WO2023015897A1 - Procédé, appareil et système de commande intelligente pour réseau optique - Google Patents

Procédé, appareil et système de commande intelligente pour réseau optique Download PDF

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Publication number
WO2023015897A1
WO2023015897A1 PCT/CN2022/082656 CN2022082656W WO2023015897A1 WO 2023015897 A1 WO2023015897 A1 WO 2023015897A1 CN 2022082656 W CN2022082656 W CN 2022082656W WO 2023015897 A1 WO2023015897 A1 WO 2023015897A1
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service
faulty
rerouting
link
network
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PCT/CN2022/082656
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English (en)
Chinese (zh)
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盛伟
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烽火通信科技股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • the invention relates to the technical field of optical communication, in particular to an optical network intelligent control method, device and system.
  • optical transport network controls the automatic protection and recovery of faulty services through an intelligent system to realize self-healing of network faults.
  • optical network services include 1+1 protection and heavy-duty Routing Restoration
  • the 1+1 protection type service is realized by adopting the redundancy of the active and standby connection paths.
  • the service flow can be quickly switched to the standby connection to realize the rapid protection of the faulty service.
  • the service protection switching time is within 50ms. Due to the backup connection redundancy protection, the utilization rate of network resources is only 50% at most, and the network cost is high.
  • Rerouting recovery type business does not occupy redundant connection network resources.
  • a business connection fails, calculate and allocate network resources, establish a rerouting connection to restore the faulty business, and rerouting and restoring shared network topological resources after network failures support multiple fault rerouting and recovery.
  • the network resource utilization rate is higher than 50%, which reduces the network cost, but the rerouting connection calculation and establishment of the faulty service takes a long time, there are multiple faulty services rerouting and restoring at the same time, the network resource allocation is not optimized, and the service recovery fails. Unsuccessful problems, compared with the 1+1 protection type, the fault service recovery performance and success rate are low.
  • the main purpose of the present invention is to provide an optical network intelligent control method, device and system, aiming to solve the technical problems in the prior art of high network cost of optical network service recovery, low failure service recovery performance and success rate.
  • an optical network intelligent control method which includes the steps: the controller analyzes the network survivability based on the whole network topology information and service connection information, obtains and sends the survivability data to the ASON control level node for storage; When the path is faulty, the source node of the faulty service in the ASON control level node establishes a rerouting connection to the faulty link according to the survival data, and reports the rerouting connection establishment result to the controller; the controller updates according to the rerouting connection establishment result The recovery state of the faulty service, re-optimize the calculation of the faulty link that failed to restore to obtain a new rerouting connection path, and send the new rerouting connection path to the source node of the faulty service to correct the failure of the recovery service recovery on the faulty link.
  • the controller analyzes the network survivability based on the topology information of the entire network and the service connection information, obtains and sends the survivability data to the ASON control level node for storage, including steps:
  • the controller traverses the network-wide topology links of the current network based on the network-wide topology information and service connection information at the current moment, and simulates the fault situation of each simulated faulty link;
  • the source node of the failure service in the ASON control node establishes a rerouting connection to the failure service link according to the survival data, including steps:
  • the ASON control leveling node extracts the faulty link information and notifies the source node of the faulty service
  • the source node of the faulty service queries the rerouting connection path of the faulty service according to the link key value stored locally, and establishes a rerouting connection to the faulty link according to the query result.
  • the controller before the controller updates the recovery state of the faulty service according to the establishment result of the rerouting connection, the controller includes the steps of:
  • the controller After receiving the faulty link information, the controller traverses the entire network to obtain all services passing through the faulty link and marks the faulty service status accordingly.
  • the controller performs re-optimization calculation on the faulty link that fails to recover to obtain a new rerouting connection path, including steps:
  • the re-optimization calculation of the failed link to obtain a new rerouting connection path includes the steps of:
  • Optimizing calculations are performed according to the current network-wide topology and service connection information and the network conditions after the update of the faulty service recovery status so that the new rerouting connection path meets the preset priority of faulty link recovery.
  • the restoration of the service of the faulty link that failed to restore includes the steps of:
  • the source node of the faulty service After receiving the new rerouting connection path, the source node of the faulty service re-establishes a rerouting connection for the faulty link that failed to recover according to the new rerouting connection path.
  • the source node of the faulty service reports the result of re-establishing the rerouting connection to the controller
  • the controller updates the service connection information of the entire network according to the result of re-establishing the rerouting connection, and sends the updated result to the ASON control node for storage.
  • an optical network intelligent control device which includes:
  • the whole network data generation module is used to analyze the network survivability based on the whole network topology information and service connection information, obtain and send the survivability data to the ASON control leveling node for storage;
  • a failure initial recovery module which is used for when a network link failure occurs, the source node of the failure service in the ASON control level node establishes a rerouting connection to the failure link according to the survival data, and reports the rerouting connection establishment result to the controller ;
  • a fault re-restoration module which is used to update the fault service recovery status according to the establishment result of the re-routing connection, perform re-optimization calculations on the faulty link that failed to recover to obtain a new re-routing connection path, and transfer the new re-routing connection path
  • the connection path is sent to the source node of the faulty service so as to restore the service of the faulty link that fails to recover.
  • an optical network intelligent control system which includes a controller and an ASON control leveling node, and is characterized in that:
  • the controller is used to analyze network survivability based on the whole network topology information and service connection information, and obtains and sends out the survivability data to the ASON control level node for preservation;
  • the source node of the faulty service in the ASON leveling node establishes a rerouting connection to the faulty link according to the survival data, and reports the rerouting connection establishment result to the controller;
  • the controller is further configured to update the recovery state of the faulty service according to the establishment result of the rerouting connection, perform re-optimization calculation on the faulty link that fails to recover to obtain a new rerouting connection path, and send the new rerouting connection path to to the source node of the faulty service so as to restore the service of the faulty link that failed to recover.
  • the optical network intelligent control method proposed by the present invention enables the controller to analyze the network survivability based on the topology information and service connection information of the entire network, obtain and send the survivability data to the ASON control node for storage; when a network link failure occurs, the ASON control level The source node of the faulty service in the node establishes a rerouting connection to the faulty link according to the survival data, and reports the rerouting connection establishment result to the controller; the controller updates the faulty service recovery status according to the rerouting connection establishment result, Perform re-optimization calculations on the failed faulty link to obtain a new rerouting connection path, and send the new rerouting connection path to the source node of the faulty service to restore the service of the faulty link that failed to recover ;Through this process, the controller is combined with the distributed control technology of ASON control and leveling nodes to improve the performance of optical network survivability analysis and the success rate of fault service rerouting recovery; it reduces the generation time of fault service
  • FIG. 1 is a schematic flowchart of a first embodiment of an optical network intelligent control method according to the present invention
  • FIG. 2 is a schematic flowchart of a second embodiment of the optical network intelligent control method of the present invention.
  • FIG. 3 is a schematic flowchart of a third embodiment of an optical network intelligent control method according to the present invention.
  • FIG. 4 is a schematic flowchart of a fourth embodiment of an optical network intelligent control method according to the present invention.
  • FIG. 5 is an optical network topology and a service connection diagram provided by an embodiment of the present invention.
  • Figure 6 is a schematic diagram of a rerouting connection path when a link (L15) fails in the embodiment of the present invention
  • FIG. 7 is a schematic diagram of a rerouting connection path when a link (L45) fails according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a rerouting connection path when two link failures occur and a schematic diagram of a first sequential calculation rerouting connection path according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a rerouting connection path when two link failures occur and a schematic diagram of a second sequential calculation rerouting connection path according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of an optical network intelligent control device provided by an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a device structure of a hardware operating environment provided by an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of an optical network intelligent control system provided by an embodiment of the present invention.
  • the optical network intelligent control method includes the following steps:
  • Step S10 the controller analyzes the network survivability based on the topology information of the whole network and the service connection information, obtains and sends the survivability data to the ASON control and leveling node for storage.
  • the entire network topology information is the link information corresponding to the entire network topology structure
  • the service connection information is the service connection information corresponding to various services
  • the controller is based on the current network topology information and service connection information.
  • Information can analyze the network survivability, and obtain the corresponding survivability data, so as to send the survivability data to all automatic switched optical network (Automatically Switched Optical Network, ASON) control level nodes for storage.
  • ASON Automatically Switched Optical Network
  • the controller can be a centralized controller, or other types of controllers, such as a distributed controller, which is not limited in this embodiment.
  • the business connection After obtaining the business connection information, the business connection can be connected to The information is reported, and the reporting method may be to report the service connection information to the controller in the protocol format of the Path Computation Element Protocol (PCEP).
  • PCEP Path Computation Element Protocol
  • Step S20 when a network link failure occurs, the source node of the faulty service in the ASON control and leveling node establishes a rerouting connection for the faulty link according to the survival data, and reports the rerouting connection establishment result to the controller.
  • each node in the ASON leveling node stores all business information with this node as the source node, and the source node of the faulty business in the ASON leveling node refers to the source node containing the faulty business information.
  • Corresponding ASON leveling node When a network link failure occurs, the control plane of the source node of the failed service establishes a rerouting connection for the failed link according to the survival data stored locally.
  • Step S30 the controller updates the recovery state of the faulty service according to the establishment result of the rerouting connection, performs re-optimization calculation on the faulty link that fails to recover to obtain a new rerouting connection path, and sends the new rerouting connection path to to the source node of the faulty service so as to restore the service of the faulty link that failed to recover.
  • step S20 the controller directly updates the faulty service recovery status, and updates the entire network service information and the entire network topology link information according to the new link information . This indicates that in step S20, the ASON control and leveling node has completed the recovery of all faulty services.
  • the controller can perform optimization calculation based on its own network-wide optimization capability to obtain a rerouting connection path based on the current network conditions.
  • the controller is combined with the distributed control technology of the ASON control and leveling node through the above solution, which not only takes into account the powerful hardware processing capability of the controller, but also supports the optimization of computing network services based on the global vision of the entire network topology and business information.
  • the connection path can improve the survivability analysis performance of the optical network and the success rate of faulty service rerouting recovery.
  • the controller is abnormal or the DCN communication is interrupted, at least one link failure can be quickly and reliably restored through the ASON control leveling node.
  • the ASON control leveling node saves the local service preset rerouting path for network survivability analysis
  • the control leveling node queries the faulty service rerouting connection path locally for service recovery, which can reduce the generation time of the faulty service rerouting path.
  • Improve the recovery efficiency of faulty services Especially when more than one link failure occurs, the controller only needs to perform optimization calculations for the service connections that fail to be restored by the ASON control leveling node, reducing the number of faulty service connections that need to be optimized, reducing the calculation time for multi-connection rerouting path optimization, and further The network service failure recovery performance is improved, and the survivability requirements of the optical network are better met.
  • the optical network intelligent control method also includes the following steps:
  • Step S01 the controller synchronizes the network-wide topology information and service connection information from the ASON control and leveling node, establishes a network-wide topology information database according to the synchronized network-wide topology information, and establishes a service connection information database according to the synchronized service connection information.
  • the controller can synchronize the network-wide topology information and service connection information from the distributed ASON control and leveling nodes.
  • the network-wide topology information database can be established through the synchronized network-wide topology information, and the service can be established through the synchronized service connection information.
  • Connection information base; the entire network topology information base stores the entire network topology information data, and generally can provide an application program interface (Application Programming Interface, API) call interface for external function modules to perform data access; the entire network service connection information
  • API Application Programming Interface
  • the library saves the topology information data of the entire network, and provides an API call interface for external function modules to access data.
  • the cooperation process between the controller and the ASON control leveling node is as follows: the controller creates the path computation element (Path Computation Element, PCE) server interface; the control leveling node creates the PCE client interface, discovers and connects to the controller PCE server ;Exchange PCEP interface session messages, and establish a PCEP interface between the controller and the leveling node; after the PCEP interface between the leveling node and the controller is successfully established, the leveling local service control module reports all the service connections of the node to the controller, that is, the service source
  • the node is all the business connections of the node; the control and leveling business connection report message, and the PCEP protocol format is used to report the business connection information to the controller; the controller receives and saves the business connections reported by all the leveling nodes, and establishes the whole network business connection information database.
  • PCE path computation element
  • the entire network topology information base and the service connection information base are real-time updated databases
  • the current network topology information can be called from the entire network topology information base
  • the service connection The service connection information at the current moment can be called out from the information base.
  • the controller synchronizes the network-wide topology information and service connection information from the ASON control and leveling node, establishes the network-wide topology information database according to the synchronized network-wide topology information, and establishes services according to the synchronized service connection information Connection information database; it can centrally summarize the topology information and business connection information of the entire network, which speeds up the speed and efficiency of data query and call, saves the time of data processing, and ensures the rapid recovery of services after optical network link failures. It satisfies the survivability requirements of the optical network.
  • step S10 specifically includes the following steps:
  • Step S11 the controller traverses the network-wide topology links of the current network based on the current network-wide topology information and service connection information, and simulates the fault situation of each simulated faulty link.
  • the controller can analyze the network survivability based on the current network topology information and service connection information, that is, traverse the entire network topology links, thereby simulating each link failure, that is, simulating each simulated fault chain The fault condition corresponding to the road.
  • the control level node saves the received network survivability analysis message data to the local service survivability database, that is, the topology link-local service preset rerouting connection information database, and the network survivability analysis message data is used as the node
  • the link key value contained in the source node business and the corresponding preset rerouting connection path is used as the node The link key value contained in the source node business and the corresponding preset rerouting connection path.
  • Step S12 Calculate all service rerouting connection paths passing through each simulated faulty link according to the failure situation, and obtain link key values of each service rerouting connection path.
  • Step S13 using the link key value as an index and combining the preset rerouting connection data to generate survival data, and sending the survival data to the ASON control node for storage.
  • the corresponding network survival data can be generated in combination with the pre-set rerouting connection data of the entire network service, and the network survival data can be sent to all control nodes, so that through ASON The leveling node is saved.
  • the link key value can be used as an index to save it in the topology link-the whole network service preset rerouting connection information base, and at the same time, the link index and the preset rerouting connection are sent to the service source node control flat.
  • the controller traverses the network-wide topology links of the current network based on the network-wide topology information and service connection information at the current moment, and simulates the fault situation of each simulated faulty link; according to the fault Situation calculation through all the service rerouting connection paths of each simulated faulty link, and obtaining the link key value of each service rerouting connection path; using the link key value as an index combined with preset rerouting connection data to generate survival data, Send the survivability data to all ASON control nodes for storage; based on the global view of the entire network topology and service information, support the optimization of the calculation of network service connection paths, improve the performance of optical network survivability analysis and the success of rerouting and recovery of faulty services Rate.
  • step 20 the source node of the faulty service in the ASON control leveling node establishes a rerouting connection to the faulty service link according to the survival data, including steps:
  • Step S21 the ASON control leveling node extracts the faulty link information and notifies the source node of the faulty service
  • Step S22 the source node of the faulty service queries the rerouting connection path of the faulty service according to the link key stored locally, and establishes a rerouting connection to the faulty link according to the query result.
  • the ASON control leveling node extracts the failure link information from the failure service signaling notification message and then notifies the source node of the failure service to restore the service.
  • the source node of the faulty service directly finds the link key value corresponding to the faulty service from the generated data stored locally, queries the rerouting connection path corresponding to the faulty service through the link key value, and establishes a rerouting connection according to the path.
  • the controller receives the failure link information (topological link failure notification message) reported from the ASON control level node
  • the network link is displayed according to the failure link key value. Find and mark all faulty services passing through the faulty link. In order to facilitate the subsequent ASON control and leveling node to update the restored fault service status in real time after rerouting and connecting, and to grasp the real-time network link conditions in time.
  • step S30 the controller performs re-optimization calculation on the faulty link that fails to recover to obtain a new rerouting connection path, including steps:
  • Step S31 start the failure link service recovery timer, and wait for the report of the rerouting connection establishment result
  • Step S32 if the timer expires or the rerouting connection establishment results of all the faulty links have been received, it is judged whether there is a faulty link that fails to recover;
  • Step S33 if there is a faulty link that fails to restore, re-optimize calculations on the faulty link that fails to restore to obtain a new rerouting connection path.
  • the controller After the controller receives the faulty link information (topological link fault notification message) reported from the ASON control level node and marks the faulty service, it starts the faulty link service recovery timer. Its function is to Within the timer setting time, wait for the rerouting connection establishment result reported from the ASON control level node, so as to avoid affecting the system control performance due to the overtime reporting of the partial rerouting connection establishment result. Once the timer expires, stop waiting for the report of the rerouting connection establishment result, and directly judge the existing results. If all the faulty links are rerouting successfully, it means that all the faulty services are restored. If there is still a faulty link that has not been restored, the controller will perform re-optimization calculation at this time.
  • topological link fault notification message topological link fault notification message
  • the controller re-optimizes the calculation of the faulty link that fails to restore, based on the current network topology and service connection information and the network conditions after the update of the faulty service recovery status. Routed connection paths meet preset priorities for recovery of failed links. That is, at this time, the controller re-optimizes the calculation based on its own hardware processing capability and computing power, based on the current topology and service connection conditions of the entire network (possibly the network conditions after the rerouting connection through the ASON control leveling node).
  • the preset priority is the priority of the preset path optimization, and the paths that need to be optimized can be optimized according to a certain order through the preset priority, and the preset priority can be Under the current network conditions, the business recovery priority of the successfully calculated rerouting connection path is the highest, and the number of rerouting connections of the same recovery priority business successfully calculated is the largest. Of course, it can also be set as a priority determination rule for other conditions. This embodiment There is no restriction on this.
  • step S30 performing service recovery on the faulty link of the recovery failure means that the source node of the faulty service in the ASON control leveling node receives the re-optimization calculation result issued by the controller (the failure of the recovery failure After the rerouting connection path), establish a rerouting connection directly according to the path to restore the faulty service.
  • step S30 further steps are included:
  • Step S40 the source node of the faulty service reports the result of re-establishing the rerouting connection to the controller, and the controller updates the service connection information of the entire network according to the re-establishing result of the rerouting connection.
  • the ROADM optical system composed of five reconfigurable optical add-drop multiplexer (Reconfigurable Optical Add-Drop Multiplexer, ROADM) nodes NE1, NE2, NE3, NE4, NE5
  • ROADM reconfigurable Optical Add-Drop Multiplexer
  • the optical relay uses include: optical signal-to-noise ratio (OSNR) at the receiving end of the optical channel (Optical Channel, OCH) service line due to optical line loss , OSNR) damage exceeds the threshold threshold, it is necessary to use a pair of optical relay ports in the node as optical relay to eliminate optical damage; or, if the available wavelengths of the upstream and downstream links of the OCH service connection route are inconsistent, a pair of optical relay ports in the node needs to be used Realize wavelength conversion;
  • the path calculation strategy for OCH service connection establishment and rerouting connection in this example includes: ensuring the OCH optical signal quality requirements, the optical signal at the receiving end of the line side on the service path does not exceed the OSNR threshold; The minimum number of relays reduces the use of network relay resources and saves network costs; the return service rerouting connection path uses the original faulty connection and non-faulty link resources as much as possible to improve resource utilization.
  • OSNR optical signal-to-noise ratio
  • this network establishes three groups of OCH services:
  • Links L12, L15, L23, L25, L45, and L52 carry OCH services, respectively simulate the failure of each link carrying the service, analyze the network survivability, and simulate the restoration of the faulty service.
  • the rerouting connection optimization calculation process is as follows:
  • the suboptimal calculation route is NE1-L14-NE4, using CH(1- 10) Wavelength, which does not need to use network relay port resources, is selected as the rerouting connection path of LSP'16-25; when calculating the rerouting connection path of LSP'26-35, the non-faulty link L52 and wavelength resources of the original connection path are preferentially used , to calculate the route NE2-L52-NE5-L35-NE3-L34-NE4, because the rerouting path distance is too long, the optical signal damage exceeds the threshold threshold, it is necessary to use the trunk port resources on the NE3 or NE5 node to perform photoelectric and optical repair service signals , the suboptimal calculation route NE2-L12-NE1-L14-NE4, using CH(11-20) wavelength, does not use network trunk port resources, is selected as the LSP'26-35 rerouting connection path;
  • the controller After the controller generates the network survival data shown in Table 1, it is delivered to each control leveling node and stored in the local rerouting connection information database.
  • the rerouting link information stored locally when the service fails is shown in Tables 2 and 3.
  • Table 2 Rerouting connection information stored locally on NE1 node in case of service failure
  • Table 3 Rerouting connection information stored locally on NE2 node in case of service failure
  • the leveling node queries the local service fault rerouting connection according to the faulty link, and establishes a rerouting connection according to the strict routing of the path.
  • the link L15 or L45 fails respectively (ie Only one link failure occurs)
  • NE1 and NE2 respectively query the local survival data (Table 2, Table 3) and according to the saved rerouting link path, the rerouting connection can be established successfully, and the faulty service can be quickly and reliably restored .
  • the controller when the controller receives the service recovery result reported by the leveling node after all the faulty services on the L45 link, it needs to re-optimize and calculate the rerouting connection path for the service that failed to recover (LSP16-25, LSP26-30 service), and according to Different order (priority) calculation rerouting connection path, there are two business recovery results.
  • the first calculation process can refer to Figure 8. First, calculate the five rerouting connection paths of LSP'26-30, pass through the nodes NE2, NE5, NE3, and NE4, and pass through the links L52, L35, and L34, and distribute 5 pairs of trunks at NE5
  • the port converts the wavelength, and converts the 11th to 15th waves occupied on the L52 to the 26th to 30th waves on the L35 respectively, expressed as: NE2-L52(CH11-15)-NE5-L35(CH26-30)-NE3-L34 (CH26-30)-NE4, the optical damage verification on the line side of the connection path passed, and the rerouting path calculation was successful;
  • Use waves 1 to 5 to convert to waves 16 to 20 on L34 respectively expressed as: NE1-L12(CH1-5)-NE2-L52(CH1-5)-NE5-L35(CH1-5)-NE3- L34(CH16-20)-NE4, but because the optical line from NE1 to NE3 is greatly damaged, the optical signal damage verification OSNR of the receiving port of the optical line of node NE3 on the L35 link exceeds the threshold, and the calculation of the rerouting connection path fails;
  • the second calculation process can refer to Figure 9.
  • the port converts the wavelength, and converts the 11th to 15th waves occupied on the L35 to the 26th to 30th waves on the L35 respectively, expressed as: NE2-L52(CH11-15)-NE5-L35(CH11-15)-NE3-L34 (CH26-30)-NE4, the optical damage verification on the line side of the connection path passed, and the rerouting path calculation was successful;
  • the centralized controller needs and can calculate rerouting connections in different orders to obtain optimized calculation results. For example, in this example, the controller synchronizes the faulty business connection information of the entire network. Sequential traversal calculates the rerouting connection path, and selects the second sequential calculation result for service rerouting recovery, which improves the utilization rate of network resources and the success rate of failure service recovery.
  • Calculating the number of rerouting connections affects the amount of optimization calculation.
  • the control level when the topology link fails, the control level first queries the local service survivability data and reroutes and restores the faulty service, and the controller only centrally calculates and queries the rerouting connections that fail to restore, which reduces the number of rerouting connections that need to be calculated, and improves Fault service recovery performance and success rate.
  • the controller when more than one link fault occurs, the controller only calculates the business connections that fail to restore the preset rerouting, reducing the number of faulty business connections that need to be optimized for calculation, and reducing the number of faulty business connections.
  • the connection rerouting path optimizes the calculation time and improves the recovery performance of network service failures.
  • the embodiment of the present invention further provides an optical network intelligent control device.
  • the optical network intelligent control device includes:
  • the whole network data generation module 10 is used to analyze the network survivability based on the whole network topology information and service connection information, obtain and deliver the survivability data to the ASON control and leveling node for storage.
  • Fault initial recovery module 20 which is used for when a network link fault occurs, the source node of the faulty service in the ASON control node establishes a rerouting connection to the faulty link according to the survival data, and reports the rerouting connection establishment result to the control device.
  • Fault re-restoration module 30 a fault re-recovery module, which is used to update the faulty service recovery status according to the rerouting connection establishment result, perform re-optimization calculation on the faulty link that failed to restore to obtain a new rerouting connection path, and The new rerouting connection path is sent to the source node of the faulty service so as to restore the service of the faulty link that fails to recover.
  • each functional module of the optical network intelligent control device can refer to the various embodiments of the optical network intelligent control method of the present invention, and will not be repeated here.
  • an embodiment of the present invention also provides a schematic diagram of a device structure of an operating environment of an optical network intelligent control device.
  • the device may include: a processor 1001 , such as a CPU, a communication bus 1002 , a user interface 1003 , a network interface 1004 , and a memory 1005 .
  • the communication bus 1002 is used to realize connection and communication between these components.
  • the user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may include a standard wired interface and a wireless interface (such as a Wi-Fi interface).
  • the memory 1005 can be a high-speed RAM memory, or a stable memory (Non-Volatile Memory), such as a disk memory.
  • the memory 1005 may also be a storage device independent of the aforementioned processor 1001.
  • the device structure shown in FIG. 11 does not constitute a limitation to the device, and may include more or less components than shown in the figure, or combine some components, or arrange different components.
  • the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and an optical network intelligent control (operating program of an optical network intelligent control device), and the optical network intelligent control device
  • an operating program executed by the processor, the whole network data generation module 10, the fault initial recovery module 20 and the fault recovery module 30 realize their respective functions.
  • the present invention further provides an optical network intelligent control system.
  • the optical network intelligent control system includes: a controller and an ASON control node. flat node save;
  • the source node of the faulty service in the ASON leveling node establishes a rerouting connection to the faulty link according to the survival data, and reports the rerouting connection establishment result to the controller;
  • the controller is further configured to update the recovery state of the faulty service according to the establishment result of the rerouting connection, perform re-optimization calculation on the faulty link that fails to recover to obtain a new rerouting connection path, and send the new rerouting connection path to to the source node of the faulty service so as to restore the service of the faulty link that failed to recover.
  • the cooperation process between the controller and the ASON control leveling node is as follows: the controller creates the path computation element (Path Computation Element, PCE) server interface; the control leveling node creates the PCE client interface, discovers and connects to the controller PCE server ;Exchange PCEP interface session messages, and establish a PCEP interface between the controller and the control level node; after the PCEP interface between the control level node and the controller is successfully established, the control level local service control module reports all the service connections of the node to the controller, that is, the service source
  • the node is all the business connections of the node; the control and leveling business connection report message, and the PCEP protocol format is used to report the business connection information to the controller; the controller receives and saves the business connections reported by all the leveling nodes, and establishes the whole network business connection information database.
  • PCE path computation element
  • the system described in this embodiment combines the controller with the distributed control technology of ASON control and leveling nodes, which not only takes into account the powerful hardware processing capabilities of the controller, but also supports the optimization of computing network services based on the global vision of the entire network topology and business information.
  • the connection path can improve the survivability analysis performance of the optical network and the success rate of faulty service rerouting recovery.
  • the ASON control and leveling node can at least ensure a fast and reliable recovery of link failure services ;
  • the ASON control leveling node saves the local service preset rerouting path for network survivability analysis, when a network failure occurs, the control leveling node queries the faulty service rerouting connection path locally for business recovery, which can reduce the generation time of the faulty service rerouting path. Improve the recovery efficiency of faulty services.
  • the controller only needs to perform optimization calculations for the service connections that fail to be restored by the ASON control leveling node, reducing the number of faulty service connections that need to be optimized, reducing the calculation time for multi-connection rerouting path optimization, and further The network service failure recovery performance is improved, and the survivability requirements of the optical network are better met.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé, un appareil et un système de commande intelligente pour un réseau optique. Le procédé comprend les étapes suivantes : un contrôleur analyse la capacité de survie d'un réseau sur la base d'informations de topologie du réseau entier et d'informations de connexion de service, obtient des données de survie et les délivre à un nœud de plan de commande ASON en vue de leur stockage ; lorsqu'une défaillance de liaison de réseau se produit, un nœud source d'un service défaillant dans le nœud de plan de commande ASON établit une connexion de reroutage pour des liaisons défaillantes en fonction des données de survie, et rapporte un résultat d'établissement de connexion de reroutage au contrôleur ; et le contrôleur met à jour un état de récupération de service défaillant en fonction du résultat d'établissement de connexion de reroutage, effectue un calcul de réoptimisation sur une liaison défaillante qui ne parvient pas à récupérer pour obtenir un nouveau chemin de connexion de reroutage, et envoie le nouveau chemin de connexion de reroutage au nœud source du service défaillant de façon à effectuer une récupération de service sur la liaison défaillante qui ne parvient pas à récupérer. Dans la présente invention, la commande centralisée du contrôleur est combinée à une technique de commande distribuée du nœud de plan de commande ASON, de manière à améliorer efficacement la capacité de survie d'un réseau optique.
PCT/CN2022/082656 2021-08-13 2022-03-24 Procédé, appareil et système de commande intelligente pour réseau optique WO2023015897A1 (fr)

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