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SDN enabled flexible optical data center network with dynamic bandwidth allocation based on photonic integrated

Xuwei Xue, Fumi Nakamura, Kristif Prifti

    Optics Express
    |April 1, 2020
    PubMed
    Summary

    This study introduces a software-defined networking (SDN) enabled reconfigurable optical data center network (DCN) architecture. The novel design dynamically reallocates bandwidth, significantly reducing packet loss and improving server-to-server latency.

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    Area of Science:

    • Computer Science
    • Optical Networking
    • Data Center Architecture

    Background:

    • Data center networks (DCNs) face increasing traffic demands from applications.
    • Network flexibility is crucial for optimizing resource allocation and handling variable traffic patterns.
    • Existing DCNs often lack the dynamic bandwidth capabilities needed for modern applications.

    Purpose of the Study:

    • To propose and experimentally validate a reconfigurable optical DCN architecture.
    • To enable dynamic bandwidth allocation for improved network performance.
    • To leverage software-defined networking (SDN) for enhanced DCN flexibility.

    Main Methods:

    • Development of a novel optical top of rack (OToR) switch utilizing a photonic-integrated wavelength selective switch.
    • Implementation of an SDN control plane for managing bandwidth reallocation.
    • Experimental investigation and numerical assessments of the proposed architecture's performance and scalability.

    Main Results:

    • Automatic reallocation of optical bandwidth per link based on traffic patterns.
    • A one-order-of-magnitude decrease in average packet loss compared to inflexible networks.
    • A 42.2% improvement in server-to-server latency performance.
    • Limited performance degradation (11.7%) observed during scalability tests.

    Conclusions:

    • The proposed SDN-enabled reconfigurable optical DCN architecture effectively manages dynamic bandwidth allocation.
    • The architecture offers significant improvements in packet loss and latency compared to inflexible DCNs.
    • The design demonstrates good scalability for large-scale data center deployments.