Optical communications – Diagnostic testing – Fault location
Reexamination Certificate
2007-02-27
2007-02-27
Phan, Hanh (Department: 2613)
Optical communications
Diagnostic testing
Fault location
C398S014000, C398S017000, C398S020000, C398S023000, C398S032000, C398S034000, C398S038000, C398S079000, C398S005000, C398S009000, C398S177000, C398S200000, C398S195000, C398S196000, C398S198000
Reexamination Certificate
active
10136407
ABSTRACT:
The invention describes methods and systems for monitoring the performance of an optical network by marking a group of optical signals with a set of identification tags which are unique to network characteristics. In the preferred embodiments, fiber identification (FID) and bundle identification (BID) tags are encoded into optical signals by marking an optical signal with low frequency dither tones whose frequencies are unique to the fiber section and to a bundle of fibers respectively. Detecting of the FID and BID tones provides more effective and accurate monitoring of performance of the optical network and allows determining of the network topology, e.g. paths of optical channels and traffic load through different fiber sections in the network. Other sets of hierarchically arranged identifiers encoded into optical signals have also been proposed, including band, conduit, city, region, country, etc. identifiers, as well as identifiers related to network security and service characteristics.
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Liu Wen
Obeda Paul David
Oprea Dan
Vethanayagam Niranjan
Donnelly Victoria
Phan Hanh
Tropic Networks Inc.
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