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  • Using machine learning in an open optical line system controller
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-02-14
    Andrea D'Amico; Stefano Straullu; Antonino Nespola; Ihtesham Khan; Elliot London; Emanuele Virgillito; Stefano Piciaccia; Aberto Tanzi; Gabriele Galimberti; Vittorio Curri

    The reduction of system margin in open optical line systems (OLSs) requires the capability to predict the quality of transmission (QoT) within them. This quantity is given by the generalized signal-to-noise ratio (GSNR), including both the effects of amplified spontaneous emission (ASE) noise and nonlinear interference accumulation. Among these, estimating the ASE noise is the most challenging task

    更新日期:2020-03-20
  • Open and disaggregated optical transport networks for data center interconnects [Invited]
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-03-02
    Chongjin Xie; Lei Wang; Liang Dou; Ming Xia; Sai Chen; Huan Zhang; Zhao Sun; Jingchi Cheng

    In this paper, we present Alibaba’s practices and views on open and disaggregated optical transport networks, with a focus on metro data center interconnects (DCIs). We first discuss technology developments that have enabled open optical transport networks, followed by a presentation of our open optical network architecture for DCI networks. We then describe an overall data center network architecture

    更新日期:2020-03-20
  • Locally automated restoration in SDN disaggregated networks
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-03-02
    Nicola Sambo

    Multi-vendor interoperability and disaggregation are attracting the interest of network operators as a way to avoid vendor lock-in, thus opening the market and, possibly, reducing costs. NETCONF, in concert with YANG data models, has been identified as the software defined networking (SDN) configuration protocol for these networks. Currently, several YANG models describe devices in a vendor-neutral

    更新日期:2020-03-20
  • GNPy: an open source application for physical layer aware open optical networks
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-03-13
    Alessio Ferrari; Mark Filer; Karthikeyan Balasubramanian; Yawei Yin; Esther Le Rouzic; Jan Kundrat; Gert Grammel; Gabriele Galimberti; Vittorio Curri

    In this paper, we describe the validation of GNPy. GNPy is an open source application that approaches the optical layer according to a disaggregated paradigm, and its core engine is a quality-of-transmission estimator for coherent wavelength division multiplexed optical networks. This software is versatile. It can be used to prepare a request for proposal/request for quotation, as an engine of a what-if

    更新日期:2020-03-20
  • Opening up ROADMs: a filterless add/drop module for coherent-detection signals
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-03-16
    Jan Kundrat; Ondrej Havlis; Jan Radil; Jaroslav Jedlinsky; Josef Vojtech

    We present an open design of a filterless add/drop reconfigurable optical add/drop multiplexer module with a NETCONF northbound interface. Compared to commercial offerings, the device design is openly documented and available for detailed inspection. Performance is evaluated with up to seven adjacent high-speed 100 Gbps signals on a 50 GHz frequency grid.

    更新日期:2020-03-20
  • Open optical communication systems at a hyperscale operator [Invited]
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-03-16
    Matt Newland; Rene Schmogrow; Mattia Cantono; Vijay Vusirikala; Tad Hofmeister

    Open optical networks present a variety of benefits to service providers and enterprise network operators, such as freedom from single-vendor dependence and the potential to select best-in-class solutions for each individual network role (e.g., line system or optical terminals). In this paper, we discuss two open optical network models: one enables transponder–line system interoperability, whereas

    更新日期:2020-03-20
  • The OpenROADM initiative [Invited]
    IEEE/OSA J. Opt. Commun. Netw. (IF 3.093) Pub Date : 2020-03-17
    Martin Birk; Olivier Renais; Guillaume Lambert; Christophe Betoule; Gilles Thouenon; Ahmed Triki; Dhruv Bhardwaj; Shweta Vachhani; Narayan Padi; Simon Tse

    Historically, reconfigurable optical add/drop multiplexers (ROADMs) have been proprietary with respect to their data and control planes. There has been a growing desire among network operators to move away from such proprietary elements. Together with other network operators and industry partners, we have created the OpenROADM multi-source agreement and published interoperability specifications as

    更新日期:2020-03-20
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