Networking method of metro backbone optical transmission network (OTN)

Abstract

The invention provides a networking method of a metro backbone optical transmission network (OTN). The method comprises the steps of dividing a convergence layer area outside a core layer of the target metro OTN into a plurality of sub-areas according to a coordinate axis, wherein the core layer comprises a plurality of core nodes which bear a communication service, each sub-area is connected witha core layer through two core nodes, establishing the Q-MESH of each sub-area around the two core nodes; performing city-leaving-direction separation and route regrouping on the two core nodes in each sub-area according to the coordinate axis; setting for making the Q-MESH of each sub-area perform route selection according to a preset route algorithm; and accessing the Q-MESH by double nodes of PTN equipment. The networking method can realize networking structure matching between OTN and PTN and furthermore realizes advantages of realizing quick accessing and capacity expansion of the PTN service, reducing capacity expansion cost, preventing a potential hazard of concealed same route, reducing fault influence and improving network safety.

Description

technical field [0001] The invention relates to the field of transmission network technology, in particular to an OTN networking method for a metro backbone transmission network. Background technique [0002] At present, multiple 80*10Gb / s core layer optical transport network OTN systems and multiple convergence layer 80*10Gb / s metro OTN systems have been built in the metropolitan backbone transport networks of various cities for synchronous digital system SDH / The transmission requirements of large-grained services such as packet transport network PTN and other transmission systems, IP over OTN systems, and customer collection. The OTN network of the metro backbone transport network is mainly a ring network structure, and the network is formed according to the actual geographical routing situation. For example, if figure 1 The OTN network structure of Chifeng Company shown in the figure is based on the actual geographical routing situation. Basically, every 2-4 counties f...

AI Technical Summary

Problems solved by technology

[0009] In order to solve the above-mentioned technical problems, the present invention provides an OTN networking method for the metropolitan backbone transport network, which can solve the mismatch between the PTN network and the OTN network in the existing metropolitan backbone transport network and the gradual increase of the aggregation nodes. The large ring structure with double breakpoints on the same ring is prone to occur, the existing OTN independent ring cannot meet the fast access and bandwidth expansion of PTN nodes, and hidden co-routing and other problems

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