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Method for automatically exchanging emigration based on status transition in optical network

A technology of state transition and automatic switching, applied in multiplexing system selection devices, electrical components, transmission systems, etc., can solve problems such as service interruption, label and cross-connect release, and inability to ensure robustness

Inactive Publication Date: 2008-11-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if an error occurs when processing signaling, or if there is confusion when processing signaling, the label and cross-connect will be released, so that the service is interrupted, and its robustness cannot be ensured.
[0006] To sum up, a new technical solution is currently needed to solve the problem of the robustness of mutual migration between PC and SPC

Method used

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  • Method for automatically exchanging emigration based on status transition in optical network
  • Method for automatically exchanging emigration based on status transition in optical network
  • Method for automatically exchanging emigration based on status transition in optical network

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0058] Example 1: The normal signaling process of migrating the SPC to a PC.

[0059] Such as figure 2 As shown, the normal signaling process of migrating an SPC to a PC is consistent with the signaling process of graceful connection deletion described in RFC3473. combine Figure 7 , describing the processing under this signaling flow, the operation steps are as follows:

[0060] If the Path signaling from the upstream node is received, the corresponding signaling scenario is taken out from the private data of the Path. At this time, the signaling scenario should be the migration of SPC to PC; judge the value of the migration status bit, and combine the signaling scenario, Make corresponding conversions.

[0061] At this point, different values ​​are handled as follows:

[0062] takes the value of PC migration to SPC success status, at this time, the SPC is successfully migrated from PC, and it is converted to start the migration from SPC to PC.

[0063] The value is t...

example 2

[0069] Example 2: An abnormal signaling process for migrating from an SPC to a PC.

[0070] Such as image 3 As shown, the abnormal signaling process of migrating an SPC to a PC is consistent with the signaling process of forced connection deletion described in RFC3473. Image 6 In indicates that after the first node sends Path (R&D), it does not receive the downstream PathErr within a timeout (the timeout may be due to the failure of the downstream signaling control channel or the failure of the downstream node), and sends Pathtear to the downstream to implement forced migration from SPC to PC. combine Figure 7 , taking the intermediate node as an example to describe the implementation of migrating SPC to PC under this signaling process, the operation steps are as follows:

[0071] Step 201: Receive the Pathtear signaling from the upstream node, and take out the corresponding signaling scenario from the private data of Path according to the interface provided by the protoc...

example 3

[0077] Example 3: When a PC is migrated to an SPC, a PathErr from a downstream node is received.

[0078] Such as Figure 4 As shown, when the PC is migrated to the SPC, the intermediate node fails to migrate the cross-connection after receiving the downstream Resv signaling. If it fails, it will respond to the failure of the protocol stack, thus sending Pathtear downstream and PathErr upstream.

[0079] Such as Figure 5 As shown, when the PC is migrated to the SPC, after the intermediate node sends the Path signaling, the intermediate node receives the PathErr returned by the tail node due to an error in the migration of the tail node.

[0080] combine Figure 7 , taking the middle node as an example, described in Figure 4 , Figure 5 The implementation of migrating from SPC to PC under the signaling process, the operation steps are as follows:

[0081] Step 301: Receive the PathErr message (for Figure 4 , the intermediate node is the origin of PathErr, for Figure...

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Abstract

The invention discloses a migrating method based on state transition in automatic exchange optical network, including: judging the value of a migrating status bit by setting migrating status bit in connection information field for identifying migrating operational state and combining information of signaling scene carried by standard signaling, so as to complete the mutual migrating between permanent connection and soft permanent connection. Application of the invention is smoothly compatible with the signaling deleted by general connections, does not make any changes to the signaling process. Standard RSVP-TE or CR-LDP signaling is differentiated to be deleted, or migrating SPC to PC and migrating PC to SPC according to the signaling scene values carried from the first nodes to downstream; whether the resource implementing authority is migrated or released is judged by strict state control, so as to ensure the false delete of resources after receiving delete signaling, and further to ensure that it is certainly PC after a migrating SPC to PC or migrating PC to SPC is in failure.

Description

technical field [0001] The present invention relates to the technical field of service migration in an optical communication network, in particular to an automatic switching optical network (ASON: Automatically Switched Optical Network) between a PC (Permanent Connection, Permanent Connection) and an SPC (Soft Permanent Connection, Soft Permanent Connection) The mutual migration method includes a method for improving robustness when the migration from the PC to the SPC fails and when the SPC is migrated to a PC. Background technique [0002] With the development of network technology and the substantial increase in network communication capacity, people have put forward higher requirements for the performance of the transport network: by adding automatic control protocols in the optical domain to endow the optical network with intelligent attributes, it is hoped that the network structure will be more efficient. Flexible, flexible and unified network management, higher bandw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L29/06
CPCH04Q11/0062H04Q11/0071H04Q2011/0088
Inventor 李彬
Owner ZTE CORP
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