Wavelength allocation in a ring

Details Wavelength allocation in a ring Wavelength allocation in a ring

H - Electricity

04

J

H04J 14/02 (2006.01) H04L 12/42 (2006.01)

Patent

CA 2308967

A method of wavelength allocation that allows creating a fully meshed network at the optical layer when the nodes are connected at the physical layer in a ring. The method uses a minimum number of wavelengths and a same wavelength set on each fiber, with the constraint that a wavelength is used at most once on any resource. A hop table is prepared with all nodes and all wavelengths and the origin of the table is defined by a first node and a first wavelength. For rings with more than seven nodes, an initial hop vector is defined, which is different for rings with an odd and an even number of nodes. All hops for all nodes and all wavelengths are then generated using the initial hop vector, and recorded in the hop table. After the hop table is completed, the nodes are equipped with wavelength-specific receivers and transmitters according to a source-destination table prepared from the hop table. Hop tables are also provided for rings with less than seven nodes.

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