Method and system for intelligently monitoring received optical power of optical module based on DDM

Abstract

The invention relates to the technical field of optical module signal transmission fault monitoring, in particular to an optical module receiving optical power intelligent monitoring method and system based on DDM. And obtaining the performance degree of the received optical power at the target moment on the fault by combining the relationship between the received optical power in the neighborhood time period and a normal preset range and the fluctuation characteristics of the received optical power, and obtaining the transmission loss fluctuation degree of the received optical power at the target moment according to the fluctuation condition of the optical attenuation degree in the neighborhood time period. And obtaining the fault degree of the to-be-analyzed optical module at the target moment according to the change correlation between the expression degree and the transmission loss fluctuation degree in the neighborhood time period, thereby realizing accurate fault monitoring of the received optical power of the to-be-analyzed optical module.

Description

Technical Field

[0001] The present invention relates to the technical field of optical module signal transmission fault monitoring, and particularly to an intelligent monitoring method and system for the received optical power of an optical module based on DDM. Background Technique

[0002] DDM (Digital Diagnostic Monitoring) is a digital diagnostic monitoring technology used to monitor optical module parameters in real time, including DDM information of optical modules such as transmitted optical power, received optical power, and ambient temperature. This technology is very important for optical communication systems because it can help users detect potential problems in a timely manner and perform maintenance, thereby improving the stability and reliability of the system.

[0003] The stability of the received optical power of an optical module directly affects the quality of optical communication. If the received optical power is too low, the signal cannot be correctly decoded, resulting in error codes; if the received optical power is too high, the optical module will be overloaded, which will also affect the communication quality. Since the optical module is easily affected by environmental factors and transmitted optical power during use, the stability of the received optical power of the optical module is damaged. The unstable received optical power leads to low data transfer efficiency, resulting in phenomena such as network latency and slow speed.

[0004] Therefore, it is crucial to intelligently monitor the received optical power of the optical module. Although the optical module has an APC (automatic power control) module that can ensure the received optical power of the optical module remains stable as much as possible, the optical module has faults or other factors that can cause the received optical power of the optical module to be abnormal. Since the analysis of the received optical power is often used for fault diagnosis of the optical module, the fault analysis of the optical module based on the received optical power will be inaccurate. Faults of other devices (such as other optical modules) in the optical link will cause the received optical power of the optical module to be analyzed to be abnormal and the monitoring to be inaccurate. The inaccurate received optical power will misjudge the true abnormality of the optical module and cannot accurately analyze whether the current optical module has a real fault or whether the received optical power of the optical module has a normal change due to external factors. At this time, it all shows that the stability of the received optical power is damaged. Summary of the Invention

[0005] In order to solve the technical problem of inaccurate fault diagnosis results of the received optical power of the existing optical module, the purpose of the present invention is to provide an intelligent monitoring method and system for the received optical power of an optical module based on DDM. The specific technical solutions adopted are as follows: In the first aspect of the present invention, an intelligent monitoring method for the received optical power of an optical module based on DDM is provided, including: According to the change trend of the fitted value of the received optical power within the neighborhood time period corresponding to the target time of the optical module to be analyzed and the difference between the fitted value and the actual value, combined with the relationship between the received optical power within the neighborhood time period and the normal preset range, as well as the fluctuation characteristics of the received optical power, the manifestation degree of the received optical power at the target time for the fault is obtained; the fluctuation characteristics characterize the abnormal fluctuation situation of the received optical power within the neighborhood time period; According to the fluctuation situation of the optical attenuation degree within the neighborhood time period, the transmission loss fluctuation degree of the received optical power at the target time is obtained; the optical attenuation degree is used to characterize the power attenuation situation between the optical module to be analyzed and its previous optical module; Regarding the change correlation relationship between the manifestation degree and the transmission loss fluctuation degree within the neighborhood time period, the fault degree of the optical module to be analyzed at the target time is obtained.

[0006] In an exemplary embodiment, the obtaining process of the fluctuation characteristics includes: Based on the relationship with the normal preset range, the number of abnormal received optical powers within the neighborhood time period is obtained; The standard deviation of the received optical power within the neighborhood time period is obtained; According to the number and the standard deviation, the fluctuation characteristics are obtained, and the fluctuation characteristics are directly proportional to both the number and the standard deviation.

[0007] In an exemplary embodiment, the obtaining process of the manifestation degree includes: A first fitting line is fitted from the received optical powers at each neighboring time, and the absolute value of the slope of the first fitting line is obtained as the change trend of the fitted value; the fitted value is the value at each neighboring time on the first fitting line; each neighboring time is each time within the neighborhood time period; According to the fitting differences at each neighboring time, the fluctuation characteristics at each neighboring time, and the relationship between the received optical power at each neighboring time and the normal preset range, the change characteristics of the received optical power at the target time are obtained; the fitting difference is the difference between the fitted value and the actual value; According to the change characteristics of the received optical power at the target time and the change trend of the fitted value, the manifestation degree of the received optical power at the target time for the fault is obtained.

[0008] In an exemplary embodiment, the obtaining process of the relationship between the received optical power at the neighboring time and the normal preset range includes: If the received optical power at the neighboring time is outside the normal preset range, the distance characteristic at the neighboring time is 0; If the received optical power at the adjacent time is within the normal preset range, obtain the minimum value of the absolute values of the differences between the received optical power at the adjacent time and the two boundary values of the normal preset range, as the distance feature at the adjacent time.

[0009] In an exemplary embodiment, the process of obtaining the change feature includes: According to the fitting difference at the adjacent time, the fluctuation feature at the adjacent time, and the distance feature at the adjacent time, obtain the change sub-feature of the received optical power at the adjacent time; the change sub-feature is proportional to the fitting difference and the fluctuation feature, and inversely proportional to the distance feature; Fuse the change sub-features of all adjacent times within the neighborhood time period to obtain the change feature of the received optical power at the target time.

[0010] In an exemplary embodiment, the process of obtaining the transmission loss fluctuation degree includes: Obtain the average value of the optical attenuation degree and the minimum value of the optical attenuation degree within the neighborhood time period; Obtain the first absolute value of the difference between the average value of the optical attenuation degree and the preset standard optical attenuation degree, and the second absolute value of the difference between the average value of the optical attenuation degree and the minimum value of the optical attenuation degree; Fuse the first absolute value of the difference and the second absolute value of the difference to obtain the transmission loss fluctuation degree.

[0011] In an exemplary embodiment, the process of obtaining the fault degree includes: Map the performance degree and the transmission loss fluctuation degree of each adjacent time to a two-dimensional coordinate system and fit to obtain a second fitting line, and determine the fitted transmission loss fluctuation degree of each adjacent time according to the second fitting line; each adjacent time is each time within the neighborhood time period; the two-dimensional coordinate system is constructed with the performance degree as the horizontal axis and the transmission loss fluctuation degree as the vertical axis; According to the difference between the fitted transmission loss fluctuation degree and the actual transmission loss fluctuation degree of each adjacent time, obtain the comprehensive difference of the transmission loss fluctuation degree at the target time; Obtain a correction coefficient from the comprehensive difference of the transmission loss fluctuation degree, and the correction coefficient is inversely proportional to the comprehensive difference of the transmission loss fluctuation degree; According to the performance degree and the transmission loss fluctuation degree at the target time, and the correction coefficient, obtain the fault degree of the optical module to be analyzed at the target time.

[0012] In an exemplary embodiment, the obtaining the fault degree of the optical module to be analyzed at the target time according to the performance degree and the transmission loss fluctuation degree at the target time, and the correction coefficient includes: Multiply the correction coefficient by the fault feature to obtain the fault degree, where the fault feature is obtained by fusing the manifestation degree at the target moment and the fluctuation degree of the transmission loss.

[0013] In an exemplary embodiment, the intelligent monitoring method for the received optical power of an optical module based on DDM further includes: Compare the fault degree of the optical module to be analyzed at the target moment with a preset fault degree threshold. If it is greater than or equal to the preset fault degree threshold, it is determined that there is a fault in the received optical power of the optical module to be analyzed at the target moment.

[0014] In the second aspect of the present invention, there is provided an intelligent monitoring system for the received optical power of an optical module based on DDM, including: a memory and a processor; the memory is connected to the processor; the memory is used to store program instructions; the processor is used to implement the above-mentioned intelligent monitoring method for the received optical power of an optical module when the program instructions are executed.

[0015] The present invention has the following beneficial effects: Based on the characteristic that the received optical power of the optical module to be analyzed in the optical link should be maintained stable, the manifestation degree of the received optical power of the optical module to be analyzed at the target moment for faults is obtained; according to the power attenuation situation between the optical module to be analyzed and the previous optical module, the attenuation during the optical signal transmission process is determined, and the fluctuation degree of the transmission loss of the received optical power at the target moment is obtained. Thus, it can be determined whether the fluctuation of the received optical power is caused by external factors of the optical module to be analyzed. Finally, by combining the change correlation relationship between the manifestation degree of the received optical power for faults and the fluctuation degree of the transmission loss within the neighboring time period, the fault degree of the optical module to be analyzed at the target moment is obtained, realizing accurate fault monitoring of the received optical power of the optical module to be analyzed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flowchart of an intelligent monitoring method for the received optical power of an optical module based on DDM provided by an embodiment of the present invention; Figure 2 is a flowchart for obtaining the fluctuation characteristics provided by an embodiment of the present invention; Figure 3 is a flowchart for obtaining the manifestation degree provided by an embodiment of the present invention; Figure 4 is a flowchart for obtaining the change characteristics provided by an embodiment of the present invention; Figure 5 is a flowchart for obtaining the fluctuation degree of the transmission loss provided by an embodiment of the present invention; Figure 6 is a flowchart for obtaining the fault degree provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. All data information collected in this application has been obtained with full consent and authorization.

[0019] As a specific scenario, a certain optical module in an optical link is used as the optical module to be analyzed. Since the fault diagnosis of the optical module to be analyzed is often carried out by analyzing the stability of the received optical power of the optical module to be analyzed. Therefore, in order to enable accurate fault diagnosis through DDM data, it is necessary to judge whether the received optical power can reflect the faults of the actual optical module to be analyzed. For example, the optical module is loose, has poor connection, is bent and broken, or components such as lasers inside the optical module are aged and damaged during use. These factors will all affect the received optical power of the optical module to be analyzed. In order to further judge whether the received optical power of the optical module to be analyzed is affected by external environmental interference or there is a fault in the optical link, it is necessary to monitor the DDM data of the optical module to be analyzed in real time. To solve the above problems, this embodiment provides an intelligent monitoring method for the received optical power of an optical module based on DDM.

[0020] As Figure 1 shown, an intelligent monitoring method for the received optical power of an optical module based on DDM provided in this embodiment includes: Step S1: According to the change trend of the fitting value of the received optical power within the neighborhood time period corresponding to the target time of the optical module to be analyzed and the difference between the fitting value and the actual value, combined with the relationship between the received optical power within the neighborhood time period and the normal preset range, as well as the fluctuation characteristics of the received optical power, obtain the degree of manifestation of the received optical power at the target time for faults; Step S2: According to the fluctuation of the optical attenuation degree within the neighborhood time period, obtain the fluctuation degree of the transmission loss of the received optical power at the target time; Step S3: For the change correlation relationship between the manifestation degree and the transmission loss fluctuation degree within the neighborhood time period, obtain the fault degree of the optical module to be analyzed at the target time.

[0021] The following, in conjunction with the accompanying drawings, specifically describes the implementation process of each step.

[0022] Step S1: According to the change trend of the fitted value of the received optical power within the neighborhood time period corresponding to the target time of the optical module to be analyzed, the difference between the fitted value and the actual value, combined with the relationship between the received optical power within the neighborhood time period and the normal preset range, and the fluctuation characteristics of the received optical power, obtain the degree of manifestation of the received optical power at the target time for the fault.

[0023] In an exemplary embodiment, the received optical power of the optical module to be analyzed at each moment is obtained according to a preset sampling frequency. For example, the sampling frequency is once per second. For any moment, for the sake of convenience of explanation, it is defined as the target time. In this embodiment, the target time can be the current time. By obtaining the degree of fault at the current time of the optical module to be analyzed, real-time fault monitoring of the optical module to be analyzed is realized.

[0024] Determine the neighborhood time period of the target time. The neighborhood time period is a locally relevant time period of the target time in the time series data, and the positional relationship between the target time and its neighborhood time period is also set by the implementer according to actual needs. In an exemplary embodiment, the neighborhood time period of the target time is specifically: taking the previous moment of the target time as the cut-off moment, and taking a preset number of moments as the length of the neighborhood time period to construct the neighborhood time period of the target time. The preset number is set by the implementer according to actual needs, such as 30. Set each moment within the neighborhood time period of the target time as each neighboring moment of the target time. It should be understood that in order to ensure that each moment has its corresponding neighborhood time period, starting from the preset number of moments in the time series, each subsequent moment is the moment for which fault monitoring is required, so as to ensure that each moment has its corresponding neighborhood time period.

[0025] When the optical module to be analyzed has its own fault, for example, the connection is loose, resulting in poor contact between the transmitting / receiving ports of the optical module to be analyzed and its previous optical module, resulting in random loss of optical signals during the coupling process. A slight displacement of the connector will cause a decrease in the alignment accuracy of the optical signal, and part of the optical energy cannot be effectively coupled into the optical fiber or detector, resulting in an instantaneous power drop. Therefore, when the optical module to be analyzed just has a fault, it will cause large fluctuations in the monitored received optical power.

[0026] Obtain the fluctuation characteristics of the neighborhood time period of the target time. The fluctuation characteristics characterize the abnormal fluctuation situation of the received optical power within the neighborhood time period of the target time.

[0027] In an exemplary embodiment, as Figure 2 shown, the following gives a specific process for obtaining the fluctuation characteristics: Step S1-1: Based on the relationship with the normal preset range, obtain the number of abnormal received optical powers within the neighborhood time period.

[0028] There is a normal preset range for the received optical power. If the received optical power is within the normal preset range, it indicates that the received optical power is at a normal level; otherwise, the received optical power is abnormal. The two boundary values of the normal preset range are the upper limit value and the lower limit value respectively. If the actual received optical power is greater than the upper limit value, it means the received optical power is overloaded; if the received optical power is less than the lower limit value, it means the receiving sensitivity of the received optical power is too low.

[0029] Compare the received optical powers at each adjacent moment within the neighborhood time period with this normal preset range. If it is within this normal preset range, that is, greater than or equal to the lower limit value of the normal preset range and less than or equal to the upper limit value, it is determined that the received optical power is normal; if it is outside this normal preset range, that is, not within this normal preset range, that is, less than the lower limit value of the normal preset range or greater than the upper limit value, it is determined that the received optical power is abnormal. Thus, it is determined whether the received optical power at each adjacent moment within the neighborhood time period is normal, and then the number of abnormal received optical powers within the neighborhood time period is obtained. The more the number of abnormal received optical powers, the more obvious the fluctuation characteristics, and the higher the possibility that there is a real fault at the target moment of the optical module to be analyzed.

[0030] Step S1-2: Obtain the standard deviation of the received optical power within the neighborhood time period.

[0031] Obtain the standard deviation of the received optical powers at each adjacent moment within the neighborhood time period, and characterize the fluctuation of the received optical power within the neighborhood time period from the aspect of the standard deviation. The larger the standard deviation, the stronger the fluctuation, that is, the more obvious the fluctuation characteristics, and the higher the possibility that there is a real fault at the target moment of the optical module to be analyzed.

[0032] Step S1-3: Obtain the fluctuation characteristics based on the quantity and the standard deviation.

[0033] Obtain the fluctuation characteristics of the neighborhood time period from the two aspects of the number of abnormal received optical powers within the neighborhood time period and the standard deviation of the received optical power. The fluctuation characteristics are directly proportional to both the number of abnormal received optical powers and the standard deviation. In an exemplary embodiment, calculate the product of the number of abnormal received optical powers and the standard deviation, and normalize this product. The normalized result is the fluctuation characteristic of the neighborhood time period. The normalization method here can be: the sigmoid function. The larger the value of the fluctuation characteristic, the higher the possibility that there is a real fault in the optical module to be analyzed at the target moment in the optical link.

[0034] Then, based on the change trend of the fitting value of the received optical power within the neighborhood time period corresponding to the target moment of the optical module to be analyzed and the difference between the fitting value and the actual value, combined with the relationship between the received optical power within the neighborhood time period and the normal preset range, and the fluctuation characteristics of the received optical power, obtain the degree of manifestation of the received optical power at the target moment for the fault.

[0035] Since the normal preset range of the received optical power is relatively large, when it is within the normal preset range, it may cause the received optical power of the optical module to be analyzed at this time to appear normal, but in fact there are still large fluctuations (that is, fluctuations within the normal preset range, but the received optical power reflects that there are abnormalities in the optical module to be analyzed in the optical link), resulting in a small abnormality in the actual received optical power. Therefore, when the optical module to be analyzed first fails, the accuracy of fault judgment is not high.

[0036] After the optical module to be analyzed fails, if no relevant measures are taken in time, there is a high probability that the subsequent optical module to be analyzed will continue to have fault characteristics. As the usage time increases, the faults of the optical module to be analyzed become more and more obvious, showing a trend. For example: the existence of faults will accelerate the aging of the components of the optical module to be analyzed, resulting in a decreasing trend in the received optical power of the optical module to be analyzed. The more obvious the decreasing trend, the higher the probability that the optical module to be analyzed has a fault. On the contrary, due to the existence of the APC automatic power control function in the optical module to be analyzed, it can maintain the stability of the received optical power and provide a relatively stable optical communication signal. Therefore, the received optical power of the optical module to be analyzed in the normal optical link does not have an obvious decreasing trend.

[0037] In an exemplary embodiment, as Figure 3 shown, the following gives a specific acquisition process of the manifestation degree: Step S1-4: Fit the received optical powers at each adjacent moment to obtain a first fitting straight line, and obtain the absolute value of the slope of the first fitting straight line as the change trend of the fitting value.

[0038] Perform a linear fit on the received optical powers at each adjacent moment within the neighborhood time period corresponding to the target moment of the optical module to be analyzed to obtain a first fitting straight line. Then obtain the absolute value of the slope of this first fitting straight line as the change trend of the fitting value. The change trend of the fitting value reflects the change trend of the received optical power of the optical module to be analyzed in terms of time series. The larger the absolute value of the slope, the more obvious the decreasing trend of the received optical power, and the more obvious the change characteristics of the received optical power within the neighborhood time period.

[0039] The fitting value of the received optical power within the neighborhood time period is the value of each adjacent moment on this first fitting straight line.

[0040] Step S1-5: Obtain the change characteristics of the received optical power at the target moment according to the fitting differences at each adjacent moment, the fluctuation characteristics at each adjacent moment, and the relationship between the received optical power at each adjacent moment and the normal preset range.

[0041] Obtain the fitting differences at each adjacent moment. The fitting difference is the difference between the fitting value (i.e., the fitting received optical power on the first fitting line) and the actual value (i.e., the actual received optical power), specifically the absolute value of the difference. The larger the fitting difference, the more obvious the change characteristic of the received optical power, and the more abnormal the received optical power.

[0042] Obtain the relationship between the received optical power at each adjacent moment and the normal preset range. Among them, for any adjacent moment, if the received optical power at the adjacent moment is outside the normal preset range, that is, the received optical power at the adjacent moment is abnormal, then the distance characteristic of the adjacent moment is 0; if the received optical power at the adjacent moment is within the normal preset range, that is, the received optical power at the adjacent moment is normal, then obtain the minimum value of the absolute value of the difference between the received optical power at the adjacent moment and the two boundary values of the normal preset range as the distance characteristic of the adjacent moment. Among them, calculate the absolute value of the difference between the received optical power at the adjacent moment and the upper limit value of the normal preset range, and calculate the absolute value of the difference between the received optical power at the adjacent moment and the lower limit value of the normal preset range, and obtain the minimum value of these two absolute values of the difference as the distance characteristic of the adjacent moment. The larger the distance characteristic, the less obvious the change characteristic of the received optical power, and the more normal the received optical power.

[0043] The more obvious the fluctuation characteristic of each adjacent moment, the more obvious the change characteristic of the received optical power.

[0044] In an exemplary embodiment, as Figure 4 shown, the following gives a specific acquisition process of the change characteristic: Step S1-5-1: Obtain the change sub-characteristic of the received optical power at the adjacent moment according to the fitting difference, the fluctuation characteristic and the distance characteristic of the adjacent moment.

[0045] For any adjacent moment, obtain the change sub-characteristic of the received optical power at the adjacent moment according to the fitting difference, the fluctuation characteristic and the distance characteristic of the adjacent moment. Among them, the change sub-characteristic is directly proportional to the fitting difference and the fluctuation characteristic, and inversely proportional to the distance characteristic.

[0046] In an exemplary embodiment, the following gives a specific quantization method of the change sub-characteristic: ; Among them, represents the change sub-characteristic of the received optical power at the i-th adjacent moment, represents the fitting difference of the received optical power at the i-th adjacent moment, represents the normalization of , such as the sigmoid function, Denote the distance feature at the i-th adjacent moment, and exp represents the exponential function with the natural constant e as the base. Denote the fluctuation feature at the i-th adjacent moment. For Perform negative correlation normalization.

[0047] Denote the normalization of Here, the normalization method can be: obtain the maximum and minimum values in corresponding to all adjacent moments of the target moment, and adopt the maximum-minimum normalization method to normalize the at the i-th adjacent moment.

[0048] Step S1-5-2: Fuse the change sub-features of all adjacent moments within the neighborhood time period to obtain the change feature of the received optical power at the target moment.

[0049] Calculate the average value of the change sub-features of all adjacent moments within the neighborhood time period of the target moment as the change feature of the received optical power at the target moment.

[0050] Step S1-6: Obtain the manifestation degree of the received optical power at the target moment with respect to the fault according to the change feature of the received optical power at the target moment and the change trend of the fitting value.

[0051] The more obvious the change feature of the received optical power at the target moment, the greater the fault possibility of the received optical power at the target moment, that is, the stronger the manifestation degree with respect to the fault; the greater the change trend of the fitting value at the target moment, the greater the fault possibility of the received optical power at the target moment, that is, the stronger the manifestation degree with respect to the fault. Then, according to the change feature of the received optical power at the target moment and the change trend of the fitting value, obtain the manifestation degree of the received optical power at the target moment with respect to the fault, and the manifestation degree is proportional to both the change feature and the change trend of the fitting value.

[0052] In an exemplary embodiment, normalize the change trend of the fitting value of the received optical power at the target moment. For example, use the sigmoid function for normalization, and take the product of the normalized change trend of the fitting value and the change feature of the received optical power at the target moment as the manifestation degree of the received optical power at the target moment with respect to the fault. The above calculation logic is: Since when there is a stable fault in the optical module to be analyzed, it will also cause the change trend of the fitting value of the received optical power to be in a stable state. At this time, use the change feature of the received optical power at the target moment to correct the normalized change trend of the fitting value.

[0053] Adopt the above process to obtain the manifestation degree of the received optical power at each moment in time series with respect to the fault.

[0054] Step S2: Obtain the fluctuation degree of the transmission loss of the received optical power at the target moment according to the fluctuation of the optical power attenuation degree within the neighborhood time period.

[0055] The variation of the received optical power is affected by various factors, and external changes will also cause abnormalities in the monitoring of the received optical power, making it impossible to accurately obtain the real faults that may exist in the optical link. During the operation of the optical module to be analyzed, internal lasers or optical attenuators will affect the transmitted optical power. For example, the threshold current of the laser increases, the luminous efficiency decreases, etc., resulting in the fact that the actually transmitted optical power is not constant. Due to the normal adjustment of the transmitted optical power, it is normal for the optical module to be analyzed to have a change in the received optical power.

[0056] Obtain the optical power attenuation degree according to the power attenuation situation between the optical module to be analyzed and its previous optical module. The optical power attenuation degree is used to characterize the power attenuation situation between the optical module to be analyzed and its previous optical module. It should be understood that to determine the previous optical module of the optical module to be analyzed, the transmitting port of the previous optical module is connected to the receiving port of the optical module to be analyzed through an optical fiber. For any adjacent moment, obtain the transmitted optical power of the previous optical module at the adjacent moment. According to the power attenuation situation between the transmitted optical power of the previous optical module at the adjacent moment and the received optical power of the optical module to be analyzed, obtain the optical power attenuation degree at the adjacent moment.

[0057] Since the transmitted optical power of the previous optical module is greater than or equal to the received optical power of the optical module to be analyzed, the more severe the power attenuation situation, the greater the transmitted optical power of the previous optical module is greater than the received optical power of the optical module to be analyzed, that is, the greater the gap between the two. In an exemplary embodiment, the optical power attenuation degree is specifically the optical attenuation coefficient, and the calculation formula is as follows: ; Wherein, represents the optical attenuation coefficient at the i-th adjacent moment for optical module A and optical module B. Optical module A is the optical module to be analyzed, and optical module B is the previous optical module of the optical module to be analyzed. L is the optical fiber length between the transmitting port of optical module B and the receiving port of optical module A, represents the received optical power of optical module A at the i-th adjacent moment; represents the transmitted optical power of optical module B at the i-th adjacent moment.

[0058] In the above manner, obtain the optical power attenuation degree at each adjacent moment within the neighborhood time period.

[0059] Since the distance of the optical fiber remains unchanged during the operation of the optical module, under normal circumstances, the degree of optical attenuation should be basically stable at each moment. However, if there are large fluctuations in the degree of optical attenuation or it remains at a high level during the neighboring time period, it indicates that the received optical power of the optical module to be analyzed is abnormal, reflecting a real fault in the optical link.

[0060] In an exemplary embodiment, as Figure 5 shown, a specific process for obtaining the degree of transmission loss fluctuation is given as follows: Step S2-1: Obtain the average value of the optical attenuation degree and the minimum value of the optical attenuation degree within the neighboring time period.

[0061] Calculate the average value of the optical attenuation degrees at each neighboring moment within the neighboring time period to obtain the average value of the optical attenuation degree within the neighboring time period. And obtain the minimum value among the optical attenuation degrees at each neighboring moment within the neighboring time period to obtain the minimum value of the optical attenuation degree.

[0062] Step S2-2: Obtain the absolute value of the first difference between the average value of the optical attenuation degree and the preset standard optical attenuation degree, and the absolute value of the second difference between the average value of the optical attenuation degree and the minimum value of the optical attenuation degree.

[0063] Preset a standard optical attenuation degree, which is the theoretical optical attenuation coefficient. This value is a known value and can be obtained from the characteristics of the optical link, specifically obtained during the initial connection of the optical link.

[0064] Calculate the absolute value of the difference between the average value of the optical attenuation degree and the preset standard optical attenuation degree, defined as the absolute value of the first difference; calculate the absolute value of the difference between the average value of the optical attenuation degree and the minimum value of the optical attenuation degree, defined as the absolute value of the second difference.

[0065] Step S2-3: Combine the absolute value of the first difference and the absolute value of the second difference to obtain the degree of transmission loss fluctuation.

[0066] Calculate the sum of the absolute value of the first difference and the absolute value of the second difference, and normalize this sum value, for example, using the sigmoid function for normalization. The normalized result is the degree of transmission loss fluctuation within the neighboring time period. The degree of transmission loss fluctuation reflects whether the attenuation of the received optical power of the optical module to be analyzed in the optical link belongs to normal variation. The greater the degree of transmission loss fluctuation, the less the attenuation situation within the neighboring time period belongs to normal variation, indicating that the possibility of a real fault in the optical module to be analyzed in the optical link is higher.

[0067] Step S3: Obtain the degree of fault at the target moment of the optical module to be analyzed based on the change correlation between the performance degree and the degree of transmission loss fluctuation within the neighboring time period.

[0068] Based on the change correlation relationship between the performance degree and the transmission loss fluctuation degree within the neighborhood time period, the fault degree of the optical module to be analyzed at the target moment is obtained.

[0069] If there is a high correlation (positive correlation) between the transmission loss fluctuation degree and the performance degree, it indicates that the optical module to be analyzed is in a normal working state, or there is a fault but the impact on the optical module to be analyzed remains stable at this time; if the correlation is small, it indicates that the change in the performance degree is not related to the change in the transmission loss fluctuation degree, indicating that the change in the received optical power is a normal change due to the transmission change of other optical modules, indicating that the optical module to be analyzed is less likely to be a real device fault and belongs to a normal variation.

[0070] In an exemplary embodiment, as Figure 6 shown, a specific acquisition process of the fault degree is given as follows: Step S3-1: Map the performance degree and the transmission loss fluctuation degree of each adjacent moment to a two-dimensional coordinate system and fit to obtain a second fitting line, and determine the fitting transmission loss fluctuation degree of each adjacent moment according to the second fitting line.

[0071] Since the performance degree and the transmission loss fluctuation degree jointly represent the real fault situation of the optical module to be analyzed, therefore, when it shows the real fault of the optical module to be analyzed, the performance degree and the transmission loss fluctuation degree are relatively large; if the optical module to be analyzed is in normal operation, both the performance degree and the transmission loss fluctuation degree are relatively small.

[0072] Construct a two-dimensional coordinate system with the performance degree as the horizontal axis and the transmission loss fluctuation degree as the vertical axis.

[0073] According to the performance degree and the transmission loss fluctuation degree of each adjacent moment, obtain the two-dimensional coordinate points of each adjacent moment, map the two-dimensional coordinate points of each adjacent moment to the above two-dimensional coordinate system and perform linear fitting to obtain a second fitting line. Based on the performance degree of each adjacent moment, obtain the fitting transmission loss fluctuation degree corresponding to the performance degree of each adjacent moment on the second fitting line.

[0074] Then, the transmission loss fluctuation degree (i.e., the actual transmission loss fluctuation degree) and the fitting transmission loss fluctuation degree of each adjacent moment can be obtained.

[0075] Step S3-2: Obtain the comprehensive difference of the transmission loss fluctuation degree at the target moment according to the difference between the fitting transmission loss fluctuation degree and the actual transmission loss fluctuation degree of each adjacent moment.

[0076] For any adjacent moment, obtain the difference between the fitting transmission loss fluctuation degree and the actual transmission loss fluctuation degree at that adjacent moment, specifically the absolute value of the difference. The smaller the absolute value of the difference, the smaller the difference between the fitting transmission loss fluctuation degree and the actual transmission loss fluctuation degree, and the more relevant the change in the performance degree is to the change in the transmission loss fluctuation degree.

[0077] Then fuse the differences between the fitting transmission loss fluctuation degree and the actual transmission loss fluctuation degree at each adjacent moment. The specific fusion method here is to calculate the average value of the differences between the fitting transmission loss fluctuation degree and the actual transmission loss fluctuation degree at each adjacent moment, and the obtained average value is the comprehensive difference in the transmission loss fluctuation degree at the target moment.

[0078] Step S3-3: Obtain a correction coefficient from the comprehensive difference in the transmission loss fluctuation degree.

[0079] Obtain the correction coefficient at the target moment from the comprehensive difference in the transmission loss fluctuation degree at the target moment. The correction coefficient is used to correct the performance degree and the transmission loss fluctuation degree at the target moment. Among them, the smaller the comprehensive difference in the transmission loss fluctuation degree, the more necessary it is to increase the performance degree and the transmission loss fluctuation degree at the target moment, so as to improve the accuracy of fault judgment. Therefore, the correction coefficient is inversely proportional to the comprehensive difference in the transmission loss fluctuation degree. In an exemplary embodiment, perform negative correlation normalization on the comprehensive difference in the transmission loss fluctuation degree, and the result after negative correlation normalization is the correction coefficient. It should be understood that since the numerical range of the difference between the fitting transmission loss fluctuation degree and the actual transmission loss fluctuation degree at each adjacent moment is 0-1, then the numerical range of the comprehensive difference in the transmission loss fluctuation degree is also 0-1. Therefore, the negative correlation normalization method here can be: use the difference between the value 1 and the comprehensive difference in the transmission loss fluctuation degree as the correction coefficient.

[0080] Step S3-4: Obtain the fault degree of the optical module to be analyzed at the target moment according to the performance degree and the transmission loss fluctuation degree at the target moment, and the correction coefficient.

[0081] Fuse the performance degree and the transmission loss fluctuation degree at the target moment to obtain the fault feature at the target moment. In an exemplary embodiment, calculate the average value of the performance degree and the transmission loss fluctuation degree at the target moment as the fault feature at the target moment. The average value here is essentially a weighted sum of the performance degree and the transmission loss fluctuation degree, and the weights are both 0.5. Then multiply the correction coefficient at the target moment by the fault feature at the target moment, and the obtained product is the fault degree at the target moment. In this way, the fault degrees at each moment are obtained. The higher the fault degree, the higher the possibility that the received optical power of the optical module to be analyzed has a fault at the target moment.

[0082] In an exemplary embodiment, the intelligent monitoring method for the received optical power of an optical module based on DDM provided in this embodiment further includes the following steps: preset a fault degree threshold, the numerical range of the preset fault degree threshold is 0-1, and the specific value of the preset fault degree threshold is set according to the actual situation. The preset fault degree threshold is used to determine the level of the fault degree of the optical module to be analyzed at the target moment, so as to judge whether there is a fault in the received optical power of the optical module to be analyzed at the target moment. Then, according to the judgment needs, the specific value of the preset fault degree threshold is determined. For example, if a more strict judgment mechanism is required, the preset fault degree threshold can be set smaller. In this embodiment, 0.7 is taken as an example.

[0083] Compare the fault degree of the optical module to be analyzed at the target moment with the preset fault degree threshold. If it is greater than or equal to the preset fault degree threshold, it is determined that there is a fault in the received optical power of the optical module to be analyzed at the target moment. Otherwise, the received optical power of the optical module to be analyzed at the target moment is normal, and the optical module to be analyzed is in a normal working state at the target moment. At this time, if there is a power change, it belongs to a normal change.

[0084] Subsequently, the judgment results of whether there is a fault in the received optical power of the optical module to be analyzed at each moment can be reported in real time for subsequent diagnosis and operation and maintenance.

[0085] This embodiment also provides an intelligent monitoring system for the received optical power of an optical module based on DDM, including: a memory and a processor; the memory is connected to the processor, and the memory is used to store program instructions; the processor is used to implement the steps in the above-mentioned embodiment of the intelligent monitoring method for the received optical power of an optical module based on DDM when the program instructions are executed.

[0086] In an exemplary embodiment, the present invention provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the steps in the above-mentioned embodiment of the intelligent monitoring method for the received optical power of an optical module based on DDM.

[0087] It should be noted that: the above sequence of the embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0088] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

Claims

1. An intelligent monitoring method for the received optical power of an optical module based on DDM, characterized in that, Including: Based on the change trend of the fitted value of the received optical power within the neighborhood time period corresponding to the target time of the optical module to be analyzed and the difference between the fitted value and the actual value, combined with the relationship between the received optical power within the neighborhood time period and the normal preset range, and the fluctuation characteristics of the received optical power, obtain the degree of manifestation of the received optical power at the target time for the fault; the fluctuation characteristics characterize the abnormal fluctuation conditions of the received optical power within the neighborhood time period; Based on the fluctuation conditions of the optical attenuation degree within the neighborhood time period, obtain the fluctuation degree of the transmission loss of the received optical power at the target time; the optical attenuation degree is used to characterize the power attenuation situation between the optical module to be analyzed and its previous optical module; For the change correlation relationship between the manifestation degree and the transmission loss fluctuation degree within the neighborhood time period, obtain the fault degree of the optical module to be analyzed at the target time.

2. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 1, wherein The process of obtaining the fluctuation characteristics includes: Based on the relationship with the normal preset range, obtain the number of abnormal received optical powers within the neighborhood time period; Obtain the standard deviation of the received optical power within the neighborhood time period; Based on the number and the standard deviation, obtain the fluctuation characteristics, and the fluctuation characteristics are directly proportional to both the number and the standard deviation.

3. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 1, wherein The process of obtaining the manifestation degree includes: Fit the received optical powers at each adjacent time to obtain a first fitted straight line, and obtain the absolute value of the slope of the first fitted straight line as the change trend of the fitted value; the fitted value is the value at each adjacent time on the first fitted straight line; each adjacent time is each time within the neighborhood time period; Based on the fitting difference at each adjacent time, the fluctuation characteristics at each adjacent time, and the relationship between the received optical power at each adjacent time and the normal preset range, obtain the change characteristics of the received optical power at the target time; the fitting difference is the difference between the fitted value and the actual value; Based on the change characteristics of the received optical power at the target time and the change trend of the fitted value, obtain the degree of manifestation of the received optical power at the target time for the fault.

4. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 3, characterized in that, The process of obtaining the relationship between the received optical power at the adjacent time and the normal preset range includes: If the received optical power at the adjacent time is outside the normal preset range, the distance characteristic at the adjacent time is 0; If the received optical power at the adjacent time is within the normal preset range, obtain the minimum value of the absolute values of the differences between the received optical power at the adjacent time and the two boundary values of the normal preset range as the distance characteristic at the adjacent time.

5. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 4, characterized in that, The process of obtaining the change characteristics includes: Based on the fitting difference at the adjacent time, the fluctuation characteristics at the adjacent time, and the distance characteristic at the adjacent time, obtain the change sub-characteristics of the received optical power at the adjacent time; the change sub-characteristics are directly proportional to the fitting difference and the fluctuation characteristics, and inversely proportional to the distance characteristic; Fuse the change sub-characteristics of all adjacent times within the neighborhood time period to obtain the change characteristics of the received optical power at the target time.

6. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 1, wherein, The process of obtaining the fluctuation degree of the transmission loss includes: Obtain the average value of the optical attenuation degree and the minimum value of the optical attenuation degree within the neighborhood time period; Obtain the absolute value of the first difference between the average value of the optical power attenuation degree and the preset standard optical power attenuation degree, and the absolute value of the second difference between the average value of the optical power attenuation degree and the minimum value of the optical power attenuation degree; Fuse the absolute value of the first difference and the absolute value of the second difference to obtain the degree of transmission loss fluctuation.

7. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 1, characterized in that The process of obtaining the degree of fault includes: Map the performance degree and the degree of transmission loss fluctuation at each adjacent moment to a two-dimensional coordinate system and fit to obtain a second fitting line, and determine the fitted degree of transmission loss fluctuation at each adjacent moment according to the second fitting line; each adjacent moment is each moment within the neighborhood time period; the two-dimensional coordinate system is constructed with the performance degree as the horizontal axis and the degree of transmission loss fluctuation as the vertical axis; Obtain the comprehensive difference in the degree of transmission loss fluctuation at the target moment according to the difference between the fitted degree of transmission loss fluctuation and the actual degree of transmission loss fluctuation at each adjacent moment; Obtain a correction coefficient from the comprehensive difference in the degree of transmission loss fluctuation, and the correction coefficient is inversely proportional to the comprehensive difference in the degree of transmission loss fluctuation; Obtain the degree of fault of the optical module to be analyzed at the target moment according to the performance degree and the degree of transmission loss fluctuation at the target moment, and the correction coefficient.

8. The intelligent monitoring method for the received optical power of an optical module based on DDM according to claim 7, characterized in that, The obtaining the degree of fault of the optical module to be analyzed at the target moment according to the performance degree and the degree of transmission loss fluctuation at the target moment, and the correction coefficient includes: Multiply the correction coefficient by the fault feature to obtain the degree of fault, and the fault feature is obtained by fusing the performance degree and the degree of transmission loss fluctuation at the target moment.

9. The intelligent monitoring method for received optical power of an optical module based on DDM according to claim 1, characterized in that, The intelligent monitoring method for the received optical power of the optical module based on DDM further includes: Compare the degree of fault of the optical module to be analyzed at the target moment with a preset fault degree threshold. If it is greater than or equal to the preset fault degree threshold, it is determined that there is a fault in the received optical power of the optical module to be analyzed at the target moment.

10. An intelligent monitoring system for the received optical power of an optical module based on DDM, characterized by comprising: A memory and a processor; The memory is connected to the processor; The memory is used to store program instructions; The processor is used to implement the intelligent monitoring method for the received optical power of the optical module based on DDM according to any one of claims 1-9 when the program instructions are executed.

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