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Method for combining multi-section protection and mesh network recovery

A technology of multiplex section protection and multiplex section, which is applied in data switching networks, digital transmission systems, electrical components, etc., and can solve the problems of unprotected services and unprotected services/circuits.

Inactive Publication Date: 2007-08-22
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the linear multiplex section protection mode, if the working link and the protection link fail at the same time, the service cannot be protected
In the two-fiber bidirectional multiplex section sharing ring protection mode, if two failures occur on the ring network, some services / circuits will not be protected

Method used

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  • Method for combining multi-section protection and mesh network recovery
  • Method for combining multi-section protection and mesh network recovery

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Embodiment Construction

[0047] The specific implementation of the method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] After a linear multiplex section protection group or a two-fiber bidirectional multiplex section sharing protection ring is configured on an ASON network, and a unique protection group identifier is configured, LMP associates the protection attributes and protection group identifiers as link attributes to the corresponding link Then, the traffic engineering link is sent to the routing protocol in the form of traffic engineering link. The routing protocol then floods the traffic engineering link and the attributes of the traffic engineering link in the entire network, and finally the topology of the entire network converges. The above are the common steps adopted by the method of the present invention, so they will not be repeated in the description of specific embodiments.

[0049] Fig. 1 shows a combined embodiment...

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Abstract

This invention relates to a service / circuit protection and a recovery method by combining multiplex section protection and mesh recovery in an automatic exchange optical network, which is suitable for the combination of a linear multiplex section protection and a protection of two-fiber two-way multiplex section, shared protection ring and recovery of the mesh. In this method, the service / circuit are first automatically protected by the multiplex section protection method, that is to say applying linear multiplex section protection or two-fiber two-way multiplex section protection ring, when the multiplex section protection is unable to continue, the mesh recovery is started at once.

Description

technical field [0001] The technical field of the present invention is a method for combining service / circuit protection and restoration in an automatic switching optical network, and specifically relates to a method for combining multiplex section protection and mesh network (Mesh) restoration for a service / circuit in an automatic switching optical network method. Background technique [0002] With the demand for flexibility in service scheduling in optical networks, Automatically Switched Optical Networks (ASON, Automatically Switched Optical Network) emerged as the times require. The automatic switched optical network can be implemented based on Synchronous Digital Hierarchy (SDH, Synchronous Digital Hierarchy) or Optical Transport Network (OTN, Optical Transport Network), and supports three connection modes: permanent connection, soft permanent connection and switched connection. [0003] Another advantage of the ASON network is that it can provide Mesh network recovery...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24
Inventor 魏学勤
Owner FENGHUO COMM SCI & TECH CO LTD