A calculation method for allocating relay resources in optical transmission network planning

Abstract

A calculation method for allocating relay resources in optical transmission network planning, involving the field of routing planning algorithms, including: using the source node as the starting node, finding the farthest node that can establish an effective optical channel, and configuring the relay at the farthest node And allocate a wavelength to the effective optical channel, and then iterate with the farthest node as the starting node until reaching the target node; among them, the way to find the farthest node that can establish an effective optical channel is to obtain the available wavelength set of the starting node , the intersection of the available wavelength sets passing through the link between two adjacent nodes is performed sequentially, until the result is empty or the optical signal-to-noise ratio OSNR of the path from the starting node to the current node is less than the preset threshold, then backtrack to the nearest used Configure relay nodes. The present invention improves calculation efficiency without generating additional relay resources.

Description

technical field [0001] The invention relates to the field of route planning algorithms, in particular to a calculation method for allocating relay resources in optical transmission network planning. Background technique [0002] In modern communication core network, the optical transmission network composed of Wavelength Division Multiplexing (WDM) system, Optical Add-Drop Multiplexer (OADM) and Optical Cross-connect (OXC) (Optical Transport Network, OTN), which realizes flexible scheduling of large-grained and multi-type services. With the rapid development of communication technology, the OTN introduces the control plane to evolve into Automatically Switched Optical Network (ASON), realizing the intelligentization of network functions. [0003] Route and Wavelength Assignment (RWA) refers to finding a route from a source node to a sink node under a given service request, and assigning corresponding wavelengths to these routes. RWA implemented by computer program algorith...

AI Technical Summary

Problems solved by technology

If you consider minimizing the relay cost, you can traverse all node combinations and configure relays. However, when a single route passes through a large number of nodes, too many analysis situations will lead to serious calculation time consumption.

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