A method and system for redundant protection of a power distribution communication network under a PON architecture

Abstract

The application discloses a kind of redundancy protection method and system of distribution communication network under PON architecture, it is related to redundancy protection technical field, the present application embodiment is by reflectivity identification shunt topological structure, and topological knot and light splitting ratio data are coupled, can acutely perceive abnormal condition caused by optical path degradation, accurately master the dynamic fluctuation trend of signal strength, to accurately identify the change of network performance.Further, by calculating terminal optical power value and the availability decline of degraded path, the severity of network failure can be quickly judged, and the terminal optical power shortage caused by network problems can be found in time.When optical path degradation occurs, the path can be quickly switched to ensure continuous communication services and effectively improve the reliability and stability of the distribution communication network under PON architecture.

Description

Technical Field

[0001] The present invention relates to the field of redundant protection technology, and in particular to a redundant protection method and system for a power distribution communication network under a PON architecture. Background Art

[0002] Passive Optical Network (PON) technology is widely used due to its efficient fiber utilization and low cost. However, in complex environments, especially in urban-rural fringe areas, optical path degradation frequently occurs, posing a threat to terminal service continuity.

[0003] Existing redundant protection methods mostly rely on static configuration and simple backup path switching. They are unable to dynamically adapt to signal strength fluctuations caused by optical path degradation, and are insufficiently responsive to changes in splitter splitting ratios. They lack real-time monitoring and correlation analysis capabilities, resulting in inefficient protection mechanisms. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a redundant protection method and system for a power distribution communication network in a PON architecture. These methods can keenly detect abnormal conditions caused by optical path degradation, accurately grasp the dynamic fluctuations in signal strength, and thus precisely identify changes in network performance. When optical path degradation occurs, they can rapidly switch paths to ensure service continuity, effectively improving the reliability and stability of the power distribution communication network in the PON architecture.

[0005] To solve the above technical problems, an embodiment of the present invention provides a redundant protection method for a power distribution communication network under a PON architecture, comprising:

[0006] Real-time monitoring of the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network, and identification of the splitter topology of the power distribution communication network based on the reflectivity;

[0007] According to the splitter topology and a preset splitting ratio data table, collecting the first signal strengths of all downstream branches of each splitter, and calculating the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength;

[0008] Calculating a first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic;

[0009] When the first optical power value is less than a preset optical power threshold, calculating a decrease in availability of the degraded path where the power distribution communication network terminal is located;

[0010] When the availability decreases by more than a preset decrease threshold, a backup path of the degraded path is activated.

[0011] As an improvement to the above solution, the real-time monitoring of the reflectivity of the optical fiber fusion splice point under the ring main unit in the power distribution communication network and the identification of the splitter topology of the power distribution communication network based on the reflectivity include:

[0012] Real-time monitoring of the reflectivity of the optical fiber splicing point under the ring main unit in the power distribution and communication network, and obtaining a reflection loss sequence based on the change of the reflectivity;

[0013] The reflection loss sequence is analyzed by fast Fourier transform, the frequency characteristics are extracted, and the dynamic distribution of the reflection loss is obtained;

[0014] identifying locations of splitters and connection relationships between splitters based on the dynamic distribution;

[0015] According to the position and connection relationship of the splitter, a splitter topology structure of the power distribution communication network is obtained.

[0016] As an improvement to the above solution, the first signal strengths of all downstream branches of each splitter are collected according to the splitter topology and a preset splitting ratio data table, and the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength are calculated, including:

[0017] According to the splitter topology, collecting the actual first signal strength of the downstream branch of each splitter;

[0018] Calculating the theoretical signal strength of the downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table;

[0019] Calculating the influence weight of each splitter on the first signal strength of its downstream branch according to the first signal strength and the theoretical signal strength;

[0020] Performing linear fitting on the influence weights to obtain a splitting ratio adjustment coefficient of the splitter;

[0021] Calculating a signal intensity change value according to the splitting ratio adjustment coefficient;

[0022] The signal strength change value is mapped to the downstream branch of the splitter to obtain an uneven distribution characteristic of the signal strength.

[0023] As an improvement to the above solution, the calculating the first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic includes:

[0024] Obtaining an optical power deviation range of the power distribution communication network terminal according to the uneven distribution characteristic of the first signal strength;

[0025] Correcting the optical power deviation range according to the splitting ratio adjustment coefficient and calculating a second optical power value of the power distribution communication network terminal;

[0026] Linear regression is performed on the second optical power values ​​at several moments to obtain the first optical power value of the power distribution communication network terminal.

[0027] As an improvement to the above solution, the optical power deviation range is corrected according to the splitting ratio adjustment coefficient to calculate the second optical power value of the power distribution communication network terminal:

[0028] Comparing the optical power deviation range with a preset deviation range threshold, determining an optical power variation trend, and calculating a preliminary optical power value of the power distribution communication network terminal;

[0029] The preliminary optical power value is corrected according to the splitting ratio adjustment coefficient to obtain a second optical power value of the power distribution communication network terminal.

[0030] As an improvement to the above solution, when the first optical power value is less than a preset optical power threshold, calculating the availability decrease of the degraded path where the power distribution communication network terminal is located includes:

[0031] When the first optical power value is less than a preset optical power threshold, calculating an initial availability decrease of the degraded path where the power distribution communication network terminal is located;

[0032] Acquiring signal data and optical link parameters of the degraded path where the power distribution communication network terminal is located; the optical link parameters include optical fiber length and connector loss;

[0033] extracting characteristic data of the degraded path according to the signal data and the optical link parameters;

[0034] The initial availability reduction range is corrected according to the characteristic data to obtain the availability reduction range of the degraded path where the power distribution communication network terminal is located.

[0035] As an improvement to the above solution, extracting characteristic data of the degraded path based on the signal data and the optical link parameters includes:

[0036] Using a support vector machine algorithm, classify the degraded paths according to the signal data and the optical link parameters to obtain degraded path types; the degraded path types differ in at least one of a degree of degradation and a cause of degradation;

[0037] According to the degraded path type, characteristic data of the degraded path is extracted; indicators of the characteristic data corresponding to different degraded path types are at least partially different.

[0038] As an improvement to the above solution, when the availability decreases by more than a preset decrease threshold, activating the backup path of the degraded path includes:

[0039] calculating a third optical power value of a power distribution communication network terminal on a backup path of the degraded path, and selecting a target backup path according to the third optical power value;

[0040] When the availability decreases by more than a preset decrease threshold, the target backup path is activated.

[0041] As an improvement to the above solution, the calculating of the third optical power value of the power distribution communication network terminal on the backup path of the degraded path, and selecting the target backup path according to the third optical power value, includes:

[0042] Acquire configuration information of a backup path of the degraded path;

[0043] Calculating, based on the configuration information, a second signal strength of a downstream branch of the splitter on the backup path to obtain a preliminary distribution result;

[0044] Calculate the third optical power value of the power distribution communication network terminal on the backup path using a weighted average method based on the preliminary distribution result;

[0045] A bandwidth requirement of the terminal service is obtained, and a target backup path is selected from the backup paths according to a matching degree between the third optical power value and the bandwidth requirement.

[0046] An embodiment of the present invention further provides a redundant protection system for a power distribution communication network under a PON architecture, comprising:

[0047] A topology identification module is used to monitor the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network in real time, and identify the splitter topology of the power distribution communication network based on the reflectivity;

[0048] a parameter correction module, configured to collect the first signal strengths of all downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table, and calculate the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength;

[0049] A first optical power value calculation module is used to calculate a first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic;

[0050] an availability reduction range calculation module, configured to calculate the availability reduction range of the degraded path where the power distribution communication network terminal is located when the first optical power value is less than a preset optical power threshold;

[0051] The redundancy protection mechanism activation module is used to activate the backup path of the degraded path when the availability decreases by more than a preset decrease threshold.

[0052] Compared with the prior art, the present invention discloses a redundant protection method and system for a power distribution communication network under a PON architecture. By real-time monitoring of the reflectivity of the optical fiber fusion point under the ring network cabinet in the power distribution communication network, the splitter topology of the power distribution communication network is identified based on the reflectivity; based on the splitter topology and a preset splitting ratio data table, the first signal strength of all downstream branches of each splitter is collected, and the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength are calculated; based on the splitting ratio adjustment coefficient and the uneven distribution characteristics, the first optical power value of the power distribution communication network terminal is calculated; when the first optical power value is less than a preset optical power threshold, the availability reduction of the degraded path where the power distribution communication network terminal is located is calculated; when the availability reduction is greater than the preset reduction threshold, the backup path of the degraded path is activated. By adopting the embodiments of the present invention, it is possible to keenly perceive abnormal conditions caused by optical path degradation, accurately grasp the dynamic fluctuation of signal strength, and thus accurately identify changes in network performance. When optical path degradation occurs, the path can be quickly switched to ensure the continuity of communication services, effectively improving the reliability and stability of the power distribution communication network under the PON architecture. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a schematic flow chart of the steps of a redundant protection method for a power distribution communication network under a PON architecture provided by an embodiment of the present invention;

[0054] Figure 2 The present invention provides a schematic diagram of a redundant protection system for a power distribution communication network under a PON architecture. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0056] In the description of the specification and claims, it should be understood that the terms "first," "second," etc., are used solely for descriptive purposes to distinguish between identical technical features and are not to be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to, nor do they necessarily describe a sequential or chronological order. The terms are interchangeable where appropriate. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of those features.

[0057] Existing technologies that rely on static configuration and simple backup path switching can mitigate the impact of single points of failure to a certain extent, but they still expose significant limitations due to the dynamic and complex nature of optical path degradation. For example, traditional evaluation mechanisms often overlook the impact of asymmetric splitter split ratios on branch signal strength and fail to fully consider the coupling between the topology and split ratio data along the path. These shortcomings lead to inaccurate optical power predictions for downstream terminals, which in turn affects the timing and effectiveness of redundant path activation.

[0058] Based on the above considerations, an embodiment of the present invention provides a redundant protection method for a power distribution communication network under a PON architecture. Figure 1 In this embodiment, the redundant protection method of the power distribution communication network under the PON architecture is specifically performed through steps S1 to S5:

[0059] S1. Real-time monitoring of the reflectivity of the optical fiber fusion splicing point under the ring main unit in the power distribution communication network, and identification of the splitter topology of the power distribution communication network according to the reflectivity.

[0060] In the embodiment of the present invention, by monitoring the reflectivity and identifying the splitter topology, it is helpful to manage the network more finely and improve the efficiency of network troubleshooting and optimization.

[0061] S2. According to the splitter topology and a preset splitting ratio data table, collect the first signal strengths of all downstream branches of each splitter, and calculate the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strengths.

[0062] It should be noted that the redundant protection method for the power distribution communication network under the PON architecture proposed in the embodiment of the present invention innovatively couples the splitter topology structure and splitting ratio data, thereby improving the accuracy of the optical power measurement of the downstream terminal, and helping to build a redundant path activation mechanism that can dynamically associate the topology along the way and adjust the downstream optical power prediction model.

[0063] S3. Calculate a first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the unbalanced distribution characteristic.

[0064] Accurately calculating the terminal optical power value can promptly detect insufficient terminal optical power caused by network problems, take measures to make adjustments in advance, ensure the stability and reliability of terminal communications, and avoid communication failures caused by abnormal optical power.

[0065] S4. When the first optical power value is less than a preset optical power threshold, calculate the availability decrease of the degraded path where the power distribution communication network terminal is located.

[0066] Timely understanding of the decline in availability of degraded paths can quickly determine the severity of network failures, helping network maintenance personnel to rationally allocate resources, prioritize degraded paths that have a greater impact on communication services, and ensure the overall service quality of the distribution communication network.

[0067] S5. When the availability decreases by more than a preset decrease threshold, activate a backup path of the degraded path.

[0068] If the availability of a degraded path drops significantly, it indicates that the path may not be able to properly support communication services. Activating the backup path can quickly switch communication services to the backup line, maintaining communication continuity.

[0069] In this solution, by identifying splitter topology through reflectivity and coupling the topology with splitting ratio data, it can keenly detect abnormal conditions caused by optical path degradation, accurately grasp the dynamic fluctuations of signal strength, and thus accurately identify changes in network performance. By calculating the performance of backup paths based on the splitting ratio adjustment coefficient and the uneven distribution characteristics, it is possible to quickly switch paths when optical path degradation occurs, ensuring communication service continuity and effectively improving the reliability and stability of the power distribution communication network under the PON architecture.

[0070] As a preferred embodiment, step S1, real-time monitoring of the reflectivity of the optical fiber fusion splice point under the ring main unit in the power distribution communication network, and identifying the splitter topology of the power distribution communication network based on the reflectivity, includes:

[0071] Real-time monitoring of the reflectivity of the optical fiber splicing point under the ring main unit in the power distribution and communication network, and obtaining a reflection loss sequence based on the change of the reflectivity;

[0072] The reflection loss sequence is analyzed by fast Fourier transform, the frequency characteristics are extracted, and the dynamic distribution of the reflection loss is obtained;

[0073] identifying locations of splitters and connection relationships between splitters based on the dynamic distribution;

[0074] According to the position and connection relationship of the splitter, a splitter topology structure of the power distribution communication network is obtained.

[0075] It's important to note that, assuming periodic fluctuations in the return loss sequence, a fast Fourier transform (FFT) can reveal a dominant frequency peak, which likely corresponds to periodic reflections from a splitter within the fiber. Extracting frequency signatures helps reveal the dynamic distribution of return loss, providing a more intuitive understanding than directly observing the raw data. Fast Fourier transform analysis significantly improves the ability to identify periodic interference. Identifying splitter locations based on the peak positions in the dynamic distribution is crucial for determining network topology.

[0076] In some preferred embodiments, identifying the positions of the splitters and the connection relationships between the splitters according to the dynamic distribution includes:

[0077] identifying a position of a splitter according to a peak position of the dynamic distribution;

[0078] The connection relationship of the splitters is obtained according to the distances between adjacent peaks.

[0079] For example, if reflection loss values ​​are collected every 1 second for 10 minutes on a 10-kilometer optical fiber line, a sequence of 600 data points can be generated. Reflection loss values, typically measured in decibels, reflect the optical signal loss at the splice point. This generation of time-series data provides fundamental information on dynamic changes for subsequent analysis. Using a fast Fourier transform to analyze time-series data converts time-domain signals into the frequency domain, extracts frequency features, and generates a dynamic distribution map.

[0080] If the dynamic distribution graph shows peaks at 2 km, 5 km, and 8 km, we can infer the presence of splitters at these locations. It's understandable that the 3 km interval between 2 km and 5 km likely represents an independent fiber connection. Mapping the network structure through physical distance provides a basis for subsequent calculations.

[0081] As a preferred embodiment, step S2, based on the splitter topology and a preset splitting ratio data table, collecting the first signal strength of all downstream branches of each splitter, and calculating the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength, includes:

[0082] According to the splitter topology, collecting the actual first signal strength of the downstream branch of each splitter;

[0083] Calculating the theoretical signal strength of the downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table;

[0084] Calculating the influence weight of each splitter on the first signal strength of its downstream branch according to the first signal strength and the theoretical signal strength;

[0085] Performing linear fitting on the influence weights to obtain a splitting ratio adjustment coefficient of the splitter;

[0086] Calculating a signal intensity change value according to the splitting ratio adjustment coefficient;

[0087] The signal strength change value is mapped to the downstream branch of the splitter to obtain an uneven distribution characteristic of the signal strength.

[0088] For example, in a ring main unit (RMU) environment in a suburban area, a fiber optic line might be split into eight branches using a 1:8 splitter. The splitting ratio table shows that each branch theoretically receives equal signal strength. However, due to environmental interference or splice point loss, the actual strength may vary. Assuming an adjustment factor of 1.2, the signal strength change can be estimated by multiplying the original strength by this factor to reflect the actual attenuation.

[0089] As can be seen, adjusting the splitting ratio coefficient can achieve a more balanced signal strength distribution, reducing signal unevenness in the network and improving transmission efficiency. It can also extend the service life of the fiber optic network and reduce maintenance costs, offering significant technical advantages.

[0090] To illustrate this, consider a preferred embodiment. Consider a splitter with a 1:4 splitting ratio. Theoretically, the downstream signal strength is reduced to 25%. If the measured signal strength attenuation exceeds expectations, for example, by 20%, the splitter's impact weight might be 1.2, exceeding the preset weight threshold of 1.1. This weighting calculation reflects the deviation between actual loss and theoretical values, helping to identify potential issues.

[0091] In some preferred embodiments, when the influence weight exceeds a preset weight threshold, the influence weights of multiple groups of splitter data are collected, and then the influence weights of the multiple groups of splitter data are fitted using linear regression to obtain the splitting ratio adjustment coefficient of the splitter.

[0092] For example, the influence weights of the multiple groups of splitter data are 1.2, 1.15, and 1.3, respectively, corresponding to splitting ratios of 1:4, 1:8, and 1:16, and the splitting ratio adjustment coefficient after fitting is 1.05. The splitting ratio adjustment coefficient reflects the trend of the splitting ratio change.

[0093] Furthermore, in some embodiments, the splitting ratio adjustment coefficient is repeatedly iterated based on the dynamic distribution. For example, if the dynamic distribution shows a high peak value for a particular splitter, the coefficient is adjusted to 1.08, and after repeated verification, the final value is determined to be 1.07. This iterative process ensures that the adjustment coefficient is consistent with the actual network status, resulting in better optimization results. Using the splitting ratio adjustment coefficient to update the splitting ratio data table allows for accurate splitter configuration parameters.

[0094] As a preferred embodiment, step S3, calculating the first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic, includes:

[0095] Obtaining an optical power deviation range of the power distribution communication network terminal according to the uneven distribution characteristic of the first signal strength;

[0096] Correcting the optical power deviation range according to the splitting ratio adjustment coefficient and calculating a second optical power value of the power distribution communication network terminal;

[0097] Linear regression is performed on the second optical power values ​​at several moments to obtain the first optical power value of the power distribution communication network terminal.

[0098] It should be noted that when the distribution of the first signal strength is asymmetric, it may be due to differences in fiber length or connection loss. Such imbalance may affect the deviation range of the optical power. Preferably, the source of the asymmetry can be determined by comparing the theoretical distribution with the actual distribution, such as aging of the terminal equipment or bending of the line.

[0099] Furthermore, preferably, the optical power deviation range is corrected according to the splitting ratio adjustment coefficient to calculate the second optical power value of the power distribution communication network terminal:

[0100] Comparing the optical power deviation range with a preset deviation range threshold, determining an optical power variation trend, and calculating a preliminary optical power value of the power distribution communication network terminal;

[0101] The preliminary optical power value is corrected according to the splitting ratio adjustment coefficient to obtain a second optical power value of the power distribution communication network terminal.

[0102] For example, the measured power of a branch is -27dBm, the theoretical value is -22dBm, and the deviation is 5dBm. By checking the reflection loss of the fusion point or the consistency of the splitter port, it is determined that the deviation range is ±3dBm to ±6dBm. In the embodiment of the present invention, the preset deviation range threshold is selected as ±4dBm. When the deviation exceeds the threshold, the optical power value may continue to decrease. Before combining the splitting ratio adjustment coefficient, the calculated initial optical power value is -28dBm. After correction according to the splitting ratio adjustment coefficient, the second optical power value obtained by measurement is -26.5dBm. It can initially reduce the error.

[0103] Based on five measurements within a week (-25dBm, -25.5dBm, -26dBm, -26.5dBm, and -26.5dBm), regression analysis determined the first optical power value to be -27dBm, avoiding accidental interference from a single data point. The splitting ratio adjustment coefficient was used to verify consistency for this first optical power value, resulting in the optimized terminal optical power result. Based on the predicted value of -27dBm, the theoretical value inferred from the splitting ratio adjustment coefficient of 1.2 should be -22.5dBm. This deviation from the actual measurement is within an acceptable range, confirming the validity of the result.

[0104] As a preferred implementation manner, step S4, when the first optical power value is less than a preset optical power threshold, calculating the availability decrease of the degraded path where the power distribution communication network terminal is located, includes:

[0105] When the first optical power value is less than a preset optical power threshold, calculating an initial availability decrease of the degraded path where the power distribution communication network terminal is located;

[0106] Acquiring signal data and optical link parameters of the degraded path where the power distribution communication network terminal is located; the optical link parameters include optical fiber length and connector loss;

[0107] extracting characteristic data of the degraded path according to the signal data and the optical link parameters;

[0108] The initial availability reduction range is corrected according to the characteristic data to obtain the availability reduction range of the degraded path where the power distribution communication network terminal is located.

[0109] It should be noted that path degradation has a cumulative impact on optical path availability. That is, the more severe the path degradation and the longer it lasts, the greater the decrease in optical path availability. This embodiment of the present invention uses characteristic data to correct the initial decrease in availability, which can be closer to the actual degradation situation.

[0110] Furthermore, preferably, the extracting characteristic data of the degraded path based on the signal data and the optical link parameters includes:

[0111] Using a support vector machine algorithm, classify the degraded paths according to the signal data and the optical link parameters to obtain degraded path types; the degraded path types differ in at least one of a degree of degradation and a cause of degradation;

[0112] According to the degraded path type, characteristic data of the degraded path is extracted; indicators of the characteristic data corresponding to different degraded path types are at least partially different.

[0113] In some preferred embodiments, the characteristic data includes attenuation rate and jitter frequency.

[0114] It should be noted that the support vector machine algorithm can be used to classify signal attenuation margin and link stability indicators to determine the type of degraded path. Preferably, if the attenuation margin is less than 4dB and the stability indicator decreases by more than 30%, it can be classified as a "severely degraded path." If the attenuation margin is between 4-6dB and the stability decreases by 10%, it is classified as a "mildly degraded path."

[0115] For example, an optical path is judged to be severely degraded due to long-term exposure to a humid environment, with its attenuation margin reduced to 3.5dB and its stability decreased by 35%.

[0116] In some preferred embodiments, the changing trends of attenuation rate and jitter frequency are obtained through a pre-trained path degradation assessment model. For example, the signal attenuation margin drops from the initial 8dB to 5dB, and the link stability index decreases by 20% due to increased jitter. The key influencing factors may be fiber connector contamination or a too small bending radius. Specifically, connector contamination may introduce an additional 1dB loss, while insufficient bending radius may result in 0.5dB attenuation. Analyzing these trends helps to locate the root cause of the problem and improve troubleshooting efficiency. Furthermore, the verified degraded path types can be obtained as training data for the path degradation assessment model to improve model accuracy.

[0117] As a preferred implementation manner, step S5, activating the backup path of the degraded path when the availability decreases by more than a preset decrease threshold, includes:

[0118] calculating a third optical power value of a power distribution communication network terminal on a backup path of the degraded path, and selecting a target backup path according to the third optical power value;

[0119] When the availability decreases by more than a preset decrease threshold, the target backup path is activated.

[0120] It should be noted that, for a path, several backup paths can be formed through the different opening and closing states of redundant nodes. When screening the target backup path, all backup paths can be analyzed to obtain the optimal target backup path, or the backup paths can be analyzed in a preset order. Once the backup path that meets the requirements is obtained through analysis, it will be used as the target backup path. The preset order is no different from the conventional means known to those skilled in the art. It can be sorted according to the number of redundant nodes that need to be adjusted, can be determined according to the complexity of the route adjustment, or can be determined by other economic attributes. The specific settings do not affect the beneficial effects produced by the present invention.

[0121] It should also be noted that in some preferred embodiments, the extent of availability decline in the future can be calculated. For example, based on the attenuation data of the past six months, it is calculated that the availability may drop to 85% in three months, so as to obtain the corresponding extent of availability decline three months later. The calculation of the extent of availability decline relies on multi-dimensional feature analysis, which enhances foresight. The prediction results can also reveal potential patterns of long-term degradation. In a more preferred embodiment, the degradation weight can be adjusted when updating the path degradation assessment model parameters based on the prediction results. Assuming that the initial model has a weight of 0.3 for joint loss, it can be increased to 0.4 after the prediction shows that its impact is greater. The optimized optical path availability parameters, such as adjusting from 90% to 88%, can better reflect the actual status. This parameter optimization improves the adaptability of the model and helps to intervene in degradation problems in advance.

[0122] Furthermore, preferably, the calculating of a third optical power value of the power distribution communication network terminal on the backup path of the degraded path, and selecting a target backup path according to the third optical power value, includes:

[0123] Acquire configuration information of a backup path of the degraded path;

[0124] Calculating, based on the configuration information, a second signal strength of a downstream branch of the splitter on the backup path to obtain a preliminary distribution result;

[0125] Calculate the third optical power value of the power distribution communication network terminal on the backup path using a weighted average method based on the preliminary distribution result;

[0126] A bandwidth requirement of the terminal service is obtained, and a target backup path is selected from the backup paths according to a matching degree between the third optical power value and the bandwidth requirement.

[0127] In some preferred embodiments, the configuration information includes a path number, start and end point information, and bandwidth capacity. The system extracts the configuration information of the backup path, such as an optical fiber length of 50 kilometers and an attenuation coefficient of 0.2 dB / km, to preliminarily determine its transmission capacity.

[0128] Preferably, when calculating the preliminary distribution result, an analysis can be performed based on the input power and path characteristics of the optical signal. For example, assuming that the input power is 10 dBm, after 50 kilometers of transmission, the signal strength will be weakened due to attenuation. When using the weighted average method to calculate the terminal optical power, the loss weights of different sections in the path may be comprehensively considered, for example, the weight of the first 30 kilometers accounts for 60% and the weight of the last 20 kilometers accounts for 40%, so as to obtain a more balanced optical power estimate, such as 4 dBm. If the estimated value is lower than the preset standard, such as 5 dBm, it indicates that the performance of the backup path is not sufficient to replace the main path.

[0129] In some preferred embodiments, the preliminary distribution results can be adjusted by increasing amplifier gain or optimizing fiber connection point loss. Preferably, after adjustment, the distribution data is recalculated to increase the terminal optical power to 6 dBm. When calculating transmission loss based on the optimized distribution data, the difference between input and output power can be used to determine the transmission loss. For example, if the input is 10 dBm and the output is 6 dBm, the loss is 4 dB. If the tolerance is 3 dB, then this path does not meet the activation criteria.

[0130] It's important to note that understanding the bandwidth requirements of terminal services helps clarify the relationship between service demand and resource allocation. In a fiber-optic power distribution communication network, downstream terminals may include multiple user nodes, each carrying a different service type, such as video streaming, high-speed data transmission, or voice communication. By analyzing this service data, it's possible to extract characteristics of bandwidth requirements. For example, video streaming may require a sustained 50 Mbps bandwidth, while voice communication only requires 1 Mbps. For example, if a terminal is running both video and data services, the total bandwidth requirement can be accumulated to 60 Mbps. This analysis relies on real-time traffic data, typically performed by network monitoring equipment.

[0131] In this approach, the initial distribution results are used to determine the transmission loss of the backup path, thereby determining whether the backup path meets the activation conditions. If the transmission loss exceeds the tolerance range, the configuration information of the next backup path is obtained and the signal strength distribution is recalculated to obtain a new optical power estimate.

[0132] In some cases, the third optical power values ​​of the power distribution communication network terminals under multiple backup paths are similar, and the redundant protection method of the power distribution communication network under the PON architecture further includes:

[0133] When the difference between the third optical power values ​​of the power distribution communication network terminals under multiple backup paths is less than a preset target threshold, extracting the link characteristics of the backup paths and obtaining the historical failure rates of the backup paths;

[0134] Calculating a signal attenuation coefficient based on the link characteristics to obtain a strength distribution matrix between nodes of the backup path;

[0135] Calculating the optical power loss value between each node according to the intensity distribution matrix;

[0136] A target backup path is selected from the backup paths according to the optical power loss value and the historical failure rate.

[0137] It's important to note that acquiring link characteristic data is a fundamental step in path analysis and typically involves collecting physical layer parameters. For example, optical time-domain reflectometry can be used to collect information such as the fiber length and attenuation values ​​of each segment in the link. For example, a 50-kilometer fiber link might measure an attenuation of 0.2 dB per kilometer, for a total attenuation of 10 dB.

[0138] It is understandable that signal attenuation is closely related to medium properties. In some preferred embodiments, the link contains multiple nodes, and each section of optical fiber is made of different materials, and the attenuation coefficient can be calculated separately. For example, nodes A to B use G.652 optical fiber with an attenuation coefficient of 0.2 dB / km, while B to C use G.655 optical fiber with a coefficient of 0.25 dB / km. This segmented calculation can more accurately reflect the path characteristics and help optimize resource allocation. When using the signal attenuation coefficient to generate the intensity distribution matrix between path nodes. Specifically, the link can be divided into multiple intervals, and the signal strength changes in each interval are recorded.

[0139] As a preferred embodiment, when the availability decreases by more than a preset decrease threshold, after activating the backup path of the degraded path, the redundant protection method for the power distribution communication network under the PON architecture further includes:

[0140] Calculating an optimization parameter of the splitting ratio according to the optical path loss before and after activating the backup path of the degraded path;

[0141] Optimizing the splitting ratio using the optimization parameters and calculating the optimized optical path availability parameters;

[0142] According to the optical path availability parameter, the loss variation trend is analyzed, and the switching frequency of the degraded path and the target backup path is calculated.

[0143] It should be noted that when analyzing the loss change trend, real-time monitoring data is needed. In some preferred embodiments, loss data collected by sensors in the optical fiber network is obtained to analyze its patterns. For example, on an optical fiber path, the monitoring equipment records the loss value once a minute. Data for 7 consecutive days shows that the loss gradually increases from 2dB to 5dB, showing a linear growth trend. This trend can be used to determine the characteristic distribution of the degraded path. The characteristic distribution may be manifested as the loss growth rate or fluctuation amplitude. Assuming that the loss growth rate of a certain path is stable at 0.05dB / hour, it can be used as the basis for initial degradation judgment. This method helps to identify potential problem paths in advance. The switching frequency parameter is extracted from the characteristic distribution of the degraded path.

[0144] Furthermore, the switching frequency can be defined by counting the number of times the loss exceeds a certain threshold per unit time. For example, if the loss of a certain path exceeds 4dB three times a day, the switching frequency can be set to 3 times / day. When judging the activation conditions of the redundant path. In an embodiment of the present invention, the switching frequency threshold can be flexibly adjusted according to business needs. Assuming that the maximum number of interruptions allowed for the business is 2 times / day, the threshold is set to 2 times / day. This threshold setting can effectively avoid the waste of resources caused by frequent switching while ensuring business continuity. The business continuity guarantee coefficient is calculated based on the switching frequency threshold.

[0145] The redundant protection method for a power distribution communication network under a PON architecture, provided by an embodiment of the present invention, uses reflectivity to identify splitter topology and couples the topology with splitting ratio data. This method can keenly detect abnormal conditions caused by optical path degradation, accurately grasp the dynamic fluctuations of signal strength, and thus precisely identify changes in network performance. The performance of the backup path is calculated based on the splitting ratio adjustment coefficient and the uneven distribution characteristics. When optical path degradation occurs, the path can be quickly switched to ensure communication service continuity, effectively improving the reliability and stability of the power distribution communication network under the PON architecture.

[0146] The embodiment of the present invention provides a redundant protection system for a power distribution communication network under a PON architecture. Figure 2 The redundant protection system of the power distribution communication network under the PON architecture includes a topology structure identification module 11, a parameter correction module 12, a first optical power value calculation module 13, an availability degradation calculation module 14 and a redundant protection mechanism activation module 15, wherein:

[0147] A topology identification module 11 is used to monitor the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network in real time, and identify the splitter topology of the power distribution communication network according to the reflectivity;

[0148] a parameter correction module 12 for collecting the first signal strengths of all downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table, and calculating the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength;

[0149] A first optical power value calculation module 13 is configured to calculate a first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic;

[0150] an availability reduction range calculation module 14, configured to calculate the availability reduction range of the degraded path where the power distribution communication network terminal is located when the first optical power value is less than a preset optical power threshold;

[0151] The redundancy protection mechanism activation module 15 is configured to activate a backup path of the degraded path when the availability decreases by more than a preset decrease threshold.

[0152] As a preferred embodiment, the topology structure identification module 11 includes:

[0153] A reflection loss sequence generating unit is used to monitor the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network in real time, and obtain a reflection loss sequence according to the change of the reflectivity;

[0154] A frequency feature extraction unit, configured to analyze the reflection loss sequence using a fast Fourier transform, extract frequency features, and obtain a dynamic distribution of the reflection loss;

[0155] A splitter identification unit, configured to identify the position of the splitter and the connection relationship between the splitters according to the dynamic distribution;

[0156] The splitter topology structure generating unit is configured to obtain the splitter topology structure of the power distribution communication network according to the position and the connection relationship of the splitter.

[0157] As a preferred embodiment, the parameter correction module 12 includes:

[0158] A first signal strength collection unit is configured to collect actual first signal strengths of downstream branches of each splitter according to the splitter topology;

[0159] a theoretical signal strength calculation unit, configured to calculate the theoretical signal strength of the downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table;

[0160] an influence weight calculation unit, configured to calculate an influence weight of each splitter on the first signal strength of its downstream branch based on the first signal strength and the theoretical signal strength;

[0161] A splitting ratio adjustment coefficient calculation unit, configured to perform linear fitting on the influence weight to obtain a splitting ratio adjustment coefficient of the splitter;

[0162] a signal strength change value calculation unit, configured to calculate the signal strength change value according to the splitting ratio adjustment coefficient;

[0163] The imbalance distribution characteristic calculation unit is used to map the signal strength change value to the downstream branch of the splitter to obtain the imbalance distribution characteristic of the signal strength.

[0164] As a preferred implementation, the first optical power value calculation module 13 includes:

[0165] an optical power deviation range calculation unit, configured to obtain an optical power deviation range of a terminal in the power distribution communication network according to the uneven distribution characteristic of the first signal strength;

[0166] an optical power value correction unit, configured to correct the optical power deviation range according to the splitting ratio adjustment coefficient and calculate a second optical power value of the power distribution communication network terminal;

[0167] The linear regression unit is used to perform linear regression on the second optical power values ​​at several moments to obtain the first optical power value of the power distribution communication network terminal.

[0168] Furthermore, preferably, the optical power value correction unit is specifically configured to:

[0169] Comparing the optical power deviation range with a preset deviation range threshold, determining an optical power variation trend, and calculating a preliminary optical power value of the power distribution communication network terminal;

[0170] The preliminary optical power value is corrected according to the splitting ratio adjustment coefficient to obtain a second optical power value of the power distribution communication network terminal.

[0171] As a preferred implementation, the availability reduction range calculation module 14 is specifically configured to:

[0172] an initial availability decrease amplitude calculation unit, configured to calculate an initial availability decrease amplitude of the degraded path where the power distribution communication network terminal is located when the first optical power value is less than a preset optical power threshold;

[0173] A data acquisition unit, configured to acquire signal data and optical link parameters of the degraded path where the power distribution communication network terminal is located; the optical link parameters include optical fiber length and connector loss;

[0174] a characteristic data extraction unit, configured to extract characteristic data of the degraded path based on the signal data and the optical link parameters;

[0175] The availability reduction correction unit is configured to correct the initial availability reduction according to the characteristic data to obtain the availability reduction of the degraded path where the power distribution communication network terminal is located.

[0176] Furthermore, preferably, the feature data extraction unit is specifically used to:

[0177] Using a support vector machine algorithm, classify the degraded paths according to the signal data and the optical link parameters to obtain degraded path types; the degraded path types differ in at least one of a degree of degradation and a cause of degradation;

[0178] According to the degraded path type, characteristic data of the degraded path is extracted; indicators of the characteristic data corresponding to different degraded path types are at least partially different.

[0179] As a preferred implementation, the redundant protection mechanism activation module 15 includes:

[0180] a target backup path screening unit, configured to calculate a third optical power value of the power distribution communication network terminal on a backup path of the degraded path, and screen a target backup path according to the third optical power value;

[0181] The redundancy activation unit is configured to activate the target backup path when the availability decreases by more than a preset decrease threshold.

[0182] Furthermore, preferably, the target backup path screening unit is specifically configured to:

[0183] Acquire configuration information of a backup path of the degraded path;

[0184] Calculating, based on the configuration information, a second signal strength of a downstream branch of the splitter on the backup path to obtain a preliminary distribution result;

[0185] Calculate the third optical power value of the power distribution communication network terminal on the backup path using a weighted average method based on the preliminary distribution result;

[0186] A bandwidth requirement of the terminal service is obtained, and a target backup path is selected from the backup paths according to a matching degree between the third optical power value and the bandwidth requirement.

[0187] A redundant protection system for a power distribution communication network under a PON architecture, provided by an embodiment of the present invention, identifies splitter topology through reflectivity and couples the topology with splitting ratio data. This system can keenly detect abnormal conditions caused by optical path degradation, accurately grasp the dynamic fluctuations of signal strength, and thus precisely identify changes in network performance. The performance of backup paths is calculated based on the splitting ratio adjustment coefficient and the uneven distribution characteristics. This system enables rapid path switching when optical path degradation occurs, ensuring communication service continuity and effectively improving the reliability and stability of the power distribution communication network under the PON architecture.

[0188] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0189] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A redundant protection method for a power distribution communication network under a PON architecture, characterized in that: include: Real-time monitoring of the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network, and identification of the splitter topology of the power distribution communication network based on the reflectivity; According to the splitter topology and a preset splitting ratio data table, collecting the first signal strengths of all downstream branches of each splitter, and calculating the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength; Calculating a first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic; When the first optical power value is less than a preset optical power threshold, calculating a decrease in availability of the degraded path where the power distribution communication network terminal is located; When the availability decreases by more than a preset decrease threshold, activating a backup path of the degraded path; The real-time monitoring of the reflectivity of the optical fiber fusion splice point under the ring main unit in the power distribution communication network and identifying the splitter topology of the power distribution communication network according to the reflectivity includes: Real-time monitoring of the reflectivity of the optical fiber splicing point under the ring main unit in the power distribution and communication network, and obtaining a reflection loss sequence based on the change of the reflectivity; The reflection loss sequence is analyzed by fast Fourier transform, the frequency characteristics are extracted, and the dynamic distribution of the reflection loss is obtained; identifying locations of splitters and connection relationships between splitters based on the dynamic distribution; According to the position and connection relationship of the splitter, a splitter topology structure of the power distribution communication network is obtained.

2. The redundant protection method for a power distribution communication network under a PON architecture according to claim 1, characterized in that: The method of collecting the first signal strengths of all downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table, and calculating the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength includes: According to the splitter topology, collecting the actual first signal strength of the downstream branch of each splitter; Calculating the theoretical signal strength of the downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table; Calculating the influence weight of each splitter on the first signal strength of its downstream branch according to the first signal strength and the theoretical signal strength; Performing linear fitting on the influence weights to obtain a splitting ratio adjustment coefficient of the splitter; Calculating a signal intensity change value according to the splitting ratio adjustment coefficient; The signal strength change value is mapped to the downstream branch of the splitter to obtain an uneven distribution characteristic of the signal strength.

3. The redundant protection method for a power distribution communication network under a PON architecture according to claim 1, characterized in that: Calculating the first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic includes: Obtaining an optical power deviation range of the power distribution communication network terminal according to the uneven distribution characteristic of the first signal strength; Correcting the optical power deviation range according to the splitting ratio adjustment coefficient and calculating a second optical power value of the power distribution communication network terminal; Linear regression is performed on the second optical power values ​​at several moments to obtain the first optical power value of the power distribution communication network terminal.

4. The redundant protection method for a power distribution communication network under a PON architecture according to claim 3, characterized in that: The optical power deviation range is corrected according to the splitting ratio adjustment coefficient, and the second optical power value of the power distribution communication network terminal is calculated: Comparing the optical power deviation range with a preset deviation range threshold, determining an optical power variation trend, and calculating a preliminary optical power value of the power distribution communication network terminal; The preliminary optical power value is corrected according to the splitting ratio adjustment coefficient to obtain a second optical power value of the power distribution communication network terminal.

5. The redundant protection method for a power distribution communication network under a PON architecture according to claim 1, characterized in that: When the first optical power value is less than a preset optical power threshold, calculating the availability decrease of the degraded path where the power distribution communication network terminal is located includes: When the first optical power value is less than a preset optical power threshold, calculating an initial availability decrease of the degraded path where the power distribution communication network terminal is located; Acquiring signal data and optical link parameters of the degraded path where the power distribution communication network terminal is located; the optical link parameters include optical fiber length and connector loss; extracting characteristic data of the degraded path according to the signal data and the optical link parameters; The initial availability reduction range is corrected according to the characteristic data to obtain the availability reduction range of the degraded path where the power distribution communication network terminal is located.

6. The redundant protection method for a power distribution communication network under a PON architecture according to claim 5, characterized in that: The extracting characteristic data of the degraded path according to the signal data and the optical link parameters includes: Using a support vector machine algorithm, classify the degraded paths according to the signal data and the optical link parameters to obtain degraded path types; the degraded path types differ in at least one of a degree of degradation and a cause of degradation; According to the degraded path type, characteristic data of the degraded path is extracted; indicators of the characteristic data corresponding to different degraded path types are at least partially different.

7. The redundant protection method for a power distribution communication network under a PON architecture according to claim 1, characterized in that: When the availability decreases by more than a preset decrease threshold, activating the backup path of the degraded path includes: calculating a third optical power value of a power distribution communication network terminal on a backup path of the degraded path, and selecting a target backup path according to the third optical power value; When the availability decreases by more than a preset decrease threshold, the target backup path is activated.

8. The redundant protection method for a power distribution communication network under a PON architecture according to claim 7, characterized in that: The calculating of the third optical power value of the power distribution communication network terminal on the backup path of the degraded path, and selecting the target backup path according to the third optical power value, includes: Acquire configuration information of a backup path of the degraded path; Calculating, based on the configuration information, a second signal strength of a downstream branch of the splitter on the backup path to obtain a preliminary distribution result; Calculate the third optical power value of the power distribution communication network terminal on the backup path using a weighted average method based on the preliminary distribution result; A bandwidth requirement of the terminal service is obtained, and a target backup path is selected from the backup paths according to a matching degree between the third optical power value and the bandwidth requirement.

9. A redundant protection system for a power distribution communication network under a PON architecture, characterized in that: include: A topology identification module is used to monitor the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network in real time, and identify the splitter topology of the power distribution communication network based on the reflectivity; a parameter correction module, configured to collect the first signal strengths of all downstream branches of each splitter according to the splitter topology and a preset splitting ratio data table, and calculate the splitting ratio adjustment coefficient of the splitter and the uneven distribution characteristics of the first signal strength; A first optical power value calculation module is used to calculate a first optical power value of the power distribution communication network terminal according to the splitting ratio adjustment coefficient and the uneven distribution characteristic; an availability reduction range calculation module, configured to calculate the availability reduction range of the degraded path where the power distribution communication network terminal is located when the first optical power value is less than a preset optical power threshold; a redundancy protection mechanism activation module, configured to activate a backup path of the degraded path when the availability decreases by more than a preset decrease threshold; The topology structure identification module includes: A reflection loss sequence generating unit is used to monitor the reflectivity of the optical fiber fusion point under the ring main unit in the power distribution communication network in real time, and obtain a reflection loss sequence according to the change of the reflectivity; A frequency feature extraction unit, configured to analyze the reflection loss sequence using a fast Fourier transform, extract frequency features, and obtain a dynamic distribution of the reflection loss; A splitter identification unit, configured to identify the position of the splitter and the connection relationship between the splitters according to the dynamic distribution; The splitter topology structure generating unit is configured to obtain the splitter topology structure of the power distribution communication network according to the position and the connection relationship of the splitter.

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