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Method and system for restoring 1+1 rerouting channel inheritance selection in optical layer in wson

A routing and channel technology, which is applied to the field of 1+1 re-routing channel inheritance selection in optical layer restoration in WSON, to achieve the effect of reducing actions and system stability

Active Publication Date: 2019-10-25
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] (3) Wavelength protection recovery: support anti-multipoint failure, can provide OCH1+1 / 1:N protection and permanent 1+1 protection, etc., meet the 50ms switching requirements, and can realize wavelength dynamic / preset rerouting recovery function, but currently Recovery time can be achieved in seconds
[0015] However, in the WSON network, there is a problem in restoring 1+1 protection: since the optical layer 1+1 is not in the form of concurrent selective reception, the main channel and the backup channel are two independent optical channels, so the main channel When the backup channel is interrupted at the same time for rerouting recovery, which channel's wavelength is used for path calculation and recovery by the new rerouting channel, there is a problem of how to choose

Method used

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  • Method and system for restoring 1+1 rerouting channel inheritance selection in optical layer in wson

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Effect test

Embodiment 1

[0042] see figure 1 As shown, Embodiment 1 of the present invention provides a method for restoring 1+1 rerouting channel inheritance selection at the optical layer in WSON, including the following steps:

[0043] In the restoration of 1+1 protection mode, when both the active channel and the standby channel are interrupted, it is judged whether the active and standby channels have the wavelength conversion function;

[0044] If the active and standby channels do not have the wavelength conversion function, use the active line disk and wavelength for routing calculation, and if the calculation fails, use the backup line disk and wavelength for routing calculation;

[0045] If the active and standby channels have the wavelength conversion function, use the line plate and wavelength of the last faulty channel for rerouting recovery. If the rerouting recovery fails, perform wavelength conversion and use the same line plate to change the wavelength for rerouting recovery.

[0046...

Embodiment 2

[0052] On the basis of Embodiment 1, if the active and standby channels do not have the wavelength conversion function, when using the active line disk and the wavelength for routing calculation, the method for restoring the 1+1 rerouting channel inheritance selection at the optical layer in WSON also includes the following steps:

[0053] If the calculation fails, retry M times, and M is a positive integer; after M failed retries, use the backup line board and wavelength for routing calculation. M is preferably 10.

[0054] For example, the main channel of a service is line disk 1 and wavelength 1, and the backup channel is line disk 2 and wavelength 2. When both the main channel and the backup channel are interrupted, the control plane uses the resources of line disk 1 and wavelength 1 for routing. recover. When the available path cannot be calculated, try to calculate the route again: When deleting the route calculation for the first service recovery, if the calculation fa...

Embodiment 3

[0056] On the basis of Embodiment 1, the method for restoring 1+1 rerouting channel inheritance selection at the optical layer in WSON also includes the following steps:

[0057] After the line panel and wavelength selection are completed, a follow-up channel is established to complete the establishment of the rerouting channel.

[0058] After the line disk and wavelength selection are completed, follow-up channel establishment process is carried out. This channel establishment process is a conventional control plane SPC (Soft Permanent Connection, soft permanent connection) service establishment process, and all involved channels are optically established after calculating available routes. The cross download makes the business normal and completes the establishment of the rerouting channel.

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Abstract

The invention discloses a method and a system for inheriting and selecting a 1+1 rerouting channel for restoring an optical layer in a WSON, and relates to the field of intelligent optical switching networks. The method comprises the following steps: in restoring the 1+1 protection mode, when both the active channel and the standby channel are interrupted, it is judged whether the active and standby channels have the wavelength conversion function; if the active and standby channels do not have the wavelength conversion function, the active line is used If the calculation fails, use the backup line disk and wavelength for routing calculation; if the active and standby channels have the wavelength conversion function, use the line disk and wavelength of the last faulty channel to perform rerouting recovery. If the rerouting recovery If it fails, perform wavelength conversion, use the same line panel, and change the wavelength for rerouting recovery. The invention can reasonably select the rerouting channel according to the actual situation.

Description

technical field [0001] The invention relates to the field of intelligent optical switching networks, in particular to a method and system for inheriting and selecting 1+1 rerouting channels for optical layer recovery in WSON. Background technique [0002] ASON (Automatically Switched Optical Network, Automatically Switched Optical Network) has the function of multiple rerouting recovery, so it can break the limitation of traditional WDM equipment that can only perform 1+1 protection once, and provide the network with multiple resistance to fiber interruption and automatic recovery Therefore, ASON technology is getting more and more attention and favor from operators. [0003] Since the rerouting of the control plane is restored by soft handover, the service recovery time is much slower than that of traditional hardware protection, and cannot meet the service recovery time of less than 50ms proposed by many customers. Therefore, the rerouting recovery of the control plane in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/032H04B10/038H04L12/703H04L12/707H04L45/24H04L45/28
CPCH04B10/032H04B10/038H04L45/22H04L45/28
Inventor 左为
Owner FENGHUO COMM SCI & TECH CO LTD
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