| 摘要 |
PROBLEM TO BE SOLVED: To attain reduction of demand precision of a used wavelength by separating an optical signal wavelength multiplexed to be inputted by a wavelength branching filter, converting each optical communication node having a wavelength multiplex optical link on an input/output side into an allocation wavelength, outputting it to a specified direction by a space switch, wavelength multiplexing it by a wavelength multiplexer and outputting it. SOLUTION: With respect to optical communication nodes 1a to 1f, an optical signal wavelength multiplexed from an input side of wavelength multiplex optical links 2a to 2g connected to an input/output side respectively is separated and outputted by a wavelength branching filter. The separated optical signal is converted into a wavelength of each optical communication node to which a wavelength conversion part is allocated, is outputted in a specified direction by the space switch and is wavelength multiplexed and outputted by a wavelength multiplexer. Each optical communication node performs wavelength allocation for each one arbitrary wavelength multiplex optical link in a network according to information on a table so that a used wavelength of wavelength passes 3a to 3d becomes different. Thus, it is possible to simplify wavelength management and wavelength allocation control, to reduce the number of used wavelengths, to reduce wavelength precision and to attain reduction of costs. |
