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eNd to End scalable and dynamically reconfigurable oPtical arcHitecture for application-awarE SDN cLoud datacentErs

Total Cost €


EC-Contrib. €






 NEPHELE project word cloud

Explore the words cloud of the NEPHELE project. It provides you a very rough idea of what is the project "NEPHELE" about.

functional    consolidates    physical    scales    urge    prototyped    94    power    hybrid    links    electronic    hardware    transparent    single    bandwidth    telecom    linearly    southbound    demands    datacentre    card    connectivity    controller    merges    datacenter    30    deployment    smart    virtualization    comprising    pod    infrastructure    qos    tdma    experiencing    offers    inter    networks    architecture    deterministic    compute    northbound    view    exacerbates    whereas    configurability    domains    scenarios    ethernet    operator    architectures    vms    service    allocation    modules    programming    saves    quasi    rack    digit    scalability    re    demonstrated    migrating    lab    solution    network    layer    disaggregated    networking    overlaying    subsystem    sdn    interfaces    abstracts    innovative    switch    optical    agreements    business    environment    dynamic    traffic    disaggregation    interface    software    subsystems    granularity    latency    integrates    plane    50gb    scenario    cloud    400gb    fast    hosts    functions    storage    overlay    reconfigurability   

Project "NEPHELE" data sheet

The following table provides information about the project.


Organization address
address: Patission Str. 42
city: ATHINA
postcode: 10682

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Greece [EL]
 Project website
 Total cost 3˙053˙636 €
 EC max contribution 3˙053˙636 € (100%)
 Programme 1. H2020-EU. (Future Internet: Software, hardware, Infrastructures, technologies and services)
 Code Call H2020-ICT-2014-1
 Funding Scheme RIA
 Starting year 2015
 Duration (year-month-day) from 2015-02-01   to  2018-01-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
2    MELLANOX TECHNOLOGIES LTD - MLNX IL (YOKNEAM) participant 557˙500.00
4    SEAGATE SYSTEMS UK LIMITED UK (HAVANT) participant 430˙381.00
5    PANEPISTIMIO PATRON EL (RIO PATRAS) participant 381˙250.00
6    INTEROUTE S.P.A. IT (Rome) participant 268˙250.00
7    NEXTWORKS IT (PISA) participant 255˙000.00


 Project objective

Datacentre traffic is experiencing 2-digit growth challenging the scalability of current network architectures. The new concept of disaggregation exacerbates bandwidth and latency demands whereas emerging cloud business opportunities urge for reliable inter-datacenter networking. PROJECT will develop an end-to-end solution extending from the datacenter architecture and optical subsystem design to the overlaying control plane and application interfaces. PROJECT hybrid electronic-optical network architecture scales linearly with the number of datacenter hosts, offers Ethernet granularity and saves up to 94% power and 30% cost. It consolidates compute and storage networks over a single, Ethernet optical TDMA network. Low latency, hardware-level dynamic re-configurability and quasi-deterministic QoS are supported in view of disaggregated datacenter deployment scenarios. A fully functional control plane overlay will be developed comprising an SDN controller along with its interfaces. The southbound interface abstracts physical layer infrastructure and allows dynamic hardware-level network reconfigurability. The northbound interface links the SDN controller with the application requirements through an Application Programming Interface. PROJECT innovative control plane enables Application Defined Networking and merges hardware and software virtualization over the hybrid optical infrastructure. It also integrates SDN modules and functions for inter-datacenter connectivity, enabling dynamic bandwidth allocation based on the needs of migrating VMs as well as on existing Service Level Agreements for transparent networking among telecom and datacenter operator’s domains. Fully-functional network subsystems will be prototyped: a 400Gb/s hybrid Top-of-Rack switch, a 50Gb/s electronic-optical smart Network Interface Card and a fast optical pod switch. PROJECT concept will be demonstrated in the lab and in its operational environment for both intra- and inter-datacenter scenario


List of deliverables.
End-to-end NEPHELE connectivity demonstration validated in lab environment Demonstrators, pilots, prototypes 2019-03-11 10:29:30
Website development and preparation of dissemination material Websites, patent fillings, videos etc. 2019-03-11 10:29:45
NEPHELE inter- and intra-datacenter demonstration in operational environment Demonstrators, pilots, prototypes 2019-03-11 10:29:41
NEPHELE video presentation Websites, patent fillings, videos etc. 2019-03-11 10:29:31

Take a look to the deliverables list in detail:  detailed list of NEPHELE deliverables.


year authors and title journal last update
List of publications.
2017 K. Yiannopoulos; K. Kontodimas; K. Christodoulopoulos; E. Varvarigos
Resource partitioning in the NEPHELE datacentre interconnect
published pages: , ISSN: , DOI: 10.5281/zenodo.1010220
International Conference on Transparent Optical Networks (ICTON 2017) 2019-05-30
2017 P. Kokkinos; I. Gravalos; A. Kretsis; E. Varvarigos
Inter-Datacenter Virtual Capacity Services: Reality and Mechanisms
published pages: , ISSN: , DOI: 10.5281/zenodo.1009863
Cloudnet 2017 2019-05-30
2016 Nikos Iliadis, Giannis Kanakis, Nikolaos Argyris, Christos Spatharakis, Paraskevas Bakopoulos, Hercules Avramopoulos, Silvia Spiga, Marcus-Christian Amann
Optical PAM-4 Generation through Polarization Multiplexing in Single-Polarization Single-Mode VCSELs
published pages: , ISSN: , DOI:
23rd IEEE International Conference on Electronics, Circuits and Systems (ICECS) 2019-05-30
2017 Giada Landi, Marco Capitani, Domenico Gallico, Matteo Biancani; Kostas Christodoulopoulos, Muzzamil Aziz
An Application-aware SDN Controller for Hybrid Optical-electrical DC Networks
published pages: , ISSN: , DOI: 10.5281/zenodo.1005021
ICN 2017 2019-05-30
2016 Stefanos Dris, Paraskevas Bakopoulos, Nikolaos Argyris, Christos Spatharakis, Hercules Avramopoulos
Scaling single-wavelength optical interconnects to 180 Gb/s with PAM-M and pulse shaping
published pages: 977506, ISSN: , DOI: 10.1117/12.2208876
Next-Generation Optical Networks for Data Centers and Short-Reach Links III 2019-05-30
2016 Paraskevas Bakopoulos, Stefanos Dris, Nikolaos Argyris, Christos Spatharakis, Hercules Avramopoulos
112 Gb/s sub-cycle 16-QAM Nyquist-SCM for intra-datacenter connectivity
published pages: 97750A, ISSN: , DOI: 10.1117/12.2211639
Next-Generation Optical Networks for Data Centers and Short-Reach Links III 2019-05-30
2017 K. Christodoulopoulos, K. Kontodimas, A. Siokis, K. Yiannopoulos, E. Varvarigos
Efficient Bandwidth Allocation in the NEPHELE Optical/Electrical Datacenter Interconnect
published pages: 1145, ISSN: 1943-0620, DOI: 10.1364/jocn.9.001145
Journal of Optical Communications and Networking 9/12 2019-05-30
2017 P. Soumplis; P. Kokkinos; E. A. Varvarigos
Optimally-driven Online Reservations in Elastic Optical Networks
published pages: , ISSN: , DOI: 10.5281/zenodo.1010012
ECOC 2017 2019-05-30
2016 Elad Mentovich
Photonics In Datacenters; towards 400Gb/s
published pages: , ISSN: , DOI:
2016 Paraskevas Bakopoulos
Optical switching for scalable and programmable data center networks
published pages: , ISSN: , DOI:
4th Optical Interconnect in Data Centers EU-Symposium 2019-05-30
2015 Ciulli, Nicola
NEPHELE project presentation
published pages: , ISSN: , DOI: 10.5281/zenodo.32877
1 2019-05-30
2015 Pitwon, Richard
Photonic Interconnect Technologies for Data Centre Environments
published pages: , ISSN: , DOI: 10.5281/zenodo.33067
1 2019-05-30
2016 Christos Spatharakis, Giannis Kanakis, Nikolaos Iliadis, Paraskevas Bakopoulos, Hercules Avramopoulos, Konstantinos Maragos, George Lentaris, Dimitrios Soudris
A 56 Gbaud Reconfigurable FPGA Feed-Forward Equalizer for Optical Datacenter Networks with flexible Baudrate- and Modulation-Format
published pages: , ISSN: , DOI:
23rd IEEE International Conference on Electronics, Circuits and Systems (ICECS) 2019-05-30
2015 Zahavi Eitan
The Green Data Center
published pages: , ISSN: , DOI: 10.5281/zenodo.32795
1 2019-05-30
2015 Bakopoulos Paraskevas
Optical switching in datacenter networks: Why and how?
published pages: , ISSN: , DOI: 10.5281/zenodo.32747
Optical Communication (ECOC), 2015 European Conference on 1 2019-05-30
2016 Ioannis Patronas, Angelos Kyriakos, Dionysios Reisis
Switching Functions of a Data Center Top-of-Rack(ToR)
published pages: , ISSN: , DOI:
23rd IEEE International Conference on Electronics, Circuits and Systems (ICECS) 2019-05-30
2016 Muzzamil Aziz, Amirreza FazelyH, Giada Landi, Domenico Gallico, Kostas Christodoulopoulos, Philipp Wieder
SDN-Enabled Application-Aware Networking for Datacenter Networks
published pages: , ISSN: , DOI:
23rd IEEE International Conference on Electronics, Circuits and Systems (ICECS) 2019-05-30
2018 Paraskevas Bakopoulos, Konstantinos Christodoulopoulos, Giada Landi, Muzzamil Aziz, Eitan Zahavi, Domenico Gallico, Richard Pitwon, Konstantinos Tokas, Ioannis Patronas, Marco Capitani, Christos Spatharakis, Konstantinos Yiannopoulos, Kai Wang, Konstantinos Kontodimas, Ioannis Lazarou, Philipp Wieder, Dionysios I. Reisis, Emmanouel Manos Varvarigos, Matteo Biancani, Hercules Avramopoulos
NEPHELE: An End-to-End Scalable and Dynamically Reconfigurable Optical Architecture for Application-Aware SDN Cloud Data Centers
published pages: 178-188, ISSN: 0163-6804, DOI: 10.1109/mcom.2018.1600804
IEEE Communications Magazine 56/2 2019-05-30
2018 Paraskevas Bakopoulos; Konstantinos Tokas; Christos Spatharakis; Ioannis Patronas; Giada Landi; Kostas Christodoulopoulos; Marco Capitani; Angelos Kyriakos; Muzzamil Aziz; Dionysis Reisis; Emmanuel Varvarigos; Eitan Zahavi; Hercules Avramopoulos
Optical datacenter network employing slotted (TDMA) operation for dynamic resource allocation
published pages: , ISSN: , DOI: 10.5281/zenodo.1208054
2016 K. Christodoulpoulos, K. Kontodimas, A. Siokis, K. Yiannopoulos, E. Varvarigos
Collisions Free Scheduling in the NEPHELE Hybrid Electrical/Optical Datacenter Interconnect
published pages: , ISSN: , DOI:
23rd IEEE International Conference on Electronics, Circuits and Systems (ICECS) 2019-05-30

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