Monitoring of the transparent fibre infrastructure for FTTx networks: An operator's view

Ehrhardt, A.; Foisel, H.-M.; Escher, F.; Templin, A.; Adamy, M.

doi:10.1109/icton.2010.5549138

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…( 8), and the performance of the detection algorithm can be analytically evaluated from the OTDR specifications. In the following, we fix a low false alarm probability 4 10…”

Section: Detection Performancementioning

confidence: 99%

“…The use of an optical time-domain reflectometer (OTDR) is the most efficient technique to characterize an optical link [4,5]. However, the direct application of OTDR in PONs presents severe limitations: the OTDR waveform is composed by the addition of backscattering from several distribution drop fibers (DDF) and hence the real magnitude and localization of the fault is missed.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced fault characterization by using a conventional OTDR and DSP techniques

et al. 2018

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To plan a rapid response and minimize operational costs, passive optical network operators require to automatically detect and identify faults that may occur in the optical distribution network. In this work, we present DSP-Enhanced OTDR, a novel methodology for remote fault analysis based on conventional optical time-domain reflectometry complemented with reference traces and DSP-based techniques. We first obtain the optimal decision thresholds to detect deviations in the noisy OTDR measurement. In order to quantify and characterize the fault, the detection stage is followed by one of estimation where its return loss and insertion loss are determined. We experimentally demonstrate that this approach allows to detect and characterize faults with an accuracy higher than that found in conventional OTDR trace analysis. In our experiments, we achieved detection sensitivities higher than 0.2 dB in a 1:16 split-ratio PON, and higher than 1 dB in a 1:64 split-ratio PON, achieving estimation errors that can be as low as 0.01 dB. We also verified how the optical network terminal's reflectivity can improve the detection capabilities.

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“…( 8), and the performance of the detection algorithm can be analytically evaluated from the OTDR specifications. In the following, we fix a low false alarm probability 4 10…”

Section: Detection Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced fault characterization by using a conventional OTDR and DSP techniques

et al. 2018

View full text Add to dashboard Cite

show abstract

“…A permanent monitoring of the PON during operation by continuous OTDR-measurements is not necessary from an operator's point of view. Faults and service interruption can be detected from the network management centre by means of alarm analysis of active elements in the PON [3]. Initially, however, the majority of PON will not be fully populated by active customers.…”

Section: Introductionmentioning

confidence: 99%