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. 29, 2017
Filed:
Mar. 12, 2013
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Matteo Costantini, Genoa, IT;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method () of controlling optical signal power levelling in an optical communication network node configured to apply an optical attenuation, α, to a pass-through optical signal. The method comprises: a. performing the following steps i. to iii. until an attenuation variation value, Δα, is greater than a preselected attenuation variation threshold value (), Δα: i. measuring () an optical signal power of an optical signal; ii. calculating () a difference, ΔP, between the measured optical signal power and a target optical signal power; iii. calculating () a value for the attenuation variation, Δα, to be applied to the optical attenuation taking account of ΔP; b. obtaining () a current value of the optical attenuation, α, and obtaining () a new optical attenuation value, α, in dependence on the current value of the optical attenuation, a current value of the attenuation variation, Δα, and at least an earlier value of the attenuation variation, Δ; and c. generating () a control signal arranged to configure the node to apply the new optical attenuation value, α.