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Multi-level reuse route computation method based on G.709 and path computation apparatus

A technology of path calculation and calculation method, applied in the field of optical network transmission

Inactive Publication Date: 2015-05-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there is still the problem of introducing ODU0 and ODUflex services into the OTN network and interconnecting with the deployed network

Method used

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  • Multi-level reuse route computation method based on G.709 and path computation apparatus
  • Multi-level reuse route computation method based on G.709 and path computation apparatus
  • Multi-level reuse route computation method based on G.709 and path computation apparatus

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] like Figure 8 As shown, the PCE can see all topology information of ODU2 Network 1, ODU3 Network 2 and ODU2Network 3. The PCE obtains the multi-level multiplexing capability supported by the gateway network elements Gateway 1 and Gateway 3 through the routing protocol (OSPF-TE or IS-IS-TE) or the configuration of the management plane to the PCE.

[0095] The routing calculation method provided in this embodiment includes:

[0096] Step 101: PCC (in this embodiment, node 1) sends an end-to-end route calculation request to PCE, requesting PCE to calculate an ODU0 end-to-end service between node 1 and node 10.

[0097] Step 102: After receiving the end-to-end route calculation request, the PCE uses the obtained gateway network element multi-stage multiplexing capability information for the end-to-end route calculation.

[0098] The PCE uses the existing technology to calculate an available end-to-end route, for example, nodes 1, 3, Gateway 1, 4, 6, 7, Gateway 3, 9, and 10...

Embodiment 2

[0105] like Figure 9 As shown, the PCE can see all topology information of ODU2 Network 1, ODU3 Network 2 and ODU2Network 3. The PCE obtains the multi-stage multiplexing capability information supported by the gateway network element through the routing protocol (OSPF-TE or IS-IS-TE) or the configuration of the management plane to the PCE.

[0106] The routing calculation method in this embodiment includes:

[0107] Step 201: PCC (node ​​1) requests PCE to calculate an end-to-end service of ODU0 between nodes 1 and 10. At the same time, in the IRO (Include Route Object: Include Route Object) in the PCReq message, specify to pass through Gateway 1 and Gateway 3, and insert a HOP_ATTRIBUTE in the sub-objects of Gateway 1 and Gateway 3 respectively, specifying both gateway network elements. Use multi-level multiplexing capability: ODU0-ODU2-ODU3. Of course, different multi-level multiplexing capabilities may also be specified for different gateway network elements. Refer to ...

Embodiment 3

[0116] like Figure 10 As shown, the PCE can see all topology information of ODU2 Network 1, ODU3 Network 2 and ODU2Network 3. The PCE obtains the multi-stage multiplexing capability information supported by the gateway network element through the routing protocol (OSPF-TE or IS-IS-TE) or the configuration of the management plane to the PCE.

[0117] The routing calculation method in this embodiment includes:

[0118] Step 301: PCC (node ​​1) requests PCE to calculate an end-to-end service of ODU0 between nodes 1 and 10. At the same time, in the IRO (Include Route Object) in the PCReq message, specify to pass through Gateway 1 and Gateway 3, and insert a HOP_ATTRIBUTE in each of the Gateway 1 and Gateway3 sub-objects, specifying that the two gateway network elements cannot Use multi-level multiplexing capability: ODU0-ODU2-ODU3.

[0119] Step 302: The PCE uses the obtained gateway network element multi-level multiplexing capability constraint information, the gateway networ...

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Abstract

The present invention provides a method for calculating multiplexing routing based on G.709, which is applied to an optical transport network including gateway network elements, and the method includes: a path calculation unit acquires multi stages multiplexing capabilities supported by gateway network elements; and when receiving an end-to-end path calculation request of a path calculation client, the path calculation unit calculates the end-to-end routing according to the acquired multi stages multiplexing capabilities supported by the gateway network elements, and determines the gateway network elements passed by the end-to-end routing and the multi stages multiplexing capabilities selected for the passed gateway network elements. The method for calculating multiplexing routing and a path calculation device implement the calculation for the end-to-end multi stages multiplexing routing, and thereby lay the foundation for implementing inter-connection and inter-communication between networks.

Description

technical field [0001] The invention relates to the field of optical network transmission, in particular to a G.709-based multi-stage multiplexing route calculation method and a path calculation device in an automatic switching optical network of an optical transport network. Background technique [0002] The Optical Transport Network (OTN) is a "digital encapsulation" technology proposed in 1999 to solve the problem of large-capacity transmission of high-speed TDM (Time Division Multiplexing) signals. The OTN defined in the 2003 version can provide functions such as transmission, multiplexing, protection, and monitoring management for client layer signals. The supported client layer signals are mainly STM-N (Synchronous Transfer Mode), ATM (Asynchronous Transfer Mode) and GFP ( General framing procedure) maps supported Ethernet signals, and the defined rate levels are 2.5G, 10G and 40G. With the IP-based transmission network bearer signal and the popularization of 10G LAN ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04Q11/00
CPCH04J3/085H04J2203/0053H04L45/62H04L45/645
Inventor 付锡华张新灵
Owner ZTE CORP