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A method and system for controlling crossover in a transmission network

A network and unified technology, applied in the field of network transmission, to achieve the effect of improving accuracy and avoiding cross-conflict

Active Publication Date: 2018-06-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Specifically, assuming that a service with reply has three ports at the tail node, there are two work recovery routes. When the work connection fails (the first work port fails), the second port can be selected to establish work recovery through recovery. Connection (recovery route 1), when the second port fails again, you can continue to select the third port to establish a working recovery connection (recovery route 2), if all three ports fail, under normal circumstances, the tail node It should receive the signaling notification of deleting the recovery connection and switching the crossover to the working connection. However, since the signaling channel to the tail node may also be interrupted, the tail node probably did not receive the above signaling notification and did not switch the crossover to the working connection. Switching to the working recovery connection, if the failure of the first working port of the subsequent tail node disappears (that is, the working connection returns to normal), then because the connection on the tail node is not crossed on the working connection, the service due to crossing interrupted by error
[0004] Therefore, crossover control is a very important and key functional operation in the transport network, and there is no very good mechanism and method for controlling crossover in existing solutions

Method used

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  • A method and system for controlling crossover in a transmission network

Examples

Experimental program
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Effect test

example 1

[0078] Assume that the cross attribute parameter (Current Path Indication, CPI) of the working connection of service 1 (path 1) is 2, and there are only working connections. The connection is assigned an odd CPI, and the methods of controlling the crossover include:

[0079] Step 11, the head node of service 1 knows that the working connection has failed through signaling, and decides to restore the service, and then initiates the establishment of the working recovery connection; the connection type of the working recovery connection is set to use connection, so the last time The allocated even CPI (2) is incremented to 4 and assigned to the work recovery connection, that is, the CPI of the work recovery connection=4; the head node sends the work recovery connection establishment signaling to the downstream node, which carries the CPI of the work recovery connection (equal to 4);

[0080] Step 12, the intermediate node and the tail node receive the work recovery connection es...

example 2

[0083] Assuming that the CPI of the working connection of service 1 (path 1) is 3, and there are only working connections, for the crossover control under soft rerouting, an odd CPI is assigned to the used connection, and an even CPI is assigned to the non-used connection. The methods of controlling the crossover include :

[0084] Step 11, the first node of path 1 receives the soft rerouting instruction from the network management system, and then initiates the establishment of a work-optimized connection; the connection type of the work-optimized connection is set to a non-use connection, indicating that the traffic of the business should continue to go through the work connection; the first node Send work-optimized connection establishment signaling to the downstream node, which carries the CPI of the work-optimized connection (equal to 2)

[0085] Step 12, the intermediate node and the tail node receive the work-optimized connection establishment signaling, and save the CP...

example 3

[0091] Assuming that the CPI of the working connection of business 1 (path 1) with the automatic reply attribute is 3, the CPI of the working recovery connection is 5, and then the failure of the working connection disappears, and business 1 needs to start the recovery operation. The method for controlling crossover includes the following steps:

[0092] In step 11, the head node of path 1 detects that the failure of the working connection disappears. Since service 1 is an automatic recovery service, service 1 needs to switch the service flow from the working recovery connection to the working connection. The head node determines the working connection as the target connection, sets the connection type of the working connection to use connection, re-allocates an odd CPI for the working connection, and the newly allocated CPI of the working connection is 7; the head node sends a working connection attribute refresh signal to the downstream node , which carries the updated CPI of...

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PUM

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Abstract

The invention discloses a method for controlling crossover in a transport network, the method comprising: the first node of a path determines the crossover attribute parameter of the connection, carries it in a connection operation instruction and issues it to a downstream node of the path; the downstream node Save the cross attribute parameters of the connection, and perform cross control on the connection according to the cross attribute parameters of each connection on the same path. The invention can avoid the crossover conflict caused by the residual connection on the node, and improve the correct rate of connection crossover. The invention also discloses a system for controlling crossover in the transmission network.

Description

technical field [0001] The invention relates to the technical field of network transmission, in particular to a method and system for controlling crossover in a transmission network. Background technique [0002] With the gradual development of transport network from point-to-point link to mesh network (mesh) and intelligence, the intelligent control plane (Automatically Switched Optical Network ASON (Automatically Switched Optical Network) / Generalized Multiprotocol LabelSwitching)) emerged as the times require. By introducing an intelligent control plane, the transport network can provide richer functions than before. For example, it can realize the service guarantee for important services through hard rerouting, and realize the optimization of services through soft rerouting. Reply guarantees to automatically return to the original path after the fault is repaired to achieve optimal routing and reasonable utilization of resources. [0003] How to correctly control the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/703H04L12/725H04L45/28
Inventor 向小山
Owner ZTE CORP