WO2022095657A1 - 基于分组传送网ptn的接入层设备成环优化方法及系统 - Google Patents

基于分组传送网ptn的接入层设备成环优化方法及系统 Download PDF

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Publication number
WO2022095657A1
WO2022095657A1 PCT/CN2021/122566 CN2021122566W WO2022095657A1 WO 2022095657 A1 WO2022095657 A1 WO 2022095657A1 CN 2021122566 W CN2021122566 W CN 2021122566W WO 2022095657 A1 WO2022095657 A1 WO 2022095657A1
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Prior art keywords
network element
long chain
optical fiber
network
cross
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PCT/CN2021/122566
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English (en)
French (fr)
Inventor
徐爱波
魏明
金从元
余晗
汪俊芳
王春枝
官沙
刘爱军
刘锦航
严灵毓
Original Assignee
武汉烽火技术服务有限公司
湖北工业大学
烽火通信科技股份有限公司
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Priority to EP21888354.4A priority Critical patent/EP4113865A4/en
Publication of WO2022095657A1 publication Critical patent/WO2022095657A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H04B10/275—Ring-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
    • H04L41/0836—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability to enhance reliability, e.g. reduce downtime
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/14—Network analysis or design
    • H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/22—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks comprising specially adapted graphical user interfaces [GUI]

Definitions

  • the present invention relates to the field of packet transmission network optimization, in particular to a method and system for loop optimization of access layer equipment based on packet transmission network PTN.
  • the bearer network is a private network constructed by various operators to bear various voice and data services, usually using optical fibers as the transmission medium.
  • PTN networking is introduced into the bearer network, and the existing PTN adopts a three-layer network structure, including an access layer, an aggregation layer, and a core layer.
  • a device forms a loop or not has a huge impact on network stability.
  • a device that does not form a loop may affect a large number of mobile services when a single-point line or equipment failure occurs. Making the network into a loop as much as possible has become an important operation to improve network security.
  • the purpose of the present invention is to provide a method and system for optimizing the loop formation of the access layer equipment based on the packet transport network PTN, so as to improve the loop formation rate of the access layer equipment and improve the network security.
  • the present invention provides the following scheme:
  • a method for optimizing loop formation of access layer equipment based on packet transport network PTN comprising:
  • the network resource information includes the information of the PTN network element, the information of the link where the non-ring network element is located, and the information of the ring where the long chain is located;
  • the PTN network element information includes the network element parameters, service usage classification and the network element evaluation result, the network element evaluation result shows whether each network element forms a ring;
  • the information on the link where the non-ring network element is located includes the link parameters and the link evaluation result, and the link evaluation result shows Whether each link is a long chain;
  • the information of the loop where the long chain is located includes loop parameters and a loop evaluation result, and the loop evaluation result shows whether each loop is a giant loop;
  • the i-th long chain For the i-th long chain, according to the network resource information of the PTN networking, it is determined whether there is a relationship between each network element on the i-th long chain and each network element on the ring where the i-th long chain is located. with fiber optic connection;
  • each optical fiber When the gain of each optical fiber is a non-positive value, or when there is no optical fiber between all network elements of the i-th long chain and all network elements of the loop where the i-th long chain is located, the adding an optical fiber between the network element of the i-th long chain and the network element of the loop where the i-th long chain is located;
  • the services passing through the i-th long-chain first network element and the second network element are switched;
  • the first network element is the network element connected to the added optical fiber, and the second network element is the network element connected to the added optical fiber.
  • the network element is the next-hop network element that the first network element performs service transmission in the direction of the cross network element;
  • the cross network element is the cross position of the loop where the i-th long chain and the i-th long chain are located the network element;
  • the network element parameters include network element level, network element name, network element type and network element IP;
  • the link parameters include link ID, link node and link node number;
  • the loop parameter Including ring ID, ring node, number of ring nodes, and ring master rate.
  • adding an optical fiber between the network element of the i-th long chain and the network element of the ring where the i-th long chain is located specifically including:
  • the lowermost network element of the i-th long chain When the lowermost network element of the i-th long chain has a port corresponding to the fiber rate between the cross-connect element and the network element preceding the cross-connect element, the lowermost network element of the i-th long chain Add optical fiber between the network element and the previous network element of the crossover network element;
  • the lowermost network element of the i-th long chain When the lowermost network element of the i-th long chain has a port corresponding to the optical fiber rate between the cross-connect element and the network element following the cross-connect element, the lowermost network element of the i-th long chain Add optical fiber between the network element and the next network element of the crossover network element;
  • the lowermost network element of the i-th long chain does not have a port corresponding to the fiber rate between the cross-connect element and the network element following the cross-connect element
  • the lowermost network element of the i-th long chain A port corresponding to the optical fiber rate between the cross-connect element and the next network element of the cross-connect element is added to the network element, and the port is between the lowest network element of the i-th long chain and the next network element of the cross-connect element. add fiber in between;
  • the switching of the services passing through the i-th long-chain first network element and the second network element according to the added optical fiber specifically includes:
  • the service passing through the optical fiber between the first network element and the second network element is switched to the added optical fiber.
  • Optical fiber services are switched, including:
  • the third network element corresponding to the optical fiber with the largest gain;
  • the third network element is the network element connected to the optical fiber with the largest gain on the i-th long chain;
  • the fourth network element is the service transmission of the third network element to the cross network element direction.
  • the next hop network element is the service transmission of the third network element to the cross network element direction.
  • the present invention also provides an access layer equipment loop optimization system based on the packet transport network PTN, including:
  • the network resource information acquisition module is used to acquire the network resource information of the PTN networking;
  • the network resource information includes the information of the PTN network element, the information of the link where the non-ring network element is located, and the information of the ring where the long chain is located;
  • the PTN network element information Including network element parameters, service usage classification and network element evaluation results, the network element evaluation results show whether each network element forms a ring;
  • the information on the links where the non-ring network elements are located includes link parameters and link evaluation results,
  • the link evaluation result shows whether each link is a long chain;
  • the information of the loop where the long chain is located includes the loop parameters and the loop evaluation result, and the loop evaluation result shows whether each loop is a giant chain. ring;
  • the optical fiber judgment module is used for the ith long chain, according to the network resource information of the PTN networking, to judge each network element on the ith long chain and each network element on the ring where the ith long chain is located. Whether there is an optical fiber connection between a network element;
  • the optical fiber gain calculation module is used to calculate the optical fiber when there is an optical fiber between the m-th network element on the i-th long chain and the n-th network element on the loop where the i-th long chain is located. gain g mn ;
  • the optical fiber adding module is used when the gain of each optical fiber is a non-positive value, or when all the network elements of the i-th long chain are connected to all the network elements of the loop where the i-th long chain is located When there is no optical fiber, add optical fiber between the network element of the i-th long chain and the network element of the ring where the i-th long chain is located;
  • a first service switching module configured to switch the services passing through the i-th long-chain first network element and the second network element according to the added optical fiber; the first network element is connected to the added optical fiber
  • the second network element is the next-hop network element that the first network element performs service transmission in the direction of the cross network element;
  • the cross network element is the i-th long chain and the i-th long chain The network element at the intersection of the loop where the long chain is located;
  • the second service switching module is configured to, when the gains of all optical fibers are not all non-positive values, according to the gain of each optical fiber, for the i-th long chain and the network elements in the loop where the i-th long chain is located Switch between optical fiber services;
  • the ring-forming optimization module is used to sequentially switch the services of each long chain and the optical fibers between the network elements in the ring where the long chain is located, so as to complete the ring-forming optimization of the access layer equipment in the PTN networking.
  • the optical fiber addition module specifically includes:
  • the lowermost network element and the previous network element obtaining unit used to obtain the lowermost network element of the i-th long chain and the previous network element of the cross network element;
  • the cross network element is the i-th long chain. the network element at the intersection of the loop where the i-th long chain is located;
  • a distance requirement judgment unit used for judging whether the distance between the lowermost network element of the i-th long chain and the previous network element of the crossover network element satisfies the distance requirement
  • a port judgment unit configured to judge the bottommost network element of the i-th long chain when the distance between the lowermost network element of the i-th long chain and the previous network element of the cross-connection network element satisfies the distance requirement Whether there is a port corresponding to the optical fiber rate between the cross-connect element and the previous network element of the cross-connect element;
  • the optical fiber adding unit is configured to, when the lowermost network element of the i-th long chain has a port corresponding to the optical fiber speed between the cross-connected network element and the previous network element of the cross-connected network element, in the Add optical fiber between the lowermost network element of the i-th long chain and the previous network element of the crossover network element;
  • the latter network element acquisition unit is used when there is no port corresponding to the optical fiber speed between the cross-connect network element and the previous network element of the cross-connect network element on the lowermost network element of the i-th long chain, or When the distance between the lowermost network element of the i-th long chain and the previous network element of the cross network element does not meet the distance requirement, obtain the next network element of the cross network element;
  • the distance judging unit is also used for judging whether the distance between the lowermost network element of the i-th long chain and the next network element of the crossover network element satisfies the distance requirement;
  • the port judging unit is further configured to judge the lowest network element of the i-th long chain when the distance between the lowermost network element of the i-th long chain and the next network element of the cross-connect network element satisfies the distance requirement. Whether there is a port on the lower network element corresponding to the optical fiber rate between the cross-connect element and the network element following the cross-connect element;
  • the optical fiber adding unit is further configured to, when the lowermost network element of the i-th long chain has a port corresponding to the optical fiber speed between the cross-connected network element and the next network element of the cross-connected network element, An optical fiber is added between the lowermost network element of the i-th long chain and the next network element of the crossover network element; when the lowermost network element of the i-th long chain is not connected to the crossover network element and all network elements When the port corresponding to the optical fiber rate between the next network element of the cross-connect element is added, the network element corresponding to the cross-connect element and the next network element of the cross-connect element is added to the lowermost network element of the i-th long chain.
  • optical fibers Between the ports corresponding to the optical fiber rates, add optical fibers between the lowermost network element of the i-th long chain and the next network element of the crossover network element; when the lowermost network element of the i-th long chain and the crossover network element When the distance between the next network element of the network element does not meet the distance requirement, on the premise that the gain of the added optical fiber is positive, the other network elements except the lowest network element in the i-th long chain are connected with each other. On the ring where the i-th long chain is located, optical fibers are added between other network elements except the previous network element and the latter network element of the crossover network element.
  • the first service switching module specifically includes:
  • the first service switching unit is configured to switch the service passing through the optical fiber between the first network element and the second network element to the added optical fiber.
  • the second service switching module specifically includes:
  • a third network element obtaining unit configured to obtain a third network element corresponding to the optical fiber with the largest gain; the third network element is the network element connected to the optical fiber with the largest gain on the i-th long chain;
  • the second service switching unit is configured to switch the service passing through the optical fiber between the third network element and the fourth network element to the optical fiber with the largest gain; the fourth network element is the direction of the third network element to The next-hop network element for service transmission in the direction of the cross network element.
  • the present invention discloses the following technical effects:
  • the present invention effectively turns some unringed network elements in the PTN network into ringed network elements, improves the ringing rate of the access layer equipment, and improves the security and stability of the network. In the event of a failure, some mobile services may not be affected.
  • FIG. 1 is a schematic flowchart of a method for optimizing a loop of access layer equipment based on a packet transport network PTN according to the present invention
  • Figure 2 is a typical topology diagram of a network element of a local PTN network
  • Fig. 3 is the schematic diagram of access layer equipment forming a loop
  • FIG. 5 is a schematic flowchart of a system for optimizing a loop of access layer equipment based on a packet transport network PTN according to the present invention
  • FIG. 6 is a flow chart of a detailed method for solving an unringed network element.
  • FIG. 1 is a schematic flowchart of a method for optimizing a loop of an access layer device based on a packet transport network PTN according to the present invention. As shown in FIG. 1 , the method for optimizing the loop formation of an access layer device based on the packet transport network PTN of the present invention includes the following steps:
  • Step 100 Obtain network resource information of the PTN networking.
  • Figure 2 is a typical topology diagram of a network element of a local PTN network. As shown in Figure 2, the collection of PTN network resource information is the only way to generate a PTN network topology.
  • the collected network resource information includes information on PTN network elements, information on links where network elements that do not form a ring are located, and information on rings where long chains are located.
  • the PTN network element information includes network element level, network element name, network element type, network element IP, service usage classification and network element evaluation result, and the network element evaluation result shows whether each network element forms a loop .
  • the information on the link where the unringed network element is located includes a link ID, a link node, the number of link nodes, and a link evaluation result, and the link evaluation result shows whether each link is a long chain.
  • the information of the ring where the long chain is located includes the ring ID, the ring node, the number of the ring nodes, the main rate of the ring, and the loop evaluation result, and the loop evaluation result shows whether each ring is a giant ring.
  • the present invention performs loop-forming optimization for each long chain. The specific optimization process is shown in steps 200 to 700 .
  • Step 200 For the i-th long chain, according to the network resource information of the PTN networking, determine each network element on the i-th long chain and each network element on the ring where the i-th long chain is located. Whether there is a fiber optic connection between them. If yes, go to step 300; if no, go to step 500. Specifically, traverse each network element of the i-th long chain, and sequentially determine whether there is an optical fiber connection between each network element and each network element of the ring where the i-th long chain is located; When there is an optical fiber connection between the network element in the i-th long chain and the network element in the loop where the i-th long chain is located, step 300 is executed, and the gain g of this optical fiber is continued to be calculated. After each network element in the ith long chain and all network elements in the loop where the i-th long chain is located, all the optical fibers and the corresponding gains of all the optical fibers can be obtained.
  • FIG. 3 first obtain the information of network element B and network element D, obtain the previous network element C 1 and the next network element C 2 of B on the ring through network element B, and determine the difference between D and C 1 and C 2 respectively. If there is an optical fiber, calculate the gain of the optical fiber, and then record the network element information and optical fiber information and the corresponding gain. Then record the former of C 1 as C 1 and the latter of C 2 as C 2 , update C 1 and C 2 , and then judge whether there is an optical fiber between D and C 1 and C 2 , and iterate in turn, when When C1 reaches convergence 1 or C2 reaches convergence 2 , it only needs to continue traversing the side that has not reached the convergence.
  • the same method as above judges again whether there is an optical fiber between NE D and each NE on the ring, until NE D has traversed to NE D Stop at B. At this time, the entire chain has been traversed, and all the fibers between the entire long chain and the corresponding loop can be obtained.
  • the front and rear of the loop NEs refer to the order from aggregation 1 to aggregation 2 (or aggregation 2 to aggregation 1), and the front and rear of the long-chain NEs refer to the order from the lowest NE to the cross NE.
  • Step 300 When there is an optical fiber between the m-th network element on the i-th long chain and the n-th network element on the ring where the i-th long chain is located, calculate the gain g mn of the optical fiber.
  • the calculation method of the gain of each fiber is: when there is an optical fiber between the network element D of the i-th long chain and the network element C 1 (or C 2 ) of the loop where the i-th long chain is located, the fiber gain is the network element D Add 1 to the number of NEs between NE B and the crossover NE B, then subtract the number of NEs between NE B and NE C 1 (or C 2 ), that is, reduce the number of unringed NEs solved by this fiber.
  • the number of network elements to cause no looping is the gain of the fiber.
  • Step 400 Determine whether there is an optical fiber with a gain that is a positive integer. If yes, go to step 700; if no, go to step 500.
  • the gain of the fiber is calculated when the fiber is judged to exist. When the gain is a non-positive integer, the fiber and its gain are discarded; when the gain is a positive integer, the fiber and its gain are discarded.
  • the values are put into a set, and finally by judging whether the set is empty, it can be determined whether there is a fiber with a positive gain. If the set is empty, it means that the gain of each fiber is non-positive, or that there is no fiber between all the network elements of the i-th long chain and all the network elements of the ring where the i-th long chain is located.
  • Step 500 When there is no optical fiber with a gain of a positive integer, an optical fiber is added between the network element of the i-th long chain and the network element of the loop where the i-th long chain is located.
  • the specific process of adding fiber is as follows:
  • the cross-connect element is the cross position of the loop where the i-th long chain and the i-th long chain are located.
  • the A port corresponding to the optical fiber rate between the cross-connect element and the next network element of the cross-connect element is added on the lowermost network element, and the port corresponding to the optical fiber rate between the cross-connection network element and the network element following the cross-connection network element is added.
  • Step 600 According to the added optical fiber, switch the services passing through the i-th long-chain first network element and the second network element.
  • the first network element is a network element connected to the added optical fiber
  • the second network element is a next-hop network element for the first network element to perform service transmission in the direction of the cross network element. Specifically, the service passing through the optical fiber between the first network element and the second network element is switched to the added optical fiber.
  • Step 700 When there is an optical fiber with a gain of a positive integer, according to the gain of each optical fiber, switch the service of the optical fiber between the i-th long chain and the network element in the loop where the i-th long chain is located. Specifically, first, obtain the third network element and the fourth network element corresponding to the optical fiber with the largest gain; the third network element is the network element connected to the optical fiber with the largest gain on the i-th long chain, and the third network element is the network element connected to the optical fiber with the largest gain on the i-th long chain.
  • the fourth network element is the next-hop network element that the third network element performs service transmission in the direction of the cross network element. Then, the service passing through the optical fiber between the third network element and the fourth network element is switched to the optical fiber with the largest gain.
  • the optical fiber between A1 and F1 is the optical fiber with the largest gain value or the optical fiber added between A1 and F1 .
  • Each service passes through different routes, so the starting point of the service may be different, but the end point must be the aggregation network element, so the starting point may be different.
  • the starting point of the analysis service in the figure may have the following five types: Type A (network elements A 1 , A 2 ?? A i ), type B (network elements B 1 , B 2 ?? B i ), type D (network elements D 1 , D 2 , D 3 . . . D i ), class E (network elements E 1 , E 2 . . . E i ), class F (network elements F 1 , F 2 . . . Fi ) .
  • the end point of the tunnel (tunnel is the service) is convergence 1, no service switching is required. If the end point of the tunnel is convergence 2, when switching, 1 delete the B-type NE in the tunnel, that is, delete all the NEs between NE A 1 and NE C; 2 need to modify the output of NE A 1
  • the board and port number of the terminal, the modified board and port number are the board and port number of the optical fiber between A1 and F1 inserted in A1 ; 3Need to insert network element F1 and E - type network element, namely Insert NE F 1 , and insert all NEs between F 1 and NE C; 4 Modify the board and port number at the input end of NE C, and the modified board and port number are between C and E 2 .
  • the end point of the tunnel is convergence 2
  • no service switching is required; if the end point of the tunnel is convergence 1, during service switching, 1 if the starting point is B i , then delete all network elements between B i and network element A 1 , insert all network elements between network element B i and network element C, insert network element C, E-type network element, and F 1 network element; 2 Modify The board and port number of the output end of the B i NE, the modified board and port number are the board and port number of the optical fiber between B i and B i+1 inserted on the B i ; 3 Modify the A 1 NE The board and port number at the input end, the modified board and port number are the board and port number on which the optical fiber between A 1 and F 1 is inserted and on A 1 .
  • the end point of the tunnel (tunnel is the service) is aggregation 1.
  • 1 delete all type B network elements; 2 modify the board at the output end of network element C and port number, the modified board and port number are the board and port number where the optical fiber between C and E 2 is inserted on C; 3 Insert the E-type NE, insert the F 1 NE; 4 Modify the A 1 NE Enter the board and port number of the input end.
  • the modified board and port number are the board and port number of the optical fiber between A1 and F1 inserted on A1.
  • the end point of the tunnel is aggregation 2
  • no service switching is required. If the end point of the tunnel is aggregation 1, when the service switching is performed, 1 If the starting point of the tunnel is E i , delete all network elements between network element E i and network element C, delete network element C, and delete type B network elements; 2 insert network element E i and between network element E i and network element F1 Insert all network elements into F 1 network element; 3 Modify the board and port number of the output end of E i network element, the modified board and port number are the optical fiber between E i and E i-1 inserted on E i Board and port number; 4 Modify the board and port number at the input end of NE A 1. The modified board and port number are the board and port number where the optical fiber between A 1 and F 1 is inserted on A 1 .
  • the end point of the tunnel is aggregation 2
  • no service switching is required.
  • 1 delete the E-type network element.
  • delete network element C delete type B network element
  • 2 Modify the board and port number at the output end of F1 network element, the modified board and port number are the board on which the optical fiber between A1 and F1 is inserted on F1 Card and port number
  • 3 Modify the board and port number at the input end of A1 NE, the modified board and port number are the board and port number where the optical fiber between A1 and F1 is inserted on A1.
  • FIG. 5 is a schematic flowchart of a system for optimizing a loop of access layer equipment based on a packet transport network PTN according to the present invention.
  • the loop-forming optimization system of the access layer equipment based on the packet transport network PTN of the present invention includes the following structures:
  • the network resource information acquisition module 501 is configured to acquire network resource information of the PTN networking; the network resource information includes the information of the PTN network element, the information of the link where the non-ring network element is located, and the information of the ring where the long chain is located; the PTN network element
  • the information includes network element parameters, service usage classification, and network element evaluation results.
  • the network element evaluation results show whether each network element forms a ring; the information on the links where the non-ring network elements are located includes link parameters and link evaluation results.
  • the link evaluation result shows whether each link is a long chain; the loop information where the long chain is located includes loop parameters and loop evaluation results, and the loop evaluation result shows whether each loop is a giant ring.
  • the optical fiber judgment module 502 is used for, for the i-th long chain, according to the network resource information of the PTN networking, to determine the difference between each network element on the i-th long chain and the loop where the i-th long chain is located. Whether there is an optical fiber connection between each network element.
  • the optical fiber gain calculation module 503 is configured to calculate the optical fiber when there is an optical fiber between the m-th network element on the i-th long chain and the n-th network element on the loop where the i-th long chain is located The gain g mn .
  • the optical fiber adding module 504 is used for when the gain of each optical fiber is a non-positive value, or when all the network elements of the i-th long chain and all the network elements of the loop where the i-th long chain is located are different. When there is no optical fiber in between, an optical fiber is added between the network element of the i-th long chain and the network element of the ring where the i-th long chain is located.
  • the first service switching module 505 is configured to switch the service passing through the i-th long-chain first network element and the second network element according to the added optical fiber; the first network element is the same as the added optical fiber.
  • the connected network element, the second network element is the next-hop network element that the first network element performs service transmission in the direction of the cross network element; the cross network element is the i-th long chain and the first network element.
  • the second service switching module 506 is configured to, when the gains of all optical fibers are not all non-positive values, according to the gain of each optical fiber, for the i-th long chain and the network in the loop where the i-th long chain is located. The services of the optical fibers between the elements are switched.
  • the ring-forming optimization module 507 is used to sequentially switch the services of each long chain and the optical fibers between the network elements in the ring where the long chain is located, so as to complete the ring-forming optimization of the access layer equipment of the PTN networking.
  • the optical fiber adding module 504 specifically includes:
  • the lowermost network element and the previous network element obtaining unit used to obtain the lowermost network element of the i-th long chain and the previous network element of the cross network element; the cross network element is the i-th long chain.
  • the distance requirement judgment unit is used for judging whether the distance between the lowermost network element of the i-th long chain and the previous network element of the cross network element satisfies the distance requirement.
  • a port judgment unit configured to judge the bottommost network element of the i-th long chain when the distance between the lowermost network element of the i-th long chain and the previous network element of the cross-connection network element satisfies the distance requirement Whether there is a port corresponding to the fiber speed between the cross-connect element and the previous network element of the cross-connect element.
  • the optical fiber adding unit is configured to, when the lowermost network element of the i-th long chain has a port corresponding to the optical fiber speed between the cross-connected network element and the previous network element of the cross-connected network element, in the An optical fiber is added between the lowermost NE of the i-th long chain and the preceding NE of the crossover NE.
  • the latter network element acquisition unit is used when there is no port corresponding to the optical fiber speed between the cross-connect network element and the previous network element of the cross-connect network element on the lowermost network element of the i-th long chain, or When the distance between the lowermost network element of the i-th long chain and the previous network element of the cross-connect element does not meet the distance requirement, acquire the next network element of the cross-connect network element.
  • the distance judging unit is further configured to judge whether the distance between the lowermost network element of the i-th long chain and the next network element of the cross network element satisfies the distance requirement.
  • the port judging unit is further configured to judge the lowest network element of the i-th long chain when the distance between the lowermost network element of the i-th long chain and the next network element of the cross-connect network element satisfies the distance requirement. Whether there is a port on the lower network element that corresponds to the fiber speed between the cross-connect element and the network element following the cross-connect element.
  • the optical fiber adding unit is further configured to, when the lowermost network element of the i-th long chain has a port corresponding to the optical fiber speed between the cross-connected network element and the next network element of the cross-connected network element, An optical fiber is added between the lowermost network element of the i-th long chain and the next network element of the crossover network element; when the lowermost network element of the i-th long chain is not connected to the crossover network element and all network elements When the port corresponding to the optical fiber rate between the next network element of the cross-connect element is added, the network element corresponding to the cross-connect element and the next network element of the cross-connect element is added to the lowermost network element of the i-th long chain.
  • the first service switching module 505 specifically includes:
  • the first service switching unit is configured to switch the service passing through the optical fiber between the first network element and the second network element to the added optical fiber.
  • the second service switching module 506 specifically includes:
  • the third network element obtaining unit is configured to obtain the third network element corresponding to the optical fiber with the largest gain; the third network element is the network element connected to the optical fiber with the largest gain on the i-th long chain.
  • the second service switching unit is configured to switch the service passing through the optical fiber between the third network element and the fourth network element to the optical fiber with the largest gain; the fourth network element is the direction of the third network element to The next-hop network element for service transmission in the direction of the cross network element.
  • the collection of PTN network resource information is the only way to generate the PTN network topology.
  • the PTN network resource information collected in box 1 in Figure 6 is output in the form of excel.
  • the ring formation rate is calculated by dividing the number of non-ring network elements by the total number of access layer network elements.

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Abstract

本发明涉及一种基于分组传送网PTN的接入层设备成环优化方法及系统。该方法包括：获取PTN组网的网络资源信息；判断第i个长链上的每一个网元与第i个长链所在的环路上的每一个网元之间是否有光纤连接；若存在，计算该光纤的增益gmn；当每个光纤的增益均为非正值，或者没有光纤时，在第i个长链的网元与第i个长链所在环路的网元之间增加光纤；根据增加的光纤，对经过第i个长链第一网元和第二网元的业务进行切换；当所有光纤的增益不全为非正值时，根据每个光纤的增益，对第i个长链和第i个长链所在环路中的网元之间光纤的业务进行切换；依次对每个长链和长链所在环路中网元之间光纤的业务进行切换，完成PTN组网的接入层设备成环优化。本发明可以提高成环率，提高网络安全性。

Description

基于分组传送网PTN的接入层设备成环优化方法及系统 技术领域
本发明涉及分组传送网络优化领域，特别是涉及一种基于分组传送网PTN的接入层设备成环优化方法及系统。
背景技术
随着智能终端的普及，人类社会进入了移动互联网时代，从而可传输大容量信息，而信息的传递离不开信息的传送通道-承载网。承载网是各运营商构建的一张专网，用于承载各种语音和数据业务，通常以光纤作为传输媒介。
现阶段，承载网中引入了PTN组网，现有PTN采用三层网络结构，包括：接入层、汇聚层和核心层。在网络运行过程中，设备是否成环对网络稳定性影响巨大，不成环的设备在单点线路或设备故障发生时可能会影响大量移动业务。尽可能的使网络成环，就成为了提升网络安全性的重要操作。
PTN组网配置过程中，接入层设备大多都会成环，成环条件是使其存在至少2条完全不重复的路径，最终连接到汇聚层设备上，但是仍然会有少量的接入层设备没有成环，这就会导致在网络动荡的时候影响大量的业务。
发明内容
本发明的目的是提供一种基于分组传送网PTN的接入层设备成环优化方法及系统，以提高接入层设备的成环率，提高网络安全性。
为实现上述目的，本发明提供了如下方案：
一种基于分组传送网PTN的接入层设备成环优化方法，包括：
获取PTN组网的网络资源信息；所述网络资源信息包括PTN网元信息、未成环网元所在链路信息和长链所在环路信息；所述PTN网元信息包括网元参数、业务使用分类和网元评估结果，所述网元评估结果中显示每个网元是否成环；所述未成环网元所在链路信息包括链路参数和链路评估结果，所述链路评估结果中显示每个链路是否为长链；所述长链所在环路信息包括环路参数和 环路评估结果，所述环路评估结果中显示每个环路是否为巨环；
对于第i个长链，根据所述PTN组网的网络资源信息，判断第i个长链上的每一个网元与所述第i个长链所在的环路上的每一个网元之间是否有光纤连接；
当所述第i个长链上的第m个网元与所述第i个长链所在的环路上的第n个网元之间有光纤时，计算该光纤的增益g mn；
当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤；
根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换；所述第一网元为与所述增加的光纤连接的网元，所述第二网元为所述第一网元向交叉网元方向进行业务传输的下一跳网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换；
依次对每个长链和长链所在环路中网元之间光纤的业务进行切换，完成PTN组网的接入层设备成环优化。
可选的，所述网元参数包括网元层次、网元名称、网元类型和网元IP；所述链路参数包括链路ID、链路节点和链路节点数；所述环路参数包括环路ID、环路节点、环路节点数和环路主速率。
可选的，当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤，具体包括：
获取所述第i个长链的最下网元和交叉网元的前一个网元；
判断所述第i个长链的最下网元和交叉网元的前一个网元之间的距离是否满足距离要求；
当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离满足距 离要求时，判断所述第i个长链的最下网元上是否有与交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口；
当所述第i个长链的最下网元上有与交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的前一个网元之间增加光纤；
当所述第i个长链的最下网元上没有与交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口，或者当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离不满足距离要求时，获取所述交叉网元的后一个网元；
判断所述第i个长链的最下网元和交叉网元的后一个网元之间的距离是否满足距离要求；
当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口；
当所述第i个长链的最下网元上有与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；
当所述第i个长链的最下网元上没有与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元上增加与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；
当所述第i个长链的最下网元和交叉网元和所述交叉网元的后一个网元之间的距离不满足距离要求时，在保证增加的光纤的增益为正和距离满足距离要求的前提下，在所述第i个长链除最下网元之外的其他网元与第i个长链所在环路上除交叉网元的前一个网元和后一个网元之外的其他网元之间增加光纤。
可选的，所述根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换，具体包括：
将经过所述第一网元与所述第二网元之间光纤的业务切换至所述增加的光纤上。
可选的，所述当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换，具体包括：
获取增益最大的光纤对应的第三网元；所述第三网元为所述第i个长链上与所述增益最大的光纤连接的网元；
将经过所述第三网元与第四网元之间光纤的业务切换至所述增益最大的光纤上；所述第四网元为所述第三网元向交叉网元方向进行业务传输的下一跳网元。
本发明还提供一种基于分组传送网PTN的接入层设备成环优化系统，包括：
网络资源信息获取模块，用于获取PTN组网的网络资源信息；所述网络资源信息包括PTN网元信息、未成环网元所在链路信息和长链所在环路信息；所述PTN网元信息包括网元参数、业务使用分类和网元评估结果，所述网元评估结果中显示每个网元是否成环；所述未成环网元所在链路信息包括链路参数和链路评估结果，所述链路评估结果中显示每个链路是否为长链；所述长链所在环路信息包括环路参数和环路评估结果，所述环路评估结果中显示每个环路是否为巨环；
光纤判断模块，用于对于第i个长链，根据所述PTN组网的网络资源信息，判断第i个长链上的每一个网元与所述第i个长链所在的环路上的每一个网元之间是否有光纤连接；
光纤增益计算模块，用于当所述第i个长链上的第m个网元与所述第i个长链所在的环路上的第n个网元之间有光纤时，计算该光纤的增益g mn；
光纤增加模块，用于当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤；
第一业务切换模块，用于根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换；所述第一网元为与所述增加的光纤连接的网元，所述第二网元为所述第一网元向交叉网元方向进行业务传输的下一跳网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
第二业务切换模块，用于当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换；
成环优化模块，用于依次对每个长链和长链所在环路中网元之间光纤的业务进行切换，完成PTN组网的接入层设备成环优化。
可选的，所述光纤增加模块具体包括：
最下网元和前一个网元获取单元，用于获取所述第i个长链的最下网元和交叉网元的前一个网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
距离要求判断单元，用于判断所述第i个长链的最下网元和交叉网元的前一个网元之间的距离是否满足距离要求；
端口判断单元，用于当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口；
光纤增加单元，用于当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的前一个网元之间增加光纤；
后一个网元获取单元，用于当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口，或者当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离不满足距离要求时，获取所述交叉网元的后一个网元；
所述距离判断单元，还用于判断所述第i个长链的最下网元和交叉网元的 后一个网元之间的距离是否满足距离要求；
所述端口判断单元，还用于当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口；
所述光纤增加单元，还用于当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元上增加与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离不满足距离要求时，在保证增加的光纤的增益为正的前提下，在所述第i个长链除最下网元之外的其他网元与第i个长链所在环路上除交叉网元的前一个网元和后一个网元之外的其他网元之间增加光纤。
可选的，所述第一业务切换模块具体包括：
第一业务切换单元，用于将经过所述第一网元与所述第二网元之间光纤的业务切换至所述增加的光纤上。
可选的，所述第二业务切换模块具体包括：
第三网元获取单元，用于获取增益最大的光纤对应的第三网元；所述第三网元为所述第i个长链上与所述增益最大的光纤连接的网元；
第二业务切换单元，用于将经过所述第三网元与第四网元之间光纤的业务切换至所述增益最大的光纤上；所述第四网元为所述第三网元向交叉网元方向进行业务传输的下一跳网元。
根据本发明提供的具体实施例，本发明公开了以下技术效果：
本发明通过增加光纤以及业务切换的操作，有效的将PTN网络中部分未成环网元变成成环网元，提高了接入层设备的成环率，提升了网络的安全性和稳定性，在发生故障时，部分移动业务可以不受影响。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明基于分组传送网PTN的接入层设备成环优化方法的流程示意图；
图2为本地PTN网络的网元典型拓扑图；
图3为接入层设备成环示意图；
图4为业务切换过程示意图；
图5为本发明基于分组传送网PTN的接入层设备成环优化系统的流程示意图；
图6为解决未成环网元的详细方法流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1为本发明基于分组传送网PTN的接入层设备成环优化方法的流程示意图。如图1所示，本发明基于分组传送网PTN的接入层设备成环优化方法包括以下步骤：
步骤100：获取PTN组网的网络资源信息。图2为本地PTN网络的网元典型拓扑图，如图2所示，PTN网络资源信息的采集是生成PTN网络拓扑的必由之路。采集的所述网络资源信息包括PTN网元信息、未成环网元所在链 路信息和长链所在环路信息。
具体的，所述PTN网元信息包括网元层次、网元名称、网元类型、网元IP、业务使用分类和网元评估结果，所述网元评估结果中显示每个网元是否成环。所述未成环网元所在链路信息包括链路ID、链路节点、链路节点数和链路评估结果，所述链路评估结果中显示每个链路是否为长链。所述长链所在环路信息包括环路ID、环路节点、环路节点数、环路主速率和环路评估结果，所述环路评估结果中显示每个环路是否为巨环。本发明针对每个长链，进行成环优化。具体优化过程如步骤200-步骤700所示。
步骤200：对于第i个长链，根据所述PTN组网的网络资源信息，判断第i个长链上的每一个网元与所述第i个长链所在的环路上的每一个网元之间是否有光纤连接。如果是，执行步骤300；如果否，执行步骤500。具体的，对所述第i个长链的每一个网元进行遍历，依次判断每一个网元与所述第i个长链所在环路的每一个网元之间是否有光纤连接；当所述第i个长链中的网元与所述第i个长链所在环路的网元之间有光纤连接时，执行步骤300，继续计算此光纤的增益g，当遍历完所述第i个长链中的每一个网元与所述第i个长链所在环路的所有网元后，可以得到所有的光纤，以及所有光纤对应的增益。
以图3为例，首先获得网元B和网元D的信息，通过网元B在环上获得B的前一个网元C 1和后一个C 2，分别判断D与C 1和C 2之间有没有光纤，如果有就计算该光纤的增益，再记录网元信息和光纤信息以及对应的增益。再将C 1的前一个记为C 1，C 2的后一个记为C 2，对C 1和C 2进行更新，再判断D与C 1和C 2之间有没有光纤，依次迭代，当C 1到达汇聚1或者C 2到达汇聚2时，就只需继续遍历未到达汇聚的一侧，当两侧都到达汇聚后，环上的网元遍历完成。接着进行链上的遍历，将网元D的后一个记为网元D，同上的方法再次判断网元D与环上的每一个网元之间是否有光纤，直到网元D遍历到了网元B时停止，此时整条链都遍历完成，可以得到整条长链与对应的环路之间所有的光纤。环路上网元的前后是指为从汇聚1至汇聚2(或者汇聚2至汇聚1)依次排列的顺序，长链上网元的前后是指从最下网元至交叉网元依次排列的顺序。
步骤300：当第i个长链上的第m个网元与第i个长链所在的环路上的第n个网元之间有光纤时，计算该光纤的增益g mn。每条光纤的增益计算方式是：当第i个长链的网元D与第i个长链所在环路的网元C 1(或C 2)之间有光纤时，光纤增益为网元D与交叉网元B之间的网元个数加1再减去网元B与网元C 1(或C 2)之间的网元数，即利用此条光纤解决的未成环网元数减去造成未成环的网元数就是光纤的增益。
步骤400：判断是否存在增益为正整数的光纤。如果是，执行步骤700；如果否，执行步骤500。当第i个长链与第i个长链所在的环路之间有多条光纤时，需要判断是否存在增益为正整数的光纤。在步骤200-步骤300中会在判断有光纤的时候计算该光纤的增益，当增益为非正整数时，舍弃该光纤和它的增益；当增益为正整数时，将该光纤和它的增益值放入一个集合中，最后通过判断该集合是否为空，可以确定是否存在增益为正整数的光纤。该集合为空表示每个光纤的增益均为非正值，或者第i个长链的所有网元均与第i个长链所在的环路的所有网元之间没有光纤。
步骤500：当不存在增益为正整数的光纤，在第i个长链的网元与第i个长链所在环路的网元之间增加光纤。增加光纤的具体过程如下：
获取所述第i个长链的最下网元和交叉网元的前一个网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
判断所述第i个长链的最下网元和交叉网元的前一个网元之间的距离是否满足距离要求；满足距离要求是指第i个长链的最下网元和交叉网元的前一个网元之间的距离满足(小于或等于)增加光纤所能传输的最大距离；
当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口；
当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的前一个网元之间增加光纤；
当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的前 一个网元之间光纤速率对应的端口，或者当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离不满足距离要求时，获取所述交叉网元的后一个网元；
判断所述第i个长链的最下网元和交叉网元的后一个网元之间的距离是否满足距离要求；
当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口；
当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；
当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元上增加与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；
当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离不满足距离要求时，在保证增加的光纤的增益为正和满足距离要求的前提下，在所述第i个长链除最下网元之外的其他网元与第i个长链所在环路上除交叉网元和交叉网元的前一个网元和后一个网元之外的其他网元之间增加光纤。
以图3所示的成环示意图为例，当所有光纤的增益均为非正值或者不存在光纤时，则需要在长链最下网元D与环上交叉网元B的前一个网元C 1(后一个C 2)之间加光纤，来使得这条长链上的网元成环。首先，判断网元D与网元C 1之间的距离是否满足距离要求，再判断D上是否有与网元D和前一个网元C 1之间光纤速率相同的端口，距离和端口同时符合则在此处加光纤，此条长链处理完成。当距离不满足或者距离满足端口不满足时，则判断C 2与D之间能否加光纤，同样的判断距离和端口，当距离和端口都满足时则在此处加光纤，此条长链处理完成；当距离符合但端口不符合时，则在网元D的空闲板卡上加上同速率的端口，然后进行加光纤；当距离不满足时，则可在保证最后 增益为正和距离满足的情况下，在长链的其他网元和环上的其他网元之间加光纤。
步骤600：根据增加的光纤，对经过第i个长链第一网元和第二网元的业务进行切换。所述第一网元为与所述增加的光纤连接的网元，所述第二网元为所述第一网元向交叉网元方向进行业务传输的下一跳网元。具体的，将经过所述第一网元与所述第二网元之间光纤的业务切换至所述增加的光纤上。
步骤700：当存在增益为正整数的光纤时，根据每个光纤的增益，对第i个长链和第i个长链所在环路中的网元之间光纤的业务进行切换。具体的，首先，获取增益最大的光纤对应的第三网元和第四网元；所述第三网元为所述第i个长链上与所述增益最大的光纤连接的网元，第四网元为所述第三网元向交叉网元方向进行业务传输的下一跳网元。然后，将经过所述第三网元与第四网元之间光纤的业务切换至所述增益最大的光纤上。
以图4所示的成环图为例，对步骤600和步骤700的业务切换过程进行具体说明。如图4所示，假设A 1和F 1之间的光纤为增益值最大的光纤或者在A 1和F 1之间增加了的光纤，在进行业务切换时，由于链和环中会有多条业务经过，每条业务经过的路线不同，所以业务的起点可能不同，但是终点一定会是汇聚网元，所以起点可能有多中情况。图中的分析业务起点可能有以下5类情；A类(网元A 1、A 2……A i)、B类(网元B 1、B 2……B i)、D类(网元D 1、D 2、D 3……D i)、E类(网元E 1、E 2……E i)、F类(网元F 1、F 2……F i)。
对于起点为A类网元的，在业务切换过程中，如果tunnel(tunnel即为业务)的终点是汇聚1，则不用进行业务切换。如果tunnel的终点是汇聚2，所在在切换时，①要删除该tunnel中的B类网元，即删除网元A 1与网元C之间的所有网元；②需要修改A 1网元输出端的板卡和端口号，修改的板卡和端口号为A 1与F 1之间光纤插在在A 1上的板卡和端口号；③需要插入网元F 1和E类网元，即插入网元F 1，插入F 1与网元C之间的所有网元；④修改网元C输入端的板卡和端口号，修改的板卡和端口号为C与E 2之间光纤插在在C上的板卡和端口号。
对于起点为B类网元的，在业务切换过程中，如果tunnel的终点是汇聚2， 则不用进行业务切换，如果tunnel的终点是汇聚1，则在进行业务切换时，①如果起点是B i，则删除B i与网元A 1之间的所有网元，插入网元B i与网元C之间的所有网元，插入网元C，E类网元，F 1网元；②修改B i网元的输出端的板卡和端口号，修改的板卡和端口号为B i与B i+1之间光纤插在在B i上的板卡和端口号；③修改A 1网元的输入端的板卡和端口号，修改的板卡和端口号为A 1与F 1之间光纤插在和A 1上的板卡和端口号。
对于起点为D类网元的，在业务切换过程中，tunnel(tunnel即为业务)的终点是汇聚1，所在在切换时，①删除所有B类网元；②修改网元C输出端的板卡和端口号，修改的板卡和端口号为C与E 2之间光纤插在在C上的板卡和端口号；③插入E类网元，插入F 1网元；④修改A 1网元输入端的板卡和端口号，修改的板卡和端口号为A 1与F 1之间光纤插在在A 1上的板卡和端口号。
对于起点为E类网元的，在业务切换过程中，如果tunnel的终点是汇聚2，则不用进行业务切换，如果tunnel的终点是汇聚1，则在进行业务切换时，①如果tunnel的起点为E i，则删除网元E i与网元C之间的所有网元，删除C网元，删除B类网元；②插入E i网元和E i网元与F 1网元之间的所有网元，插入F 1网元；③修改E i网元的输出端的板卡和端口号，修改的板卡和端口号为E i与E i-1之间光纤插在在E i上的板卡和端口号；④修改A 1网元输入端的板卡和端口号，修改的板卡和端口号为A 1与F 1之间光纤插在在A 1上的板卡和端口号。
对于起点为F类网元的，在业务切换过程中，如果tunnel的终点是汇聚2，则不用进行业务切换，如果tunnel的终点是汇聚1，则在进行业务切换时，①删除E类网元，删除网元C，删除B类网元；②修改F 1网元输出端的板卡和端口号，修改的板卡和端口号为A 1与F 1之间光纤插在在F 1上的板卡和端口号；③修改A 1网元输入端的板卡和端口号，修改的板卡和端口号为A 1与F 1之间光纤插在在A 1上的板卡和端口号。
在业务切换过程中，对每条长链和环的每一条业务都要进行对应的业务切换。
采用上述过程，依次对每个长链和长链所在环路中网元之间光纤的业务进 行切换，完成PTN组网的接入层设备成环优化。
图5为本发明基于分组传送网PTN的接入层设备成环优化系统的流程示意图。如图5所示，本发明基于分组传送网PTN的接入层设备成环优化系统包括以下结构：
网络资源信息获取模块501，用于获取PTN组网的网络资源信息；所述网络资源信息包括PTN网元信息、未成环网元所在链路信息和长链所在环路信息；所述PTN网元信息包括网元参数、业务使用分类和网元评估结果，所述网元评估结果中显示每个网元是否成环；所述未成环网元所在链路信息包括链路参数和链路评估结果，所述链路评估结果中显示每个链路是否为长链；所述长链所在环路信息包括环路参数和环路评估结果，所述环路评估结果中显示每个环路是否为巨环。
光纤判断模块502，用于对于第i个长链，根据所述PTN组网的网络资源信息，判断第i个长链上的每一个网元与所述第i个长链所在的环路上的每一个网元之间是否有光纤连接。
光纤增益计算模块503，用于当所述第i个长链上的第m个网元与所述第i个长链所在的环路上的第n个网元之间有光纤时，计算该光纤的增益g mn。
光纤增加模块504，用于当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤。
第一业务切换模块505，用于根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换；所述第一网元为与所述增加的光纤连接的网元，所述第二网元为所述第一网元向交叉网元方向进行业务传输的下一跳网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元。
第二业务切换模块506，用于当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换。
成环优化模块507，用于依次对每个长链和长链所在环路中网元之间光纤 的业务进行切换，完成PTN组网的接入层设备成环优化。
作为具体实施例，本发明基于分组传送网PTN的接入层设备成环优化系统中，所述光纤增加模块504具体包括：
最下网元和前一个网元获取单元，用于获取所述第i个长链的最下网元和交叉网元的前一个网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元。
距离要求判断单元，用于判断所述第i个长链的最下网元和交叉网元的前一个网元之间的距离是否满足距离要求。
端口判断单元，用于当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口。
光纤增加单元，用于当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的前一个网元之间增加光纤。
后一个网元获取单元，用于当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口，或者当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离不满足距离要求时，获取所述交叉网元的后一个网元。
所述距离判断单元，还用于判断所述第i个长链的最下网元和交叉网元的后一个网元之间的距离是否满足距离要求。
所述端口判断单元，还用于当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口。
所述光纤增加单元，还用于当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率 对应的端口时，在所述第i个长链的最下网元上增加与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离不满足距离要求时，在保证增加的光纤的增益为正和满足距离要求的前提下，在所述第i个长链除最下网元之外的其他网元与第i个长链所在环路上除交叉网元的前一个网元和后一个网元之外的其他网元之间增加光纤。
作为具体实施例，本发明基于分组传送网PTN的接入层设备成环优化系统中，所述第一业务切换模块505具体包括：
第一业务切换单元，用于将经过所述第一网元与所述第二网元之间光纤的业务切换至所述增加的光纤上。
作为具体实施例，本发明基于分组传送网PTN的接入层设备成环优化系统中，所述第二业务切换模块506具体包括：
第三网元获取单元，用于获取增益最大的光纤对应的第三网元；所述第三网元为所述第i个长链上与所述增益最大的光纤连接的网元。
第二业务切换单元，用于将经过所述第三网元与第四网元之间光纤的业务切换至所述增益最大的光纤上；所述第四网元为所述第三网元向交叉网元方向进行业务传输的下一跳网元。
下面提供一个具体实施例，进一步说明本发明的上述方案。如图6所示，包括以下过程：
(1)采集PTN网络资源信息并计算成环率。PTN网络资源信息的采集是生成PTN网络拓扑的必由之路。图6中框①中采集的PTN网络资源信息以excel的形式输出。成环率为未成环网元数除以总的接入层网元数。
(2)获取可利用光纤信息及其增益。如图6中未被框选的部分所示，根据采集的PTN成环和未成环网元信息中未成环网元的网元名称，然后在未成环网元所在长链信息查找每一个未成环网元所在的长链，然后在长链所在环路信息查找每一个长链所处的环。
(3)进行加光纤操作。如图6中框②所示，当上述步骤(2)中遍历完长链的所有网元后，记录光纤和该光纤增益的集合为空时，则需要进行加光纤操作来使得这条长链上的网元成环。
(4)进行业务切换。
(5)数据评估并重新计算成环率。如图6中框③所示，在所有的未成环网元都遍历一遍后，再进修改后的数据进行一次评估，得到新的PTN网络资源信息，再计算一遍成环率，然后将修改前后的成环率进行对比。本实施例基于黄石网管中实施，成环率有原始的66％提升至83％，有较好的效果。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的系统而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本发明的限制。

Claims (9)

  1. 一种基于分组传送网PTN的接入层设备成环优化方法，其特征在于，包括：
    获取PTN组网的网络资源信息；所述网络资源信息包括PTN网元信息、未成环网元所在链路信息和长链所在环路信息；所述PTN网元信息包括网元参数、业务使用分类和网元评估结果，所述网元评估结果中显示每个网元是否成环；所述未成环网元所在链路信息包括链路参数和链路评估结果，所述链路评估结果中显示每个链路是否为长链；所述长链所在环路信息包括环路参数和环路评估结果，所述环路评估结果中显示每个环路是否为巨环；
    对于第i个长链，根据所述PTN组网的网络资源信息，判断第i个长链上的每一个网元与所述第i个长链所在的环路上的每一个网元之间是否有光纤连接；
    当所述第i个长链上的第m个网元与所述第i个长链所在的环路上的第n个网元之间有光纤时，计算该光纤的增益g mn；
    当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤；
    根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换；所述第一网元为与所述增加的光纤连接的网元，所述第二网元为所述第一网元向交叉网元方向进行业务传输的下一跳网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
    当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换；
    依次对每个长链和长链所在环路中网元之间光纤的业务进行切换，完成PTN组网的接入层设备成环优化。
  2. 根据权利要求1所述的基于分组传送网PTN的接入层设备成环优化方法，其特征在于，所述网元参数包括网元层次、网元名称、网元类型和网元IP；所述链路参数包括链路ID、链路节点和链路节点数；所述环路参数包括环路 ID、环路节点、环路节点数和环路主速率。
  3. 根据权利要求1所述的基于分组传送网PTN的接入层设备成环优化方法，其特征在于，当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤，具体包括：
    获取所述第i个长链的最下网元和交叉网元的前一个网元；
    判断所述第i个长链的最下网元和交叉网元的前一个网元之间的距离是否满足距离要求；
    当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口；
    当所述第i个长链的最下网元上有与交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的前一个网元之间增加光纤；
    当所述第i个长链的最下网元上没有与交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口，或者当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离不满足距离要求时，获取所述交叉网元的后一个网元；
    判断所述第i个长链的最下网元和交叉网元的后一个网元之间的距离是否满足距离要求；
    当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口；
    当所述第i个长链的最下网元上有与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；
    当所述第i个长链的最下网元上没有与交叉网元和所述交叉网元的后一个 网元之间光纤速率对应的端口时，在所述第i个长链的最下网元上增加与交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；
    当所述第i个长链的最下网元和交叉网元和所述交叉网元的后一个网元之间的距离不满足距离要求时，在保证增加的光纤的增益为正和距离满足距离要求的前提下，在所述第i个长链除最下网元之外的其他网元与第i个长链所在环路上除交叉网元的前一个网元和后一个网元之外的其他网元之间增加光纤。
  4. 根据权利要求1所述的基于分组传送网PTN的接入层设备成环优化方法，其特征在于，所述根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换，具体包括：
    将经过所述第一网元与所述第二网元之间光纤的业务切换至所述增加的光纤上。
  5. 根据权利要求1所述的基于分组传送网PTN的接入层设备成环优化方法，其特征在于，所述当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换，具体包括：
    获取增益最大的光纤对应的第三网元；所述第三网元为所述第i个长链上与所述增益最大的光纤连接的网元；
    将经过所述第三网元与第四网元之间光纤的业务切换至所述增益最大的光纤上；所述第四网元为所述第三网元向交叉网元方向进行业务传输的下一跳网元。
  6. 一种基于分组传送网PTN的接入层设备成环优化系统，其特征在于，包括：
    网络资源信息获取模块，用于获取PTN组网的网络资源信息；所述网络资源信息包括PTN网元信息、未成环网元所在链路信息和长链所在环路信息；所述PTN网元信息包括网元参数、业务使用分类和网元评估结果，所述网元评估结果中显示每个网元是否成环；所述未成环网元所在链路信息包括链路参数和链路评估结果，所述链路评估结果中显示每个链路是否为长链；所述长链 所在环路信息包括环路参数和环路评估结果，所述环路评估结果中显示每个环路是否为巨环；
    光纤判断模块，用于对于第i个长链，根据所述PTN组网的网络资源信息，判断第i个长链上的每一个网元与所述第i个长链所在的环路上的每一个网元之间是否有光纤连接；
    光纤增益计算模块，用于当所述第i个长链上的第m个网元与所述第i个长链所在的环路上的第n个网元之间有光纤时，计算该光纤的增益g mn；
    光纤增加模块，用于当每个光纤的增益均为非正值，或者当所述第i个长链的所有网元均与所述第i个长链所在的环路的所有网元之间没有光纤时，在所述第i个长链的网元与所述第i个长链所在环路的网元之间增加光纤；
    第一业务切换模块，用于根据增加的光纤，对经过所述第i个长链第一网元和第二网元的业务进行切换；所述第一网元为与所述增加的光纤连接的网元，所述第二网元为所述第一网元向交叉网元方向进行业务传输的下一跳网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
    第二业务切换模块，用于当所有光纤的增益不全为非正值时，根据每个光纤的增益，对所述第i个长链和所述第i个长链所在环路中的网元之间光纤的业务进行切换；
    成环优化模块，用于依次对每个长链和长链所在环路中网元之间光纤的业务进行切换，完成PTN组网的接入层设备成环优化。
  7. 根据权利要求6所述的基于分组传送网PTN的接入层设备成环优化系统，其特征在于，所述光纤增加模块具体包括：
    最下网元和前一个网元获取单元，用于获取所述第i个长链的最下网元和交叉网元的前一个网元；所述交叉网元为所述第i个长链与所述第i个长链所在环路交叉位置的网元；
    距离要求判断单元，用于判断所述第i个长链的最下网元和交叉网元的前一个网元之间的距离是否满足距离要求；
    端口判断单元，用于当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口；
    光纤增加单元，用于当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的前一个网元之间增加光纤；
    后一个网元获取单元，用于当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的前一个网元之间光纤速率对应的端口，或者当所述第i个长链的最下网元和交叉网元的前一个网元之间的距离不满足距离要求时，获取所述交叉网元的后一个网元；
    所述距离判断单元，还用于判断所述第i个长链的最下网元和交叉网元的后一个网元之间的距离是否满足距离要求；
    所述端口判断单元，还用于当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离满足距离要求时，判断所述第i个长链的最下网元上是否有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口；
    所述光纤增加单元，还用于当所述第i个长链的最下网元上有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；当所述第i个长链的最下网元上没有与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口时，在所述第i个长链的最下网元上增加与所述交叉网元和所述交叉网元的后一个网元之间光纤速率对应的端口，在所述第i个长链的最下网元和交叉网元的后一个网元之间增加光纤；当所述第i个长链的最下网元和交叉网元的后一个网元之间的距离不满足距离要求时，在保证增加的光纤的增益为正和满足距离要求的前提下，在所述第i个长链除最下网元之外的其他网元与第i个长链所在环路上除交叉网元的前一个网元和后一个网元之外的其他网元之间增加光纤。
  8. 根据权利要求6所述的基于分组传送网PTN的接入层设备成环优化系统，其特征在于，所述第一业务切换模块具体包括：
    第一业务切换单元，用于将经过所述第一网元与所述第二网元之间光纤的业务切换至所述增加的光纤上。
  9. 根据权利要求6所述的基于分组传送网PTN的接入层设备成环优化系统，其特征在于，所述第二业务切换模块具体包括：
    第三网元获取单元，用于获取增益最大的光纤对应的第三网元；所述第三网元为所述第i个长链上与所述增益最大的光纤连接的网元；
    第二业务切换单元，用于将经过所述第三网元与第四网元之间光纤的业务切换至所述增益最大的光纤上；所述第四网元为所述第三网元向交叉网元方向进行业务传输的下一跳网元。
PCT/CN2021/122566 2020-11-05 2021-10-08 基于分组传送网ptn的接入层设备成环优化方法及系统 WO2022095657A1 (zh)

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