the ROADM nodes are connected to each other through an optical link. One ROADM node can be connected to any number of other ROADM nodes, that is, the ROADM nodes have different dimensions, and the dimension refers to the number of optical fibers connected to the ROADM node. For example, the optical network includes ROADM1 nodes and ROADM2 nodes, where a ROADM1 node is a 3-dimensional ROADM node, and a ROADM2 node is a 4-dimensional ROADM node.

Fig. 2 is a schematic internal structure diagram of a ROADM1 node according to an embodiment of the present disclosure. As shown in fig. 2, the ROADM1 node includes a control device 1 and a plurality of optical devices, and the control device 1 is configured to connect with a controllable optical device (e.g., an optical power adjusting device) of the plurality of optical devices to control the optical device. The ROADM1 node is a 3-dimensional ROADM node, and the 3 dimensions are east, west, and north as shown in the figure. Wherein each dimension in ROADM1 nodes includes one input Wavelength Selective Switch (WSS) and one output WSS, wherein the west side includes input WSS1 and output WSS4, the east side includes output WSS2 and input WSS3, and the north side includes input WSS5 and output WSS 6. Each input WSS in ROADM1 may transmit any one of the input composite optical signals to any one of the output WSSs and the local add port, and each output WSS in ROADM1 node may receive signals from any one of the input WSSs and the local add portAn optical signal of the wave port. The optical signal transmission from WSS1 to WSS2 is schematically illustrated in fig. 2. The west input port at the ROADM1 node includes an Optical Amplifier (OA) 1, OA1 for amplifying the power of the combined wave optical signal. An Optical channel Performance Monitor (OPM) 1 is connected to the OA1, and the OPM1 can Monitor the Optical spectrum characteristics, power characteristics, and Optical signal noise characteristics of each wavelength signal in the multi-wavelength channel in real time. The OPM1 is also connected to the control device 1 for measuring the power of each single-wave optical signal in the input optical signals of the ROADM1 node based on the indication of the control device 1. OA1 is connected to the input port of WSS1, and three output ports of WSS1 are connected to the input port of WSS6, the input port of WSS2, and the local downstream port, respectively. Wherein the local subwave port is connectable with the OPM3 for measuring optical power of the respective wavelength optical signal to enter the local subwave port. For example, as shown in FIG. 2, the optical signal input to OA1 is λ₁-λ₅The optical signal enters an input port of the WSS1 after being amplified by OA1, and three output ports of the WSS1 respectively output lambda₁And λ₂Composite wave optical signal, lambda₃-λ₅Composite wave optical signal, lambda₂-λ₄And (4) combining the optical signals.

The WSS2 includes three input ports, two other input ports except the input port connected to one output port of the WSS1 are connected to the output port of the WSS5 and the local add port, and the output port of the WSS2 is connected to the OA 2. Wherein the local ground wave port is connectable with the OPM4 for measuring optical power of the optical signal of each wavelength from the local ground wave port. Also connected to OA2 is OPM2, and OPM2 is connected to control device 1, and is configured to measure the power of each single-wave optical signal in the output optical signals of ROADM1 node based on the indication of control device 1. For example, as shown in FIG. 2, three input ports of WSS2 input λ respectively₆And λ₇Composite wave optical signal, lambda₃-λ₅Composite wave optical signal, lambda₈And λ₉The optical signals are combined so that the output port of the WSS2 outputs λ₃-λ₉And (4) combining the optical signals.

In addition, each of OA3-OA6 in FIG. 2 is actually connected with an OPM (not shown). In the ROADM1 node, the optical signals input from the east side can also be output from the north side, the optical signals input from the north side can also be output from the west side, the output ports of other input WSSs in the figure can all be connected to the local add port, and the input ports of other output WSSs can all be connected to the local drop port, which are not shown in fig. 2.

Fig. 3 is a schematic diagram of an internal structure of a WSS1 according to an embodiment of the present application. As shown in fig. 3, the WSS1 includes a demultiplexer connected to an input port, and a multiplexer 1, a multiplexer 2, and a multiplexer 3 connected to three output ports, respectively. The demultiplexer is used for decomposing the input composite optical signal into single-wave optical signals. For example, as shown in FIG. 3, λ is divided by a demultiplexer₁-λ₅Decomposition of the combined optical signal into lambda₁Optical signal, lambda₂Optical signal, lambda₃Optical signal, lambda₄Optical signal sum λ₅An optical signal. Each single-wave output port of the demultiplexer is connected to a1 × 3 Optical Switch (OSW), schematically shown as OSW1-OSW5, wherein each Optical Switch is connected to the control device 1 for controlling the transmission of the corresponding single-wave Optical signal to the multiplexer 1, the multiplexer 2 and the multiplexer 3, respectively, based on the indication of the control device 1. For example, as shown in fig. 3, with respect to multiplexer 2, OSW1 is closed, OSW2 is closed, OSW3 is open, OSW4 is open, OSW5 is open, such that only λ is opened₃Optical signal, lambda₄Optical signal, lambda₅The Optical signals are transmitted to the multiplexer 2 via Variable Optical Attenuators (VOAs) 3-VOAs 5, respectively, wherein the dashed arrows of OSW1 to VOA1 and OSW2 to VOA2 indicate that no single-wave light is transmitted here. Each multiplexer comprises a predetermined number of optical inlets, each optical inlet being previously connected to a VOA, schematically shown are 5 optical inlets and 5 corresponding VOAs 1-VOAs 5, wherein each VOA is connected to the control device 1 for performing attenuation of a respective optical signal based on an indication of the control device 1, wherein the dashed arrows after VOAs 1 and VOAs 2 indicate that no single wave optical signal is transmitted here. VOA can carry out light power within an adjustable rangeAnd attenuated, thereby serving to equalize the optical power of the individual single-wave optical signals. The VOA can be realized by various technologies, such as a tunable diffraction grating technology, a Micro-Electro-Mechanical System (MEMS) technology, a liquid crystal technology, a magneto-optical technology, a planar optical waveguide technology, and the like, without limitation. The VOA may have different adjustable ranges according to the implementation technology of the VOA, for example, the adjustable range of the liquid crystal VOA may reach 25 decibels (dB), and the adjustable range of the planar optical waveguide VOA may reach 40 dB.

Passing through VOA3, VOA4 and VOA5 respectively₃Optical signal, lambda₄Optical signal, lambda₅After the optical signal is transmitted to the optical input of the multiplexer 2, the multiplexer 2 will transmit λ₃Optical signal, lambda₄Optical signal, lambda₅The combination of the optical signals is lambda₃-λ₅The optical signals are combined and output to WSS 1. As shown in FIG. 2, WSS1 couples λ through one of its output ports₃-λ₅The combined optical signal is transmitted to one input port of WSS 2. Similarly, the output port in WSS1 corresponding to multiplexer 1 would include λ₁Optical signal sum λ₂The combined optical signal of the optical signals is sent to one input port of the WSS6, and the output port of the WSS1 corresponding to the multiplexer 3 will include λ₂Optical signal, lambda₃Optical signal sum λ₄And sending the composite optical signal of the optical signal to the local subwave port.

The internal structure of WSS2 is similar to that of WSS1, except that WSS2 includes three input ports, one output port. That is, three demultiplexers and one multiplexer are included in WSS 2. In addition, similarly, a VOA is connected before each optical input of the multiplexer for power adjustment of each single-wave optical signal.

Hereinafter, an embodiment of the present application will be described based on fig. 2 and 3.

Fig. 4 is a flowchart of a method for debugging an optical network node according to an embodiment of the present application, where the method is executed by the control device 1. The method is used for debugging and testing the ROADM1 node, and the control device 1 is connected with each OPM1 in the ROADM1 node, each OSW in each WSS and each VOA to control the ROADM1 node.

The control device 1 first receives a target output power of the optical signal from the service terminal before executing the method. The optical signal may be, for example, a single-wave optical signal or a combined-wave optical signal. For example, when all wavelength optical signals in the combined optical signal are output from the same output port of the optical network node, for example, the combined optical signal is input from the east input port of the optical network node and output from the west output port, the optical network node tuning method according to the embodiment of the present application may also be used to tune the combined optical signal. The following description will be made mainly with reference to the modulation with respect to a single-wave optical signal as an example. The control device 1 may store the target output power locally after receiving it, so that the target output power can be read directly from the local when executing the method. The target output power may be a nominal power commonly used by the optical network or a power preset according to a target of optimal performance. The relative λ of the optical path from OA1 to OA2 in the ROADM1 node will be described below₃The method of conditioning the optical signal is exemplified.

As shown in fig. 4, the testing method includes the following steps S402-S410.

First, in step S402, λ is acquired₃Reference node insertion loss of the optical signal.

After receiving the target output power of the respective single-wave optical signals, the control device 1, for example, for λ transmitted from OA1 to OA2 in fig. 2₃Optical signal, the control device 1 instructs the OPM1 and OPM2 to perform the pair lambda, respectively₃Measurement of input and output power of optical signals and receiving λ from OPM1 and OPM2₃Input power and output power of the optical signal. When determining lambda₃When the output power of the optical signal reaches the target output power or when the deviation from the target output power is smaller than a first predetermined threshold value, the control device 1 subtracts the corresponding input power from the output power to obtain λ₃Node insertion loss of optical signals. The first predetermined threshold is preset by the service personnel to indicate an acceptable range of target output power, for example 2 dB. Namely as placeWhen the output power is within the range of +/-2 dB of the target output power, the node insertion loss corresponding to the output power is lambda meeting the power requirement₃The single-wave insertion loss can be set to λ₃Reference node insertion loss of the optical signal. In one embodiment, λ may be obtained by multiple passes of OPM1 and OPM2, respectively₃The input power and output power of the optical signal are obtained, and the lambda meeting the power requirement is obtained for multiple times correspondingly₃Node insertion loss of optical signal, and multiple acquisition of these₃Node insertion loss averaging of optical signals as lambda₃Reference node insertion loss of the optical signal. The control device 1 is calculating lambda₃After a reference node insertion of the optical signal, the reference node insertion can be stored locally and thus directly readable when the next cycle of the method is performed.

In step S404, λ is acquired₃The current output power of the optical signal.

Specifically, the control device 1 may issue an instruction to the OPM2 to instruct the OPM2 to make a pair λ₃Measurement of the power of the optical signal. The OPM2 measures in real time after receiving the instruction, and measures the acquired lambda₃The power of the optical signal is returned to the control device 1.

Step S406, in case the deviation of the current output power from the target output power is greater than or equal to the first predetermined threshold, calculating λ₃The current node insertion loss of the optical signal.

As mentioned above, the first predetermined threshold is, for example, 2 dB. That is, in the case where the present output power is outside the range of the target output power ± 2dB, or in the case where the present output power is equal to the target output power ± 2dB, the present output power is not acceptable, and thus, λ is calculated₃The current node insertion loss of the optical signal. Specifically, in one embodiment, in the above step S406, the control apparatus 1 instructs the OPM1 to measure λ simultaneously with instructing the OPM2 to measure₃Power of optical signal, assuming λ measured by OPM1₃Optical power of the optical signal is P1, λ measured by OPM2₃The optical power of the optical signal is P2, the control device 1 calculates P2-P1 fromWhile obtaining lambda in the path from OA1 to OA2₃The current node insertion loss of the optical signal. It will be appreciated that the control device 1 may also instruct the OPM1 and OPM2 to proceed again with the pair λ respectively, in case the deviation of said current output power with respect to said target output power is greater than or equal to said first predetermined threshold₃And measuring the optical power of the optical signal to be used for calculating the insertion loss of the current node.

Step S408, determining whether the deviation of the current node insertion loss from the reference node insertion loss is greater than or equal to a second predetermined threshold.

The second predetermined threshold may be the same as or different from the first predetermined threshold above, for example, the second predetermined threshold may be preset to 1 dB. That is, in this step, it is determined whether the current node insertion loss is outside the range of the reference node insertion loss ± 1dB, or equal to the reference node insertion loss ± 1 dB. As shown in fig. 4, if the determination result is yes, it is determined that the own node is to be debugged, and the flow proceeds to step S410, where the own node is debugged, and if the determination result is no, it is considered that the deviation of the output power is not caused by the deterioration of the own node and may be caused by the deterioration of the upstream node of the own node or the optical fiber, and therefore, it is determined that the own node is not to be debugged, and the flow returns to execute step S404, and a new cycle is started. Whether the node is debugged or not is determined based on the insertion loss of the current node of the node, so that invalid debugging under the condition that the deviation of the output power is not caused by the degradation of the node is avoided, and the debugging efficiency is improved.

In step S410, the optical network node is debugged so that λ₃The deviation of the output power of the optical signal from the target output power is less than a first predetermined threshold.

After determining to perform the adjustment measurement on the local node, the control device 1 sends adjustment information (e.g., an instruction) to the optical power adjuster in the optical network node to instruct the corresponding optical power adjuster to perform the power adjustment on the optical signal.

The second predetermined threshold is for example 1 dB. In one case, the current node insertion loss is greater than or equal toInsertion loss at the reference node is +1dB, that is, the insertion loss of the current node is large, thereby resulting in λ₃The output power of the optical signal is small compared to the target output power. In this case, it is desirable to reduce the pair λ in the optical path from OA1 to OA2₃And (4) insertion loss of optical signals. Referring to fig. 2 and 3, in the optical path from OA1 to OA2, control device 1 may instruct VOA3 in WSS1 to reduce pairs λ₃Attenuation of the optical signal, or the control device 1 may indicate the sum λ in the WSS2₃VOA reduction pair lambda corresponding to optical signal₃Attenuation of the optical signal, or the control device 1 may instruct both of the above-mentioned VOA-reducing pairs lambda simultaneously₃Attenuation of optical signals to reduce λ in the optical path from OA1 to OA2₃And (4) insertion loss of optical signals. For example, the insertion loss value that needs to be reduced may be determined by calculating the difference between the target output power and the output power.

In one case, the current node insertion loss is less than or equal to the reference node insertion loss-1 dB, i.e., the current node insertion loss is small, resulting in λ₃The output power of the optical signal is large compared to the target output power. In this case, it is necessary to increase the pair λ in the optical path from OA1 to OA2₃And (4) insertion loss of optical signals. Referring to fig. 2 and 3, in the optical path from OA1 to OA2, control device 1 may instruct VOA3 in WSS1 to increase the pair λ₃Attenuation of the optical signal, or the control device 1 may indicate the sum λ in the WSS2₃VOA increase pair lambda corresponding to optical signal₃Attenuation of the optical signal, or the control device 1 may instruct both VOA increase pairs λ simultaneously₃Attenuation of optical signals to increase λ in the optical path from OA1 to OA2₃And (4) insertion loss of optical signals. For example, the insertion loss value that needs to be increased may be determined by calculating the difference between the output power and the target output power.

After step S410 is completed, the flow returns to step S404, i.e., a new cycle is started again.

In the above with respect to λ in the optical path from OA1 to OA2 to ROADM1 node₃The method for self-calibration of an optical network node provided in the embodiment of the present application is described in the example of tuning and testing an optical signal, and the embodiment of the present application is not limited thereto.

Fig. 5 is a flowchart of another optical network node commissioning method according to an embodiment of the present application, where the method is executed by the control device 1.

Similarly to the above, the control device 1 first receives the target output power of each single-wave optical signal at the local drop port from the service terminal before executing the method. The relative λ of the optical path from OA1 to OPM3 in the ROADM1 node will be described below₂The method of conditioning the optical signal is exemplified.

As shown in fig. 5, the testing method includes the following steps S502-S510.

First, in step S502, λ is acquired₂Reference node insertion loss of the optical signal.

Control device 1 receiving λ₂After the target output power of the optical signal at the drop port, the control device 1 instructs the OPM1 and OPM3 to proceed with the pair λ, respectively₂Measurement of input power and output power of the optical signal, thereby obtaining λ similarly to step S402₂Reference single-wave insertion loss of the optical signal.

In step S504, λ is acquired₂The current output power of the optical signal.

Specifically, the control device 1 may issue an instruction to the OPM3 to instruct the OPM3 to make a pair λ₂Measurement of the power of the optical signal, so that λ can be obtained from OMP3₂The current output power of the optical signal.

Step S506, in the case that the deviation of the current output power relative to the target output power is greater than or equal to the first predetermined threshold, calculating lambda₂The current node insertion loss of the optical signal.

Similarly to step S406, the control device 1 may be based on λ measured by the OPM1₂Optical power of the optical signal is P1, and λ measured by OPM3₂The optical power of the optical signal is P2, and λ in the path from OA1 to OPM3 is obtained₂The current node insertion loss of the optical signal.

Step S508, determining whether the deviation of the current node insertion loss from the reference node insertion loss is greater than or equal to a second predetermined threshold.

Similarly to step S408, as shown in fig. 5, if the determination result is yes, the process proceeds to step S510, and the node is measured, and if the determination result is no, the deviation of the output power is not caused by the deterioration of the node and may be caused by the deterioration of the upstream node or the optical fiber of the node, so that the node is not measured, and the process returns to step S504 to start a new cycle.

Step S510, debugging and testing the optical network node to enable lambda₂The deviation of the output power of the optical signal from the target output power is less than a first predetermined threshold.

This step may be referred to the above description of step S410 and will not be described in detail here.

After completion of step S510, the flow returns to step S504, i.e., a new cycle is started again.

Fig. 6 is a flowchart of another optical network node commissioning method provided in the embodiment of the present application, where the method is executed by the control device 1.

Similarly to the above, the control device 1 first receives the target output power of each of the single-wave optical signals from the service terminal before executing the method. The relative λ of the optical path from OPM4 to OA2 in the ROADM1 node will be described below₈The method of conditioning the optical signal is exemplified.

As shown in fig. 6, the testing method includes the following steps S602-S610.

First, in step S602, λ is acquired₈Reference node insertion loss of the optical signal.

Control device 1 receiving λ₈After the target output power of the optical signal, the control device 1 instructs the OPM4 and the OPM2 to perform the pair λ respectively₈Measurement of input power and output power of the optical signal, thereby obtaining λ similarly to step S402₈Reference single-wave insertion loss of the optical signal.

In step S604, λ is acquired₈The current output power of the optical signal.

Step S606, in case the deviation of the current output power from the target output power is greater than or equal to the first predetermined threshold, calculatingλ₈The current node insertion loss of the optical signal.

Similarly to step S406, the control device 1 may be based on λ measured by the OPM4₈Optical power of the optical signal is P1, and λ measured by OPM2₈Optical power P2 of the optical signal, obtaining lambda in the path from OPM4 to OA2₈The current node insertion loss of the optical signal.

In step S608, it is determined whether the deviation of the current node insertion loss from the reference node insertion loss is greater than or equal to a second predetermined threshold.

Similarly to step S408, as shown in fig. 6, if the determination result is yes, the process proceeds to step S610, and the node is measured, and if the determination result is no, the deviation of the output power is not caused by the deterioration of the node and may be caused by the deterioration of the upstream node of the node or the optical fiber, so that the node is not measured, and the process returns to step S604, and a new cycle is started.

Step S610, debugging and testing the optical network node to enable lambda₈The deviation of the output power of the optical signal from the target output power is less than a first predetermined threshold.

This step may be referred to the above description of step S410 and will not be described in detail here.

After completion of step S610, the flow returns to step S604, i.e., a new cycle is started again.

Although the optical network node self-regulation scheme provided by the embodiment of the present application is described above by taking a ROADM optical network as an example, it can be understood that the scheme provided by the embodiment of the present application is not limited to be used in the ROADM optical network, but may be used in other optical networks that monitor node output power.

The optical network node self-regulation and measurement scheme of the embodiment of the application is not limited to power regulation and measurement relative to each single wave in the combined wave transmitted by the optical network node, and can also carry out power regulation and measurement relative to the combined wave optical signal. Specifically, under the condition that all wavelength optical signals in the combined optical signal are output from the same output port of the optical network node, the node control device in the optical network node obtains the reference node insertion loss of the combined optical signal after obtaining the target output power of the combined optical signal. Then, the node control device monitors the output power of the combined optical signal, acquires the current node insertion loss of the combined optical signal when the deviation of the output power of the combined optical signal from the target output power is greater than or equal to a first predetermined threshold, and determines whether the deviation of the current node insertion loss from the reference node insertion loss is greater than or equal to a second predetermined threshold. When the deviation of the current node insertion loss from the reference node insertion loss is greater than or equal to a second predetermined threshold, the node control device may instruct the OA in the node to perform power adjustment on the composite optical signal, or may instruct the VOA set in the node for the composite optical signal to perform power adjustment on the composite optical signal.

The optical network node provided by the embodiment of the application is not limited to include the WSS including the VOA, and may include other optical devices. For example, when the optical network transmits only a single-wave optical signal, there is no need to set a WSS in the node, and a VOA or OA may be set between the input port and the output port of the node for adjusting power to the single-wave optical signal. In the case where the optical network node is a two-dimensional optical network node, for example, the optical network node transmits optical signals in the east-west direction, one demultiplexer and one multiplexer may be disposed in the optical path, and VOAs corresponding to the respective wavelengths may be disposed between the demultiplexer and the multiplexer, so as to adjust power of the optical signals of the respective wavelengths.

In addition, the adjustment of the single-wave power through the VOA is not limited in the embodiments of the present application, and the adjustment of the single-wave power may be achieved by controlling the enabling and disabling of a predetermined number of fixed power attenuators in the single-wave optical path, for example.

Fig. 7 is a schematic diagram of an optical network node control device 700 according to an embodiment of the present application. As shown in fig. 7, the control apparatus 700 includes:

a first obtaining unit 71, configured to obtain a target output power and a current output power of an optical signal, where the current output power is a power of the optical signal at an output side of the optical network node;

a second obtaining unit 72, configured to obtain a current node insertion loss of the optical signal when a deviation of the current output power from the target output power is greater than or equal to a first predetermined threshold;

a determination unit 73 configured to determine whether a deviation of the current node insertion loss from a reference node insertion loss is greater than or equal to a second predetermined threshold;

a determining unit 74, configured to determine whether to debug the optical network node based on a result of the determination.

In one embodiment, the determining unit 74 is further configured to: when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to debug the optical network node; or when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be smaller than the second preset threshold value, the optical network node is not debugged.

In one embodiment, the optical network node includes at least one optical power adjuster, wherein the determining unit 74 is further configured to: when the deviation of the current node insertion loss relative to the reference node insertion loss is judged to be larger than or equal to the second preset threshold value, determining to adjust the at least one optical power adjuster

In one embodiment, the node control device stores in advance a target output power of the optical signal at the output side of the optical network node and/or a reference node insertion loss of the optical signal.

In one embodiment, the reference node insertion loss is obtained based on at least one node insertion loss in an optical network node, the at least one node insertion loss being obtained when the output power of the optical signal deviates from the target output power by less than the first predetermined threshold.

In one embodiment, the second obtaining unit 72 is further configured to: and obtaining a difference value between the current output power and the current input power, wherein the current input power is the current power of the optical signal at the input side of the optical network node.

In an embodiment, the apparatus 700 further includes a sending unit 75, configured to send, after determining to perform the adjustment measurement on the optical network node, adjustment information to the at least one optical power adjuster, where the adjustment information is used to instruct the at least one optical power adjuster to perform power adjustment on the optical signal.

Fig. 8 is a schematic diagram of an optical network node control device 800 according to an embodiment of the present application. As shown in fig. 8, the control device 800 comprises a memory 81 in which a computer program or instructions are stored, a processor 82 for executing the computer program or instructions to implement any of the methods described above, and a communication interface 83.

Wherein the memory 81 may be used to store software programs and modules, and the processor 82 causes the optical network node controlling device 800 to execute the method as shown in any one of fig. 4-6 by running the software programs and modules stored in the memory 81. The memory 81 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, application programs required to implement the above-described method, and the like. The storage data area may store a configuration file of an application, etc. Further, the memory 81 may be a volatile memory (volatile memory), such as a random-access memory (RAM); the memory 81 may also be a non-volatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory 81 may also comprise a combination of memories of the kind described above.

The processor 82 is a control center of the device 800, connects various parts of the entire device 800 by using various interfaces and lines, and executes the optical network node commissioning method according to the embodiment of the present application by running or executing software programs and/or modules stored in the memory 81 and calling data stored in the memory 81. The communication interface 83 is used for communicating with an optical network node.

Another aspect of the present application provides an optical network node, where the optical network node includes an optical network node control device shown in fig. 7 or fig. 8 and at least one adjusting device, where the at least one adjusting device is configured to perform power adjustment on an optical signal when receiving adjustment information of the optical network node control device.

Another aspect of the application provides a computer-readable storage medium having stored thereon a computer program or instructions which, when executed in a computer, cause the computer to perform the method as shown in any one of fig. 4-6.

Another aspect of the application provides a computer program product comprising a computer program or instructions which, when executed by a computer, implements a method as shown in any of figures 4-6.

It is to be understood that the terms "first," "second," and the like, herein are used for descriptive purposes only and not for purposes of limitation, to distinguish between similar concepts.

It will be further appreciated by those of ordinary skill in the art that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.