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:
Jul. 03, 2018
Filed:
Jul. 07, 2016
Mitsubishi Electric Corporation, Tokyo, JP;
Gwillerm Froc, Rennes, FR;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The invention relates to a method for detecting collisions in an out-of-band communication channel, implemented by a master device of an optical communications network enabling in-band communications and further comprising slave devices. The out-of-band communication channel enables transmissions of signalling information with respect to the in-band communications in the form of modulation symbols over successive symbol periods. Collisions occur when plural slave devices access the out-of-band communication channel by using carrier wavelengths matching each other. The master device: receives a signal via the out-of-band communication channel; oversamples the received signal, so as to obtain samples thereof, by using a frequency used for sampling the in-band communications or a submultiple derived therefrom; checks variations of magnitude of at least one parameter of the samples on a per symbol period basis; and detects a collision when the variations of each said parameter are greater than a predefined threshold.