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Title:
METHOD AND MASTER DEVICE FOR DETECTING COLLISIONS IN OUT-OF-BAND COMMUNICATION CHANNEL
Document Type and Number:
WIPO Patent Application WO/2017/006569
Kind Code:
A1
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.

Inventors:
FROC GWILLERM (FR)
Application Number:
PCT/JP2016/003236
Publication Date:
January 12, 2017
Filing Date:
July 07, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
MITSUBISHI ELECTRIC R&D CT EUROPE BV (NL)
International Classes:
H04Q11/00; H04J14/02
Foreign References:
CN101159491A2008-04-09
EP1265402A22002-12-11
US8849108B22014-09-30
US20140160953A12014-06-12
EP2466768A12012-06-20
EP2621112A12013-07-31
Attorney, Agent or Firm:
SOGA, Michiharu et al. (JP)
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