H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 14/02 (2006.01)
Patent
CA 2528199
A method of conveying a WDM optical signal through a WDM system includes demultiplexing the received WDM optical signal into two or more spectral bands. Each spectral band has a respective predetermined center frequency and bandwidth, which encompasses a respective portion of the transmission window of a communications link. Each spectral band is then independently conveyed through the WDM system. This arrangement provides a flexible banded MUX/DEMUX architecture that enables multiple different channel plans (spectral grids) to co-exist within a common optical communications network. Legacy equipment can therefore continue in service, as traffic is gradually migrated onto new, higher capacity systems. This provides a convenient migration path for network service providers to progressively upgrade the information carrying capacity of network links, without stranding legacy equipment.
L'invention concerne un procédé d'acheminement d'un signal optique WDM par un système WDM qui consiste à démultiplexer le signal WDM optique reçu en au moins deux bandes spectrales. Chaque bande spectrale possède ses propres fréquence centrale et largeur de bande, qui comprennent une partie respective de la fenêtre de transmission d'une liaison de communication. Chaque bande spectrale est ensuite acheminée individuellement via le système WDM. Ce dispositif offre une architecture flexible à bandes MUX/DEMUX qui permet à de multiples plans de canaux différents (grilles spectrales) de coexister dans un réseau de communication optique commun. L'équipement existant peut ainsi rester effectif, le trafic étant progressivement migré vers des systèmes à capacité supérieure. Ceci permet d'offrir un trajet de migration convenable aux fournisseurs du service du réseau pour mettre progressivement à niveau la capacité de transmission d'informations des liaisons de réseau, sans câbler l'équipement existant.
Blake Cassels & Graydon Llp
Ciena Luxembourg S.a.r.l.
Nortel Networks Limited
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