Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network

Abstract

The invention is used for helping multi SPC services with same source and same destination to rapidly establish label-switching path, and at the same time, ensuring the label-switching establishment of said SPC services not to be failure due to insufficient resources, and to rapidly recover from the failure. The method comprises: according to the request, calculating at least one group of route passing through same nodes, and along with said group of routes, establishing one group of label-switching path once. The apparatus thereof comprises a calculation requesting module, a path calculating module and a path establishing module.

Description

technical field The invention relates to the field of optical network communication, in particular to a method and device for establishing and restoring a label switching path in an automatic switching optical network. Background technique Compared with the traditional optical transport network, the main difference of ASON (Automatic Switched Optical Network, Automatically Switched Optical Network) is to introduce the control plane on the optical transport plane, and evolve the management system of the traditional optical transport network into a management system based on the management plane and control plane. and a new multi-layer management structure for the transport plane. The control plane is one of the most important features of ASON. It uses the GMPLS protocol to establish services through SC (Switched Connection, switched connection) and SPC (Soft Permanent Connection, soft permanent connection). Through the control plane function, end-to-end or partial paths can...

AI Technical Summary

Problems solved by technology

In the process of LSP establishment, since multiple services need to be configured as one LSP, if the accumulated bandwidth of multiple services cannot be found, the LSP establishment will fail

Since multiple services are bound into one LSP, it is not conducive to separate management

When a service in the LSP fails, all services need to be recovered. At this time, if the accumulated bandwidth of multiple services cannot be found, an LSP cannot be established, resulting in recovery failure

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