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. 17, 2020
Filed:
Aug. 01, 2016
Nec Corporation, Tokyo, JP;
Takehiro Nakano, Tokyo, JP;
NEC CORPORATION, Minato-ku, Tokyo, JP;
Abstract
To enable the transmission and reception of a super-channel optical signal to continue maintaining the possible transmission capacity without providing a redundant configuration in advance even though a failure occurs in a subcarrier, an optical transmitterof the present invention includes a splitting meansfor splitting an inputted client signal so as to make frequency efficiency in optical modulation means optimized; optical modulation meanstoN for modulating one of subcarriers having mutually different wavelengths with the client signal output; a multiplexing meansfor multiplexing the modulated signals and outputting a super-channel optical signal; and a control means, in a state where a failure occurs in one of the subcarriers, for making a split client signal output to modulation means corresponding to a subcarrier having no failure and applying a modulation method with a higher frequency efficiency to at least one of the modulation means.