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Service protection method and service protection device based on automatically-switched optical network

An automatic switching and service protection technology, applied in the field of optical communication, can solve problems such as wasting network resources, affecting service interruption time, and network oscillation

Inactive Publication Date: 2013-07-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the recovery time is often longer than the protection switching time, it will affect the service interruption time and cause network shocks
At the same time, there is a certain "uncertainty" in adopting the dynamic rerouting recovery method, which affects the reliability of the network
[0006] Method 2, if the number of protected connections is increased, network resources are bound to be wasted

Method used

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  • Service protection method and service protection device based on automatically-switched optical network
  • Service protection method and service protection device based on automatically-switched optical network
  • Service protection method and service protection device based on automatically-switched optical network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment describes the processing method when the working connection fails, such as figure 1 shown, including the following steps:

[0034] Step 110, detecting that the working connection fails;

[0035] Step 120, switching the service carried on the failed working connection to the protection connection;

[0036] Step 130, after the switching action is completed, the original protection connection is in the preempted state, and a new protection connection is established.

[0037] Preferably, before establishing a new protection connection, it is detected that there is currently an idle protection connection, that is, it is detected whether the current protection group is in the "protectable" state, and it is re-established when it is judged that there is no protection connection. The reason for adding the judgment step is to take into account that if there are other faulty working connections recovering from failure, if any working connection recovers from fai...

Embodiment 2

[0043] This embodiment describes the processing method when the failed working connection recovers from failure, such as figure 2 shown, including the following steps:

[0044] Step 210, the fault of the working connection after switching disappears;

[0045] Step 220, undo switching, that is, re-switch the services carried by the protection connection to the work connection;

[0046] Step 230, judging whether there is only one protection link at present, if yes, end, if not, tear down the protection connection so that there is only one idle protection connection in the protection group, end.

[0047] Preferably, the latest established protection connection is deleted.

Embodiment 3

[0049] This embodiment describes the protection device that implements the methods of the above embodiments, such as Figure 3a As shown, the device includes a fault detection module, a protection switching module and a protection connection maintenance module, wherein:

[0050] The fault detection module is used to detect whether a fault occurs in the working connection;

[0051] The protection switching module is used to switch the service carried on the failed working connection to the current protection connection;

[0052] The protection connection maintenance module is used to establish a new protection connection after the switching of the protection switching module is completed.

[0053] Preferably, the device also includes a protection group state maintenance module, such as Figure 3b As shown, it is used to trigger the protection connection maintenance module to establish a new protection connection when it detects that there is no current idle protection connect...

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PUM

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Abstract

The invention discloses a service protection method and a service protection device based on an automatically-switched optical network. The method and the device can improve reliability and self-healing capacity of the network. The method comprises the steps of detecting that a failure of work connection occurs, and switching service borne by the failure work connection to current protection connection; and building new protection connection after switching is finished. The device comprises a failure detection module, a protection switching module, and a protection connection maintaining module. By adoption of the method and the device, a protection mechanism of permanent protection connection is arranged in a control penal protection group, and the new protection connection is built after the switching of the failure connection so that protection connection exists for utilization when a failure occurs again. Consequently, the reliability and the self-healing capacity of the network are improved.

Description

technical field [0001] The present invention relates to the field of optical communication, in particular to a service protection method and device based on Automatic Switched Optical Network (ASON for short). Background technique [0002] Automatic Switched Optical Network (ASON, Automatic Switched Optical Network) is an optical transport network that uses a control plane to complete automatic switching and connection control. The architecture of ASON is divided into three planes: transport plane, control plane, and management plane. [0003] As an operating network that provides various services to users, it must have high reliability, that is to say, the network must have strong self-healing and recovery capabilities. Once a point of failure occurs, the network should be able to quickly adopt another Routing or other protection methods, so that the business operating on it will not be affected or less affected. [0004] At the same time, unlike the traditional optical n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/032
Inventor 陈皓
Owner ZTE CORP
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