The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2016
Filed:
Jun. 25, 2014
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
An apparatus determines, in response to demands for traffic between nodes in a network transmitting wavelength-multiplexed optical-signals, routes each providing connection between nodes, and estimates, for each link, communication-channels to be established, based on a wavelength-constraint condition that the number of communication-channels to be established be not greater than a first upper-limit for available optical-signal wavelengths. The apparatus assigns wavelengths to the communication-channels, based on a system-constraint condition that the number of optical-signals having an identical wavelength and redundantly usable be not greater than a second upper-limit for available transmission-systems. The apparatus determines a target-number of wavelengths for reducing a required number of transmission-systems. The apparatus changes the wavelength-constraint condition by defining the first upper-limit as the target-number and changes the system-constraint condition by reducing the second upper-limit, and re-estimates communication-channels based on the changed wavelength-constraint condition and re-assigns wavelengths based on the changed system-constraint condition.