CN114978302A

CN114978302A - Optical performance adjusting and testing method and device and optical communication system

Info

Publication number: CN114978302A
Application number: CN202110221661.7A
Authority: CN
Inventors: 李萍; 范明惠; 廖永强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-02-27
Filing date: 2021-02-27
Publication date: 2022-08-30

Abstract

The application discloses an optical performance debugging method, an optical performance debugging device and an optical communication system, aiming at improving the efficiency and performance of optical network node debugging. The method comprises the following steps: the centralized control unit determines the debugging information and sends the debugging information to the optical network node. Correspondingly, the optical network node receives the debugging information from the centralized control unit, wherein the debugging information comprises a step length debugging strategy; the optical network node determines a first debugging step length according to the step length debugging strategy and debugs the main optical path combined wave according to the first debugging step length; and/or the optical network node determines a second debugging step length according to the step length debugging strategy and debugs the single wave according to the second debugging step length.

Description

Optical performance adjusting and testing method and device and optical communication system

Technical Field

The embodiment of the application relates to the technical field of optical communication, in particular to an optical performance adjusting and measuring method, an optical performance adjusting and measuring device and an optical communication system.

Background

The optical network includes a plurality of nodes, each node has a single board, for example, the node includes a single board such as an optical conversion unit, an optical amplifier, and a wavelength selective switch connected by an optical fiber in the node, and different nodes are connected by an optical fiber between the nodes. 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. And adjusting and measuring the gain or single wave attenuation of the optical amplifier in the optical network node. The main light path combined wave can be adjusted and measured through adjustment and measurement information of optical amplifier gain and adjustment and measurement information of Electronic Variable Optical Attenuator (EVOA) attenuation. The degraded transmission performance can be recovered by the above-described tuning.

How to improve the efficiency and performance of the optical network node debugging is a problem to be considered.

Disclosure of Invention

The embodiment of the application provides an optical performance debugging method, an optical performance debugging device and an optical communication system, so as to improve the efficiency and performance of optical network node debugging.

In a first aspect, a method for tuning optical performance is provided, the method comprising the steps of: the centralized control unit determines the debugging information and sends the debugging information to the optical network node. Correspondingly, the optical network node receives the debugging information from the centralized control unit, wherein the debugging information comprises a step length debugging strategy; the optical network node determines a first debugging step length according to the step length debugging strategy and debugs the main optical path composite wave according to the first debugging step length; and/or determining a second modulation step length according to the step length modulation strategy, and modulating and measuring the single wave according to the second modulation step length.

The optical network node is any node governed by the centralized control unit. The centralized control unit issues a step length adjusting and measuring strategy to the optical network node, the optical network node or a single station determines the adjusting and measuring step length by itself, and adjusts and measures the combined wave and/or the single wave. The centralized control unit is not required to uniformly and definitely determine the debugging strategy and send the strategy to each optical network node, but the optical network node determines the debugging step length by itself, so that the operation content of the centralized control unit can be simplified, the optical network node is not required to return the response of debugging to the centralized control unit, and the debugging efficiency and the debugging performance are improved. And the optical network node is adjusted and tested by itself, so that the adjusting and testing speed can be improved, the second-level adjusting and testing can be achieved, the bottleneck of the minute-level adjusting and testing performance of the centralized adjusting and testing scheme is broken, the power of the system can be balanced more quickly, and the adjusting and testing performance is improved. And the centralized control unit issues the debugging information, so that a synergistic effect can be achieved among all network elements, and the debugging safety is ensured. The method can realize the optimized debugging method of centralized and distributed cooperation. The method can be suitable for a wave adding scene, for example, when a new wave is added, the new wave has certain influence on the performance of an old wave, and by adopting the method, the centralized and distributed cooperative optimization debugging and testing can improve the debugging and testing performance and ensure the debugging and testing safety. The method can also be applied to the wave dropping scene. By adopting the method, the debugging performance can be improved and the debugging safety can be ensured.

In one possible design, the commissioning information further includes one or more of the following: the identification of the optical network node, the total optical amplifier gain adjustment amount, the total optical attenuation adjustment amount, the channel identification of the wave to be measured, the identification of the single wave and the total adjustment amount of the single wave.

In one possible design, the optical network node locks the optical power of the single wave. To prevent impact on downstream traffic.

In one possible design, the method further includes: when the set conditions are met, the optical network node conducts debugging and testing on the optical performance; the setting conditions include: the difference between the output power of the collected optical signal and the target output power exceeds a third threshold, and/or the degradation value of the insertion loss of the optical network node exceeds a fourth threshold. The optical power of the optical layer service can be adjusted in the daily operation and maintenance process of the optical network node, and the optical path is optimally adjusted and tested.

In one possible design, the optical signal includes the main optical path composite and/or the single wave.

In one possible design, the insertion loss of the optical network node includes intra-station insertion loss and/or inter-station insertion loss, and the inter-station insertion loss is insertion loss between the optical network node and other optical network nodes.

In one possible design, monitoring OTU bit error rate BER information of an optical transmission network element, wherein the BER information is used for judging the debugging and testing safety of a first service, and the first service is a service corresponding to the main optical path combined wave or the single wave; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the first service. Therefore, the BER information can be carried to the upstream network element related to the optical layer service according to the channel associated protocol, so that the upstream network element can judge the safety of the current regulation and measurement, and further regulation and measurement processing can be carried out.

In one possible design, the OTU single board is taken as a destination, and an optical fiber interface unit FIU corresponding to an inter-site optical fiber is determined based on the physical port topology and/or the cross information of the first service of the optical network node; determining the OSC single plate connected with the FIU; and transmitting the BER information to a network element associated with the first service through an OLS _3 byte of the OSC single plate.

In one possible design, receiving BER information from a downstream network element, wherein the BER information is used for judging the debugging safety of the first service; determining a second service associated with the first service; transmitting the BER information to an upstream network element of the optical network node based on a transmission path of the first service; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the second service.

In a possible design, the optical output nodes of the second service and the first service are the optical network nodes, the optical input node of the first service is a first upstream network element of the optical network nodes, and the optical input node of the second service is a second upstream network element of the optical network nodes.

In one possible design, the step size tuning strategy includes one or more of:

(1) the optical network node associated with the optical multiplexing section OMS is debugged according to the set step length; the set step length may be the minimum value of the adjustable step length range of the optical network node associated with the OMS; and the adjustment and the measurement are carried out according to the minimum value of the adjustable step length range, the influence on other waves is small, and the safety is high.

The set step size may also be the maximum value of the range of adjustable step sizes of the optical network node associated with the OMS. The larger the debugging step length is, the faster the service recovery is, and the service can be recovered quickly in a scene with high margin.

(2) The sum of the debugging step lengths of all services to be debugged and associated with the OMS on one optical network node does not exceed a first threshold value; since the debugging of the optical network nodes through which the service to be debugged passes is not simultaneously effective, the service security of other nodes can be influenced if the sum of the debugging step length on one optical network node is too large, and the service security can be ensured by the limitation of the first threshold value.

(3) The accumulated debugging step length of all optical network nodes passing by the service to be debugged in the same debugging direction does not exceed a second threshold value. Since the debugging of the optical network nodes through which the service to be debugged passes is not simultaneously effective, if only the debugging in the same debugging direction is effective and the debugging in the opposite debugging direction is not effective, service interruption may be caused by an excessively large debugging value in the same debugging direction, and this situation can be avoided by the limitation of the second threshold value, thereby contributing to ensuring the security of the service.

In a second aspect, an optical performance tuning and measuring apparatus is provided, which is applied to an optical network node, and includes: the receiving module is used for receiving debugging information from the centralized control unit, wherein the debugging information comprises a step length debugging strategy; the processing module is used for determining a first debugging step length according to the step length debugging strategy and debugging the main optical path combined wave according to the first debugging step length; and/or determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

In one possible design, the processing module is further configured to: and locking the optical power of the single wave.

In one possible design, the processing module is further configured to: when the set conditions are met, adjusting and testing the optical performance; the setting conditions include: the difference between the output power of the collected optical signal and the target output power exceeds a third threshold, and/or the degradation value of the insertion loss of the optical network node exceeds a fourth threshold.

In one possible design, the processing module is further configured to: monitoring OTU bit error rate BER information of an optical transmission network element, wherein the BER information is used for judging the debugging and testing safety of a first service, and the first service is a service corresponding to the main optical path combined wave or the single wave; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the first service.

In one possible design, the processing module is further configured to: determining an optical fiber interface unit FIU corresponding to an optical fiber between sites based on the physical port topology and/or the cross information of the first service of the optical network node by taking the OTU single board as a destination; determining the OSC single board connected with the FIU; and transmitting the BER information to a network element associated with the first service through an OLS _3 byte of the OSC single plate.

In one possible design, the receiving module is further configured to receive BER information from a downstream network element, the BER information being used to determine the security of the commissioning of the first service; the processing module is further configured to: determining a second service associated with the first service; transmitting the BER information to an upstream network element of the optical network node based on a transmission path of the first service; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the second service.

In a third aspect, an optical performance tuning and measuring apparatus applied to a centralized control unit is provided, including: the processing module is used for determining debugging information, wherein the debugging information comprises a step length debugging strategy, and the step length debugging strategy is used for an optical network node to determine a first debugging step length for debugging the main optical path combined wave and a second debugging step length for debugging the single wave; and the sending module is used for sending the debugging information to the optical network node.

In one possible design, the step size tuning strategy includes one or more of: the optical network node associated with the optical multiplexing section OMS is debugged according to the set step length; or, the sum of the debugging step lengths of all the services to be debugged associated with the OMS on one optical network node does not exceed a first threshold value; or, the accumulated debugging step length of all optical network nodes passing by the service to be debugged in the same debugging direction does not exceed the second threshold value.

The beneficial effects of the second and third aspects may refer to the description of the first aspect, and are not described herein again.

In a fourth aspect, an embodiment of the present application further provides an apparatus, which may be an optical network node, configured to implement the method performed by the optical network node described in the first aspect; the apparatus may also be other apparatuses capable of supporting the optical network node to implement the optical network node executing method described in the first aspect, for example, an apparatus that may be disposed in the optical network node. The optical network node may be a chip system, a module, a circuit, or the like disposed in the optical network node, and this is not particularly limited in this application. The apparatus comprises a processor and a communication interface for performing the functions of the optical network node to perform the operations in the method described in the first aspect above. The apparatus may also include a memory for storing program instructions and data. The memory is coupled to the processor, and the processor invokes and executes program instructions stored in the memory, so as to implement the functions of the optical network node in the method described in the first aspect. The communication interface is used for the device to communicate with other equipment. Illustratively, the other device is a centralized control unit. In the embodiments of the present application, the communication interface may include a circuit, a bus, an interface, a communication interface, or any other device capable of implementing a communication function.

In a fifth aspect, an embodiment of the present application further provides an apparatus, which may be a centralized control unit, configured to implement the method performed by the centralized control unit described in the first aspect; the apparatus may also be other apparatuses capable of supporting the centralized control unit to implement the method performed by the centralized control unit described in the first aspect, for example, an apparatus that may be disposed in the centralized control unit. The present invention may be a system-on-chip, a module, a circuit, or the like provided in a centralized control unit, which is not particularly limited in this application. The apparatus comprises a processor and a communication interface for implementing the functions of the centralized control unit performing the operations in the method described in the first aspect. The apparatus may also include a memory for storing program instructions and data. The memory is coupled to the processor, and the processor calls and executes the program instructions stored in the memory, so as to implement the functions of the centralized control unit in the method described in the first aspect. The communication interface is used for the device to communicate with other equipment. Illustratively, the other device is an optical network node. In the embodiments of the present application, the communication interface may include a circuit, a bus, an interface, a communication interface, or any other device capable of implementing a communication function.

In a sixth aspect, this embodiment of the present application further provides a computer storage medium, where a software program is stored, and when the software program is read and executed by one or more processors, the operations performed by the optical network node in the method according to the first aspect or any design of the first aspect may be implemented.

In a seventh aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and the processor includes a memory, or the processor may include a memory, and is configured to implement the functions of the optical network node or the centralized control unit in the foregoing method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In an eighth aspect, an embodiment of the present application provides an optical communication system, where the optical communication system includes a centralized control unit and one or more optical network nodes. Any of the optical network nodes and the centralized control unit are configured to perform the method according to the first aspect or any design of the first aspect.

For example, the centralized control unit is configured to determine tuning information, where the tuning information includes a step-size tuning strategy, where the step-size tuning strategy is used by the one or more optical network nodes to determine a first tuning step size for tuning the main optical path combined wave, and is used by the one or more optical network nodes to determine a second tuning step size for tuning the single wave;

the centralized control unit is also used for sending the debugging and testing information to the one or more optical network nodes;

the one or more optical network nodes are used for receiving the debugging information from the centralized control unit;

the one or more optical network nodes are further configured to determine a first tuning step length according to the step length tuning strategy, and tune and measure the main optical path combined wave according to the first tuning step length; and/or determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

In a ninth aspect, embodiments of the present application provide a computer program product comprising instructions that, when run on a computer, cause the method of the first aspect or any design of the first aspect to be implemented.

In the embodiment of the application, the centralized control unit issues the step length adjusting and measuring strategy to the optical network node, the optical network node or the single station determines the adjusting and measuring step length, and adjusts and measures the combined wave and/or the single wave. The centralized control unit is not required to uniformly and definitely determine the debugging strategy and issue the strategy to each optical network node, but the optical network nodes determine the debugging step length by themselves, so that the operation content of the centralized control unit can be simplified, the optical network nodes are not required to return a response of debugging to the centralized control unit, and the debugging efficiency and the debugging performance are improved. And the optical network node is adjusted and tested by itself, so that the adjusting and testing speed can be improved, the second-level adjusting and testing can be achieved, the bottleneck of the minute-level adjusting and testing performance of the centralized adjusting and testing scheme is broken, the power of the system can be balanced more quickly, and the adjusting and testing performance is improved. And the centralized control unit issues the debugging information, so that the synergistic effect among all network elements can be achieved, and the debugging safety is ensured. By the centralized and distributed cooperative optimization debugging and testing method, debugging and testing performance can be improved and debugging and testing safety can be guaranteed.

Drawings

Fig. 1 is a schematic diagram of an optical communication system in an embodiment of the present application;

FIG. 2 is a schematic flow chart of an optical performance testing method according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a wave adding scenario in an embodiment of the present application;

FIG. 4 is a second flowchart of a method for testing optical performance according to an embodiment of the present application;

FIG. 5 is a schematic model diagram of a single OMS segment in an embodiment of the present application;

FIG. 6 is a third schematic flow chart of an optical performance testing method according to an embodiment of the present application;

FIG. 7 is a fourth schematic flowchart of a method for adjusting and measuring optical performance according to an embodiment of the present application;

fig. 8 is a diagram illustrating BER information transferred based on a channel associated protocol in an embodiment of the present application;

fig. 9 is a second schematic diagram illustrating BER information transferred based on a channel associated protocol in an embodiment of the present application;

fig. 10 is a third schematic diagram illustrating BER information transferred based on a channel associated protocol in an embodiment of the present application;

FIG. 11 is a schematic structural diagram of an optical performance measurement apparatus according to an embodiment of the present disclosure;

fig. 12 is a second schematic structural diagram of an optical performance measuring apparatus according to an embodiment of the present application.

Detailed Description

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

The scheme provided by the application can be applied to optical communication networks, such as Dense Wavelength Division Multiplexing (DWDM) optical networks, and reconfigurable optical add-drop multiplexer (ROADM) optical networks. Optical communication networks include optical communication systems that may be applied in various communication scenarios. 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, town 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.

For the understanding of the embodiments of the present application, an optical communication system suitable for the embodiments of the present application will be described first with reference to fig. 1. Fig. 1 is a schematic diagram of a system architecture suitable for the method provided by the embodiment of the present application. It should be understood that the optical communication system architecture shown in fig. 1 is merely exemplary for understanding, and should not be construed to limit the scope of the application.

As shown in fig. 1, the optical communication system includes a centralized control unit 110 and an optical network node 120. The number of the optical network nodes 120 may be one or more, and is illustrated by taking 3 optical network nodes as an example in fig. 1.

The centralized control unit 110 is connected to one or more optical network nodes 120 under jurisdiction. The centralized control unit 110 may be configured to: and receiving the service optical performance data sent by the one or more optical network nodes, determining debugging information according to the service optical performance data sent by the one or more optical network nodes, and sending the debugging information to the one or more optical network nodes. The centralized control unit 110 may be specifically configured to: acquiring and managing debugging data according to the real-time topological relation and the real-time optical power of the network; modeling the optical performance physical parameters, calculating the target optical power of the service to be regulated and tested, the regulating quantity of each point of the service to be regulated and the affected service and the regulating strategy of each network element; and issuing the regulation strategy and the regulation total amount to each optical network node for each optical network node to carry out single-station regulation and measurement. The centralized control unit may also be referred to by other names, such as a centralized management unit, a centralized management system, and is not limited in this application. The centralized control unit may be deployed on a network element device or a server with a relatively high capability.

Optical signals may be transmitted between the optical network nodes 120 through inter-network element communication channels, which may be optical links, for example, the optical links may be optical fibers. 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 120 may include an optical add-drop multiplexer (OADM) or an optical cross-connect (OXC) device. 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 Module (ROADM) is a reconfigurable OADM.

In an optical communication system, optical layer services can be transmitted between optical network nodes through communication channels between network elements. In the embodiment of the present application, the optical layer service may also be referred to as an optical service, a service, or an optical wave service. The optical layer service may be carried on an optical wave, that is, an optical network node transmits an optical wave to another optical network node, and the optical wave carries the service. Each optical wave may correspond to a channel, and the service is carried in the optical wave on the channel. Light waves may include both new and old waves. The new wave is the new optical wave, and compared with the new optical wave, the existing channel on the rerouting or expansion optical path is the old wave. The new wave will have an impact on the performance of the old wave. Based on this, an embodiment of the present application provides one of optical performance tuning methods, which can be implemented based on the optical communication system shown in fig. 1. The method can improve the efficiency and performance of debugging and testing on the premise of ensuring the safety of old waves when new waves are transmitted.

As shown in fig. 2, a specific flow of one of the optical performance tuning methods provided in the embodiments of the present application is as follows.

S201, the centralized control unit determines and sends the debugging information to one or more optical network nodes, and correspondingly, the one or more optical network nodes receive the debugging information from the centralized control unit.

For convenience of illustration, fig. 2 illustrates 2 optical network nodes, which is merely an example, and in practical applications, there may be more or less optical network nodes.

And the debugging information comprises a step length debugging strategy. The step size tuning strategy is a strategy for determining the tuning step size.

After receiving the commissioning information, any optical network node in the one or more optical network nodes may perform S202a-S203a, may also perform S202b-S203b, and may also perform S202a-S203a and S202b-S203 b. Or after receiving the tuning information, any one of the one or more optical network nodes may tune the combined wave according to the tuning information, may tune the single wave according to the tuning information, and may tune the combined wave and the single wave according to the tuning information. The regulation of the synthetic wave can be realized through S202a-S203a, and the regulation of the single wave can be realized through S202b-S203 b.

In the following description of the operation of the optical network node, the optical network node is any one of the one or more optical network nodes.

S202a, the optical network node determines a first debugging step length according to the step length debugging strategy.

And S203a, the optical network node carries out debugging on the main optical path combined wave according to the first debugging step length.

S202b, the optical network node determines a second debugging step length according to the step length debugging strategy.

And S203b, the optical network node conducts debugging on the single wave according to the second debugging step length.

It should be noted that the optical network node is any node governed by the centralized control unit. In a centralized regulation and measurement scheme, after service degradation reaches an alarm threshold, optimized regulation and measurement is started, the regulation and measurement principle is that a centralized control unit performs centralized calculation, the centralized control unit issues calculation results to a plurality of optical network nodes in parallel, and service Bit Error Rate (BER) is inquired in a centralized manner after the accumulated regulating quantity is regulated and measured. The centralized debugging and testing scheme is characterized in that a centralized brain unifies and determines debugging and testing strategies, the cooperative debugging and testing of each single station is controlled in a centralized mode, safety is good, parallel debugging and testing are relatively conducted in a serial mode, debugging and testing performance is improved from an hour level to a minute level, however, the debugging and testing performance is still limited, and debugging and testing control are complex. In a distributed debugging scheme, a target baseline value is led in through a planning tool, and debugging is triggered after the difference value between the single-wave light power and the target baseline exceeds a threshold. Adjusting and measuring principles: and (4) single-station control of the equipment, wherein the single-wave attenuation is adjusted only when the interpolation loss change in the station exceeds the limit, so that the actual single-wave power of the outgoing station is matched with the target power. The distributed debugging scheme has the advantages that the distributed debugging speed of the equipment is high, the second-level debugging can be achieved, the power of the system can be balanced more quickly, the single-station debugging can work normally under the condition that the network element is trusteeship or the U2000 is down, but the equipment is controlled by a single station, the debugging and the testing of each network element are not coordinated, and the debugging and the testing safety is poor.

Through the embodiment of fig. 2, the centralized control unit issues the step length adjusting and measuring strategy to the optical network node, the optical network node or the single station determines the adjusting and measuring step length by itself, and adjusts and measures the combined wave and/or the single wave. The centralized control unit is not required to uniformly and definitely determine the debugging strategy and send the strategy to each optical network node, but the optical network node determines the debugging step length by itself, so that the operation content of the centralized control unit can be simplified, the optical network node is not required to return the response of debugging to the centralized control unit, and the debugging efficiency and the debugging performance are improved. And the optical network node is adjusted and tested by itself, so that the adjusting and testing speed can be improved, the second-level adjusting and testing can be achieved, the bottleneck of the minute-level adjusting and testing performance of the centralized adjusting and testing scheme is broken, the power of the system can be balanced more quickly, and the adjusting and testing performance is improved. And the centralized control unit issues the debugging information, so that the synergistic effect among all network elements can be achieved, and the debugging safety is ensured. The method of the embodiment of fig. 2 can realize the centralized and distributed cooperative optimization debugging method. The method can be applied to a wave adding scene, and wave adding can mean adding new services. When a new wave comes, the new wave has a certain influence on the performance of the old wave, and the centralized and distributed cooperative optimization debugging and testing method shown in fig. 2 is adopted, so that the debugging and testing performance can be improved, and the debugging and testing safety can be ensured. The method can also be applied to the wave dropping scene. By adopting the centralized and distributed cooperative optimization debugging and testing method shown in fig. 2, the debugging and testing performance can be improved and the debugging and testing safety can be ensured.

Some alternative implementations of the embodiment of fig. 2 are described below.

The step-size tuning strategy is explained below. The step size adjustment strategy may be a combination of any one or more of the following:

(1) and (3) debugging and measuring an optical network node associated with an Optical Multiplex Section (OMS) according to a set step length.

The set step size may be the minimum of the range of adjustable step sizes of the optical network node associated with the OMS. The adjustable measurement step size range of the optical network node may be determined empirically, and the minimum value of the adjustable measurement step size range may be, for example, 0.2 db. And the adjustment and the measurement are carried out according to the minimum value of the adjustable step length range, the influence on other waves is small, and the safety is high. Because the BER can be obtained within a certain time after the service is regulated and tested, the optical network node can be quickly regulated and tested according to the minimum step length, and after the total regulating and testing amount is accumulated, the optical network node waits for a certain time and then judges whether the monitored service is abnormal or not, thereby improving the regulating and testing efficiency. For example, the monitored traffic is judged to be abnormal by 0.2db of debugging, 0.6db of accumulative debugging and delay of about 4 s.

(2) The sum of the debugging step lengths of all the services to be debugged and associated with the OMS on one optical network node does not exceed a first threshold value. Since the debugging of the optical network nodes through which the service to be debugged passes is not simultaneously effective, the service security of other nodes can be influenced if the sum of the debugging step length on one optical network node is too large, and the service security can be ensured by the limitation of the first threshold value.

(3) The accumulated debugging step length of all optical network nodes passing by the service to be debugged in the same debugging direction does not exceed a second threshold value. Since the debugging and testing of the optical network nodes through which the service to be debugged passes are not simultaneously effective, if only the debugging and testing in the same debugging and testing direction is effective and the debugging and testing in the opposite debugging and testing direction is not effective, service interruption caused by overlarge debugging and testing values in the same debugging and testing direction can be caused, and the situation can be avoided by setting the second threshold value, so that the service safety can be ensured.

Besides the step length adjusting strategy, the adjusting and measuring information may also include one or more of the following information:

the method comprises the steps of identification of optical network nodes, total optical amplifier gain adjustment amount, total optical attenuation adjustment amount, channel identification of waves to be measured, identification of single waves and total adjustment amount of the single waves.

The centralized control unit can govern one or more optical network nodes, when wave adding or wave dropping exists in an optical network, the centralized control unit identifies an affected OMS section, calculates Optical Signal Noise Ratio (OSNR) LOSS (LOSS) of a service related to the affected OMS section, calculates OSNR LOSS balancing target optical power of the service, and calculates debugging information of the service to be debugged and measured and the affected service of each optical network node, wherein the debugging information comprises the debugging total amount of the main optical path combined wave and the debugging total amount of the single wave. The commissioning information also includes commissioning policies. The OSNR is an index for evaluating the quality of an optical signal, and the larger the OSNR is, the better the quality of the optical signal is, and the smaller the OSNR is, the worse the quality of the optical signal is.

The centralized control unit can respectively send the debugging information to one or more optical network nodes, and according to the identification of the optical network nodes, the optical network nodes can determine whether the debugging information is the own debugging information. The tuning information includes tuning information of the combined wave, which may be tuning information of the optical amplifier gain and tuning information of the Electronic Variable Optical Attenuator (EVOA) attenuation. The tuning information of the optical amplifier gain may include, for example, an optical amplifier gain adjustment total amount, an adjustment point, and a tuning strategy. The measurement strategy may be a step measurement strategy, such as the step measurement strategies (1) to (3) described above. The modulation information for the attenuation of the EVOA may include, for example, the total amount of light attenuation modulation, the modulation point, and the modulation strategy. The measurement policy may be a step measurement policy, such as the step measurement policies (1) to (3).

The modulation and measurement information also includes modulation and measurement information of a single wave, and the modulation and measurement information of the single wave may include a channel number of a wave to be modulated, a Wavelength Selective Switch (WSS) unicast modulation total amount, a modulation point, and a modulation and measurement strategy. The measurement policy may be a step measurement policy, such as the step measurement policies (1) to (3). The channel number of the to-be-measured wave is used for indicating which single wave needs to be measured, and can be indicated by using other types of single wave identifiers.

The optical network node may determine the measurement step length according to one or more of the combined step length measurement policies (1) - (3), for example, when two step length measurement policies are combined, the optical network node needs to satisfy both the two step length measurement policies to determine the measurement step length.

Optionally, in this embodiment of the present application, the optical network node may lock the optical power of the single wave to prevent the downstream traffic from being affected.

The embodiment of fig. 2 will be described in further detail with reference to specific application scenarios.

As shown in fig. 3, the 4 optical network nodes under the jurisdiction of the centralized control unit are denoted NE-A, NE-B, NE-C and NE-D, respectively. Assume that there are two services in the network, old wave 1 and old wave 2. The path of the old wave 1 is NE-A → NE-B → NE-D, and the path of the old wave 2 is NE-B → NE-C. A new upper wave in the network is represented by an additional wave 1, the additional wave 1 can also be called a wave to be measured, and the path of the additional wave 1 is NE-A → NE-B → NE-C. The OMS section between NE-A and NE-B is indicated by OMS section 1, the OMS section between NE-B and NE-D is indicated by OMS section 3, and the OMS section between NE-B and NE-C is indicated by OMS section 2.

Based on the method described in the embodiment of fig. 2, as shown in fig. 4, the flow of the centralized and distributed cooperative optimization debugging method is as follows.

S401, one or more optical network nodes report wave adding information to a centralized control unit, and correspondingly, the centralized control unit receives the wave adding information from one or more optical network nodes.

In combination with the application scenario of fig. 3, the wave-adding information may be reported by any optical network node of NE-A, NE-B or NE-C.

S402, the centralized control unit updates service topology and real-time optical power information based on the wave-adding service path.

In conjunction with the application scenario of FIG. 3, the path of add wave 1 is NE-A → NE-B → NE-C. The centralized control unit acquires the optical power information of NE-A, NE-B and NE-C in real time.

And S403, the centralized control unit calculates the target optical power of the optical layer service.

The optical layer service may be a service to be scheduled or an affected service. For example, in the scenario shown in fig. 3, the service to be scheduled is a wave 1 service, and the affected services are an old wave 1 and an old wave 2.

Taking the add-wave service as an example, a calculation method of the target optical power is described, and a calculation method of the target optical power of the affected service is similar.

And the centralized control unit calculates the service target optical power based on each OMS section on the wave-adding service path, and respectively calculates the target optical power of the main optical path combined wave and the target optical power of the single wave on each OMS section. The target optical power of the main optical path may be calculated based on the principle of optical amplifier gain compensation circuit attenuation. The single-wave optical power of the OMS originating end of the ONSRLOSS equalization can be calculated as the target optical power of the single wave based on the current monitored value.

In combination with the application scenario of fig. 3, the service to be scheduled is add wave 1, and the service add wave 1 passes through OMS section 1 and OMS section 2. The centralized control unit calculates the target optical power of the OMS section 1 and the target optical power of the OMS section 2, respectively. The target optical power comprises a combined target optical power and a single target optical power.

S404, the centralized control unit determines the adjusting and measuring position and the adjusting and measuring total amount.

And the centralized control unit determines the absolute regulating quantity of each OMS section through which the optical layer service passes and determines the relative regulating quantity of the OMS section through which the optical layer service passes based on the absolute regulating quantity. Similarly, optical layer traffic may be pending traffic or may be affected traffic. The service to be scheduled is described as an example.

The absolute regulating quantity of the main light path composite wave and the single wave of each OMS section can be respectively determined. The absolute adjustment quantity of the main light path combined wave of each OMS section can be the difference value of the optical amplifier gain and the combined wave attenuation. The absolute adjustment amount of the single wave of each OMS section may be a difference between a target single-wave optical power and a single-wave actual optical power.

According to the trend of the traffic, the traffic can be divided into traffic upstream (or upstream traffic) and traffic downstream (or downstream traffic), for example, in fig. 3, the traffic upstream added with wave 1 is OMS section 1 of NE-a to NE-B, and the traffic downstream is OMS section 2 of NE-B to NE-C. Considering that the optical power of the downstream of the service is changed after the optical power of the upstream of the service is regulated, the regulating quantity of the downstream node is the regulating quantity of the optical power of each wave of the downstream node minus the regulating quantity accumulated by all the OMSs through the hedging of the upstream regulating quantity and the downstream regulating quantity, and the operation of cutting off is not required to be carried out independently. That is, the relative adjustment total amount of the optical network node is the difference between the absolute adjustment total amount of the optical network node and the accumulated total amount of all the previous adjustment points. In conjunction with the scenario of fig. 3, the relative adjustment total of NE-C is equal to the absolute adjustment total of NE-C (the cumulative total of NE-a and NE-B).

The centralized control unit may also determine an optical power lock value downstream of the traffic, according to which the optical network node may lock the optical power of the single wave. At the end of the service OMS, the single-wave optical power of the downstream service needs to be locked to prevent the upstream modulation optical power from affecting the downstream service. For example, in fig. 3, the traffic to be scheduled passes through NE-A, NE-B and NE-C, the OMS section 3 of the old wave 1 is the traffic downstream, when the NE-a or NE-B adjusts the optical power, the optical power of NE-B may affect the performance of the traffic downstream, i.e., the OMS section 3 of the old wave 1, and by locking the optical power of NE-B, the optical power scheduling of the traffic upstream of the OMS section 1 of the old wave 1 can be prevented from affecting the OMS section 3.

S405, the central control unit determines step length adjusting and measuring strategies of all adjusting and measuring points of the optical layer business.

Similarly, optical layer traffic may be pending traffic or may be affected traffic.

The step length adjustment strategy may refer to any one of the strategies (1) to (3) described above.

The foregoing step size adjustment strategy (2) is exemplified with reference to the scenario shown in fig. 3. The step length adjusting and measuring strategy (2) is as follows: the sum of the debugging step lengths of all services to be debugged associated with the OMS on one optical network node does not exceed a first threshold value. Assuming that the debugging point is NE-A, the service passing through OMS section 1 includes old wave 1 and additional wave 1, and the sum of the debugging step length of the old wave 1 and the additional wave 1 in NE-A does not exceed the first threshold. The sum of the modulation step lengths is the sum of the combined wave and the single wave forward and backward modulation step lengths after cancellation, for example, the sum of the combined wave modulation step length of the NE-a and the sum of the WSS single wave modulation step lengths of two services on the NE-a node.

The foregoing step size adjustment strategy (3) is exemplified with reference to the scenario shown in fig. 3. The step length adjusting and measuring strategy (3) is as follows: the accumulated debugging step length of all optical network nodes passing by the service to be debugged in the same debugging direction does not exceed a second threshold value. The step size tuning strategy (3) is constrained from the service dimension. For example, the traffic to be scheduled plus wave 1 passes through three network elements, namely NE-A, NE-B and NE-C. The regulating step length of the service passing through 3 network elements is respectively 0.6db, -1.2db and 0.6db, then the forward cumulative step length value is (0.6db +0.6db) ═ 1.2db, the reverse cumulative step length value is 1.2db, the same-direction cumulative step length of each site of three optical network nodes passing through the service wave 1 to be regulated does not exceed the threshold, namely the forward cumulative step length of each site of three optical network nodes passing through the service wave 1 to be regulated does not exceed the second threshold, and the reverse cumulative step length of each site of three optical network nodes passing through the service wave 1 to be regulated does not exceed the second threshold.

S406, the centralized control unit sends the debugging information to the optical network node, and correspondingly, the optical network node receives the debugging information from the centralized control unit.

This step may correspond to S201 of the embodiment of fig. 2.

The commissioning information may include any one or more of the following: the step length adjusting and measuring strategy comprises the identification of the optical network node, the total adjusting quantity of the optical amplifier gain, the total adjusting quantity of the optical attenuation, the channel identification of the wave to be adjusted and measured, the identification of the single wave and the total adjusting quantity of the single wave.

In connection with the scenario shown in fig. 3, the centralized control unit may send commissioning information to NE-A, NE-B and NE-C, respectively. For example, the tuning information that the centralized control unit may respectively send to each optical network node may include: 1> optical amplifier gain: the method can comprise the steps of adjusting the total amount of the light amplifier gain, adjusting points and adjusting and measuring strategies; 2> EVOA attenuation: can include light attenuation adjustment total amount, adjustment points and adjustment and measurement strategies; and 3, channel number of the wave to be modulated, WSS single wave modulation total amount, modulation point and modulation strategy. Wherein the adjustment point may be an identification of the optical network node. The tuning strategy may refer to any one or a combination of the above-mentioned items (1) to (3), and may be other strategies. The adjustment point of a single wave in the point 3> may be carried in a Label Switching Path (LSP) attribute, where an LSP is a path that is divided according to special Forward Error Correction (FEC) and is composed of an input node, an output node, and one or more Label Switching Routers (LSRs) and is established at a certain label stack level for packet (packet) transmission. The LSR is a processing device with a multi-protocol label switching (MPLS) node function, and has a capability of forwarding an Internet Protocol (IP) packet of a pure L3 layer. The MPLS input node is used for processing the IP message flow input to the MPLS domain. The MPLS output node is used for processing the IP message flow output by the MPLS domain.

And S407, the optical network node respectively carries out debugging on the combined wave and the single wave of the main optical path according to the debugging information.

This step may correspond to S202a-S203a and/or S202b-S203 b.

The centralized control unit respectively sends the debugging information corresponding to the node to the optical network node, the optical network node determines a first debugging step length according to a step length debugging strategy after receiving the debugging information, and the main optical path combined wave is debugged according to the first debugging step length; and determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

The single wave to be measured can be determined by the measurement information sent by the centralized control unit. When the optical network node modulates the combined wave and the single wave, the optical network node can also modulate and measure by combining other information included in the modulation and measurement information. The optical network node may only modulate and measure the composite wave, may only modulate and measure the single wave, and may modulate and measure both the composite wave and the single wave.

For example, suppose that the optical network node determines that the total adjustment amount of the WSS single wave for the single wave of the channel number 1 is 0.6db according to the adjustment information, and determines to perform adjustment according to the minimum step size of 0.2db according to the step size adjustment strategy. Because the BER can be obtained only after the service is regulated and tested for a certain time, the optical network node regulates and tests according to the minimum step length, and waits for a certain time length to judge whether the monitored service is abnormal or not after the total regulating and testing amount is accumulated. Optionally, the tuning information may also include other information, such as a waiting time period. Alternatively, the optical network node may determine the waiting time by itself. For example, the optical network node determines to wait for 2s, and waits for 2s for debugging after receiving the debugging information.

When the optical network node receives the multiple step length adjusting and measuring strategies, the multiple step length adjusting and measuring strategies can be synthesized to determine the adjusting and measuring step length. For example, according to the step length adjusting strategies (2) and (3), it is determined that the sum of the adjusting and measuring step lengths of all the services to be adjusted and measured associated with the OMS on one optical network node does not exceed a first threshold value, and the accumulated adjusting and measuring step lengths of all the optical network nodes through which the services to be adjusted and measured pass in the same adjusting and measuring direction do not exceed a second threshold value.

Optical layer services from an Optical Transmission Unit (OTU) need to pass through a plurality of optical devices such as an optical amplifier (which may be referred to as an optical amplifier for short), an optical fiber, a Wavelength Selective Switch (WSS), a comb filter unit (ITL), an optical Fiber Interface Unit (FIU), and an EVOA, and light propagates in the form of an analog signal in these optical devices. The hole burning effect of the optical amplifier, the Raman effect of the optical fiber and the filtering effect of the WSS/ITL enable the optical signals of different channels to interact, and finally the interaction is reflected in the change of optical power and possibly the change of OSNR. Fiber splices, fiber degradation, intra-station loss degradation, or manual mishandling, etc., may also result in service performance degradation. The optical layer service needs to perform optimal power regulation and measurement. Based on this, the second optical performance tuning method provided in the embodiments of the present application can be implemented based on the optical communication system shown in fig. 1. The method can adjust the optical power of optical layer service and optimize and measure the optical path in the daily operation and maintenance process of the optical network node. The method may be combined with the embodiment shown in fig. 2, that is, after adding or dropping waves, the central control unit issues a step length adjusting and measuring strategy to the optical network node, and the optical network node adjusts and measures combined waves and/or single waves according to the step length adjusting and measuring strategy, and then performs daily operation and maintenance according to the second optical performance adjusting and measuring method in the daily operation and maintenance process. The method can also be used for independently forming a scheme to be protected in the embodiment of the application and is used for realizing the optimized regulation and measurement of the service power in the daily operation and maintenance process.

First, a model of the next single OMS segment is introduced. As shown in fig. 5, two optical network nodes constitute one OMS segment. The two optical network nodes are assumed to be represented by NE-A and NE-B, wherein NE-A is the head node of the OMS and NE-B is the tail node of the OMS. Optical Performance Monitors (OPMs) are distributed in the first and last nodes of the OMS segment, and can monitor the unicast optical power at the first and last nodes. When the output power of the optical amplifier composite wave deviates from the target value, the optical amplifier gain or the EVOA attenuation value can be adjusted. The output optical power of the optical amplifier single wave deviates from a target value, and the WSS attenuation value needs to be adjusted.

As shown in fig. 6, a specific flow of a second optical performance tuning method provided in the embodiment of the present application is as follows. The operations performed by the optical network node may be performed by any one of the one or more optical network nodes governed by the centralized control unit.

S601, the optical network node collects the output power of the optical signal.

And S602, when the set conditions are met, the optical performance is adjusted and tested by the optical network node.

Wherein the setting condition may include a combination of one or more of the following:

the difference between the output power of the collected optical signal and the target output power exceeds a third threshold;

the degradation value of the insertion loss of the optical network node exceeds a fourth threshold.

Some alternative implementations of the embodiment of fig. 6 are described below.

The optical network node may collect some information of the optical signal in real time, such as optical amplification optical power, optical amplification gain, EVOA attenuation value, or traffic BER. Real-time may be in milliseconds. When the optical performance is adjusted, the collected information may be adjusted, for example, any one or more of the optical power of the optical amplifier, the optical gain of the optical amplifier, the attenuation value of the EVOA, or the service BER may be adjusted.

When the difference between the output power of the collected optical signal and the target output power is judged to exceed the third threshold, the optical signal may be a main optical path composite wave or a single wave. For example, it may be determined that a difference between the acquired composite wave output power and the target output power exceeds a set threshold, or it may be determined that a difference between the acquired single wave output power and the target output power exceeds a set threshold. The threshold of the composite wave and the single wave can be the same or different.

When the degradation value of the insertion loss of the optical network node is judged to exceed the fourth threshold, the insertion loss of the optical network node may be intra-site insertion loss or inter-site insertion loss. For example, it may be determined that the degradation value of the inter-site insertion loss of the optical network node exceeds a set threshold, or it may be determined that the degradation value of the inter-site insertion loss of the optical network node exceeds a set threshold. The threshold of the degradation value of the inter-station insertion loss and the threshold of the degradation value of the inter-station insertion loss may be the same or different.

The inter-station insertion loss is insertion loss between the optical network node and other optical network nodes.

Optionally, the optical network node may set a time threshold, and perform the tuning and the testing when it is determined that the set condition is satisfied N times continuously.

For example, the optical network node may automatically calculate the degradation amount between stations and within stations based on the optical power information transmitted by the device associated protocol, compare the degradation amount with the baseline historical value, and accurately locate the degradation measure point if the difference between the real-time value and the baseline historical value exceeds the threshold if the query is continuously performed for multiple times.

Assuming that the value of the set threshold exceeding the difference value between the output power of the combined wave and the target output power is 2db, the value of the set threshold exceeding the difference value between the output power of the single wave and the target output power is 1db, and the degradation values of the station interpolation loss and the station interpolation loss of the optical network node exceed the set threshold and are 0.5 db. The optical network node can detect the combined wave optical power in a second level, a single optical network node OPM single board can periodically check the single wave optical power in a minute level or a second level, and if the attenuation value between single stations of the combined wave optical power exceeds 2db relative to the baseline historical value, the attenuation value in the single wave optical power exceeds 1db relative to the baseline historical value, the degradation value of the inter-station insertion loss exceeds 0.5db, and the degradation value of the inter-station insertion loss exceeds 0.5db, it can be determined that the related debugging action is required.

With reference to the scenario shown in fig. 3, it is assumed that the single-wave optical power degradation of the service with the added wave 1 at the NE-C receiving end exceeds the threshold, and if the interpolation loss value in the NE-C station also degrades, it indicates that the single-wave optical power degradation is caused by the degradation of the NE-C, and if the interpolation loss value in the NE-C station does not degrade, it may be that the single-wave optical power degradation of the local network element exceeds the threshold due to the degradation of the upstream network element, and then the NE-C may not perform the relevant debugging action.

Each optical network node is independently adjusted and tested according to the embodiment of fig. 6, and the combined wave and the single wave of the main optical path are adjusted and tested respectively, and can be adjusted and tested according to a certain adjustment and test strategy until the adjustment of the adjustment amount caused by degradation is completed.

For example, the main optical path complex may be adjusted according to the adjustment step size of 0.2db and the adjustment total of 0.6 db.

In the process of debugging and testing the optical network node, in order to ensure the debugging and testing security, the embodiment of the present application further provides a third optical performance debugging and testing method, which can be implemented based on the optical communication system shown in fig. 1. The method may be combined with the embodiment described in fig. 2, with the embodiment of fig. 6, or with both the embodiments of fig. 2 and 6. Of course, the method can also separately form a scheme to be protected in the embodiment of the present application, and is used for ensuring the debugging security when the business is optimally debugged in the daily operation and maintenance process.

As shown in fig. 7, a specific process of the third optical performance testing method provided in the embodiment of the present application is as follows.

S701, the optical network node monitors BER information of the OTUU.

The BER information is used to determine the security of the commissioning of optical layer services. The optical layer service may be denoted as a first service.

S702, the optical network node transmits the BER information to an upstream network element of the optical network node based on the transmission path of the optical layer service.

Therefore, the BER information can be carried to the upstream network element related to the optical layer service according to the channel associated protocol, so that the upstream network element can judge the safety of the current regulation and measurement, and further regulation and measurement processing can be carried out.

It is understood that the BER information is used to determine the security of the modulation of the optical layer service, and the embodiments of the present application may replace the BER information with other information used to determine the security of the modulation of the optical layer service. Other information for determining the security OF the scheduling OF the optical layer traffic may be traffic alarm information, such as LOSs OF Signal (LOS), LOSs OF Frame (LOF), or LOSs OF multi-Frame (LOM). The implementation scheme of the other information for determining the security of the optical layer service may refer to a scheme of BER information, and in the embodiment of the present application, the BER information is taken as an example to describe how to transmit the information for determining the security of the optical layer service according to the channel associated protocol.

When the embodiment of fig. 7 is combined with the embodiments of fig. 2 and 6, the centralized control unit issues the step length adjusting and measuring strategy to each optical network node, each optical network node independently and parallelly calculates the absolute degradation amount, a single station independently and parallelly adjusts and measures, adjusts and measures while detecting the service BER in real time, the adjusting and measuring efficiency is greatly improved, and meanwhile, the transverse associated protocol acquires the BER in real time, and the network security is improved. Compared with a centralized scheme, resources need to be synchronized to a centralized control unit, transmission time is needed, and a plurality of operation flows are used for inquiring the BER. And detecting the service BER in the debugging and testing process, wherein the debugging and testing risk exists in the service, and the service is transmitted from the service end node to the service first node along the path.

An alternative implementation of the embodiment of fig. 7 is described in further detail below.

After obtaining the BER information, the optical network node determines an FIU corresponding to the inter-site optical fiber based on the physical port topology and/or the cross information of the optical layer service of the optical network node, determines an OSC single plate connected to the FIU, and transmits the BER information to an upstream network element associated with the optical layer service through an OLS _3 byte of the OSC single plate.

And if the OTU is connected with the optical network node as a cross-network element, the single board connected with the optical network node and the OTU is used as a destination to reversely find the upstream network element.

After receiving the upstream optical network element, the upstream optical network element finds an exit in a similar manner (crossing between FIU and FIU or crossing between FIU and OTU) and forwards the exit until the end station of the OCH service.

With reference to the scenario shown in fig. 8, the network includes network elements such as NE-A, NE-B, NE-C, the NE-C detects BER information of the OTU, and after the NE-C obtains the BER information, the NE-C takes the OTU single board as a host to find the FIU through the OSC path (i.e., intersection of the OTU and the FIU) in the reverse direction, and finds the OSC single board connected to the FIU. The channel associated transmission is performed through the OLS _3 overhead of the OSC.

As shown in fig. 9, in the scenario of optical-electrical separation, communication may be performed in a UDP multicast manner. After an OTU single board of the electric network element collects BER information, the BER information is reported to a host computer of the electric network element for processing, the electric network element finds out opposite-end network element information and far-end board information connected with the OTU through an optical fiber connection relation, and the electric network element transmits the BER information to an opposite-end optical network element through a UDP multicast mode.

Optionally, the optical network node may also be an upstream optical network element, and then the optical network node receives BER information from the downstream network element, where the BER information is used to determine the security of the debugging of the first service.

The optical network node may detect the BER information and may also receive the BER information from downstream network elements.

After the optical network node obtains the BER information, the optical network node determines a second service associated with the first service, and transmits the BER information to an upstream network element of the optical network node based on a transmission path of the first service; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the second service.

The first service may also be referred to as a native service, and the second service may also be referred to as an associated service. The optical output node of the second service and the first service is the optical network node, the optical input node of the first service is a first upstream network element of the optical network node, and the optical input node of the second service is a second upstream network element of the optical network node. The first upstream network element and the second upstream network element are different network elements.

Therefore, the BER information can be transmitted to each optical network node along the path and can be transmitted to the optical network nodes of the associated services of the original services, and the optical network nodes can stop debugging and testing in time when the debugging and testing risk is displayed according to the BER information, so that the debugging and testing safety is ensured.

Next, a transmission path of the BER information will be described with reference to fig. 10.

The network comprises four optical network nodes of NE-A, NE-B, NE-C and NE-D, and three services of wave 1, wave 2 and wave 3 exist. The NE-C detects the BER information of the wave 2 service of the OTU, and the wave 2 is the original service. NE-C carries out channel associated transmission against the direction of wave 2 service and transmits BER information to NE-B. At NE-B there are associated traffic waves 1 and 3, wave 1 and wave 3 being the same egress but different ingress respectively from wave 2. The BER information is transmitted with the channel as indicated by the black bold arrow in fig. 10. NE-B will transmit along the same path against wave 1, wave 2 and wave 3, e.g., NE-B will transmit BER information to NE-A and NE-D, and will suspend the investigation if there is investigation action for NE-A's wave 1 traffic. If the wave 3 service of the NE-D has the debugging action, the debugging is suspended.

It can be understood that, when the native service is transmitted along the channel, the associated service needs to be found, and BER information is transmitted on the transmission paths of the native service and the associated service. In the associated service transmission process, the associated service is not searched any more, and only the BER information needs to be transmitted on the path of the associated service. The OSC overhead can be extended, for example, by adding a byte of OSC, which indicates an attribute of BER information, which may be a native service or an associated service, and may further include information such as a BER value, a source address or a destination address.

In order to implement the functions in the method provided by the embodiments of the present application, the optical network node or the centralized control unit may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

As shown in fig. 11, based on the same technical concept, an embodiment of the present application further provides an apparatus 1100, where the apparatus 1100 may be the optical network node or the centralized control unit, or an apparatus in the optical network node or the centralized control unit, or an apparatus capable of being used in cooperation with the optical network node or the centralized control unit. In one design, the apparatus 1100 may include a module corresponding to one or more of the methods/operations/steps/actions performed by the ONT in the above method embodiments, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module 1101 and a communication module 1102. The communication module 1102 may, in turn, include a receiving module 1102-1 and a transmitting module 1102-2.

When the apparatus 1100 is used to perform the operations of an optical network node:

a receiving module 1102-1, configured to receive debugging information from a centralized control unit, where the debugging information includes a step size debugging policy;

the processing module 1101 is configured to determine a first modulation step size according to the step size modulation strategy, and modulate and measure the main optical path combined wave according to the first modulation step size; and/or determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

The processing module 1101 and the receiving module 1102-1 may also be configured to perform other corresponding steps or operations performed by the optical network node according to the foregoing method embodiment, which are not described herein again.

When the apparatus 1100 is used to perform the operations of a centralized control unit:

the processing module 1101 is configured to determine tuning information, where the tuning information includes a step-size tuning strategy, where the step-size tuning strategy is used by an optical network node to determine a first tuning step size for tuning and measuring a main optical path combined wave, and is used by the optical network node to determine a second tuning step size for tuning and measuring a single wave;

a sending module 1102-2, configured to send the commissioning information to an optical network node.

The processing module 1101 and the sending module 1102-2 may also be configured to perform other corresponding steps or operations performed by the centralized control unit in the foregoing method embodiments, which are not described herein again.

The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Fig. 12 shows an apparatus 1200 provided in this embodiment of the present application, for implementing the functions of the optical network node or the centralized control unit in the foregoing methods. The device may be an optical network node or a centralized control unit, or a device in the optical network node or the centralized control unit, or a device capable of being used in cooperation with the optical network node or the centralized control unit. Wherein, the device can be a chip system. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 1200 includes one or more processors 1220 for implementing the functions of the optical network node or the centralized control unit in the methods provided by the embodiments of the present application. The apparatus 1200 may also include a communication interface 1210. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface for communicating with other devices over a transmission medium. For example, the communication interface 1210 is used for the apparatus in the apparatus 1200 to communicate with other devices. The processor 1220 uses the communication interface 1210 to send and receive data and is used to implement the methods described in the above-described method embodiments.

Exemplarily, when the apparatus 1200 is used for performing the operation of the optical network node:

the communication interface 1210 is configured to receive the measurement information from the centralized control unit, where the measurement information includes a step length measurement policy;

the processor 1220 is configured to determine a first modulation step size according to the step size modulation strategy, and modulate and measure the main optical path combined wave according to the first modulation step size; and/or determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

For details, reference is made to the detailed description in the method example, which is not repeated herein.

Illustratively, when the apparatus 1200 is used to perform the operations of a centralized control unit:

the processor 1220 is configured to determine the tuning and testing information, where the tuning and testing information includes a step tuning and testing policy, where the step tuning and testing policy is used by the optical network node to determine a first tuning and testing step length for tuning and testing the main optical path combined wave, and is used by the optical network node to determine a second tuning and testing step length for tuning and testing the single wave;

a communication interface 1210, configured to send the commissioning information to an optical network node.

The apparatus 1200 may also include at least one memory 1230 for storing program instructions and/or data. Memory 1230 is coupled to processor 1220. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 1220 may cooperate with the memory 1230. Processor 1220 may execute program instructions stored in memory 1230. At least one of the at least one memory may be included in the processor.

The specific connection medium among the communication interface 1210, the processor 1220 and the memory 1230 is not limited in the embodiments of the present application. In fig. 12, the memory 1230, the processor 1220 and the communication interface 1210 are connected by a bus 1240, the bus is represented by a thick line in fig. 12, and the connection manner among other components is only schematically illustrated and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus.

In the embodiments of the present application, the processor may be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In this embodiment, the memory 1230 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example. The memory 1230 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 1230 of the embodiments of the present application may also be circuitry or any other device capable of performing a storage function to store program instructions and/or data.

When the apparatus 1100 and the apparatus 1200 are embodied as a chip or a chip system, the output or the reception of the communication module 1102 and the communication interface 1210 may be baseband signals. When the apparatus 1100 and the apparatus 1200 are embodied as devices, the communication module 1102 and the communication interface 1210 may output or receive radio frequency signals.

The embodiment of the present application provides a computer storage medium, which stores a computer program, where the computer program includes instructions for executing the optical performance tuning method provided in the above embodiment.

Embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the optical performance tuning method provided by the above embodiments.

Embodiments of the present application further provide a chip, where the chip includes a processor and an interface circuit, where the interface circuit is coupled to the processor, the processor is configured to execute a computer program or instructions to implement the optical power detection method, and the interface circuit is configured to communicate with other modules outside the chip. The processor may include a memory or the processor is coupled to a memory, the memory including computer programs or instructions run by the processor.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. An optical performance tuning method applied to an optical communication system including a centralized control unit and one or more optical network nodes, the method comprising:

the centralized control unit determines debugging information, wherein the debugging information comprises a step length debugging strategy, and the step length debugging strategy is used for determining a first debugging step length for debugging the combined wave of a main optical path and/or a second debugging step length for debugging the single wave by the one or more optical network nodes;

the centralized control unit sends the debugging information to the one or more optical network nodes;

the one or more optical network nodes determine a first debugging step length according to the step length debugging strategy, and debug the main optical path combined wave according to the first debugging step length; and/or the presence of a gas in the gas,

and determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

2. The method of claim 1, wherein prior to the centralized control unit determining the commissioning information, the method further comprises:

the centralized control unit receives service optical performance data transmitted by the one or more optical network nodes,

and determining the debugging and testing information according to the service optical performance data sent by the one or more optical network nodes.

3. An optical performance tuning method applied to an optical network node, the method comprising:

receiving debugging information from a centralized control unit, wherein the debugging information comprises a step length debugging strategy;

determining a first debugging step length according to the step length debugging strategy, and debugging the main optical path composite wave according to the first debugging step length; and/or determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

4. A method according to any one of claims 1 to 3, wherein the commissioning information further comprises one or more of: the identification of the optical network node, the total optical amplifier gain adjustment amount, the total optical attenuation adjustment amount, the channel identification of the wave to be measured, the identification of the single wave and the total adjustment amount of the single wave.

5. The method of any one of claims 1 to 4, wherein the step size commissioning strategy comprises one or more of:

the optical network node associated with the optical multiplexing section OMS is debugged according to the set step length;

or, the sum of the testing step lengths of all the services to be tested associated with the OMS on one optical network node does not exceed a first threshold value;

or the accumulated debugging step length of all optical network nodes passing by the service to be debugged in the same debugging direction does not exceed the second threshold value.

6. The method of any one of claims 1 to 5, further comprising: and the optical network node locks the optical power of the single wave.

7. The method of any one of claims 1 to 6, further comprising:

when the set conditions are met, the optical network node conducts debugging and testing on the optical performance; the setting conditions include: the difference between the output power of the collected optical signal and the target output power exceeds a third threshold, and/or the degradation value of the insertion loss of the optical network node exceeds a fourth threshold.

8. The method of claim 7, wherein the optical signal comprises the primary optical path composite and/or the single wave.

9. The method according to claim 7 or 8, wherein the insertion loss of the optical network node comprises an intra-site insertion loss and/or an inter-site insertion loss, and the inter-site insertion loss is an insertion loss between the optical network node and other optical network nodes.

10. The method of any one of claims 1 to 9, further comprising:

monitoring OTU bit error rate BER information of an optical transmission network element, wherein the BER information is used for judging the debugging and testing safety of a first service, and the first service is a service corresponding to the main optical path combined wave or the single wave;

and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the first service.

11. The method according to any one of claims 1 to 9,

receiving BER information from a downstream network element, wherein the BER information is used for judging the debugging and testing safety of the first service;

determining a second service associated with the first service;

transmitting the BER information to an upstream network element of the optical network node based on a transmission path of the first service; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the second service.

12. An optical performance tuning method applied to a centralized control unit is characterized by comprising the following steps:

determining debugging information, wherein the debugging information comprises a step length debugging strategy, and the step length debugging strategy is used for an optical network node to determine a first debugging step length for debugging the combined wave of a main optical path and a second debugging step length for the optical network node to determine the single wave;

and sending the debugging information to the optical network node.

13. The method of claim 12, wherein the commissioning information further comprises one or more of: the identification of the optical network node, the total quantity of optical amplifier gain adjustment, the total quantity of optical attenuation adjustment, the channel identification of the wave to be measured, the identification of the single wave and the total quantity of adjustment of the single wave.

14. An optical communication system, characterized in that the optical communication system comprises a centralized control unit and one or more optical network nodes;

the centralized control unit is used for determining the debugging information, the debugging information comprises a step length debugging strategy, and the step length debugging strategy is used for determining a first debugging step length for debugging the combined wave of the main optical path and/or determining a second debugging step length for debugging the single wave by the one or more optical network nodes;

the centralized control unit is further configured to send the commissioning information to the one or more optical network nodes;

the one or more optical network nodes are used for determining a first debugging step length according to the step length debugging strategy and debugging the main optical path combined wave according to the first debugging step length; and/or determining a second modulation step length according to the step length modulation strategy, and modulating and measuring the single wave according to the second modulation step length.

15. The optical communication system of claim 14, wherein the commissioning information further comprises one or more of: the identification of the optical network node, the total optical amplifier gain adjustment amount, the total optical attenuation adjustment amount, the channel identification of the wave to be measured, the identification of the single wave and the total adjustment amount of the single wave.

16. The optical communication system of claim 14 or 15, wherein the step size measurement strategy comprises one or more of:

or,

the accumulated debugging step length of all optical network nodes passing by the service to be debugged in the same debugging direction does not exceed a second threshold value.

17. An optical performance tuning device applied to an optical network node, comprising:

the receiving module is used for receiving debugging information from the centralized control unit, wherein the debugging information comprises a step length debugging strategy;

the processing module is used for determining a first debugging step length according to the step length debugging strategy and debugging the main optical path combined wave according to the first debugging step length; and/or determining a second regulating and measuring step length according to the step length regulating and measuring strategy, and regulating and measuring the single wave according to the second regulating and measuring step length.

18. The apparatus of claim 17, wherein the commissioning information further comprises one or more of: the identification of the optical network node, the total optical amplifier gain adjustment amount, the total optical attenuation adjustment amount, the channel identification of the wave to be measured, the identification of the single wave and the total adjustment amount of the single wave.

19. The apparatus of claim 17 or 18, wherein the processing module is further to: and locking the optical power of the single wave.

20. The apparatus of any of claims 17-19, wherein the processing module is further configured to:

when the set conditions are met, adjusting and testing the optical performance; the setting conditions include: the difference between the output power of the collected optical signal and the target output power exceeds a third threshold, and/or the degradation value of the insertion loss of the optical network node exceeds a fourth threshold.

21. The apparatus of claim 20, wherein the optical signal comprises the primary optical path composite and/or the single wave.

22. The apparatus according to claim 20 or 21, wherein the insertion loss of the optical network node comprises an intra-site insertion loss and/or an inter-site insertion loss, and the inter-site insertion loss is an insertion loss between the optical network node and another optical network node.

23. The apparatus of any one of claims 17-22, wherein the processing module is further configured to:

24. The apparatus of any one of claims 17 to 22, wherein the receiving module is further configured to receive BER information from a downstream network element, the BER information being used to determine security of the commissioning of the first service;

the processing module is further configured to: determining a second service associated with the first service; transmitting the BER information to an upstream network element of the optical network node based on a transmission path of the first service; and transmitting the BER information to an upstream network element of the optical network node based on the transmission path of the second service.

25. The apparatus of claim 24, wherein the optical output nodes of the second traffic and the first traffic are the optical network nodes, the optical input node of the first traffic is a first upstream network element of the optical network nodes, and the optical input node of the second traffic is a second upstream network element of the optical network nodes.

26. An optical performance adjusting and measuring device is applied to a centralized control unit and is characterized by comprising:

the processing module is used for determining debugging information, wherein the debugging information comprises a step length debugging strategy, and the step length debugging strategy is used for an optical network node to determine a first debugging step length for debugging the main optical path combined wave and a second debugging step length for debugging the single wave;

and the sending module is used for sending the debugging information to the optical network node.

27. The apparatus of claim 26, wherein the commissioning information further comprises one or more of: the identification of the optical network node, the total optical amplifier gain adjustment amount, the total optical attenuation adjustment amount, the channel identification of the wave to be measured, the identification of the single wave and the total adjustment amount of the single wave.

28. The apparatus of claim 26 or 27, wherein the step size commissioning strategy comprises one or more of:

or,

29. A computer-readable storage medium, having stored thereon a computer program or instructions which, when executed in a computer, causes the method of any one of claims 1-13 to be implemented.