Method and device for route finding and wavelength assignment in optical network

Abstract

The invention provides a method and a device for route finding and wavelength assignment in an optical network, wherein, the method comprises the topology step of obtaining a topology network of the optical network; the route calculation step of calculating at least one route and predetermining a head node and a tail node of the routes, wherein, at least one route is one part of all the routes from the head node to the tail node; and the determination step of selecting the route as the working route when attribution information of a link of each node on the route is determined to be in line with predetermined constraint conditions and finishing or returning to the route calculation step when the attribution information is determined to be not in line with the predetermined constraint conditions. The embodiment of the invention can carry out the wavelength assignment after effectively calculating out a plurality of routes which meet the predetermined constraint conditions without the need of calculating out all the routes, thereby improving the hit rate of the available routes and reducing a large amount of data generated by calculating the routes.

Description

technical field [0001] The invention relates to optical network technology, in particular to a method and device for finding routes and wavelength allocation in an optical network. Background technique [0002] With the development of Generalized Multiprotocol Label Switching (GMPLS) technology, automated Wavelength-Division Multiplexing (WDM, Wavelength-Division Multiplexing) transport networks are gradually being widely used in the field of communication technologies. In the optical network: 1) Optical Add-Drop Multiplexing (OADM, Optical Add-Drop Multiplex) can insert a given wavelength into the fiber, or remove it from the fiber; 2) wavelength routing can route the wavelength of the input fiber to the output Optical fiber; 3) Wavelength conversion (WC, Wavelength Conversion) can convert one wavelength into another wavelength, whether the wavelength conversion capability will affect the solution to the problem of computing routing and wavelength assignment (RWA, Routing a...

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: in the prior art, the two processes of routing R and wavelength allocation WA are usually separated and processed separately, which will lead to the calculated route Does not meet the constraints of wavelength allocation, that is, it may need to perform multiple routing calculations before the wavelength allocation hits the required working route

Images