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Method for sharing protection in optical transmission network, first node device and system thereof

A node equipment, shared protection technology, applied in the field of communication, can solve the problem of slowing down the service switching speed and so on

Active Publication Date: 2013-06-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: in the prior art, when the optical fiber is broken, the services in a large number of protection groups are switched by cross-bridge one by one, and the services are processed serially, so that the service switching slow down

Method used

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  • Method for sharing protection in optical transmission network, first node device and system thereof
  • Method for sharing protection in optical transmission network, first node device and system thereof
  • Method for sharing protection in optical transmission network, first node device and system thereof

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Experimental program
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Embodiment 1

[0028] refer to figure 2 , figure 2 It is a flowchart of an embodiment of a shared protection method in an optical transport network provided by Embodiment 1 of the present invention; in this embodiment, the high-order (HO, High Order) ODUk1 and the low-order (LO, Low Order) ODUk2 are relative In terms of high-order ODUk1, it refers to the ODUk that is directly encapsulated into OTUk (Optical channel Transport Unit of levelk, k-order optical channel transmission unit) / OCh (Optical Channel, optical channel) and transmitted through the upper fiber. Currently, it may be ODU4 ,ODU3,ODU2,ODU1. Low-order ODUk2 refers to the ODUk that directly encapsulates certain customer signals. Currently, it may be ODU4, ODU3, ODU2, ODU1, ODU0, ODU2e, and ODUflex. Except ODU2e and ODUflex in low-order ODUk2, k1 in high-order ODUk1 is always greater than or equal to k2 in low-order ODUk2; the structure of ODUk shared protection ring in this embodiment can refer to figure 1 .

[0029] The met...

Embodiment 2

[0034] refer to image 3 , image 3 It is a flowchart of an embodiment of a shared protection method in an optical transport network provided in Embodiment 2 of the present invention; the structure of the ODUk shared protection ring in this embodiment can refer to figure 1 .

[0035] The method for sharing protection in the optical transport network includes:

[0036] S201: The network management presets the high-order ODUk1 group of the ODUk shared protection ring.

[0037] In the ODUk shared protection ring of the OTN, the network management sets the grouping settings for the high-order ODUk1 in the ODUk shared protection ring, as follows:

[0038] In the span between any two adjacent node devices in the ODUk shared protection ring, the network management divides the high-order ODUk1s that are transmitted by the same fiber and have the same path from the source node device to the sink node device into a group, and generate N A high-order ODUk1 subgroup, where N is the numb...

Embodiment 3

[0112] refer to Figure 5 , Figure 5 It is a schematic diagram of the first structure of a node device embodiment provided in Embodiment 3 of the present invention. The node device is a node device that detects a failure among the node devices forming the k-level optical channel data unit ODUk shared protection ring, including :

[0113] Obtaining module 501, configured to obtain fault information.

[0114] A judging processing module 502, configured to judge whether the fault information belongs to a preset switching condition of a high-order ODUk1 group, and if so, obtain first information according to the fault information, and send the first information to the ODUk shares other node devices in the protection ring, so that the other node devices implement group switching for interrupting services according to the first information; if not, obtain second information according to the fault information, and store the second information respectively sent to the other node d...

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Abstract

An embodiment of the invention provides a method for sharing protection in an optical transmission network, a first node device and a system thereof, which relates to the technical field of communication. The method for sharing protection in the optical transmission network comprises the following steps: acquiring failure information by a first node device, wherein the first node device is the node device which detects failure; determining whether the failure information satisifies a conversion condition of a preset high-grade ODUk1 group by the first node device, and if yes, acquiring the first information according to the failure information, respectively transmitting the first information to other node devices in an ODUk sharing protection ring for causing other node devices to realize group conversion of suspended business according to the first information; and if not, acquiring second information by the first node device according to the fault information, respectively transmitting the second information to other node devices for causing other node devices to realize individual conversion of the suspended business. The method, the first node device and the system provided by the invention realize speed of business conversion.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a shared protection method, first node equipment and system in an optical transport network. Background technique [0002] OTN (Optical Transport Network) is a new optical transmission technology developed from SONET (Synchronous Optical Network) / SDH (Synchronous Digital Hierarchy) technology. With the development of OTN, people began to adopt various OTN protection methods to effectively improve the survivability of services; among them, the OTN protection method includes ODUk (Optical Data Unit of levelk, k order optical data unit) shared protection ring, and k represents the level , the current standardized levels are 0, 1, 2, 3, 4. [0003] The structure of the existing ODUk shared protection ring is as follows: figure 1 as shown, figure 1 Among them, six node devices (node ​​device A, node device B, node device C, node device D, node device E, and node device F) fo...

Claims

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Application Information

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IPC IPC(8): H04B10/032H04L12/713H04L45/586
CPCH04B10/07H04Q11/0062H04J3/14H04Q2011/0081H04Q2011/0092H04L12/437
Inventor 阎君
Owner HUAWEI TECH CO LTD
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