Cross-equipment link protection method and system

A protection system and cross-device technology, applied in the field of cross-device link protection methods and systems, can solve problems such as protection, link protection, and single-device protection

Inactive Publication Date: 2011-04-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are mainly the following problems in the existing technology: the MSP currently implemented is for the protection of a single device, and it cannot play the role of link protection for the three-network element environment of the network
Similarly, in a four-network environment, the traditional multiplex section protection cannot play the role of link protection.

Method used

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  • Cross-equipment link protection method and system
  • Cross-equipment link protection method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0074] The cross-device link protection system provided in this embodiment is composed of two network elements: a master device where a working link is located, and a backup device where a protection link is located. The master device and the backup device together form a protection group.

[0075] Due to the cross-device multiplex section protection of the present invention, the working link and the protection link are not on the same device, so the device where the working link is located is defined as the master device, the port connected to the link is the master port, and the device where the protection link is located The device is defined as the standby device, and the port connected to the link is the standby port.

[0076] The following uses a single network element as an example to illustrate the system framework of this embodiment, such as image 3 As shown, the master device of this embodiment includes the following modules:

[0077] The master local status modul...

Embodiment 2

[0096] Such as Figure 5 As shown in FIG. 2 , it is a schematic diagram of the processing flow of the cross-device link protection method according to the embodiment of the present invention. The specific process is described as follows:

[0097] Step S501, the inter-device link protection system receives an event trigger condition, for example Figure 4 The indicated link failure is either a manual command configured by the user or a received Figure 4 K1 and K2 bytes of middle node S1 (K bytes will only be received on the protection link, therefore, after receiving the K value information, directly make a decision on the standby device, and notify the master device for synchronization after the switching result is generated ), at this time, the process of cross-device multiplex section protection will be triggered, and then step S502 will be entered.

[0098] Step S502, after receiving various events, the decision-making module first compares the priority of the events, a...

Embodiment 3

[0109] In another embodiment of the present invention, as Figure 6 As shown, the network is composed of nodes S1, S2, S3 and S4, and Link1 and Link2 are SDH links. Cross-device multiplex section protection groups are respectively established on nodes S1 and S2, and nodes S3 and S4, and Ethernet communication links are established between S1 and S2, and between S3 and S4.

[0110] If Link1 is set as the working link, when Link1 fails, nodes S1 and S3 detect the link failure and notify the local status module. Since they are both master devices, they send alarm messages to the backup devices, namely nodes S2 and S3 respectively. S4; after receiving the alarm, nodes S2 and S4 respectively enter the decision-making module for processing to generate a new protection group state and effective path, that is, switch to the protection path Link2; finally, the communication modules of nodes S2 and S4 notify them of protection The master devices in the group, namely S1 and S3, perform ...

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Abstract

The invention discloses a cross-equipment link protection method and a cross-equipment link protection system. The system comprises a protective group formed by master equipment in which an operating link is positioned and spare equipment in which a protective link is positioned, wherein the master equipment is used for sending switching decision information to the spare equipment; and the spare equipment is used for making decision according to the received switching decision information and sending synchronous notification to the master equipment according to a switch result of the decision. By the method and the system, networking of three network elements and four network elements can be subjected to the protection of a multiplexing section of cross equipment, so that the protective link protects the operating link.

Description

technical field [0001] The invention relates to the technical field of multiplex section protection switching, in particular to a cross-device link protection method and system. Background technique [0002] One of the important reasons why Synchronous Digital Hierarchy (SDH) technology can achieve rapid development and be widely used, and can be adopted as a middle layer protocol in optical transmission systems is its self-healing protection function. In various networking protections, multiplex section protection (Multiplex Section Protection, MSP for short) is an efficient protection means, and is also one of the most important protection means in today's optical transmission systems. [0003] In its G.841 recommendation, the International Telecommunication Union-Telecommunication Standardization Sector (International Telecommunication Union-Telecommunication Standardization Sector, referred to as ITU-T) clearly defines the multiplex section protection switching protocol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04J14/02
CPCH04L41/0663H04L45/00
Inventor 郝红杰
Owner ZTE CORP
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