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Predictive autonomic transmission for low-cost low-margin metro optical networks

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Abstract

Low-cost low-margin implementation plays an essential role in upgrading optical metro networks required for future 5G ecosystem. In this regard, low-resolution analog-to-digital converters can be used in coherent optical transponders to reduce cost and power consumption. However, the resulting transmission systems become more sensitive to physical layer fluctuations like the events caused by fiber stressing. Such fluctuations might have a strong impact on the quality of transmission (QoT) of the signals. To guarantee robust operation, soft decision forward error correction (FEC) techniques are required to guarantee zero post-FEC bit error rate (BER) transmission, which could increase the power consumption of the receiver and thus operational expenses. In this paper, we aim at minimizing power consumption while keeping zero post-FEC errors by means of a predictive autonomic transmission agent (ATA) based on machine learning. We present a sophisticated ATA model that, taking advantage of real-time monitoring of state of polarization traces and the corresponding pre-FEC BER, predicts the right FEC configuration for short-term operation, thus requiring minimum power consumption. In addition, we propose a complementary long-term prediction of excessive pre-FEC BER to enable remote reconfiguration at the transmitter side through the network controller. A set of experimental measurements is used to train and validate the proposed ATA system. Exhaustive numerical analysis allows concluding that ATA based on artificial neural network predictors achieves the maximum QoT robustness with 80% power consumption reductions compared to static FEC configuration.

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Acknowledgements

The research leading to these results has received funding from the European Commission for the H2020-ICT-2016-2 METRO-HAUL Project (G.A. 761727), from the AEI/FEDER TWINS Project (TEC2017-90097-R) and from the Catalan Institution for Research and Advanced Studies (ICREA).

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Authors and Affiliations

  1. Optical Communications Group (GCO), Universitat Politècnica de Catalunya (UPC), Barcelona, Spain

    Marc Ruiz, Behnam Shariati & Luis Velasco

  2. Nokia Bell Labs, Nozay, France

    Fabien Boitier & Patricia Layec

Authors
  1. Marc Ruiz
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  2. Fabien Boitier
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  3. Behnam Shariati
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  4. Patricia Layec
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  5. Luis Velasco
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Correspondence to Luis Velasco.

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Ruiz, M., Boitier, F., Shariati, B. et al. Predictive autonomic transmission for low-cost low-margin metro optical networks. Photon Netw Commun 40, 68–81 (2020). https://doi.org/10.1007/s11107-020-00909-5

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  • DOI: https://doi.org/10.1007/s11107-020-00909-5

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