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. 24, 2015
Filed:
Nov. 08, 2010
Ernesto Ciaramella, Rome, IT;
Antonio D'errico, Calci, IT;
Ernesto Ciaramella, Rome, IT;
Antonio D'Errico, Calci, IT;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
A free space optical communications link nodecomprising transmitter apparatuscomprising a first optical transmitter, arranged to transmit high priority traffic on a first upstream optical signal having a first wavelength and at a first optical signal power, and a second optical transmitterarranged to transmit low priority traffic on a second upstream optical signal having a second wavelength, different to the first wavelength, and at a second optical signal power. The nodefurther comprises receiver apparatuscomprising a first optical amplifierarranged to receive and amplify a first downstream optical signal having a third wavelength and carrying high priority traffic and a second downstream optical signal having a fourth wavelength, different to the third wavelength, and carrying low priority traffic. The nodefurther comprises traffic handling control apparatuscomprises a power monitorarranged to monitor an optical signal power of the first downstream optical signal and a controllerarranged to generate and transmit a control signalif said optical signal power is below a first threshold value. The control signal is arranged to cause the second optical signal power to have a value which is unsuitable for transmission.