A 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier

Abstract

The present invention relates to the field of line monitoring technology, and specifically discloses a 400G all-optical network long-distance transmission line monitoring system based on an RFA Raman amplifier. In order to monitor the long-distance transmission line, the present invention arranges remote optical fiber amplifiers and sensors at key nodes of the transmission line to collect performance parameters and environmental parameters of optical signals of each node. The optical fiber amplifier self-check module is used to self-check the optical fiber amplifier every period to avoid the influence of optical fiber amplifier failure on line monitoring. Then, the real-time parameters of the optical signal of each node are analyzed by the analysis module to determine whether there is a possibility of failure in the current state of all nodes. Then, combined with the environmental parameters and the historical parameters of the optical signal of each node, it is predicted whether there will be potential failures at each node, thereby improving the comprehensiveness of monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of line monitoring, and specifically discloses a 400G all-optical network long-distance transmission line monitoring system based on an RFA Raman amplifier. Background Art

[0002] With the rapid development of information technology, optical communication networks have become the main carrier of information transmission. Especially driven by applications such as big data and cloud computing, higher requirements are placed on the bandwidth and reliability of optical transmission networks. As the representative of the next generation of high-speed optical transmission technology, the 400G all-optical network has the characteristics of large transmission capacity and long transmission distance. However, during long-distance transmission, fiber loss, nonlinear effects, and environmental factors will lead to a decrease in signal quality and even cause transmission failures. Therefore, long-distance transmission lines need to be monitored in real time. Raman Fiber Amplifier (RFA) is a device that uses the nonlinear optical effect in optical fibers, stimulated Raman scattering, to amplify optical signals, which can achieve efficient and real-time monitoring of transmission lines.

[0003] Most of the existing monitoring systems only compare a certain parameter with the standard value during the line transmission process. If the parameter does not meet the standard, it is judged that there is a fault in the transmission line. Although the above method can detect faults in time, it cannot detect and warn of potential transmission faults in time in combination with the environmental status of the line, providing sufficient time for operation and maintenance personnel to handle them, reducing the impact of faults on the optical transmission network, especially for long-distance transmission. The environment in which the line is located may be different, and it is even more necessary to detect and warn of potential transmission faults in time in combination with the environmental status. Summary of the invention

[0004] The purpose of the present invention is to provide a 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier to solve the problems faced in the above-mentioned background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier, the system includes a working performance monitoring module, an optical fiber amplifier self-test module, an environmental monitoring module, a line evaluation module and an early warning module;

[0007] The working performance monitoring module is used to arrange a remote optical fiber amplifier at a key node of the transmission line, amplify the optical signal by using the gain characteristics of the RFA, and collect the performance parameters of the optical signal in real time in combination with the built-in monitoring unit;

[0008] The optical fiber amplifier self-test module is used to regularly collect status parameters of the optical fiber amplifier to ensure the normal operation of the monitoring system;

[0009] The environmental monitoring module is used to arrange sensors at key nodes of the transmission line to collect environmental parameters along the transmission line;

[0010] The line evaluation module is used to evaluate the state of the transmission line according to the performance parameters and environmental parameters of the optical signal;

[0011] The early warning module is used to issue a corresponding early warning according to the self-test result of the line optical fiber amplifier self-test module and the evaluation result of the line evaluation module.

[0012] As a further description of the solution of the present invention, the working process of the optical fiber amplifier self-test module includes:

[0013] All optical fiber amplifiers are numbered 1, 2, ..., n, where i belongs to n, and the internal temperature variation data of the i-th optical fiber amplifier is obtained over time;

[0014] According to the internal temperature variation data of the i-th optical fiber amplifier, the internal temperature variation function T of the i-th optical fiber amplifier is fitted. i (t);

[0015] The consistency coefficient Y of the i-th fiber amplifier is calculated by the following formula: i :

[0016]

[0017] Where t1 is the initial time of self-test, t2 is the current time, and k is the preset coefficient;

[0018] The obtained consistency coefficient Y of the i-th fiber amplifier i Compare with the threshold values ​​Y1 and Y2 preset by the system;

[0019] If Y i If it does not belong to the interval [Y1, Y2], it means that the i-th optical fiber amplifier may fail, and a corresponding warning is issued through the early warning module;

[0020] Calculate the consistency coefficient Y of n fiber amplifiers in turn n And compare with the preset thresholds Y1 and Y2 of the system to perform self-check on the status of all optical fiber amplifiers.

[0021] As a further description of the solution of the present invention, the working process of the line evaluation module includes:

[0022] Obtaining various performance parameter values ​​of the optical signal of the i-th node;

[0023] The values ​​of various performance parameters are compared with the corresponding standards respectively: if there are performance parameter values ​​that do not meet the standards, it is judged that there is a fault at the i-th node of the line; otherwise, the status of the i-th node of the line is judged based on the overall deviation of the values ​​of various performance parameters at the i-th node.

[0024] As a further description of the solution of the present invention, the process of judging the state of the i-th node of the line according to the overall deviation of the performance parameter values ​​of the i-th node includes:

[0025] Get the real-time data f of the jth optical signal of the i-th node of the line ij ;

[0026] The node state coefficient A at the i-th position is calculated by the following formula i :

[0027]

[0028] Where M is the number of performance parameters of the collected optical signal, j∈[1,M], f ij0 is the standard value of the performance parameter of the jth optical signal, f th is the reference value of the performance parameter of the jth optical signal; k j is the correlation coefficient of the performance parameter of the j-th optical signal;

[0029] The state coefficient of the node at the i-th position of the line is compared with the preset threshold A th To compare:

[0030] If A i ≥A th , then it is judged that the possibility of a fault at the i-th node of the line is high;

[0031] Otherwise, it is judged that the probability of a fault at the i-th node of the line is low;

[0032] Calculate the state coefficient A of n line nodes in turn n And with the system preset threshold A th Compare and evaluate the status of all line nodes.

[0033] As a further description of the solution of the present invention, the working process of the line evaluation module also includes:

[0034] Obtaining the performance parameter variation data of the jth optical signal of the i-th node of the line within a set time period;

[0035] According to the performance parameter variation data of the j-th optical signal of the i-th node over time, the performance parameter variation function f of the j-th optical signal of the i-th node over time is fitted. ij (t);

[0036] Obtaining the time-varying data of the kth environmental parameter affecting the jth optical signal at the i-th node;

[0037] The kth environmental parameter affecting the jth optical signal at the ith node varies with time. The kth environmental parameter affecting the jth optical signal at the ith node varies with time. jk (t);

[0038] The state prediction coefficient B of the i-th node is calculated by the following formula i :

[0039]

[0040] In the formula, x is the number of environmental parameters affecting the jth optical signal at the i-th node, k belongs to x, ω j is the correlation number corresponding to the jth optical signal of the preset i-th node, is the correlation coefficient of the kth environmental parameter affecting the jth optical signal at the preset i-th node, and t3-t4 is the set time period;

[0041] According to the state prediction coefficient B of the i-th node i Predict the future state of the i-th node of the line.

[0042] As a further description of the solution of the present invention, the state prediction coefficient B of the node at the i-th position i The process of predicting the future state of the i-th node of the line includes:

[0043] The state prediction coefficient B of the node at the i-th position of the line i With the preset threshold B th To compare:

[0044] If B i ≥B th , then it is judged that the possibility of potential faults in the future at the node i of the line is high;

[0045] Otherwise, it is judged that the probability of a potential fault in the future at the i-th node of the line is low;

[0046] Calculate the state prediction coefficient B of n line nodes in turn n And compared with the system preset threshold B th Compare and evaluate the future status of all line nodes.

[0047] As a further description of the solution of the present invention, the system also includes a display system, and the display system is used to display a real-life map of the transmission line, and the real-life map marks the locations of all monitoring nodes.

[0048] As a further description of the solution of the present invention, when the early warning system issues an early warning, the corresponding node position will be displayed in the real-life map, so that the management personnel can quickly find the fault point.

[0049] Beneficial effects of the present invention:

[0050] The present invention monitors long-distance transmission lines. Remote optical fiber amplifiers and sensors are arranged at key nodes of the transmission lines to collect performance parameters and environmental parameters of optical signals at each node. The optical fiber amplifier self-check module performs self-check on the optical fiber amplifier at regular intervals to prevent the failure of the optical fiber amplifier from affecting the monitoring of the line. The real-time parameters of the optical signal at each node are analyzed by the analysis module to determine whether there is a possibility of failure in the current state of all nodes. Then, based on the environmental parameters and the historical parameters of the optical signal at each node, it is predicted whether there will be potential failures at each node, thereby improving the comprehensiveness of monitoring.

[0051] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0053] Figure 1 It is a partial structural schematic diagram of a 400G all-optical network long-distance transmission line monitoring system based on an RFA Raman amplifier of the present invention. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] See also Figure 1As shown, a 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier, the system includes a working performance monitoring module, a fiber amplifier self-test module, an environment monitoring module, a line evaluation module and an early warning module;

[0056] The working performance monitoring module is used to arrange a remote optical fiber amplifier at a key node of the transmission line, amplify the optical signal by using the gain characteristics of the RFA, and collect the performance parameters of the optical signal in real time in combination with the built-in monitoring unit;

[0057] The optical fiber amplifier self-test module is used to regularly collect status parameters of the optical fiber amplifier to ensure the normal operation of the monitoring system;

[0058] The environmental monitoring module is used to arrange sensors at key nodes of the transmission line to collect environmental parameters along the transmission line;

[0059] The line evaluation module is used to evaluate the state of the transmission line according to the performance parameters and environmental parameters of the optical signal;

[0060] The early warning module is used to issue a corresponding early warning according to the self-test result of the line optical fiber amplifier self-test module and the evaluation result of the line evaluation module.

[0061] Through the above technical scheme, the present invention monitors long-distance transmission lines, arranges remote optical fiber amplifiers and sensors at key nodes of the transmission lines, and is used to collect performance parameters and environmental parameters of optical signals of each node, wherein the performance parameters of the optical signal include optical power, signal-to-noise ratio, bit error rate and dispersion, and the environmental parameters include temperature and humidity, etc. The optical fiber amplifier is self-checked through the optical fiber amplifier self-check module at regular intervals to avoid the influence of optical fiber amplifier failure on line monitoring, and then the real-time parameters of the optical signal of each node are analyzed through the analysis module to determine whether there is a possibility of failure in the current state of all nodes, and then, combined with the environmental parameters and the historical parameters of the optical signal of each node, whether each node will have a potential failure is predicted to improve the comprehensiveness of monitoring.

[0062] The working process of the optical fiber amplifier self-test module includes:

[0063] All optical fiber amplifiers are numbered 1, 2, ..., n, where i belongs to n, and the internal temperature variation data of the i-th optical fiber amplifier is obtained over time;

[0064] According to the internal temperature variation data of the i-th optical fiber amplifier, the internal temperature variation function T of the i-th optical fiber amplifier is fitted. i (t);

[0065] The consistency coefficient Y of the i-th fiber amplifier is calculated by the following formula:i :

[0066]

[0067] Where t1 is the initial time of self-test, t2 is the current time, and k is the preset coefficient;

[0068] The obtained consistency coefficient Y of the i-th fiber amplifier i Compare with the threshold values ​​Y1 and Y2 preset by the system;

[0069] If Y i If it does not belong to the interval [Y1, Y2], it means that the i-th optical fiber amplifier may fail, and a corresponding warning is issued through the early warning module;

[0070] Calculate the consistency coefficient Y of n fiber amplifiers in turn n And compare with the preset thresholds Y1 and Y2 of the system to perform self-check on the status of all optical fiber amplifiers.

[0071] Through the above technical solution, this embodiment numbers all optical fiber amplifiers to facilitate timely detection of fault points. First, the internal temperature variation function T of the i-th optical fiber amplifier is obtained. i (t) and substitute it into the formula to calculate the consistency coefficient Y of the i-th fiber amplifier i , where is the difference between the historical cumulative state of the temperature parameters of the ith fiber amplifier and the historical cumulative state of the average temperature parameters of all fiber amplifiers, is the difference between the current state of the temperature parameter of the ith fiber amplifier and the current state of the average temperature parameter of all fiber amplifiers. The consistency coefficient Y of the ith fiber amplifier is obtained. i Compare with the system preset thresholds Y1 and Y2; if Y i If it does not belong to the interval [Y1, Y2], it means that the i-th optical fiber amplifier may fail, and a corresponding warning is issued through the early warning module.

[0072] The working process of the line evaluation module includes:

[0073] Obtaining various performance parameter values ​​of the optical signal of the i-th node;

[0074] The values ​​of various performance parameters are compared with the corresponding standards respectively: if there are performance parameter values ​​that do not meet the standards, it is judged that there is a fault at the i-th node of the line; otherwise, the status of the i-th node of the line is judged based on the overall deviation of the values ​​of various performance parameters at the i-th node.

[0075] The process of judging the state of the i-th node of the line according to the overall deviation of the performance parameter values ​​of the i-th node includes:

[0076] Get the real-time data f of the jth optical signal of the i-th node of the line ij ;

[0077] The node state coefficient A at the i-th position is calculated by the following formula i :

[0078]

[0079] Where M is the number of performance parameters of the collected optical signal, j∈[1,M], f ij0 is the standard value of the performance parameter of the jth optical signal, f th is the reference value of the performance parameter of the jth optical signal; k j is the correlation coefficient of the performance parameter of the j-th optical signal;

[0080] The state coefficient of the node at the i-th position of the line is compared with the preset threshold A th To compare:

[0081] If A i ≥A th , then it is judged that the possibility of a fault at the i-th node of the line is high;

[0082] Otherwise, it is judged that the probability of a fault at the i-th node of the line is low;

[0083] Calculate the state coefficient A of n line nodes in turn n And with the system preset threshold A th Compare and evaluate the status of all line nodes.

[0084] Through the above technical solution, this embodiment compares each performance parameter value with the corresponding standard respectively: if there is a performance parameter value that does not meet the standard, it is determined that there is a fault at the i-th node of the line; otherwise, the real-time data f of the j-th optical signal of the i-th node of the line is obtained. ij Substitute the formula to calculate the node state coefficient A at the i-th location i , respectively calculate the real-time data and standard value of performance parameters of each optical signal, and then add them up to further judge the state of the node at the i-th position, and compare the state coefficient of the node at the i-th position of the line with the preset threshold value A th Compare: If A i ≥A th , then it is highly likely that a fault exists at the i-th node of the line; otherwise, it is less likely that a fault exists at the i-th node of the line.

[0085] The working process of the line evaluation module also includes:

[0086] Obtaining the performance parameter variation data of the jth optical signal of the i-th node of the line within a set time period;

[0087] According to the performance parameter variation data of the j-th optical signal of the i-th node over time, the performance parameter variation function f of the j-th optical signal of the i-th node over time is fitted. ij (t);

[0088] Obtaining the time-varying data of the kth environmental parameter affecting the jth optical signal at the i-th node;

[0089] The kth environmental parameter affecting the jth optical signal at the ith node varies with time. The kth environmental parameter affecting the jth optical signal at the ith node varies with time. jk (t);

[0090] The state prediction coefficient B of the i-th node is calculated by the following formula i :

[0091]

[0092] In the formula, x is the number of environmental parameters affecting the jth optical signal at the i-th node, k belongs to x, ω j is the correlation number corresponding to the jth optical signal of the preset i-th node, is the correlation coefficient of the kth environmental parameter affecting the jth optical signal at the preset i-th node, and t3-t4 is the set time period;

[0093] According to the state prediction coefficient B of the i-th node i Predict the future state of the i-th node of the line.

[0094] According to the state prediction coefficient B of the i-th node i The process of predicting the future state of the i-th node of the line includes:

[0095] The state prediction coefficient B of the node at the i-th position of the line i With the preset threshold B th To compare:

[0096] If B i ≥B th , then it is judged that the possibility of potential faults in the future at the node i of the line is high;

[0097] Otherwise, it is judged that the probability of a potential fault in the future at the i-th node of the line is low;

[0098] Calculate the state prediction coefficient B of n line nodes in turnn And compared with the system preset threshold B th Compare and evaluate the future status of all line nodes.

[0099] Through the above technical solution, this embodiment takes into account that the environment of each node of the line is inconsistent during long-distance transmission, and each environmental parameter has an inconsistent effect on each node. Therefore, according to the time variation function f of the performance parameter of the jth optical signal of the i-th node ij (t), the time-varying function g of the kth environmental parameter affecting the jth optical signal at the i-th node jk (t) and the number of environmental parameters affecting the jth optical signal at the ith node, respectively consider the impact of each environmental parameter on the performance parameters of each optical signal, predict the possibility of potential failure of the ith node of the broken line in the future, and calculate the state prediction coefficient B of the ith node of the line i With the preset threshold B th Compare: If B i ≥B th , then it is judged that the possibility of a potential fault at the i-th node of the line in the future is high; otherwise, it is judged that the possibility of a potential fault at the i-th node of the line in the future is low.

[0100] The system also includes a display system, which displays a real-life map of the transmission line, and the real-life map marks the locations of all monitoring nodes.

[0101] When the early warning system issues an early warning, it will be displayed at the corresponding node position in the real-life map, allowing management personnel to quickly find the fault point.

[0102] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier, characterized in that: The system includes a working performance monitoring module, a fiber amplifier self-test module, an environment monitoring module, a line evaluation module and an early warning module; The working performance monitoring module is used to arrange remote fiber amplifiers at key nodes of the transmission line, amplify the optical signal by using the gain characteristics of the RFA, and collect the performance parameters of the optical signal in real time in combination with the built-in monitoring unit; The optical fiber amplifier self-test module is used to regularly collect status parameters of the optical fiber amplifier to ensure the normal operation of the monitoring system; The environmental monitoring module is used to arrange sensors at key nodes of the transmission line to collect environmental parameters along the transmission line; The line evaluation module is used to evaluate the state of the transmission line according to the performance parameters and environmental parameters of the optical signal; The early warning module is used to issue a corresponding early warning according to the self-test result of the optical fiber amplifier self-test module and the evaluation result of the line evaluation module; The working process of the optical fiber amplifier self-test module includes: All optical fiber amplifiers are numbered 1, 2, ..., n, where i belongs to n, and the internal temperature variation data of the i-th optical fiber amplifier is obtained over time; According to the internal temperature variation data of the i-th optical fiber amplifier, the internal temperature variation function T of the i-th optical fiber amplifier is fitted. i (t); The consistency coefficient Y of the i-th fiber amplifier is calculated by the following formula: i : Where t1 is the initial time of self-test, t2 is the current time, and k is the preset coefficient; The obtained consistency coefficient Y of the i-th fiber amplifier i Compare with the threshold values ​​Y1 and Y2 preset by the system; If Y i If it does not belong to the interval [Y1, Y2], it means that the i-th optical fiber amplifier may fail, and a corresponding warning is issued through the early warning module; Calculate the consistency coefficient Y of n fiber amplifiers in turn n And compare with the system preset thresholds Y1 and Y2 to perform self-check on the status of all fiber amplifiers; The working process of the line evaluation module also includes: Obtaining the performance parameter variation data of the jth optical signal of the i-th node of the line within a set time period; According to the performance parameter variation data of the j-th optical signal of the i-th node over time, the performance parameter variation function f of the j-th optical signal of the i-th node over time is fitted. ij (t); Obtaining the time-varying data of the kth environmental parameter affecting the jth optical signal at the i-th node; The kth environmental parameter affecting the jth optical signal at the ith node varies with time. The kth environmental parameter affecting the jth optical signal at the ith node varies with time. jk (t); The state prediction coefficient B of the i-th node is calculated by the following formula i : In the formula, x is the number of environmental parameters affecting the jth optical signal at the i-th node, k belongs to x, ω j is the correlation coefficient corresponding to the jth optical signal of the preset i-th node, is the correlation coefficient of the kth environmental parameter affecting the jth optical signal at the preset i-th node; According to the state prediction coefficient B of the i-th node i Predict the future state of the i-th node of the line, t3-t4 is the set time period; According to the state prediction coefficient B of the i-th node i The process of predicting the future state of the i-th node of the line includes: The state prediction coefficient B of the node at the i-th position of the line i With the preset threshold B th To compare: If B i ≥B th , then it is judged that the possibility of potential faults in the future at the node i of the line is high; Otherwise, it is judged that the probability of a potential fault in the future at the i-th node of the line is low; Calculate the state prediction coefficient B of n line nodes in turn n And compared with the system preset threshold B th Compare and evaluate the future status of all line nodes.

2. According to claim 1, a 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier is characterized in that: The working process of the line evaluation module includes: Obtaining various performance parameter values ​​of the optical signal of the i-th node; The values ​​of various performance parameters are compared with the corresponding standards respectively: if there are performance parameter values ​​that do not meet the standards, it is judged that there is a fault at the i-th node of the line; otherwise, the status of the i-th node of the line is judged based on the overall deviation of the values ​​of various performance parameters at the i-th node.

3. According to claim 2, a 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier is characterized in that: The process of judging the state of the i-th node of the line according to the overall deviation of the performance parameter values ​​of the i-th node includes: Get the real-time data f of the jth optical signal of the i-th node of the line ij ; The node state coefficient A at the i-th position is calculated by the following formula i : Where M is the number of performance parameters of the collected optical signal, j∈[1,M], f ij0 is the standard value of the performance parameter of the jth optical signal, f th is the reference value of the performance parameter of the jth optical signal; k j is the correlation coefficient of the performance parameter of the j-th optical signal; The state coefficient of the node at the i-th position of the line is compared with the preset threshold A th To compare: If A i ≥A th , then it is judged that the possibility of a fault at the i-th node of the line is high; Otherwise, it is judged that the probability of a fault at the i-th node of the line is low; Calculate the state coefficient A of n line nodes in turn n And with the system preset threshold A th Compare and evaluate the status of all line nodes.

4. According to claim 1, a 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier is characterized in that: The system also includes a display system, which displays a real-life map of the transmission line, and the real-life map marks the locations of all monitoring nodes.

5. According to claim 4, a 400G all-optical network long-distance transmission line monitoring system based on RFA Raman amplifier is characterized in that: When the early warning system issues an early warning, it will be displayed at the corresponding node position in the real-life map, allowing management personnel to quickly find the fault point.

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