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Method for restoring multi-point failure service in grid network

A recovery method and service technology, applied in the field of optical transmission, can solve the problem of not being able to provide 100% service recovery after multi-point failure, and achieve the effect of convenient and flexible planning

Inactive Publication Date: 2007-04-04
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of 100% service recovery for single network segment failure or single node failure, but not 100% service recovery for multi-point failure when the Mesh protection network failure service recovery is carried out by adopting the traditional preset routing method. Shortcomings, propose a service recovery method to solve multi-point failure of Mesh network, so as to provide Mesh optical transmission network with a backup route with multi-point failure service recovery capability

Method used

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  • Method for restoring multi-point failure service in grid network
  • Method for restoring multi-point failure service in grid network
  • Method for restoring multi-point failure service in grid network

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing, the implementation of technical scheme is described in further detail:

[0028] In all legends, the direction of the arrows of the topological connection indicates the on-off status of the topological connection. In Figure 3, the arrows of the AB section indicate that A is connected to B, and the B to A is disconnected, while the arrows of the AC section indicate that A to C is bidirectionally connected.

[0029] Assume that as shown in Figure 1, a complex Mesh optical transmission network with a rate level of STM-4 (STM: Synchronoustransport module, synchronous transport module) is composed of seven network elements A-G, and network elements B-D and C-D are configured with No.1~4 , a total of 4 AU4s, and other time slots are assigned time slots.

[0030] Preset condition: assume that before applying the method of the present invention, the user has assigned these seven network elements as a protection network by other met...

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Abstract

The invention provides a rule-base composed of risk groups sharing multi-point failure and uses it in the process of recovering reserve route in Mesh network, and further gets reserve route supporting the multi-point failure service so as to make the Mesh network to have the capability of recovering multi-point failure. The provided method overcomes the drawback of traditional preset route way, which is only to provide the 100% service recovery of single network segment failure or single node failure and is not to provide the 100% service recovery of multi-point failure.

Description

technical field [0001] The invention relates to the field of optical transmission, in particular to a service recovery method for optical transmission Mesh complex networks, and in particular to a recovery method for implementing multi-point failure services in the Mesh network. Background technique [0002] Optical transmission networks, including WDM, SDH, SONET and other transmission networks, have been widely used in the field of telecommunications. At the same time, the multiplex section protection ring and linear link multiplex section protection suggested by ITU-TG. It is also widely used in practice, but these methods are not very suitable for complex networks such as Mesh networks (that is, mesh networks). [0003] For the mesh network, the recovery method of preset routing or dynamic routing is generally used at present. For the recovery method of preset routing, it can only provide a 100% service recovery guarantee for a single node or a single network segment fai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/28
Inventor 涂晓平
Owner ZTE CORP