A method for evaluating path differentiation of service channels of a power communication backbone transmission network

Abstract

The application discloses a power communication backbone transmission network service channel path differentiation evaluation method, and the content comprises the following steps: extracting path information of service main and standby channels, defining path sets of communication equipment and optical cables; establishing a similarity matrix between main and standby path set elements; calculating the similarity of main and standby channel paths by using set cosine similarity; using the similarity to represent the path differentiation degree; analyzing and calculating multiple power communication backbone transmission network services, sorting the path similarity in ascending order, and realizing service channel path differentiation evaluation. The application helps power communication management and operation personnel to accurately identify the rationality of service channel configuration, timely adjust the service channel with small path differentiation, reduce the operation risk of power communication services, and ensure the high reliability of key communication services.

Description

Technical Field

[0001] This invention relates to the field of power communication technology, specifically to a method for evaluating the path differentiation of service channels in power communication backbone transmission networks. Background Technology

[0002] The power communication backbone transmission network carries important communication services for the production, operation, and management of various power systems. To ensure the safe, reliable, and stable operation of the power grid, critical power communication services such as line relay protection and safety and stability control require the configuration of both primary and backup channels, and these channels must meet the "dual power supply, dual equipment, dual routing" principle. "Dual power supply" can be guaranteed in the power system design of the communication station, while "dual equipment, dual routing" manifests in the differences in the configuration paths of the primary and backup channels. However, in engineering projects, the focus is often on whether the configuration of critical service channels follows the "dual power supply, dual equipment, dual routing" principle, while a quantitative assessment of the degree of difference in the existing network service channel paths is lacking.

[0003] Currently, in evaluating the path differentiation of service channels in power communication backbone transmission networks, there is no method to generate similarity between path set elements based on the geographical information of communication equipment and optical cables, and to calculate path similarity using soft-based set cosine similarity, thereby achieving a quantitative evaluation of path differentiation. This method helps power communication management and operation personnel accurately identify the rationality of service channel configurations, make timely adjustments to service channels with small path differentiation, further reduce the operational risks of power communication services, and ensure the high reliability of critical communication services. Summary of the Invention

[0004] The purpose of this invention is to provide a method for evaluating the path differentiation of service channels in power communication backbone transmission networks, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for evaluating the path differentiation of service channels in a power communication backbone transmission network includes the following steps:

[0007] S1: Extract the path information of the primary and backup channels for the service, and define the path set of power communication transmission network equipment and optical cables;

[0008] S2: Establish a similarity matrix among the elements of the primary and backup path sets; use set cosine similarity to calculate the similarity between the primary and backup path sets, and use the similarity to represent the degree of path differentiation;

[0009] S3: Analyze and calculate multiple power communication backbone transmission network services, sort the path similarity in ascending order, and realize the differentiated evaluation of service channel paths.

[0010] Furthermore, the service types of the power communication backbone transmission network in S1 include: line relay protection, safety and stability control, dispatch data network and dispatch program control; the extracted path information of the primary and backup channels of the services is expressed in text format, with the format: source node - optical cable 1 - intermediate node 1 - optical cable 2 - ... - optical cable n - destination node. The text expression of the path is converted into a set form. Along the path information expressed in text, from the source node to the destination node, all communication equipment nodes and optical cables are uniformly numbered, and the number is used as an element to form a path set.

[0011] Let the set of primary channel paths be defined as A, where A = {a1, a2, ..., a...} |A|}; where a1 and a |A| These represent the source and destination nodes of the primary channel path, respectively; a2 and other elements a i Even-numbered elements of i represent optical cables, while odd-numbered elements represent equipment. Similarly, the set of backup channel paths is defined as B, where B = {b1, b2, ..., b}. |B|}, where b1 and b |B| These represent the source and destination nodes of the backup channel path, respectively; b2 and other elements b i Even-numbered values ​​of i represent optical cables, while odd-numbered elements represent equipment.

[0012] Furthermore, the similarity matrix between the elements of the primary and backup path sets in S2 includes:

[0013] Let communication device E a The geographic coordinates are (x a ,y a Equipment E a The coverage area is (x a ,y a ) is the center, r e A circle with radius ΔE has an area of ​​ΔE. a Similarly, optical cable F a The coverage area is based on fiber optic cable F a With the topological shape as the center, it expands outwards by r f The area of ​​the region obtained by the distance is ΔF. a Let p and q be any two sets of paths, which can belong to the same set or to different sets. Define the similarity between p and q as:

[0014]

[0015] Where, Δ p and Δ q Δ represents the area covered by elements p and q, respectively; p∩qLet Δ be the overlapping area of ​​the regions covered by elements p and q. When the regions covered by elements p and q do not overlap, Δ p∩q =0, S(p,q)=0; when the coverage of elements p and q is exactly the same and completely overlaps, S(p,q)=1. Therefore, S(p,q) satisfies the condition: 0≤S(p,q)≤1. Obviously, the similarity between elements of different types is 0.

[0016] Define a similarity matrix D = {d} between the elements of the primary and backup path sets. ij} N×N Where N = |A| + |B|, d ij =S(p i ,p j ),p i ,p j ∈(A∪B), i,j=1,2,...,N;

[0017] The similarity matrix D between elements of the path set is formed by arranging the elements of sets A and B in order, and then using the similarity between each pair of elements as matrix elements.

[0018] Furthermore, the geographical coverage area includes:

[0019] In the scenario of a power communication transmission backbone network service channel, each element in the primary and backup channel path sets A and B corresponds to a communication device and optical cable segment in the actual network. These communication devices and optical cable segments are distributed in different geographical locations, and the optical cable ends also have different topological shapes. By accurately locating the geographical coordinates of the communication devices and measuring the physical direction of the optical cable segments, the coordinate position and coverage area of ​​each element in the path set are determined. Furthermore, the coverage area Δ of the two elements is calculated. p and Δ q and overlapping area Δ p∩q Finally, the similarity S(p,q) between the two elements is calculated.

[0020] Furthermore, in S2, the similarity between the primary and backup channel paths is calculated using set cosine similarity, including:

[0021] First, based on the similarity matrix D between the elements of the path set, calculate the soft basis |A| of set A. S The soft basis of set B is |B|. S And the soft basis |A∪B| of set (A∪B) S Then, compute the soft basis |A∩B| of the set (A∩B). S The soft foundation of set A is:

[0022] The soft foundation of set B is:

[0023] The soft basis of set (A∪B) is:

[0024] The soft basis of set (A∩B) is: |A∩B| S =|A| S +|B| S -|A∪B| S

[0025] The cosine similarity between sets A and B based on soft foundations is:

[0026]

[0027] The cosine similarity S between sets A and B P (A,B) satisfy: 0≤S P (A,B)≤1;

[0028] Using the cosine similarity S between sets A and B P (A,B) represents the path differentiation of the service channel in the backbone transmission network of power communication; S P The larger (A,B) is, the smaller the difference between the primary channel path and the backup channel path; S P The smaller (A,B) is, the greater the difference between the two paths.

[0029] Furthermore, the specific method in S3 includes: taking M power communication backbone transmission network services as evaluation objects, each service having two channels, primary and backup, and channel path information represented by sets A and B respectively; calculating the similarity between each element in sets A and B for each path based on the geographical location information of the communication equipment and optical cables included in the path and the physical topology, and constructing a similarity matrix; for the M power communication backbone transmission network services, calculating the cosine similarity of sets A and B based on soft foundation, and obtaining the differentiated quantitative results of the primary and backup channel paths of the services;

[0030] For the M power communication backbone transmission network services being evaluated, their path similarity is sorted in ascending order. The sorting result is the evaluation result of the service channel path differentiation. The services ranked higher have strong differentiation and can better meet the service configuration requirements; the services ranked lower have weak differentiation and cannot better meet the service configuration requirements of the primary and backup channel paths.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] This invention provides a method for evaluating the path differentiation of service channels in a power communication backbone transmission network. By extracting communication equipment and optical cable path information of primary and backup service channels in the power communication backbone transmission network, primary and backup path sets can be defined separately. Then, based on the geographical information of the communication equipment and optical cables, the similarity between elements within or between path sets is calculated, and a similarity matrix between elements of the primary and backup path sets is established. Next, the similarity between primary and backup channel paths is calculated using soft-based set cosine similarity, and the similarity is used to represent the degree of path differentiation. Finally, the path similarity calculation results of multiple power communication backbone transmission network services are ranked to achieve a differentiated evaluation of service channel paths. This method helps power communication management and operation personnel accurately identify the rationality of service channel configurations, make timely adjustments to service channels with small path differences, further reduce the operational risks of power communication services, and ensure the high reliability of critical communication services. Attached Figure Description

[0033] Figure 1 This is an overall flowchart of the method of the present invention;

[0034] Figure 2 This is a schematic diagram illustrating the principle of element similarity calculation in the method of this invention.

[0035] Figure 3 This is a flowchart of the path similarity calculation method in this invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The basic idea of ​​this invention is to extract communication equipment and optical cable path information of the primary and backup channels of the power communication backbone transmission network to define a path set; then, based on the geographical information of the communication equipment and optical cables, calculate the similarity between elements within or between path sets, and establish a similarity matrix between path set elements; next, calculate the similarity of the primary and backup channel paths using a soft-based set cosine similarity measure, and use this similarity to represent the degree of path differentiation; finally, by ranking the path similarity calculation results, the differentiation evaluation of multiple power communication backbone transmission network service channels can be achieved. This method helps power communication management and operation personnel accurately identify the rationality of service channel configuration, make timely adjustments to service channels with small path differences, further reduce the operational risks of power communication services, and ensure the high reliability of critical communication services.

[0038] like Figure 1 As shown, based on the above concept, this embodiment of the invention provides a method for evaluating the path differentiation of service channels in a power communication backbone transmission network, including the following steps:

[0039] S1: Extract the path information of the primary and backup channels for the service, and define the path set of power communication transmission network equipment and optical cables;

[0040] The power communication backbone transmission network services in this embodiment of the invention are divided into several service types, including line relay protection, safety and stability control, dispatch data network, and dispatch program control. Among them, line relay protection and safety and stability control are key services for power system production and operation, and adopt a primary and backup dual-channel configuration, requiring sufficient differentiation between channel paths.

[0041] The extracted path information of the primary and backup channels for critical business operations includes communication equipment and optical cables. It is usually expressed in text form, and its format is often "source node-optical cable 1-intermediate node 1-optical cable 2-...-optical cable n-destination node", where the nodes represent communication equipment.

[0042] This invention converts text-formatted path information into a path set. Based on the text-formatted path information, all communication devices (nodes) and optical cables are uniformly numbered from the "source node" to the "destination node," and these numbers are used as elements of the path set.

[0043] Define the primary channel path set A = {a1, a2, ..., a...} |A| Define the set of backup channel paths B = {b1, b2, ..., b}. |B|}

[0044] S2: Establish a similarity matrix among the elements of the primary and backup path sets; use set cosine similarity to calculate the similarity between the primary and backup path sets, and use the similarity to represent the degree of path differentiation;

[0045] S3: Analyze and calculate multiple power communication backbone transmission network services, sort the path similarity in ascending order, and realize the differentiated evaluation of service channel paths.

[0046] In the aforementioned S1, the service types of the power communication backbone transmission network include various service types such as line relay protection, safety and stability control, dispatch data network, and dispatch program control. Among them, line relay protection and safety and stability control are key services for power system production and operation, requiring a primary and backup dual-channel configuration and meeting the "three-double" principle of "dual power supply, dual equipment, and dual routing." This invention maps the degree of compliance with the "three-double" principle to channel path differentiation. The extracted path information of the primary and backup channels is usually expressed in text form, with a format often of "source node - optical cable 1 - intermediate node 1 - optical cable 2 - ... - optical cable n - destination node." This invention converts the text format of the path information into a set format. Based on the path information in the text format, from "source node" to "destination node," all communication equipment (nodes) and optical cables are uniformly numbered, and the number is used as an element of the path set.

[0047] Define the primary channel path set A = {a1, a2, ..., a...} |A|}; where a1 and a |A| These represent the source and destination nodes of the primary channel path, respectively; a2 and other elements a i Even-numbered elements of i represent optical cables, and odd-numbered elements represent equipment; define the set of backup channel paths B = {b1, b2, ..., b...} |B|}, where b1 and b |B| These represent the source and destination nodes of the backup channel path, respectively; b2 and other elements b i Even-numbered values ​​of i represent optical cables, while odd-numbered elements represent equipment.

[0048] The similarity matrix between the elements of the primary and backup path sets in S2 above includes: calculating the similarity between the elements of the primary and backup path sets based on the geographical coverage area; in the scenario of power communication transmission backbone network service channels, each element in the primary and backup channel path sets A and B corresponds to the actual network communication equipment and optical cable segments. The communication equipment and optical cable segments are distributed in different geographical locations, and the optical cable ends also have different topological shapes. This invention utilizes a geographic information system to accurately locate the geographical coordinates of the communication equipment, measure the physical direction of the optical cable segments, determine the coordinate position and coverage of each element in the path set, and further calculate the coverage area and overlap area of ​​the two elements.

[0049] Let communication device E a The geographic coordinates are (x a ,y a Equipment E a The coverage area is based on (x a ,y a ) is the center, r e A circle with radius ΔE has an area of ​​ΔE. a Similarly, optical cable Fa The coverage area is based on fiber optic cable F a With the topological shape as the center, it expands outwards by r f The area of ​​the region obtained by the distance is ΔF. a .

[0050] Let p and q be any two sets of paths, which can belong to the same set or to different sets. Define the similarity between p and q as:

[0051]

[0052] Where, Δ p and Δ q Δ represents the area covered by elements p and q, respectively; p∩q Let Δ be the overlapping area of ​​the regions covered by elements p and q. When the regions covered by elements p and q do not overlap, Δ... p∩q =0, S(p,q) = 0; when elements p and q have completely identical and overlapping coverage areas, S(p,q) = 1. Therefore, S(p,q) satisfies the condition: 0 ≤ S(p,q) ≤ 1. Obviously, the similarity between different types of elements is 0. For example, the similarity between communication equipment and optical fiber is 0, i.e., S(p,q) = 0. First, calculate the coverage area Δ of elements p and q. p and Δ q Then, calculate the overlapping area Δ of p and q. p∩q Finally, the similarity S(p,q) between p and q is calculated.

[0053] Define a similarity matrix D = {d} between the elements of the primary and backup path sets. ij} N×N Where N = |A| + |B|, d ij =S(p i ,p j ),p i ,p j ∈(A∪B), i,j=1,2,...,N.

[0054] The similarity matrix D between elements of the path set is formed by arranging the elements of sets A and B in order, and then using the similarity between each pair of elements as matrix elements.

[0055] In S2 above, the similarity between the primary and backup channel paths is calculated using set cosine similarity, including:

[0056] First, based on the similarity matrix D between the elements of the path set, calculate the soft cardinality |A| of set A. S The soft basis of set B is |B|. S And the soft basis |A∪B| of set (A∪B) SThen, compute the soft basis |A∩B| of the set (A∩B). S The calculation formulas for each item are as follows:

[0057] (1) The soft foundation of set A is

[0058]

[0059] (2) The soft foundation of set B is

[0060]

[0061] (3) The soft basis of set (A∪B) is

[0062]

[0063] (4) The soft basis of set (A∩B) is

[0064] |A∩B| S =|A| S +|B| S -|A∪B| S

[0065] (5) The cosine similarity between sets A and B based on soft foundation is:

[0066]

[0067] The cosine similarity S between sets A and B P (A,B) satisfy: 0≤S P (A,B)≤1;

[0068] Using the cosine similarity S between sets A and B P (A, B) represents the degree of path differentiation in the service channels of the power communication backbone transmission network; S P (A,B) is the quantitative indicator of path differentiation; S P The larger (A,B) is, the smaller the difference between the primary and backup channel paths; conversely, the smaller (A,B) is, the greater the difference between the paths.

[0069] The specific method in S3 above includes: Assuming M power communication backbone transmission network services are used as evaluation objects. To ensure service reliability, each service has two channels, primary and backup, with channel path information represented by sets A and B, respectively. Based on the geographical location information and physical topology of the communication equipment and optical cables included in the path, this invention calculates the similarity between each element in sets A and B for each path, forming a similarity matrix. For the M power communication backbone transmission network services, the cosine similarity of sets A and B based on a soft foundation is calculated to obtain the differentiated quantitative results of the primary and backup channel paths. For the M power communication backbone transmission network services being evaluated, their path similarity is sorted in ascending order. The sorting result is the differentiated evaluation result of the service channel paths. Services ranked higher have stronger differences and can better meet service configuration requirements; services ranked lower have weaker differences and cannot better meet the service configuration requirements of the primary and backup channel paths.

[0070] like Figure 2 As shown, the principle of element similarity calculation in this embodiment of the invention includes the following:

[0071] Figure 2 (a) The principle of calculating the element similarity of communication devices is given. Let the coordinates of communication devices p and q be (x, q, q, x ... p ,y p ) and (x q ,y q The radii of the circular coverage areas are r. p and r q Based on geometric principles, the coverage area Δ of the communication device p can be calculated. p The coverage area Δ of communication equipment q q and overlapping area Δ p∩q According to the formula S(p,q)=Δ p∩q / (Δ p +Δ q -Δ p∩q The similarity between communication device elements p and q is calculated.

[0072] Figure 2 (b) The principle of similarity calculation for optical cable elements is given; let the coordinates of optical cable p be (x... p1 ,y p2 ), (x p2 ,y p2 ) and (x p3 ,y p3 The coverage radius is r. p Let the coordinates of the optical cable q be (x, y, q) respectively. q1 ,y q2 ), (x q2 ,y q2) and (x q3 ,y q3 The coverage radius is r. q Based on geometric principles, the coverage area Δ of the optical cable p can be calculated. p The coverage area Δ of optical cable q q and overlapping area Δ p∩q According to the formula S(p,q)=Δ p∩q / (Δ p +Δ q -Δ p∩q The similarity between optical cable elements p and q is calculated. If the overlap area Δ of p and q is... p∩q If p and q are different types of elements, then S(p,q) = 0; if p and q belong to different types of elements, such as communication equipment and optical cable, then S(p,q) = 0.

[0073] like Figure 3 As shown, to further explain and better illustrate the present invention, its path similarity calculation includes the following:

[0074] S2.1: Parameter Initialization. Key parameters include: the number of services being evaluated M, and the expansion radius r of element p. p And the radius of expansion r of element q q In this embodiment, M = 10, and the expansion radius r of the communication device element is... p (or r) q =4m, the expansion radius r of the optical cable element p (or r) q ) = 5m;

[0075] S2.2: Extract business path information. The business path information extracted in this embodiment includes:

[0076] Service 1 (C1) is a 2M multiplexing protection service, and its main paths include: source station equipment E a (1,1), Destination station equipment E a (1,2), 49km power fiber optic cable F a (1,1); its backup path includes: source station equipment E b (1,1), Destination station equipment E b (1,7) There are 5 intermediate devices and 6 intermediate optical cables.

[0077] Service 2 (C2) is a dedicated fiber optic protection service, whose main path includes: 6.5km power fiber optic cable F. a (2,1); its backup route includes: 6.5km power fiber optic cable F b (2,1). The primary and backup paths are deployed on two parallel optical cables.

[0078] Service 3 (C3) is a 2M multiplexing protection service, and its main paths include: source station equipment E a (3,1), Destination station equipment E a (3,2), 96km power optical cable F a (3,1); its backup path includes: source station equipment E b (3,1), Destination station equipment E b (3,9) There are 7 intermediate devices and 8 intermediate optical cables.

[0079] Service 4 (C4) is a 2M multiplexing protection service, and its main paths include: source station equipment E a (4,1), Destination station equipment E a (4,2), 43km power fiber optic cable F a (4,1); its backup path includes: source station equipment E b (4,1), Destination station equipment E b (4,4) There are 2 intermediate devices and 3 intermediate optical cables.

[0080] Service 5 (C5) is a 2M multiplexing protection service, and its main paths include: source station equipment E a (5,1), Destination station equipment E a (5,2), 102km power optical cable F a (5,1); its backup path includes: source station equipment E b (5,1), Destination station equipment E b (5,4) There are 2 intermediate devices and 3 intermediate optical cables.

[0081] Service 6 (C6) is a dedicated fiber optic protection service, whose main routes include: 38km power fiber optic cable F. a (6,1); its backup route includes: 38km power fiber optic cable F b (6,1). The primary and backup paths are deployed on two parallel optical cables.

[0082] Service 7 (C7) is a 2M multiplexing protection service, and its main paths include: source station equipment E a (7,1), Destination station equipment E a (7,2), 104km power fiber optic cable F a (7,1); its backup path includes: source station equipment E b (7,1), Destination station equipment E b (7,2), 104km power fiber optic cable F b (7,1). The primary and backup paths are deployed on two parallel optical cables.

[0083] Service 8 (C8) is a 2M multiplexing protection service, and its main paths include: source station equipment Ea (8,1), Destination station equipment E a (8,2), 14km power fiber optic cable F a (8,1); its backup path includes: source station equipment E b (8,1), Destination station equipment E b (8,4) There are 2 intermediate devices and 3 intermediate optical cables.

[0084] Service 9 (C9) is a dedicated fiber optic protection service, and its main routes include: 30km power fiber optic cable F. a (9,1); its backup route includes: 30km power fiber optic cable F b (9,1). The primary and backup paths are deployed on two parallel optical cables.

[0085] Service 10 (C10) is a dedicated fiber optic protection service, whose main path includes: 19km power fiber optic cable F a (10,1); its backup route includes: 19km power fiber optic cable F b (10,1). The primary and backup paths are deployed on two parallel optical cables.

[0086] S2.3: Define path sets A and B. In this embodiment, path sets A and B are defined based on business path information. The content includes:

[0087] C1: A(1)={a1,a2,a3}, B(1)={b1,b2,...,b 13};

[0088] C2: A(2)={a1}, B(2)={b1};

[0089] C3: A(3)={a1,a2,a3}, B(3)={b1,b2,...,b 17};

[0090] C4: A(4)={a1,a2,a3}, B(4)={b1,b2,...,b7};

[0091] C5: A(5)={a1,a2,a3}, B(5)={b1,b2,...,b7};

[0092] C6: A(6)={a1}, B(6)={b1};

[0093] C7: A(7)={a1,a2,a3}, B(7)={b1,b2,b3};

[0094] C8: A(8)={a1,a2,a3}, B(8)={b1,b2,...,b7};

[0095] C9: A(9)={a1}, B(9)={b1};

[0096] C10: A(10)={a1}, B(10)={b1}.

[0097] S2.4: Calculate the element similarity S(p,q), based on... Figure 2 The principle of calculating S(p,q) is explained, using business C1 and C2 as examples to illustrate the calculation process of element similarity S(p,q). The content is as follows:

[0098] Service C1's primary path source station device E a (1,1) and backup source equipment E b (1,1) Deployed in the same data center. Based on the equipment location and expansion radius, the calculated similarity S(a1,b1) = 0.15; Primary and backup destination station equipment E a (1,2) and E b (1,7) are deployed in the same data center. The similarity S(a3,b) is calculated based on the device location and the radius of expansion. 13 = 0.25. The similarity of all other elements in the path sets A(1) and B(1) for business C1 is 0. Therefore, the similarity matrix between the elements of the primary and backup path sets for business C1 is...

[0099]

[0100] The similarity matrix D is a sparse matrix of (16×16).

[0101] Service C2 is a dedicated fiber optic protection service. The primary and backup paths consist only of optical cables, without communication equipment, and the two optical cables are deployed in parallel, resulting in overlapping coverage areas. Based on the geographical distribution parameters and extension radius of the optical cables, the calculated similarity S(a1,b1) = 0.05. The similarity matrix between the elements of the primary and backup path sets for Service C2 is as follows:

[0102]

[0103] The similarity matrix D is a small (2×2) matrix.

[0104] The method for calculating the similarity matrix between elements of the primary and backup path sets for other businesses can be deduced similarly.

[0105] S2.5: Calculate path similarity S P (A,B), in this embodiment, the path similarity S is calculated based on the similarity matrix D between the elements of the primary and backup path sets. P (A,B), such as Figure 3 As shown. The calculations for business operations C1 and C2 are as follows:

[0106] From the similarity matrix D between the elements of the primary and backup path sets for business C1, we can obtain |A| S =1+1+1=3, |B| S =1 + 1 + ... + 1 = 13, |A∩B| S =3 + 13 - 15.34 = 0.66. Path similarity. This is the cosine similarity of sets A and B based on a soft foundation.

[0107] From the similarity matrix D between the elements of the primary and backup path sets of business C2, we can obtain |A| S =1, |B| S =1, |A∩B| S =1 + 1 - 1.905 = 0.095. Path similarity. Other business path similarity S P The calculation method for (A,B) follows the same principle.

[0108] S2.6: Business Path Similarity S P (A,B) sorting. The business path similarity vector in this embodiment is S={0.1058,0.0952,0.0925,0.1442,0.1442,0.0952,0.2520,0.1442,0.0952,0.0952}.

[0109] Sort vector S in ascending order, and we get

[0110] S'={0.0925,0.0952,0.0952,0.0952,0.0952,0.1058,0.1442,0.1442,0.1442,0.2520}.

[0111] S2.7: Evaluation of Business Path Differentiation. In the sorted business path similarity vector S', the first element at the top corresponds to the business with the greatest difference between the primary and backup paths; the last element corresponds to the business with the smallest difference between the primary and backup paths.

[0112] In this embodiment, some services have the same degree of differentiation. To address this, this embodiment considers the length of the primary optical cable path. Services with shorter optical cable lengths exhibit greater path differentiation; services with longer optical cable lengths exhibit less path differentiation. The comprehensive ranking result of service channel path differentiation is: C3 f C2 f C10 f C9 f C6 f C1 f C8 f C4f C5 f C7.

[0113] In summary, this invention provides a method for evaluating the path differentiation of service channels in a power communication backbone transmission network. By extracting communication equipment and optical cable path information of primary and backup service channels in the power communication backbone transmission network, primary and backup path sets can be defined separately. Then, based on the geographical information of the communication equipment and optical cables, the similarity between elements within or between path sets is calculated, and a similarity matrix between elements of the primary and backup path sets is established. Next, using soft-based set cosine similarity, the similarity between primary and backup channel paths is calculated, and the similarity is used to represent the degree of path differentiation. Finally, the path similarity calculation results of multiple power communication backbone transmission network services are ranked to achieve a differentiated evaluation of service channel paths. This method helps power communication management and operation personnel accurately identify the rationality of service channel configurations, make timely adjustments to service channels with small path differences, further reduce the operational risks of power communication services, and ensure the high reliability of critical communication services.

[0114] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for evaluating the path differentiation of service channels in a power communication backbone transmission network, characterized in that, Includes the following steps: S1: Extract the path information of the primary and backup service channels, and define the path set of power communication transmission network equipment and optical cables; among which, the service types of the power communication backbone transmission network include: line relay protection, security and stability control, dispatch data network, and dispatch program control; the extracted path information of the primary and backup service channels is expressed in text format, with the following format: source node - optical cable 1 - intermediate node 1 - optical cable 2 - ... - optical cable n - Destination node: Convert the textual representation of the path into a set. Along the path information expressed in the text, from the source node to the destination node, assign a unified number to all communication device nodes and optical cables, and use the number as an element to form a path set. Let the set of primary channel paths be defined as follows: A， ； in, and These represent the source and destination nodes of the primary channel path, respectively. Other elements , Even-numbered elements represent optical cables, and odd-numbered elements represent equipment. Similarly, the set of backup channel paths is defined as follows: B , ,in, and These represent the source and destination nodes of the backup channel path, respectively. Other elements , Even-numbered elements represent optical cables, while odd-numbered elements represent equipment. S2: Establish a similarity matrix among the elements of the primary and backup path sets; use set cosine similarity to calculate the similarity between the primary and backup path sets, and use the similarity to represent the degree of path differentiation; Specifically, establishing a similarity matrix among the elements of the primary and backup path sets includes: Set up communication equipment The geographic coordinates are ,equipment The coverage area is Center of the circle A circle with radius has an area of ​​. Similarly, optical cables The coverage area is based on optical fiber. Expanding outwards from the center of the topological shape The area of ​​the region obtained by the distance is . ;set up and Let be any two sets of paths, which can belong to the same set or to different sets, defined as follows: and The similarity is: ； in, and elements respectively and The area covered; For elements and The overlapping area of ​​the coverage, when the element and When the coverage areas do not overlap, =0, =0; when element and When the coverage areas are exactly the same and completely overlap =1, therefore, Conditions met: Clearly, the similarity between elements of different types is 0. Define a similarity matrix between elements of the primary and backup path sets. ,in , , ; Similarity matrix between path set elements It is a set and The elements are arranged in order, and then the similarity between each pair of elements is used as the matrix elements; Using set cosine similarity, the similarity between primary and backup channel paths is calculated as follows: First, based on the similarity matrix between the elements of the path set... Calculate the set soft base ,gather The soft base is and set soft base Then, calculate the set. soft base ;gather The soft base is: ; gather The soft base is: ; gather The soft base is: ; gather The soft base is: ; Based on soft foundation and The cosine similarity of sets is: ； and Set cosine similarity satisfy: ; use and Set cosine similarity This indicates the differentiation of service channel paths in the backbone transmission network of power communications; The larger the value, the smaller the difference between the primary channel path and the backup channel path; The smaller the value, the greater the difference between the two paths; S3: Analyze and calculate multiple power communication backbone transmission network services, sort the path similarity in ascending order, and realize the differentiated evaluation of service channel paths.

2. The method for evaluating the path differentiation of service channels in a power communication backbone transmission network as described in claim 1, characterized in that, The area covered includes: In the scenario of power communication transmission backbone network service channels, the set of primary and backup channel paths and Each element in the algorithm corresponds to a communication device and fiber optic cable segment in the actual network. These devices and segments are distributed in different geographical locations, and the fiber optic cable ends also have different topological shapes. By accurately locating the geographical coordinates of the communication devices and measuring the physical direction of the fiber optic cable segments, the coordinates and coverage of each element in the path set are determined. Furthermore, the coverage area of ​​the two elements is calculated. and and overlapping area Finally, the similarity between the two elements is calculated. .

3. The method for evaluating the path differentiation of service channels in a power communication backbone transmission network as described in claim 1, characterized in that, The specific methods in S3 include: Let... M The evaluation object is a power communication backbone transmission network service. Each service has two channels, primary and backup. The channel path information is represented by sets. and This means that, based on the geographical location information of the communication equipment and optical cables included in the path, as well as the physical topology, a set is calculated for each path. and The similarity between each element is calculated, and a similarity matrix is ​​constructed; for M A power communication backbone transmission network service, computed based on software foundation. and By combining cosine similarity, we obtain the differential quantification results of the primary and backup channel paths of the business; Regarding the evaluated M The path similarity of the power communication backbone transmission network services is sorted in ascending order. The sorting result is the evaluation result of the service channel path differentiation. The services ranked higher have strong differentiation and can better meet the service configuration requirements; the services ranked lower have weak differentiation and cannot better meet the service configuration requirements of the primary and backup channel paths.

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