Sharing meshed protection realizing method and system

A technology of shared mesh and implementation methods, applied in transmission systems, digital transmission systems, data exchange networks, etc., and can solve problems such as no protection switching scheme and no standard being formulated.

Active Publication Date: 2012-07-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Up to now, there is no standard on the signaling implementation method of shared mesh protection, so there is no scheme to realize protection switching based on the signaling content and transmission of shared mesh protection

Method used

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  • Sharing meshed protection realizing method and system
  • Sharing meshed protection realizing method and system
  • Sharing meshed protection realizing method and system

Examples

Experimental program
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Effect test

example 1

[0053] Example 1: Take the OTN network as an example to illustrate the signaling-based protection implementation scheme in the shared mesh protection. The signaling transmission mode is the in-band overhead mode, and the protocol type is the two-phase mode.

[0054] for figure 1 In the structure shown, the priority of work W1 is lower than that of work W2. Protection span PS2 failure such as figure 2 As shown, that is, node D to node E fail. The failure of the protection span PS2 only affects the protection path P1, not the protection path P2.

[0055] When the working service W2 fails, the node H as the first node sends a protection switching request, requesting to switch the working service W2 to the protection path P2, then the request signaling passes through the nodes F and E along the way, and finally reaches the nodes G and G as the tail node Judging that the request signaling is a high-priority request, first perform bridging and switching, and then send the revers...

example 2

[0060] Example 2: Taking M:N structure shared mesh protection as an example, describe the implementation scheme of protection based on signaling.

[0061] for Figure 10 In the structure shown, the priority of work W1 is higher than that of work W2. The work service W2 fails as Figure 11 shown.

[0062] The working service W1 also fails. When the protection resources are preempted by the working service W1, as in Figure 12 As shown, node C and node D will respectively notify node E and node F that the protection service is occupied by the high priority service W1. Node F will re-trigger the alarm process and switch to the protection path P3.

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PUM

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Abstract

The invention discloses a sharing meshed protection realizing method, comprising the following steps of: in sharing meshed protection, triggering a switching request by a fault detection node, and executing corresponding protection switching according to the response of a downstream node; and determining to transmit according to an appointed path by the downstream node according to the signaling content of the switching request, or responding to the request of an upstream node. The invention further discloses a sharing meshed protection realizing system, wherein a protection switching unit in the system is used for triggering the switching request by the fault detection node and executing the corresponding protection switching according to the response of the downstream node; and the downstream node is used for determining to transmit according to the appointed path according to the signaling content of the switching request or responding to the request of the upstream node. With the adoption of the method and system disclosed by the invention, the protection switching can be realized by the signaling content and transmission based on the sharing meshed protection.

Description

technical field [0001] The invention relates to a signaling-based protection switching technology for shared mesh protection, in particular to a method and system for implementing shared mesh protection when there is resource preemption and multi-span faults in the network. Background technique [0002] The network topology is becoming increasingly complex, and people's requirements for service bandwidth and performance are also increasing. Shared mesh protection has a higher bandwidth utilization rate, and its protection switching time is also better than the service recovery time of the control plane, so it is a preferred network structure. In shared mesh protection, the protection architecture can adopt 1:N or M:N or (1:1) n way of protection. The protection switching scenarios in the network are very complicated, and how to use the signaling mechanism to realize the protection switching is very important. Up to now, the standard on the signaling implementation method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/24H04L45/28
CPCH04L1/22H04L12/5689H04L45/28H04L45/22
Inventor 张媛媛富森董均罗彬安高峰
Owner ZTE CORP
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