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:
Nov. 07, 2023
Filed:
Aug. 13, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Kojun Koshiji, Musashino, JP;
Yasuharu Kaneko, Musashino, JP;
Mika Ishizuka, Musashino, JP;
Seisho Yasukawa, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A local wavelength defragmentation apparatus performs wavelength defragmentation for at least one wavelength path passing through a target link in an optical transmission network. The local wavelength defragmentation apparatus includes a reallocation rank determination unit configured to calculate a remaining time from a present time to an abolition timing for each of the at least one wavelength path and determine rank for wavelength reallocation of the at least one wavelength path based on the remaining time; and a reallocation number determination unit configured to calculate utilization of at least one reallocatable wavelength number for each of the at least one wavelength path according to the rank, and determine a wavelength so that a wavelength of the wavelength number having the highest utilization is reallocated.