Method of determining a spectral route for a given...

Details Method of determining a spectral route for a given... Method of determining a spectral route for a given...

H - Electricity

04

J

H04J 14/02 (2006.01) H04L 12/56 (2006.01) H04Q 11/00 (2006.01)

Patent

CA 2474644

The invention relates to a method of determining a spectral route for a given connection in an optical telecommunication network (T) between a start node (ON1) and an end node (ON6) of said network. The inventive method consists in: using a standard routing method to determine one or more spatial candidate routes (Route 1, Route 2) which connect the start node (ON1) and the end node (ON6), whereby each spatial candidate route (i) comprises a series of route segments, which each link two network nodes directly, and (ii) can support several spectral routes; sending a route establishment request message from the start node (ON1) to the end node (ON6); collecting values of parameters from this message as it passes through each node along said spatial candidate route, e.g. the transparency parameter which characterises the spectral dimension (availability of wavelengths, physical parameters varying according to the blocking of links, etc); and, subsequently, using an optimisation method to process all of the parameter values thus collected in order to determine a spectral route, with the selection of one spatial route from the spatial candidate routes if several exist.

Pour déterminer une route spectrale pour une connexion donnée, dans un réseau de télécommunication optique (T), entre un noeud de départ (ON1) et un noeud d'arrivée (ON6) de ce réseau, il consiste à: déterminer, par un procédé de routage classique, une ou des routes spatiales candidates (Route 1, Route 2) reliant le noeud de départ (ON1) au noeud d'arrivée (ON6), chaque route spatiale candidate étant constituée d'une suite de segments de route, chaque segment reliant directement deux noeuds du réseau, et pouvant supporter plusieurs routes spectrales; envoyer un message de demande d'établissement de route, du noeud de départ (ON1) au noeud d'arrivée (ON6); collecter dans ce message, lors de son passage à travers chaque noeud le long de cette route spatiale candidate, des valeurs de paramètres, notamment de paramètre de transparence caractérisant la dimension spectrale (disponibilité des longueurs d'ondes, paramètres physiques variants en fonction de l'occupation des liens, ) et enfin traiter, par un procédé d'optimisation, toutes les valeurs de paramètre ainsi collectées, pour déterminer une route spectrale, entraînant le choix d'une route spatiale parmi les routes spatiales candidates, s'il y en a plusieurs.

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