Optical network service fault recovery method and system

A business failure and optical network technology, applied in the field of optical communication, can solve problems such as the availability of calculation results and the contradiction between calculation efficiency, and achieve the effects of eliminating resource allocation conflicts, improving calculation efficiency, and efficient and reliable recovery

Active Publication Date: 2021-06-29
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention solves the problem of the contradiction between the usability of the calculation results and the calculation efficiency when the distributed control plane technology or the centralized controller technology is used alone.

Method used

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  • Optical network service fault recovery method and system
  • Optical network service fault recovery method and system
  • Optical network service fault recovery method and system

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Experimental program
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Embodiment 1

[0034] In the process of optical communication, in order to reduce the impact of network link or network node failure on the business, the optical network intelligent control system supports the automatic establishment of the end-to-end path of the business and the automatic recovery of the rerouting of the faulty connection. According to the transmission network topology automatic discovery protocol ITU-T G.7714.1, the optical network control system can automatically discover links, and establish a network-wide topology information database (Traffic Engineer Database, abbreviated as TE) based on Traffic Engineer (abbreviated as: TE) for TED). When the control system receives an end-to-end service connection establishment request, or receives a fault alarm that triggers the end-to-end rerouting recovery of the service connection, the control system will calculate the end-to-end connection path based on the entire network topology information database, and allocate transmission ...

Embodiment 2

[0089] Based on the method for recovering optical network service failures provided in Embodiment 1, in a specific implementation scenario, specific applications can be implemented through the following procedures to control the rerouting connection recovery of multiple failed services.

[0090] Such as Figure 5 As shown in , it is a network topology diagram when the network link used in this embodiment does not fail. The network topology diagram includes five Reconfigurable Optical Add-Drop Multiplexer (Reconfigurable Optical Add-Drop Multiplexer, abbreviated as: ROADM) nodes NE1-NE5, and eight links (the two numbers in the link label of this embodiment respectively represent the chain node numbers at both ends of the path) and five service LSP1-LSP5 with rerouting protection recovery type. Among them, the name of each service connection includes the routing node number and occupied optical channel, such as LSP4 (1-2-5, CH3), indicating that the service connection sequence ...

Embodiment 3

[0102]On the basis of the methods for recovering optical network service failures provided in Embodiment 1 and Embodiment 2, this embodiment further provides a system for recovering optical network service failures. It includes a centralized controller subsystem 1 and at least one distributed level control node subsystem 2, and the centralized controller subsystem 1 and each distributed level control node subsystem 2 perform message interaction through the PCEP interface. Among them, the centralized controller subsystem 1 is a PCEP server, and each distributed control leveling node subsystem 2 is a PCEP client, which jointly completes the correspondence between the centralized controller and the distributed leveling node in Embodiment 1 and Embodiment 2. The optical network service fault recovery function.

[0103] Such as Figure 7 Shown is the system structure diagram provided by this embodiment.

[0104] The centralized controller subsystem 1 mainly completes the function...

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Abstract

The invention relates to the field of optical communication, in particular to an optical network service fault recovery method and system. The method comprises the following steps: enabling a centralized controller to synchronously establish a whole-network topology information base and a whole-network service connection information base according to whole-network topology information and service connection information reported by all distributed control level nodes in a network; receiving network fault link information report, and determining a calculation type of rerouting according to a fault service type; enabling the centralized controller to generate a rerouting connection path calculation task corresponding to each fault service, enabling the centralized controller to distribute the calculation task to the centralized controller or the distributed control level node for processing according to the calculation type of the rerouting, and enabling the centralized controller to send a rerouting path to the control level node according to a calculation result; and updating the whole network topology information base and the whole network service connection information base according to the rerouted connection state. The reconnection path calculation efficiency is improved, the path resource allocation conflict is eliminated, and an efficient and reliable optical network fault service recovery method is provided.

Description

【Technical field】 [0001] The invention relates to the field of optical communication, in particular to a method and system for recovering an optical network service failure. 【Background technique】 [0002] In the application of optical communication networks, in order to ensure the stability of communication, when a network link or network node fails, multiple services passing through the fault point need to restore the connection as soon as possible to reduce the loss of service traffic. [0003] The fault recovery of the current optical network intelligent system usually uses two control technologies: the first is based on the distributed control plane technology of Automatic Switching Optical Network (ASON), which is controlled by different fault services. The planes respectively calculate the rerouting connection paths in parallel, which can realize the rapid recovery of some faulty services. However, because the control level of different faulty service source nodes is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/032H04B10/038
CPCH04B10/032H04B10/038
Inventor 盛伟
Owner FENGHUO COMM SCI & TECH CO LTD
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