Intelligent monitoring method and system for optical module receiving optical power based on DDM

Abstract

The present invention relates to the technical field of optical module signal transmission fault monitoring, and particularly to a DDM-based intelligent monitoring method and system for the received optical power of an optical module. The method and system provide a method for intelligently monitoring the received optical power of an optical module at a target moment of an optical module to be analyzed. The method comprises the following steps: according to a change trend of a fitted value of the received optical power in a neighborhood time period corresponding to a target moment of the optical module to be analyzed and a difference between the fitted value and an actual value, in combination with a relationship between the received optical power in the neighborhood time period and a normal preset range, and a fluctuation characteristic of the received optical power. The method obtains a degree of transmission loss fluctuation of the received optical power at the target moment based on fluctuations in the optical attenuation degree in the neighborhood time period. Based on a changing correlation between the degree of performance in the neighborhood time period and the degree of transmission loss fluctuation, the method obtains the degree of fault of the optical module to be analyzed at the target moment, thereby achieving accurate fault monitoring of the received optical power of the optical module to be analyzed.

Description

Technical Field

[0001] The present invention relates to the technical field of optical module signal transmission fault monitoring, and in particular to a DDM-based optical module received optical power intelligent monitoring method and system. Background Art

[0002] DDM (Digital Diagnostic Monitoring) is a digital diagnostic monitoring technology used to monitor optical module parameters in real time, including transmit and receive optical power, ambient temperature, and other DDM information. This technology is crucial for optical communication systems because it helps users identify potential problems and implement maintenance promptly, thereby improving system stability and reliability.

[0003] The stability of an optical module's received optical power directly impacts the quality of optical communications. If the received optical power is too low, the signal cannot be correctly decoded, resulting in bit errors. Excessive received optical power can overload the optical module, also impacting communication quality. Because optical modules are easily affected by environmental factors and transmitted optical power during use, the stability of the module's received optical power can be compromised. Unstable received optical power leads to inefficient data transmission, resulting in network delays and slow speeds.

[0004] Therefore, intelligent monitoring of the received optical power of optical modules is crucial. Although optical modules include automatic power control (APC) to ensure stable received optical power, module failures or other factors can cause abnormalities in received optical power. Since received optical power analysis is commonly used for optical module fault diagnosis, this can lead to inaccurate fault analysis based on received optical power. Failures in other devices in the optical link (such as other optical modules) can also cause abnormalities in the received optical power of the optical module being analyzed, leading to inaccurate monitoring. Inaccurate received optical power can lead to misinterpretations of actual module anomalies, making it impossible to accurately determine whether the optical module is truly faulty or whether normal fluctuations in received optical power are due to external factors. In both cases, the stability of received optical power is compromised. Summary of the Invention

[0005] In order to solve the technical problem of inaccurate fault diagnosis results of existing optical module received optical power, the purpose of the present invention is to provide a method and system for intelligent monitoring of optical module received optical power based on DDM. The technical solutions adopted are as follows:

[0006] In a first aspect of the present invention, a method for intelligently monitoring the received optical power of an optical module based on DDM is provided, comprising:

[0007] Based on the trend of the fitted value of the received optical power in the neighborhood time period corresponding to the target time of the optical module to be analyzed, as well as the difference between the fitted value and the actual value, combined with the relationship between the received optical power in the neighborhood time period and the normal preset range, and the fluctuation characteristics of the received optical power, the degree to which the received optical power at the target time is affected by the fault is obtained; the fluctuation characteristics represent the abnormal fluctuation of the received optical power in the neighborhood time period;

[0008] According to the fluctuation of the optical attenuation degree in 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 between the optical module to be analyzed and the previous optical module;

[0009] The fault degree of the optical module to be analyzed at the target moment is obtained based on the change correlation between the performance degree and the transmission loss fluctuation degree within the neighborhood time period.

[0010] In an exemplary embodiment, the process of acquiring the fluctuation characteristics includes:

[0011] Based on the relationship with the normal preset range, obtaining the amount of abnormal received optical power in the neighborhood time period;

[0012] Obtaining a standard deviation of received optical power within the neighborhood time period;

[0013] The fluctuation characteristic is obtained according to the quantity and the standard deviation, and the fluctuation characteristic is proportional to both the quantity and the standard deviation.

[0014] In an exemplary embodiment, the process of obtaining the performance level includes:

[0015] A first fitting straight line is obtained by fitting the received optical power at each adjacent time, and an absolute value of the slope of the first fitting straight line is obtained as the fitting value change trend; the fitting value is a value of each adjacent time on the first fitting straight line; the adjacent time is each time within the neighborhood time period;

[0016] Obtaining a variation characteristic of the received optical power at the target moment based on the fitting difference at each adjacent moment, the fluctuation characteristics at each adjacent moment, and the relationship between the received optical power at each adjacent moment and a normal preset range; the fitting difference being the difference between the fitted value and the actual value;

[0017] According to the variation characteristics of the received optical power at the target moment and the variation trend of the fitting value, the degree to which the received optical power at the target moment reflects the fault is obtained.

[0018] In an exemplary embodiment, the process of obtaining the relationship between the received optical power at adjacent moments and the normal preset range includes:

[0019] If the received optical power at the adjacent time is outside the normal preset range, the distance characteristic at the adjacent time is 0;

[0020] If the received optical power at the adjacent moments is within the normal preset range, the minimum value of the absolute value of the difference between the received optical power at the adjacent moments and the two boundary values of the normal preset range is obtained as the distance feature of the adjacent moments.

[0021] In an exemplary embodiment, the process of acquiring the change characteristics includes:

[0022] Obtaining a variation sub-feature of the received optical power at the adjacent moments according to the fitting difference at the adjacent moments, the fluctuation feature at the adjacent moments, and the distance feature at the adjacent moments; wherein the variation sub-feature is proportional to the fitting difference and the fluctuation feature, and inversely proportional to the distance feature;

[0023] The change sub-features of all adjacent moments in the neighborhood time period are fused to obtain the change feature of the received optical power at the target moment.

[0024] In an exemplary embodiment, the process of obtaining the transmission loss fluctuation degree includes:

[0025] Obtaining an average value of light attenuation and a minimum value of light attenuation within the neighborhood time period;

[0026] Obtaining a first absolute value of a difference between the average light attenuation level and a preset standard light attenuation level, and a second absolute value of a difference between the average light attenuation level and the minimum light attenuation level;

[0027] The first absolute value of the difference and the second absolute value of the difference are combined to obtain the transmission loss fluctuation degree.

[0028] In an exemplary embodiment, the process of obtaining the fault degree includes:

[0029] Mapping the performance degree and the transmission loss fluctuation degree at each adjacent moment into a two-dimensional coordinate system and fitting them to obtain a second fitting line, and determining the fitted transmission loss fluctuation degree at each adjacent moment based on the second fitting line; the adjacent moments are moments within the adjacent 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;

[0030] According to the difference between the fitted transmission loss fluctuation degree at each adjacent time and the actual transmission loss fluctuation degree, the comprehensive difference of the transmission loss fluctuation degree at the target time is obtained;

[0031] Obtaining a correction coefficient based on the comprehensive difference in transmission loss fluctuations, wherein the correction coefficient is inversely proportional to the comprehensive difference in transmission loss fluctuations;

[0032] According to the performance level and transmission loss fluctuation level at the target time, and the correction coefficient, the fault level of the optical module to be analyzed at the target time is obtained.

[0033] In an exemplary embodiment, obtaining the fault degree of the optical module to be analyzed at the target moment based on the performance degree and the transmission loss fluctuation degree at the target moment and the correction coefficient includes:

[0034] The correction coefficient is multiplied by the fault feature to obtain the fault degree, where the fault feature is obtained by fusing the performance degree at the target moment and the transmission loss fluctuation degree.

[0035] In an exemplary embodiment, the DDM-based optical module received optical power intelligent monitoring method further includes:

[0036] The fault degree of the optical module to be analyzed at the target moment is compared with a preset fault degree threshold. If the fault degree is greater than or equal to the preset fault degree threshold, it is determined that the received optical power of the optical module to be analyzed at the target moment has a fault.

[0037] In a second aspect of the present invention, a DDM-based optical module receiving optical power intelligent monitoring system is provided, 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 above-mentioned DDM-based optical module receiving optical power intelligent monitoring method when the program instructions are executed.

[0038] 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 maintain stability, the degree of manifestation of the received optical power of the optical module to be analyzed at the target moment to the fault is obtained; according to the power attenuation between the optical module to be analyzed and the previous optical module, the attenuation in the optical signal transmission process is determined, and the transmission loss fluctuation degree of the received optical power at the target moment is obtained, so that it is possible to determine whether the fluctuation of the received optical power is caused by external factors of the optical module to be analyzed based on the transmission loss fluctuation degree, and finally, combined with the change correlation between the degree of manifestation of the received optical power to the fault and the transmission loss fluctuation degree in the neighboring time period, the fault degree of the optical module to be analyzed at the target moment is obtained, and accurate fault monitoring of the received optical power of the optical module to be analyzed is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a flow chart of a method for intelligently monitoring the received optical power of an optical module based on DDM provided by one embodiment of the present invention;

[0040] Figure 2 is a flow chart for obtaining fluctuation characteristics provided by one embodiment of the present invention;

[0041] Figure 3 is a flow chart of obtaining the performance level provided by one embodiment of the present invention;

[0042] Figure 4 is a flow chart for obtaining a change feature provided by an embodiment of the present invention;

[0043] Figure 5 This is a flow chart for obtaining the degree of transmission loss fluctuation provided by one embodiment of the present invention;

[0044] Figure 6 This is a flowchart of obtaining the fault degree provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] To further illustrate the technical means and effects employed by the present invention to achieve its intended objectives, the following detailed description of the specific embodiments, structures, features, and effects of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The data and information collected in this application were obtained with full consent and authorization.

[0047] As a specific scenario, a certain optical module in the optical link is used as the optical module to be analyzed. Since the fault diagnosis of the optical module to be analyzed is often performed 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 actual fault of the optical module to be analyzed, such as: the optical module is loose, poorly connected, bent and broken during use, and the laser inside the optical module is aged and damaged. These factors will affect the received optical power of the optical module to be analyzed. In order to further determine whether the received optical power of the optical module to be analyzed is due to external environmental interference or a fault in the optical link, it is necessary to monitor the DDM data of the optical module to be analyzed in real time. In order to solve the above problems, this embodiment provides an intelligent monitoring method for the received optical power of an optical module based on DDM.

[0048] like Figure 1 As shown, this embodiment provides a DDM-based intelligent monitoring method for receiving optical power of an optical module, including:

[0049] Step S1: Based on the fitting value change trend of the received optical power in the adjacent time period corresponding to the target time of the optical module to be analyzed, as well as the difference between the fitting value and the actual value, combined with the relationship between the received optical power in the adjacent time period and the normal preset range, and the fluctuation characteristics of the received optical power, the degree of fault manifestation of the received optical power at the target time is obtained;

[0050] Step S2: Obtain the transmission loss fluctuation degree of the received optical power at the target time according to the fluctuation of the optical attenuation degree in the neighborhood time period;

[0051] Step S3: Based on the correlation between the performance level and the transmission loss fluctuation level within the neighborhood time period, the fault level of the optical module to be analyzed at the target time is obtained.

[0052] The implementation process of each step is described in detail below with reference to the accompanying drawings.

[0053] Step S1: According to the change trend of the fitted value of the received optical power in the neighborhood time period corresponding to the target moment 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 in the neighborhood time period and the normal preset range, and the fluctuation characteristics of the received optical power, the degree of fault manifestation of the received optical power at the target moment is obtained.

[0054] In an exemplary embodiment, the received optical power of the optical module to be analyzed is obtained at each moment according to a preset sampling frequency. For example, the sampling frequency is once per second. For ease of explanation, any moment is defined as a target moment. In this embodiment, the target moment can be the current moment. By obtaining the fault level of the optical module to be analyzed at the current moment, real-time fault monitoring of the optical module to be analyzed is achieved.

[0055] Determine the neighborhood time period of the target moment. The neighborhood time period serves as the local correlation time period of the target moment in the time series data, and the positional relationship between the target moment 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 moment is specifically as follows: the previous moment of the target moment is used as the cutoff moment, and a preset number of moments are used as the length of the neighborhood time period to construct the neighborhood time period of the target moment. The preset number is set by the implementer according to actual needs, such as 30. Set each moment in the neighborhood time period of the target moment as each adjacent moment of the target moment. 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 moment thereafter is a moment that needs to be monitored for faults, thereby ensuring that each moment has its corresponding neighborhood time period.

[0056] If the optical module being analyzed has a fault, such as a loose connection causing loose contact between the transmit and receive ports of the optical module being analyzed and the preceding optical module, random optical signal loss occurs during the coupling process. Slight connector displacement can reduce optical signal alignment accuracy, preventing some optical energy from being effectively coupled into the optical fiber or detector, resulting in a transient power drop. Consequently, when the optical module being analyzed first experiences a fault, the monitored received optical power can fluctuate significantly.

[0057] The fluctuation characteristics of the neighboring time period of the target time are obtained, where the fluctuation characteristics represent abnormal fluctuations of the received optical power in the neighboring time period of the target time.

[0058] In an exemplary embodiment, Figure 2 As shown, a specific process of obtaining the fluctuation characteristics is given as follows:

[0059] Step S1 - 1 : Based on a relationship with a normal preset range, the number of abnormal received optical powers within a neighborhood time period is obtained.

[0060] Received optical power has a preset normal range. If it's within this range, it's considered normal. Otherwise, it's considered abnormal. The two boundaries of this range are the upper and lower limits. If the actual received optical power exceeds the upper limit, it indicates an optical overload. If it's less than the lower limit, it indicates low sensitivity.

[0061] The received optical power at each adjacent moment in the neighborhood time period is compared with the normal preset range. If it is within the normal preset range, that is, greater than or equal to the lower limit of the normal preset range and less than or equal to the upper limit, the received optical power is determined to be normal. If it is outside the normal preset range, that is, not within the normal preset range, that is, less than the lower limit of the normal preset range or greater than the upper limit, the received optical power is determined to be abnormal. This determines whether the received optical power at each adjacent moment in the neighborhood time period is normal, and further determines the number of abnormal received optical powers in the neighborhood time period. The greater the number of abnormal received optical powers, the more obvious the fluctuation characteristics, and the higher the possibility that the optical module to be analyzed has a real fault at the target time.

[0062] Step S1-2: Obtain the standard deviation of the received optical power within the neighborhood time period.

[0063] Obtain the standard deviation of the received optical power at adjacent times within the adjacent time period. This standard deviation indicates the fluctuation of the received optical power within the adjacent time period. The larger the standard deviation, the stronger the fluctuation, that is, the more obvious the fluctuation is, and the higher the possibility that the optical module under analysis is truly faulty at the target time.

[0064] Step S1-3: Obtain the fluctuation characteristics based on the quantity and standard deviation.

[0065] The fluctuation characteristics of the neighborhood time period are obtained from the number of abnormal received optical powers in the neighborhood time period and the standard deviation of the received optical powers. The fluctuation characteristics are proportional to the number and standard deviation of the abnormal received optical powers. In an exemplary embodiment, the product of the number and standard deviation of the abnormal received optical powers is calculated, and the product is normalized. The normalized result is the fluctuation characteristic of the neighborhood time period. The normalization method here can be: sigmoid function. The larger the numerical value of the fluctuation characteristic, the higher the possibility that the optical module to be analyzed at the target moment has a real fault in the optical link.

[0066] Then, based on the changing trend of the fitted value of the received optical power in the neighborhood time period corresponding to the target moment 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 in the neighborhood time period and the normal preset range, as well as the fluctuation characteristics of the received optical power, the degree of fault manifestation of the received optical power at the target moment is obtained.

[0067] Since the normal preset range of received optical power is large, when it is within the normal preset range, the received optical power of the optical module to be analyzed may appear normal, but in fact there are also large fluctuations (that is, fluctuations within the normal preset range, but the received optical power reflects that there is an abnormality in the optical link of the optical module to be analyzed), resulting in a small abnormality in the actual received optical power. As a result, the accuracy of fault diagnosis is not high when the optical module to be analyzed just fails.

[0068] If a fault occurs in the optical module under analysis, failure to promptly implement appropriate measures will result in a high probability that the fault characteristics will persist in subsequent modules under analysis. This can lead to increasingly noticeable faults over time, exhibiting a trend. For example, a fault can accelerate the aging of the optical module's components, causing the module's received optical power to decrease. The more pronounced the decrease, the higher the likelihood that the module is faulty. Conversely, the automatic power control (APC) function in the optical module maintains a stable received optical power, providing a relatively stable optical communication signal. Consequently, the received optical power of the module under analysis in a normal optical link does not exhibit a significant decrease.

[0069] In an exemplary embodiment, Figure 3 As shown, a specific process of obtaining the performance degree is given as follows:

[0070] Step S1-4: a first fitting straight line is obtained by fitting the received optical powers at adjacent moments, and the absolute value of the slope of the first fitting straight line is obtained as a fitting value variation trend.

[0071] A linear fit is performed on the received optical power at adjacent times within the adjacent time period corresponding to the target time of the optical module being analyzed to obtain a first fitted line. The absolute value of the slope of this first fitted line is then obtained as the fitted value trend. This fitted value trend reflects the changing trend of the received optical power of the optical module being analyzed over time. A larger absolute value of the slope indicates a more pronounced decreasing trend in the received optical power and a more pronounced characteristic of the received optical power changes within the adjacent time period.

[0072] The fitted values of the received optical power in the adjacent time period are the values at each adjacent time instant on the first fitted straight line.

[0073] Step S1-5: Obtain the variation characteristics of the received optical power at the target moment based on 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.

[0074] Obtain the fitting difference between adjacent moments. The fitting difference is the difference between the fitted value (i.e., the fitted received optical power on the first fitted line) and the actual value (i.e., the actual received optical power), specifically the absolute value of the difference. A larger fitting difference indicates a more pronounced characteristic of the received optical power change and a more abnormal received optical power.

[0075] Obtain the relationship between the received optical power at each adjacent moment and the normal preset range, wherein, 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 of the absolute values 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. Calculate the absolute value of the difference between the received optical power at the adjacent moment and the upper limit 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 of the normal preset range, and obtain the minimum of the 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.

[0076] The more obvious the fluctuation characteristics at adjacent moments are, the more obvious the variation characteristics of the received optical power are.

[0077] In an exemplary embodiment, Figure 4 As shown, a specific process of obtaining the change characteristics is given as follows:

[0078] Step S1-5-1: Obtain the variation sub-features of the received optical power at adjacent moments according to the fitting differences at adjacent moments, the fluctuation features at adjacent moments, and the distance features at adjacent moments.

[0079] For any adjacent time, the variation sub-feature of the received optical power at that adjacent time is obtained based on the fitting difference, the fluctuation feature, and the distance feature at that adjacent time. The variation sub-feature is proportional to the fitting difference and the fluctuation feature, and inversely proportional to the distance feature.

[0080] In an exemplary embodiment, a specific quantification method of the change sub-feature is given as follows:

[0081] ;

[0082] in, represents the variation sub-feature 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 time, Express Normalization, such as the sigmoid function, represents the distance feature of the i-th adjacent moment, exp represents the exponential function with the natural constant e as the base, represents the fluctuation characteristics of the ith adjacent moment. Used for Perform negative correlation normalization.

[0083] Express The normalization method here can be: Get all adjacent moments corresponding to the target moment The maximum and minimum values in the ith adjacent moment are normalized using the maximum and minimum values. Perform normalization.

[0084] Step S1-5-2: Fuse the change sub-features of all adjacent moments in the neighborhood time period to obtain the change feature of the received optical power at the target moment.

[0085] The average value of the variation sub-features of all adjacent moments in the adjacent time period of the target moment is calculated as the variation feature of the received optical power at the target moment.

[0086] Step S1-6: According to the variation characteristics of the received optical power at the target moment and the variation trend of the fitting value, the degree of representation of the fault by the received optical power at the target moment is obtained.

[0087] The more pronounced the received optical power variation characteristics at the target time, the greater the likelihood of a fault, that is, the stronger the fault indication. The greater the trend of the fitted value variation at the target time, the greater the likelihood of a fault, that is, the stronger the fault indication. Therefore, based on the received optical power variation characteristics and fitted value variation trends at the target time, the fault indication degree of the received optical power at the target time is determined. The indication degree is proportional to both the variation characteristics and the fitted value variation trends.

[0088] In one exemplary embodiment, the fitted value variation trend of the received optical power at the target time is normalized, for example, using a sigmoid function. The product of the normalized fitted value variation trend and the variation characteristic of the received optical power at the target time is used as the degree to which the received optical power at the target time reflects the fault. The above calculation logic is as follows: when the optical module to be analyzed has a stable fault, the fitted value variation trend of the received optical power will also be in a stable state. In this case, the variation characteristic of the received optical power at the target time is used to correct the normalized fitted value variation trend.

[0089] By using the above process, the degree to which the received optical power at each moment in the time sequence reflects the fault is obtained.

[0090] Step S2: According to the fluctuation of the optical attenuation degree in the neighborhood time period, the transmission loss fluctuation degree of the received optical power at the target time is obtained.

[0091] Fluctuations in received optical power are affected by a variety of factors. External changes can also cause anomalies in received optical power monitoring, making it difficult to accurately identify potential faults in the optical link. During the operation of the optical module being analyzed, the internal laser or optical attenuator can affect the transmitted optical power. For example, the laser's threshold current increases, and the luminous efficiency decreases. This causes the actual transmitted optical power to fluctuate. Due to the normal regulation of transmitted optical power, fluctuations in the received optical power of the optical module being analyzed are normal.

[0092] The optical attenuation level is determined based on the power attenuation between the optical module to be analyzed and its preceding optical module. The optical attenuation level characterizes the power attenuation between the optical module to be analyzed and its preceding optical module. It should be understood that to determine the preceding optical module to be analyzed, the transmit port of the preceding optical module is connected to the receive port of the optical module to be analyzed via an optical fiber. For any adjacent moment, the transmit optical power of the preceding optical module is obtained. The optical attenuation level at that adjacent moment is determined based on the power attenuation between the transmit optical power of the preceding optical module and the received optical power of the optical module to be analyzed.

[0093] Since the transmit 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 is, the greater the difference between the transmit optical power of the previous optical module and the received optical power of the optical module to be analyzed is. In an exemplary embodiment, the degree of optical attenuation is specifically the optical attenuation coefficient, which is calculated as follows:

[0094] ;

[0095] in, represents the optical attenuation coefficient of optical module A and optical module B at the i-th adjacent time. Optical module A is the optical module to be analyzed, optical module B is the optical module before the optical module to be analyzed, and 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 time; Indicates the transmit optical power of optical module B at the i-th adjacent time.

[0096] By the above method, the light attenuation degree at each adjacent time in the adjacent time period is obtained.

[0097] Because the fiber distance remains constant during optical module operation, the optical attenuation level should normally remain stable at all times. However, if the optical attenuation level fluctuates significantly or remains at a high level within a certain time period, this indicates an abnormality in the received optical power of the optical module being analyzed, indicating a true fault in the optical link.

[0098] In an exemplary embodiment, Figure 5 As shown, a specific process for obtaining the degree of transmission loss fluctuation is given as follows:

[0099] Step S2-1: Obtain the average value of the light attenuation within the neighborhood time period and the minimum value of the light attenuation.

[0100] The average value of the light attenuation at each adjacent time in the adjacent time period is calculated to obtain the average light attenuation value in the adjacent time period. The minimum value of the light attenuation at each adjacent time in the adjacent time period is obtained to obtain the minimum light attenuation value.

[0101] Step S2-2: Obtain a first absolute value of a difference between an average light attenuation level and a preset standard light attenuation level, and a second absolute value of a difference between an average light attenuation level and a minimum light attenuation level.

[0102] A standard optical attenuation level is preset. The preset standard optical attenuation level is a theoretical optical attenuation coefficient. The value is a known value and can be obtained from the characteristics of the optical link, specifically, during the initial connection of the optical link.

[0103] The absolute value of the difference between the average light attenuation level and the preset standard light attenuation level is calculated and defined as the first absolute value of the difference; the absolute value of the difference between the average light attenuation level and the minimum light attenuation level is calculated and defined as the second absolute value of the difference.

[0104] Step S2-3: The first absolute value of the difference and the second absolute value of the difference are combined to obtain the degree of transmission loss fluctuation.

[0105] The sum of the absolute values of the first and second differences is calculated and normalized, for example, using a sigmoid function. The normalized sum represents the transmission loss fluctuation within a certain time period. The transmission loss fluctuation reflects whether the attenuation of the received optical power of the optical module under analysis in the optical link is normal. A greater transmission loss fluctuation indicates that the attenuation within a certain time period is less normal, and thus increases the likelihood that the optical module under analysis is truly faulty.

[0106] Step S3: Based on the correlation between the performance level and the transmission loss fluctuation level within the neighborhood time period, the fault level of the optical module to be analyzed at the target time is obtained.

[0107] According to the changing correlation between the performance level and the transmission loss fluctuation level within the neighborhood time period, the fault level of the optical module to be analyzed at the target time is obtained.

[0108] 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 normal working condition, or there is a fault but the impact on the optical module to be analyzed remains stable. If there is a low correlation, it means that the performance degree is unrelated to the change in the transmission loss fluctuation degree, indicating that the change in received optical power is a normal change caused by transmission changes in other optical modules. This indicates that the optical module to be analyzed is less likely to be a real device failure and is a normal change.

[0109] In an exemplary embodiment, Figure 6 As shown, a specific process of obtaining the fault degree is given as follows:

[0110] Step S3-1: Map the performance level and transmission loss fluctuation level of each adjacent moment into a two-dimensional coordinate system and fit them to obtain a second fitting line, and determine the fitted transmission loss fluctuation level of each adjacent moment based on the second fitting line.

[0111] Because the performance level and transmission loss fluctuation level jointly represent the actual fault condition of the optical module to be analyzed, when the optical module to be analyzed is actually faulty, the performance level and transmission loss fluctuation level are relatively large. If the optical module to be analyzed is operating normally, the performance level and transmission loss fluctuation level are relatively small.

[0112] A two-dimensional coordinate system is constructed, with the performance level as the horizontal axis and the transmission loss fluctuation level as the vertical axis.

[0113] Based on the performance level and transmission loss fluctuation level at each adjacent time, the two-dimensional coordinate points at each adjacent time are obtained. These two-dimensional coordinate points are mapped to the two-dimensional coordinate system and linearly fitted to obtain a second fitted line. Based on the performance level at each adjacent time, the fitted transmission loss fluctuation level corresponding to the performance level at each adjacent time on the second fitted line is obtained.

[0114] Then, the transmission loss fluctuation degree at each adjacent moment (i.e., the actual transmission loss fluctuation degree) and the fitted transmission loss fluctuation degree can be obtained.

[0115] Step S3-2: Obtain the comprehensive difference in the transmission loss fluctuation degree at the target moment based on the difference between the fitted transmission loss fluctuation degree and the actual transmission loss fluctuation degree at each adjacent moment.

[0116] For any adjacent time, obtain the difference between the fitted transmission loss fluctuation and the actual transmission loss fluctuation at that time, specifically the absolute value of the difference. The smaller the absolute value of the difference, the smaller the difference between the fitted transmission loss fluctuation and the actual transmission loss fluctuation, and the more correlated the performance level is with the changes in the transmission loss fluctuation.

[0117] Then, the differences between the fitted transmission loss fluctuation degree and the actual transmission loss fluctuation degree at each adjacent moment are fused. The fusion method here is to calculate the average value of the differences between the fitted transmission loss fluctuation degree and the actual transmission loss fluctuation degree at each adjacent moment. The obtained average value is the comprehensive difference in the transmission loss fluctuation degree at the target moment.

[0118] Step S3-3: Obtain a correction coefficient based on the comprehensive difference in the degree of transmission loss fluctuation.

[0119] The correction coefficient for the target moment is obtained from the comprehensive difference in the degree of transmission loss fluctuation at the target moment. The correction coefficient is used to correct the performance level and transmission loss fluctuation level at the target moment. Specifically, the smaller the comprehensive difference in the degree of transmission loss fluctuation, the more it is necessary to increase the performance level and transmission loss fluctuation level at the target moment, thereby improving the accuracy of fault diagnosis. Therefore, the correction coefficient is inversely proportional to the comprehensive difference in the degree of transmission loss fluctuation. In an exemplary embodiment, the comprehensive difference in the degree of transmission loss fluctuation is negatively normalized, and the result of the negative correlation normalization is the correction coefficient. It should be understood that since the numerical range of the difference between the fitted degree of transmission loss fluctuation and the actual degree of transmission loss fluctuation at each adjacent moment is 0-1, the numerical range of the comprehensive difference in the degree of transmission loss fluctuation is also 0-1. Therefore, the negative correlation normalization method here can be: the difference between the value 1 and the comprehensive difference in the degree of transmission loss fluctuation is used as the correction coefficient.

[0120] Step S3-4: Obtain the fault degree of the optical module to be analyzed at the target time according to the performance degree and transmission loss fluctuation degree at the target time, as well as the correction coefficient.

[0121] The performance level and transmission loss fluctuation level at the target moment are combined to obtain the fault signature at that moment. In one exemplary embodiment, the average of the performance level and transmission loss fluctuation level at the target moment is calculated as the fault signature at that moment. This average is essentially a weighted sum of the performance level and transmission loss fluctuation level, with each weight being 0.5. The correction coefficient at the target moment is then multiplied by the fault signature at that moment, and the resulting product is the fault severity at that moment. This method is used to obtain the fault severity at each moment. The higher the fault severity, the more likely it is that the received optical power of the optical module being analyzed at the target moment is faulty.

[0122] In an exemplary embodiment, the DDM-based intelligent monitoring method for receiving optical module power provided in this embodiment further includes the following steps: presetting a fault severity threshold, wherein the value of the preset fault severity threshold ranges from 0 to 1, and the specific value of the preset fault severity threshold is set based on the actual situation. The preset fault severity threshold is used to determine the level of fault severity of the optical module to be analyzed at the target time, thereby determining whether the received optical power of the optical module to be analyzed at the target time is faulty. The specific value of the preset fault severity threshold is then determined based on the judgment requirements. For example, if a more stringent judgment mechanism is required, the preset fault severity threshold can be set to a smaller value. In this embodiment, 0.7 is used as an example.

[0123] The fault severity of the optical module to be analyzed at the target time is compared with a preset fault severity threshold. If the fault severity threshold is greater than or equal to the preset fault severity threshold, the received optical power of the optical module to be analyzed at the target time is determined to be faulty. Otherwise, the received optical power of the optical module to be analyzed at the target time is normal. The optical module to be analyzed is in normal working condition at the target time. Any power fluctuations at this time are considered normal.

[0124] Subsequently, the judgment result of whether the received optical power of the optical module to be analyzed at each moment is faulty can be reported in real time for subsequent diagnosis and operation and maintenance.

[0125] This embodiment also provides a DDM-based optical module receiving optical power intelligent monitoring system, 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 DDM-based optical module receiving optical power intelligent monitoring method embodiment when the program instructions are executed.

[0126] 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 DDM-based optical module received optical power intelligent monitoring method embodiment.

[0127] It should be noted that the order in which the embodiments of the present invention are described above is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0128] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

Claims

1. A DDM-based intelligent monitoring method for receiving optical power of an optical module, characterized in that: include: Based on the trend of the fitted value of the received optical power in the neighborhood time period corresponding to the target time of the optical module to be analyzed, as well as the difference between the fitted value and the actual value, combined with the relationship between the received optical power in the neighborhood time period and the normal preset range, and the fluctuation characteristics of the received optical power, the degree to which the received optical power at the target time is affected by the fault is obtained; the fluctuation characteristics characterize the abnormal fluctuation of the received optical power in the neighborhood time period; According to the fluctuation of the optical attenuation degree in 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 between the optical module to be analyzed and the previous optical module; The fault degree of the optical module to be analyzed at the target moment is obtained based on the change correlation between the performance degree and the transmission loss fluctuation degree within the neighborhood time period.

2. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 1, wherein: The process of obtaining the fluctuation characteristics includes: Based on the relationship with the normal preset range, obtaining the amount of abnormal received optical power in the neighborhood time period; Obtaining a standard deviation of received optical power within the neighborhood time period; The fluctuation characteristic is obtained according to the quantity and the standard deviation, and the fluctuation characteristic is proportional to both the quantity and the standard deviation.

3. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 1, wherein: The process of obtaining the performance level includes: A first fitting straight line is obtained by fitting the received optical power at each adjacent time, and an absolute value of the slope of the first fitting straight line is obtained as the fitting value change trend; the fitting value is a value of each adjacent time on the first fitting straight line; the adjacent time is each time within the neighborhood time period; Obtaining a variation characteristic of the received optical power at the target moment based on the fitting difference at each adjacent moment, the fluctuation characteristics at each adjacent moment, and the relationship between the received optical power at each adjacent moment and a normal preset range; the fitting difference being the difference between the fitted value and the actual value; According to the variation characteristics of the received optical power at the target moment and the variation trend of the fitting value, the degree to which the received optical power at the target moment reflects the fault is obtained.

4. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 3, wherein: The process of obtaining the relationship between the received optical power at the adjacent moments and the normal preset range includes: If the received optical power at the adjacent time is outside the normal preset range, the distance feature at the adjacent time is 0; If the received optical power at the adjacent moments is within the normal preset range, the minimum value of the absolute value of the difference between the received optical power at the adjacent moments and the two boundary values of the normal preset range is obtained as the distance feature of the adjacent moments.

5. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 4, wherein: The process of acquiring the change characteristics includes: Obtaining a variation sub-feature of the received optical power at the adjacent moments according to the fitting difference at the adjacent moments, the fluctuation feature at the adjacent moments, and the distance feature at the adjacent moments; wherein the variation sub-feature is proportional to the fitting difference and the fluctuation feature, and inversely proportional to the distance feature; The change sub-features of all adjacent moments in the neighborhood time period are fused to obtain the change feature of the received optical power at the target moment.

6. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 1, wherein: The process of obtaining the transmission loss fluctuation degree includes: Obtaining an average value of light attenuation and a minimum value of light attenuation within the neighborhood time period; Obtaining a first absolute value of a difference between the average light attenuation level and a preset standard light attenuation level, and a second absolute value of a difference between the average light attenuation level and the minimum light attenuation level; The first absolute value of the difference and the second absolute value of the difference are combined to obtain the transmission loss fluctuation degree.

7. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 1, wherein: The process of obtaining the fault degree includes: Mapping the performance degree and the transmission loss fluctuation degree at each adjacent moment into a two-dimensional coordinate system and fitting them to obtain a second fitting line, and determining the fitted transmission loss fluctuation degree at each adjacent moment based on the second fitting line; the adjacent moments are moments within the adjacent 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 at each adjacent time, the comprehensive difference of the transmission loss fluctuation degree at the target time is obtained; Obtaining a correction coefficient based on the comprehensive difference in transmission loss fluctuations, wherein the correction coefficient is inversely proportional to the comprehensive difference in transmission loss fluctuations; According to the performance level and transmission loss fluctuation level at the target time, and the correction coefficient, the fault level of the optical module to be analyzed at the target time is obtained.

8. The DDM-based intelligent monitoring method for receiving optical power of an optical module according to claim 7, wherein: 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: The correction coefficient is multiplied by the fault feature to obtain the fault degree, where the fault feature is obtained by fusing the performance degree at the target moment and the transmission loss fluctuation degree.

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

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

Images