Cross-over end-to-end connection setting method for main apparatus protection in automatic exchange optical network

Abstract

The method includes steps: (1) source node calculates routes of satisfying constrained condition for working route and protecting route respectively; (2) first, source node initiates signaling for building working route; when signaling reaches boundary node between domains of downstream network domain, the method calculates specific routes in this network domain of working route first, then builds connections in this domain of working route; (3) after working route point to point is built successfully, the source node initiates signaling for building protecting route; when signaling reaches boundary node between domains of downstream, the method asks boundary node between domains of working route for route information in this domain of working route; after obtaining response, the method calculates specific routes in this domain of protecting route and builds connections. Route information in a domain is shielded for other domain. The invention guarantees a straightway of communication.

Description

technical field [0001] The present invention relates to a method for establishing 1+1 active / standby protection in a communication network, to be precise, relates to an automatic establishment of a cross-domain end-to-end connection for 1+1 active / standby protection in an automatic switching optical network The method belongs to the technical field of 1+1 active / standby protection in an optical communication network. Background technique [0002] With the rapid development of network services, people have put forward higher requirements for various performances of optical communication networks: it is hoped that the structure of the network will be more flexible, the management of the network will be flexible and unified, and the bandwidth will have higher utilization and higher survivability And better scalability, can provide dynamic connections and effectively support future-oriented services, so the automatic switching optical network ASON came into being. [0003] A tr...

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Problems solved by technology

However, it cannot automatically establish an end-to-end connection through signaling. Moreover, this broadcast type "1+1" active / standby protection connection is generally private to the manufacturer and can only be implemented within a single domain and cannot be established across domains.

[0008] At present, although it is possible to demonstrate the establishment of a simple cross-domain end-to-end connection, ASON's ENNI standard is not yet mature enough to automatically establish a cross-domain end-to-end connection with 1+1 active / standby protection. QoS services provide cross-domain 1+1 protection

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