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Notification method and system for shared grid protection

A notification and grid technology, applied in the field of network communication, which can solve problems such as preemption, loss, and low service data

Active Publication Date: 2017-06-27
NANTONG LANXIN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When W1 fails, the traffic on W1 will be switched to P1 for transmission. If W2 also fails during the failure of W1, it will lead to the preemption of shared resources between P1 and P2, resulting in a lower priority. business data loss

Method used

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  • Notification method and system for shared grid protection
  • Notification method and system for shared grid protection
  • Notification method and system for shared grid protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] like image 3 As shown, W1 is the first working path, the first protection path P1 is the protection path of W1, W2 is the second working path, and the second protection path P2 is the protection path of W2; the path passed by P1 is A-E-F-B, and the path passed by P2 For C-E-F-D, both P1 and P2 pass through the path E-F, and share resources on E-F according to the SE style, that is, reserve resources according to the maximum bandwidth requested by P1 and P2.

[0060] Before W1 fails, image 3 The interaction process of nodes includes:

[0061] Step 1, the head node A of the first working path initiates the signaling process of the protection path P1, and the Path message sent by A carries the notification request object, which carries the record routing object and the protection object.

[0062] Step 2: After B receives the Path message, it returns to A with a Resv message as a response. The Resv message carries the RRO object, which is used to record the path passed ...

Embodiment 2

[0066] like image 3 As shown, when the first working path A-B fails, after A detects the failure, it performs traffic switching and refreshes the Path message of the first protection path, which further includes the following steps:

[0067] In step 1, the flag bit "O" in the protected object in the Path message is set to 1, indicating that the first working path has already performed traffic switching.

[0068] Step 2: After the shared start node E receives the Path message with the flag bit "O" set to 1, if the flag bit "O" in the protected object stored locally is 0, then compare the protection paths in the shared protection group priority, ie image 3 In the priority of P1 and P2, if the priority of P2 is lower, send a notify message to notify the first node C of P2, and the error type of the notify message is Notify Error / resource occupied by high priority; if the priority of P2 is higher, then Send a notify message to notify the first node C of P2, and the error type ...

Embodiment 3

[0073] like image 3 As shown, after the fault of the first working path A-B is eliminated, it is necessary to switch back the traffic, that is, to switch the traffic on the protection path back to the working path, which specifically includes the following steps:

[0074] Step 1: After the first working path W1 recovers, if it is a unidirectional LSP, only the head node A will switch the traffic back to W; if it is a bidirectional LSP, A and B will switch the traffic back to W1 at the same time.

[0075] Step 2: After the traffic is switched back, point A refreshes the Path message on the first protection path, wherein the flag "O" in the protection object is set to 0, indicating that the traffic has been switched back.

[0076] Step 3: After the sharing start node E receives the Path message, it compares the flag bit "O" in the protected object with the flag bit "O" in the locally saved protected object, if the flag bit "O" changes from 1 to If it is 0, a notify message is ...

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PUM

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Abstract

The invention discloses a notification method for shared grid protection, which includes: when the first working path fails, switching the flow to the first protection path, and the head node of the first protection path refreshes the path (Path) of the first protection path message; after receiving the refreshed Path message, the sharing starting node compares the priorities of the first protection path and other protection paths of shared resources, and sends the protection path status to the head node of the corresponding protection path according to the comparison result; After the path state is protected, the head nodes of other protection paths perform corresponding protection processing according to the protection path state and local policies; the present invention also provides a notification system for shared grid protection. According to the technical solution of the present invention, the endpoint of the protection path can obtain the state of the shared resources in the protection path, and can perform reasonable protection processing according to the state.

Description

technical field [0001] The invention relates to network communication technology, in particular to a notification method and system for shared mesh protection in a mesh (MESH) network. Background technique [0002] Network protection is an important feature of telecommunication networks. In the prior art, the implementation of protection usually pre-establishes a protection path disjoint with the working path, and switches the working traffic to the protection path when the working path fails. The existing end-to-end protection mechanism is usually 1+1 protection or 1:1 protection, that is, a protection LSP with exclusive bandwidth is established for each working Label Switching Path (LSP, LabelSwitching Path), so that the required protection bandwidth on one path It is the sum of bandwidths of all protection LSPs passing through the path, so a large amount of bandwidth resources will be occupied, and these bandwidth resources cannot be used for services. [0003] In fact,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/04H04W84/18
Inventor 何文娟
Owner NANTONG LANXIN ELECTRONICS TECH