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:
Aug. 27, 2002
Filed:
Jun. 09, 1998
Kazuo Takatsu, Kanagawa, JP;
Yoshinori Tochiki, Kanagawa, JP;
Kimio Uekama, Kanagawa, JP;
Takeshi Sakamoto, Kanagawa, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A wavelength-division multiplexing optical communication system for wavelength-division multiplexing a plurality of optical signals having different wavelengths and transmitting a wavelength-division multiplexed signal via an optical fiber transmission line. The wavelength-division multiplexing system includes a multiplexing unit that wavelength-multiplexes a plurality of optical signals having different wavelengths. A storing unit stores information regarding an addition or subtraction of an optical signal to be wavelength-multiplexed, into a predetermined time slot of a frame signal that is composed of a plurality of time slots. The wavelength-division multiplexing system outputs a monitor/control frame signal, based upon the stored information. A transmitting device transmits the monitor/control signal as an optical signal having a wavelength different from the wavelengths of the multiplexed optical signals.