Method for realizing automatic optical power control by centralized controller

Abstract

The invention discloses a method for realizing automatic optical power control by a centralized controller. The method comprises the following steps: step 1, acquiring a network topology structure; 2, APC parameters are configured; step 3, service opening information; step 4, calculating configuration parameters; step 5, issuing a control command; according to the method, the optimal output power of each amplifier can be globally, automatically and accurately controlled by monitoring the global service condition of the network and the conditions of equipment and lines, manual participation in network optimization is not needed, high-efficiency and low-cost operation and maintenance are achieved, and the operation efficiency is improved. And the optimal target output power of the amplifier on the line can be automatically calculated by monitoring business, network equipment and line conditions to realize network balance so as to protect the safety of the network and the equipment, and meanwhile, the automatic power control method enables the network to dynamically adjust the power according to actual load and business requirements so as to realize the target of improving the network quality.

Description

Technical Field

[0001] The present invention relates to the field of network communication technologies, and particularly to a method for a centralized controller to achieve automatic optical power control. Background Art

[0002] Currently, automatic power control (APC) refers to a technology that automatically adjusts the power output through a circuit or system. It can keep the output signal power constant or only vary within a small range under the condition of large changes in the input signal power, ensuring that the device operates in the best state. The APC system usually includes a feedback loop that monitors the working state of the device in real time. The comparator compares the monitored actual power with the preset target power, and the adjustment mechanism then adjusts the output power according to the comparison result to make it close to the preset target. In the current communication field, APC can ensure that when receiving a weak signal, the gain of the receiver is high, and when receiving a strong signal, the gain is low, so that the output signal maintains an appropriate power, neither being unable to work properly due to too small an input signal nor causing the receiver to saturate or block due to too large an input signal;

[0003] Currently, in an optical communication network, the transmission power of an optical signal is affected by various factors, including fiber attenuation, temperature change, and laser aging. If the optical power is too high, it will cause the optical receiver to saturate or even be damaged. If the power is too low, it will cause service interruption. Therefore, in order to maintain the stable transmission of optical signals, it is necessary to adjust and control the optical power in real time, and the automatic power control (APC) function comes into being. Summary of the Invention

[0004] The present invention provides a method for a centralized controller to achieve automatic optical power control, which can effectively solve the problems mentioned in the above background art that in an optical communication network, the transmission power of an optical signal is affected by various factors, including fiber attenuation, temperature change, and laser aging. If the optical power is too high, it will cause the optical receiver to saturate or even be damaged. If the power is too low, it will cause service interruption.

[0005] To achieve the above object, the present invention provides the following technical solution: A method for a centralized controller to achieve automatic optical power control, which obtains the network topology structure through the centralized controller, combines the service activation information and relevant information on the actual situation of the service link signal, dynamically calculates the configured parameters in real time through the pre-configured APC parameters, and issues control commands to achieve the function of automatic power control;

[0006] It includes the following steps:

[0007] Step 1, obtain the network topology structure;

[0008] Step 2, configure the APC parameters;

[0009] Step 3, service activation information;

[0010] Step 4, calculate configuration parameters;

[0011] Step 5, issue control commands;

[0012] Step 6, automatic power dynamic adjustment.

[0013] According to the above technical solution, in Step 1, when obtaining the network topology structure, the central controller is used to obtain the topology information of the entire network device, including the configuration information of each network element device, board card and port information, and the connection relationship between ports. The information of the OTS optical transmission section is constructed by obtaining the network topology information;

[0014] The system identifies the optical amplifier sections in the A-Z direction, records the board card models, port rates and connection relationships of each node, and forms a dynamically updated topology database.

[0015] According to the above technical solution, in Step 2, during the APC parameter configuration phase, it is necessary to first enable the APC function of the OTS and plan the maximum number of waves Kmax for the OTS. The maximum output power Bmax of a single wave is automatically calculated through the planned maximum number of waves, that is, the maximum output power of a single wave is calculated by planning the maximum number of waves. The maximum output power of a single wave is calculated by the following formula:

[0016] Bmax = 21 - 10×lgk max ;

[0017] Among them, Kmax is the planned maximum number of waves, and the coefficient 21 comes from the calculation of the typical EDFA noise index and power budget;

[0018] The target output power of a single wave, the target output power in the A-Z direction, and the target output power in the Z-A direction are also configured in this phase, as follows:

[0019] Target output power of a single wave: the actual target output power of a single wave;

[0020] Target output power in the A-Z direction: the target output power of the amplifier at one end of the OTS from left to right;

[0021] Target output power in the Z-A direction: the target output power of the amplifier at one end of the OTS from right to left;

[0022] For the target output powers in the A-Z and Z-A directions, independent power thresholds need to be set respectively for this two-way transmission scenario to avoid reverse signal interference.

[0023] According to the above technical solution, in step two, during APC parameter configuration, adaptive calibration processing is also required. Specifically, the target power value is dynamically corrected through OSNR monitoring or the feedback of a spectrum analyzer to compensate for device aging, and it also supports the switching between manual / auto modes, allowing operation and maintenance personnel to intervene in the adjustment of key parameters.

[0024] According to the above technical solution, in step three, the service activation information is combined with the number of channels, routing information, and actual signal conditions of the services running in the network, and is associated with the OTS to ensure the effective implementation of the APC function.

[0025] According to the above technical solution, step three also includes a service mapping rule and a conflict resolution mechanism:

[0026] The service mapping rule binds the service flow to the OTS segment, giving priority to ensuring the power stability of high-priority services. High-priority services include voice and video.

[0027] When the traffic of a certain channel suddenly surges, the system automatically reduces the power of low-priority channels and maintains the OSNR through switching the DPSK / QPSK modulation method.

[0028] The conflict resolution mechanism is to adopt a weighted round-robin algorithm to allocate available power resources when multiple services share the same OTS and there are power demand conflicts. The weight factor is dynamically adjusted based on the service level agreement SLA.

[0029] According to the above technical solution, in step four, the configuration parameters are calculated based on the obtained network topology information, APC parameters, and service activation information.

[0030] Using the pre-configured automatic power control parameters, the power settings are adjusted through real-time calculation. The specific parameters include the range and threshold of power adjustment, which are dynamically optimized according to the network load and service requirements.

[0031] The calculation formula for the target output power T is:

[0032] T = 10 × lgk;

[0033] Where K is the current number of channels, and these parameters are dynamically optimized according to the network load and service requirements.

[0034] According to the above technical solution, in step four, edge computing is also included when calculating the configuration parameters. Specifically, lightweight algorithms are deployed at distributed nodes, and local power data is pre-processed through edge computing, and the characteristics of anomalies are reported to reduce the transmission load of the centralized controller and the operation load of the system.

[0035] According to the above technical solution, in step five, a control command is issued based on the calculation result. Specifically, the system automatically issues a power adjustment command to the relevant network device based on the calculation result. Each amplifier of the network device receives the power adjustment command, thereby realizing real-time automatic power control.

[0036] When the amplifier receives a command, a transaction mechanism is required to adjust the amplifier gain to ensure synchronous changes in the power of multiple nodes and avoid errors caused by transient power fluctuations. At the same time, a revocation and retry mechanism is supported to prevent the accumulation of invalid instructions.

[0037] According to the above technical solution, in step 6, during the dynamic adjustment of automatic power, the centralized controller monitors the network configuration and equipment operating status in real time, and the system recalculates and adjusts the target output power of the affected OTS, as follows:

[0038] When receiving a linecard missing alarm for a service card, you need to determine whether the card is used in services with the APC function enabled. If so, you need to recalculate and adjust the target output power of the OTS affected by the card.

[0039] If you receive missing, turned off, or LINE RS LOS alarms from an optical module, it indicates that there is an abnormality on the line and you need to check the output power of the optical module.

[0040] If the output power of the optical module is abnormal, you need to further determine whether the optical module is used in services with the APC function enabled. If so, recalculate and adjust the target output power of the OTS affected by the optical module.

[0041] When a single-line optical module fails, it only affects the target output power of the single-side line. Through the dynamic adjustment mechanism, the network can adjust the power in real time according to the actual load and business needs, improving network quality and stability.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. By monitoring the global network service situation and the status of equipment and lines, the optimal output power of each amplifier can be automatically and accurately controlled globally, eliminating the need for human participation in network optimization and achieving high-efficiency and low-cost operation and maintenance. In addition, the optimal target output power of the amplifier on the line can be automatically calculated by monitoring the service, network equipment and line conditions to achieve network balancing, thereby protecting the security of the network and equipment. At the same time, this automatic power control method enables the network to dynamically adjust power according to actual load and service needs, achieving the goal of improving network quality.

[0044] 2. By integrating multi-dimensional decision-making based on network topology, business characteristics, and environmental data, the method is made more intelligent. Through a centralized controller, the limitations of traditional single-domain control are broken, cross-domain power collaborative optimization is achieved, the risk of cumulative loss across segments is reduced, and a shift from passive response to active defense is achieved. Fault warnings are highly accurate, human intervention is reduced, and alarm response time is short. An interactive interface is provided to support operation and maintenance personnel in dynamically adjusting thresholds and simulating fault scenarios, thereby improving operation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0046] In the attached figure:

[0047] Figure 1 is a flow chart of the automatic optical power control APC of the present invention;

[0048] Figure 2 It is a schematic diagram of the OTS service of the present invention;

[0049] Figure 3 Schematic diagram of the AZ target output power circuit of the present invention;

[0050] Figure 4 is a schematic diagram of the ZA target output power circuit of the present invention;

[0051] Figure 5 It is a schematic diagram of the interface of the APC parameters of the present invention;

[0052] Figure 6 It is a schematic diagram of the APC function icon on the OTS service of the present invention;

[0053] Figure 7 It is a schematic diagram of detailed parameters of the amplifier of the present invention;

[0054] Figure 8 It is a schematic diagram of the abnormal adjustment of the bidirectional line APC by the service card of the present invention;

[0055] Fig. 9 This is a schematic diagram of the present invention in which only the APC of the upper line is adjusted when the line in the AZ direction of the service is abnormal;

[0056] Fig.10 It is a schematic diagram of the present invention in which only the APC of the lower line is adjusted when the line in the ZA direction of the service is abnormal. DETAILED DESCRIPTION

[0057] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0058] Example: As Figure 1 shown, the present invention provides a technical solution, a method for a centralized controller to achieve automatic optical power control. By the centralized controller, the topology of the network is obtained, and combined with the service activation information and relevant information on the actual situation of the service link signal, through the pre-configured APC parameters, the configured parameters are dynamically calculated in real time, and a control command is issued to achieve the function of automatic power control;

[0059] It includes the following steps:

[0060] Step 1, obtain the network topology;

[0061] Step 2, configure the APC parameters;

[0062] Step 3, service activation information;

[0063] Step 4, calculate the configured parameters;

[0064] Step 5, issue a control command;

[0065] Step 6, automatic power dynamic adjustment.

[0066] Based on the above technical solution, in Step 1, when obtaining the network topology, the topology information of the entire network device is obtained through the centralized controller, including the configuration information of each network element device, the board and port information, and the connection relationship between the ports. By obtaining the network topology information, the information of the OTS optical transmission section is constructed;

[0067] The system identifies the OTS of the optical amplifier section in the A-Z direction, records the board model, port rate and connection relationship of each node. The board model includes OLA / REG, and the port rate has 100G / 200G, forming a dynamically updated topology database, as Figure 2 shown.

[0068] As Figure 3-5 shown, based on the above technical solution, in Step 2, in the APC parameter configuration stage, it is necessary to first enable the APC function of the OTS, and plan the maximum number of waves of the OTS planning as Kmax. The maximum output power Bmax of a single wave is automatically calculated through the planned maximum number of waves, that is, the maximum output power of a single wave is calculated through the planned maximum number of waves. The maximum output power of a single wave is calculated by the following formula:

[0069] Bmax = 21 - 10×lgk max ;

[0070] where Kmax is the planned maximum number of waves, and the coefficient 21 comes from the typical EDFA noise index and power budget calculation;

[0071] The single-wave target output power, AZ target output power, and ZA target output power are also configured at this stage, as follows:

[0072] Single-wave target output power: actual single-wave target output power;

[0073] AZ target output power: the target output power of the amplifier from left to right end of the OTS;

[0074] ZA target output power: the target output power of the amplifier from the right to the left end of the OTS;

[0075] For the target output power in both directions AZ and ZA, independent power thresholds need to be set for each bidirectional transmission scenario to avoid reverse signal interference.

[0076] Based on the above technical solution, in step two, adaptive calibration is also required during APC parameter configuration. Specifically, the target power value is dynamically corrected through OSNR monitoring or optical spectrum analyzer (OSA) feedback to compensate for device aging. It also supports manual / automatic mode switching, allowing operation and maintenance personnel to intervene in the adjustment of key parameters.

[0077] like Figure 6 As shown, based on the above technical solution, in step three, the service activation information is combined with the channel number K, routing information and actual signal conditions of the services running in the network, and associated with the OTS to ensure the effective implementation of the APC function.

[0078] Based on the above technical solution, step three also includes business mapping rules and conflict resolution mechanisms:

[0079] The service mapping rule is to bind service flows to OTS segments. Service flows include SDH / OTN channels, and prioritize power stability for high-priority services, such as voice and video.

[0080] When a channel experiences a sudden surge in traffic, the system automatically reduces the power of low-priority channels and maintains OSNR by switching between DPSK and QPSK modulation.

[0081] The conflict resolution mechanism uses a weighted round-robin algorithm to allocate available power resources when multiple services share the same OTS and have conflicting power requirements. The weight factor is dynamically adjusted based on the service level agreement (SLA).

[0082] Based on the above technical solution, in step 4, the configuration parameters are calculated using the obtained network topology information, APC parameters, and service activation information;

[0083] Use pre-configured Automatic Power Control (APC) parameters to adjust power settings through real-time calculations. Specific parameters include power adjustment range and thresholds, enabling dynamic optimization based on network load and service needs.

[0084] The calculation formula for the target output power T is:

[0085] T = 10 × lgk;

[0086] Here, K is the current number of channels. These parameters are dynamically optimized based on network load and service requirements.

[0087] Based on the above technical solution, step four also includes edge computing when calculating configuration parameters. Specifically, lightweight algorithms are deployed on distributed nodes, local power data is preprocessed through edge computing, and abnormal characteristics are reported. Abnormal characteristics include sudden LOS alarms, reducing the transmission load of the centralized controller and the operating load of the system.

[0088] like Figure 7 As shown, based on the above technical solution, in step five, a control command is issued according to the calculation result. Specifically, the system automatically issues a power adjustment command to the relevant network device based on the calculation result. Each amplifier of the network device receives the power adjustment command, thereby realizing real-time automatic power control.

[0089] When the amplifier receives a command, a transaction mechanism is required to adjust the amplifier gain to ensure synchronous changes in the power of multiple nodes and avoid errors caused by transient power fluctuations. At the same time, a revocation and retry mechanism is supported to prevent the accumulation of invalid instructions.

[0090] like Figure 8-10 As shown, based on the above technical solution, in step 6, during the dynamic adjustment of automatic power, the centralized controller monitors the network configuration and equipment operating status in real time, and the system recalculates and adjusts the target output power of the affected OTS, as follows:

[0091] When receiving a linecard missing alarm for a service card, you need to determine whether the card is used in services with the APC function enabled. If so, you need to recalculate and adjust the target output power of the OTS affected by the card.

[0092] If you receive missing, turned off, or LINE RS LOS alarms from an optical module, it indicates that there is an abnormality on the line and you need to check the output power of the optical module.

[0093] If the output power of the optical module is abnormal, you need to further determine whether the optical module is used in services with the APC function enabled. If so, recalculate and adjust the target output power of the OTS affected by the optical module.

[0094] When a single-line optical module fails, it only affects the target output power of the single-side line. Through the dynamic adjustment mechanism, the network can adjust the power in real time according to the actual load and business needs, improving network quality and stability.

[0095] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for a centralized controller to implement automatic optical power control, characterized in that: Obtain the network topology through a centralized controller, combine the service activation information and relevant information on the actual situation of service link signals, and dynamically and real-time calculate the configured parameters through pre-configured APC parameters, and issue control commands to implement the function of automatic power control; It includes the following steps: Step 1, obtain the network topology; Step 2, configure APC parameters; Step 3, service activation information; Step 4, calculate the configured parameters; Step 5, issue control commands; Step 6, automatically adjust the power dynamically.

2. The method for a centralized controller to achieve automatic optical power control according to claim 1, characterized in that: In Step 1, when obtaining the network topology, the topology information of the entire network device is obtained through a centralized controller, including the configuration information of each network element device, the board card and port information, and the connection relationship between ports. The information of the OTS optical transmission section is constructed by obtaining the network topology information; The system identifies the optical amplifier sections in the A-Z direction, records the board card models, port rates and connection relationships of each node, and forms a dynamically updated topology database.

3. The method for a centralized controller to implement automatic optical power control according to claim 1, characterized in that: In Step 2, during the APC parameter configuration stage, it is necessary to first enable the APC function of the OTS, and plan the maximum number of waves of the OTS plan as Kmax. The maximum output power Bmax of a single wave is automatically calculated through the planned maximum number of waves, that is, the maximum output power of a single wave is calculated through the planned maximum number of waves. The maximum output power of a single wave is calculated by the following formula: Bmax = 21 - 10×lgk max ; Where Kmax is the planned maximum number of waves, and the coefficient 21 comes from the calculation of the typical EDFA noise index and power budget; The target output power of a single wave, the target output power in the A-Z direction, and the target output power in the Z-A direction are also configured in this stage, specifically as follows: Target output power of a single wave: the actual target output power of a single wave; Target output power in the A-Z direction: the target output power of the amplifier at one end of the OTS from left to right; Target output power in the Z-A direction: the target output power of the amplifier at one end of the OTS from right to left; For the target output power in the A-Z and Z-A directions, independent power thresholds need to be set respectively for this two-way transmission scenario to avoid reverse signal interference.

4. A method for a centralized controller to achieve automatic optical power control according to claim 3, characterized in that: In Step 2, during the APC parameter configuration, adaptive calibration processing is also required. Specifically, the target power value is dynamically corrected through OSNR monitoring or a spectrum analyzer feedback to compensate for device aging, and it also supports the switching between manual / auto modes, allowing operation and maintenance personnel to intervene in the adjustment of key parameters.

5. A method for a centralized controller to implement automatic optical power control according to claim 1, characterized in that: The service activation information in Step 3 is combined with the number of channels, routing information and actual signal situation of the services running in the network, and is associated with the OTS to ensure the effective implementation of the APC function.

6. The method for a centralized controller to achieve automatic optical power control according to claim 5, characterized in that: Step 3 also includes a service mapping rule and a conflict resolution mechanism: The service mapping rule is to bind the service flow to the OTS section, and give priority to ensuring the power stability of high-priority services. High-priority services include voice and video; When the traffic of a certain channel surges suddenly, the system automatically reduces the power of low-priority channels and maintains the OSNR by switching the DPSK / QPSK modulation method; The conflict resolution mechanism is to adopt a weighted round-robin algorithm to allocate available power resources when multiple services share the same OTS and there are power demand conflicts, and the weight factor is dynamically adjusted based on the service level agreement SLA.

7. A method for a centralized controller to implement automatic optical power control according to claim 1, characterized in that: In step four, configuration parameters are calculated based on the obtained network topology information, APC parameters, and service activation information; Using pre-configured automatic power control parameters, the power setting is adjusted through real-time calculation. The specific parameters include the range and threshold of power adjustment, which are dynamically optimized according to network load and service requirements; The calculation formula for the target output power T is: T = 10 × lgk; where K is the current number of channels, and these parameters are dynamically optimized according to network load and service requirements.

8. A method for a centralized controller to achieve automatic optical power control according to claim 7, characterized in that: In step four, edge computing is also included when calculating configuration parameters. Specifically, lightweight algorithms are deployed at distributed nodes to preprocess local power data through edge computing and report abnormal features, reducing the transmission load of the centralized controller and the operation load of the system.

9. A method for a centralized controller to achieve automatic optical power control according to claim 1, characterized in that: In step five, control commands are issued according to the calculation results. Specifically, the system automatically issues power adjustment commands to relevant network devices based on the calculation results. Each amplifier of the network device receives the power adjustment command to achieve real-time automatic power control; When the amplifier receives the command, a transaction mechanism is required for amplifier gain adjustment to ensure synchronous changes in multi-node power, avoid bit errors caused by transient power fluctuations, and at the same time support the revocation and retry mechanisms to prevent the accumulation of invalid instructions.

10. A method for a centralized controller to implement automatic optical power control according to claim 1, characterized in that: In step six, during the dynamic adjustment of automatic power, the centralized controller is used to monitor the network configuration and device operating status in real time, and the system will recalculate and adjust the target output power of the affected OTSs as follows: When receiving the linecard missing alarm of the service board, it is necessary to determine the application of the board in the service with the APC function enabled. If so, it is necessary to recalculate and adjust the target output power of the OTSs affected by the board; When receiving the missing, turned off, or LINE RS LOS alarm of the optical module, it indicates that there is an abnormality in the line, and it is necessary to detect the output power of the optical module; If the output power of the optical module is abnormal, it is necessary to further determine the application of the optical module in the service with the APC function enabled. If so, recalculate and adjust the target output power of the OTSs affected by the optical module; When an abnormality occurs in the single-line optical module, it only affects the target output power of the unilateral line. Through the dynamic adjustment mechanism, the network can adjust the power in real time according to the actual load and service requirements, improving the network quality and stability.

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