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Publications

2018

N. Sambo, A. Giorgetti, F. Cugini and P. Castoldi, "Sliceable transponders: pre-programmed OAM, control, and management", IEEE/OSA JLT, 2018 article
P. Giardina, N. Sambo, M. Dallaglio, G. Bernini, G. Carrozzo, F. Cugini, P. Castoldi, "Experimental Demonstration of a Lightpath Management Procedure Based on a Hierarchical Architecture", IEEE/OSA JOCN, 2018 article
I. Sartzetakis, K. Christodoulopoulos, E. Varvarigos, "Cross-Layer Adaptive Elastic Optical Networks", IEEE/OSA JOCN, 2018 article
P. Soumplis, K. Christodoulopoulos, M. Quagliotti, A. Pagano, E. Varvarigos, "Multi-Period Planning With Actual Physical and Traffic Conditions", IEEE/OSA JOCN, 2018 article
E. Seve, J. Pesic, C. Delezoide and Y. Pointurier, "Learning process for reducing uncertainties on network parameters and design margins", IEEE/OSA JOCN, 2018 article
J. Pesic, N. Rossi, T. Zami, "Fiber type dependent benefits when deploying up-to-300Gb/s elastic transponders adapting to ageing of margins", OFC 2018
J. Pesic, T. Zami, N. Rossi, S. Bigo, "Do elastic transponders with granularity finer than 50 Gb/s make gradual fit of modulation to ageing more profitable?", OFC 2018
C. Delezoide, P. Ramantanis, P. Layec, "Weighted filter penalty prediction for QoT Estimation", OFC, 2018
Y. Pointurier, "Marginless Optical Networking with Machine Learning", OFC 2018
N. Sambo, K. Christodoulopoulos, N. Argyris, P. Giardina, C. Delezoide, A. Sgambelluri, A. Kretsis, G. Kanakis, F. Fresi, G. Bernini, H. Avramopoulos, E. Varvarigos, P. Castoldi, "Experimental demonstration of fully disaggregated white box including different types of transponders and monitors, controlled by NETCONF and YANG", OFC 2018 article
K. Christodoulopoulos, N. Sambo, N. Argyris, P. Giardina, G. Kanakis, A. Kretsis, F. Fresi, A. Sgambelluri, G. Bernini, C. Delezoide, F. Cugini, H. Avramopoulos, E. Varvarigos, "Observe-Decide-Act: Experimental Demonstration of a Self-Healing Network", OFC 2018 article

2017

A. P. Vela, M. Ruiz, F.Fresi, N. Sambo, F. Cugini, G. Meloni, L. Potì, L. Velasco, and P. Castoldi, "BER Degradation Detection and Failure Identification in Elastic Optical Networks", IEEE/OSA JLT, 2017 article
P. Soumplis, K. Christodoulopoulos, M. Quagliotti, A. Pagano, E. Varvarigos, "Network Planning with Actual Margins" IEEE/OSA Journal of Lightwave Technology , Volume: 35, Issue: 23, Dec. 2017 article
N. Sambo, A. Giorgetti, F. Cugini, M. Dallaglio, P. Castoldi, "Control and Management of Sliceable Transponders", ECOC 2017 article
N. Sambo, P. Giardina, I. Sartzetakis, A. Sgambelluri, F. Fresi, M. Dallaglio, G. Meloni, G. Bernini, K. Christodoulopoulos, P. Castoldi, E. Varvarigos "Experimental Demonstration of Network Automation Based on QoT Estimation and Monitoring in Both Single- and Multi-Domains", ECOC 2017 article
I Sartzetakis, K Christodoulopoulos, E Varvarigos "Improving QoT estimation accuracy through active monitoring", International Conference on Transparent Optical Networks (ICTON), 2017 article
C. Delezoide, P. Ramantanis, P. Layec, "On the performance prediction of optical transmission systems in presence of filtering", International Conference on Transparent Optical Networks (ICTON), 2017 article
M Dallaglio, N Sambo, F Cugini, P Castoldi, "Control and Management of Transponders With NETCONF and YANG", IEEE/OSA Journal of Optical Communications and Networking 9 (3), 2017 article
M Dallaglio, N Sambo, F Cugini, P Castoldi, "YANG Models for Vendor-Neutral Optical Networks, Reconfigurable through State Machine", IEEE Communications Magazine 55, 2017. article
I Sartzetakis, K Christodoulopoulos, EM Varvarigos, "On reducing optical monitoring uncertainties and localizing soft failures", IEEE International Conference on Communications (ICC), 2017 article
K Christodoulopoulos, I Sartzetakis, P Soumplis, E Varvarigos, "Cross-layer and dynamic network orchestration based on optical performance monitoring", International Conference on Optical Network Design and Modeling (ONDM), 2017 article
I Sartzetakis, K Christodoulopoulos, E Varvarigos, "QoT aware adaptive elastic optical networks", Optical Fiber Communication Conference (OFC), 2017 article
P Soumplis, K Christodoulopoulos, M Quagliotti, A Pagano, E Varvarigos, "Actual margins algorithm for multi-period planning", Optical Fiber Communication Conference (OFC), 2017 article
M Dallaglio, N Sambo, F Cugini, P Castoldi, "Pre-programming resilience schemes upon failure through NETCONF and YANG", Optical Fiber Communication Conference (OFC), 2017 article
P Giardina, N Sambo, M Dallaglio, G Bernini, G Carrozzo, F Cugini, P. Castoldi, "Configuring monitoring entities through NETCONF and YANG in control and hierarchical management planes", Optical Fiber Communication Conference (OFC), 2017 article
F Paolucci, N Sambo, F Cugini, P Castoldi, "Demonstration of effective OAM for alien wavelength and transport network", Optical Fiber Communications Conference and Exhibition (OFC), 2017 article
M Dallaglio, QP Van, F Boitier, C Delezoide, D Verchere, P Layec, A. Dupas, N. Sambo, S. Bigo, P. Castoldi, "Demonstration of a SDN-based spectrum monitoring of elastic optical networks", Optical Fiber Communications Conference and Exhibition (OFC), 2017 article
E. Seve, J. Pesic, C. Delezoide, Y. Pointurier, "Learning process for reducing uncertainties on network parameters and design margins", Optical Fiber Communications Conference and Exhibition (OFC), 2017 article
M. Dallaglio ; N. Sambo ; F. Cugini ; P. Castoldi, "Control and management of transponders with NETCONF and YANG", IEEE/OSA Journal of Optical Communications and Networking. Volume: 9, Issue: 3, March 2017 article

2016

Y. Pointurier, "Design of Low-Margin Optical Networks," J. Opt. Commun. Netw. 9, A9-A17 (2017) article
N. Sambo, K. Christodoulopoulos, P. Castoldi, E. Varvarigos, "Spectrum sharing for elastic transmission parameter adaptation," ECOC, 2016. poster article
T. Zami, J. Pesic and P. Ramantanis, "How deploying elastic and fixed 100 Gb/s transponders can further optimize cost per Gb/s during ageing of WDM networks," ECOC, 2016.
M. Ruiz, F. Fresi, A. Vela, G. Meloni, N. Sambo, F. Cugini, L. Potì, L. Velasco, P. Castoldi, "Service-triggered failure identification/localization through monitoring of multiple parameters," ECOC, 2016. article presentation
I. Sartzetakis, K. Christodoulopoulos, C. P. Tsekrekos, D. Syvridis, and E. Varvarigos, "Quality of Transmission Estimation in WDM and Elastic Optical Networks Accounting for Space–Spectrum Dependencies," J. Opt. Commun. Netw. 8, 676-688, 2016. article
K. Christodoulopoulos, P. Soumplis, I. Sartzetakis, M. Quagliotti,A. Di Giglio, A. Pagano, N. Argyris, C. Spatharakis, S. Dris, H. Avramopoulos, JC. Antona, C. Delezoide, P. Jennevé, J. Pesic, Y. Pointurier, N. Sambo, F. Cugini, P. Castoldi, G. Bernini, F. Moscatelli,G. Carrozzo, E. Varvarigos, "ORCHESTRA- Optical performance monitoring enabling flexible networking," European Conference on Networks and Communications (EuCNC), 2016. (poster) poster article
M. Dallaglio, N. Sambo, J. Akhtar, F. Cugini, and P. Castoldi, "YANG Model and NETCONF Protocol for Control and Management of Elastic Optical Networks," Optical Fiber Communication Conference, 2016. article presentation
Y. Pointurier, "Design of low-margin optical networks", Optical Fiber Communication Conference, 2016. article presentation
F. Cugini, C. Porzi, N. Sambo, A. Bogoni, and P. Castoldi, "Receiver Architecture with Filter for Power-Efficient Drop&Waste Networks," Optical Fiber Communication Conference, 2016. article
J. Pesic, T. Zami, P. Ramantanis, and s. bigo, "Faster return of investment in WDM networks when elastic transponders dynamically fit ageing of link margins," Optical Fiber Communication Conference, 2016. article
K. Christodoulopoulos, N. Sambo, and E. (M.) Varvarigos, "Exploiting Network Kriging for Fault Localization," Optical Fiber Communication Conference, 2016. article presentation
I. Sartzetakis, K. Christodoulopoulos, C. P. Tsekrekos, D. Syvridis, and E. (M.) Varvarigos, "Estimating QoT of Unestablished Lightpaths," Optical Fiber Communication Conference, 2016. article presentation
M. Dallaglio, N. Sambo, F. Cugini, and P. Castoldi, "Management of Sliceable Transponder with NETCONF and YANG," Optical Network Design and Modelling (ONDM), 2016. article presentation
N. Sambo, A. Di Giglio, A. Pagano, F. Cugini, P. Castoldi, "Monitoring plane architecture for modern cloud-based networks," Optical Network Design and Modelling (ONDM), 2016. presentation
N. Sambo, F. Cugini, A. Sgambelluri, and P. Castoldi, "Monitoring Plane Architecture and OAM Handler," J. Lightwave Technol. 34, 1939-1945, 2016. article
J. Pesic, N. Rossi, T. Zami, A. Morea, "Cost Benchmarking When Deploying Elastic Transponders Accounting for Margins Ageing Versus When Deploying Only 100 Gb/s Interfaces," European Conference on Network and Optical Communications (NOC), 2016. article
F. Cugini, N. Sambo, F. Paolucci, F. Fresi, P. Castoldi, "Adaptation and Monitoring for Elastic Alien Wavelengths," European Conference on Network and Optical Communications (NOC), 2016. (invited) article presentation

2015

G. Meloni, L. Potì, N. Sambo, F. Fresi, F. Cavaliere, "Code-adaptive Transmission Accounting for Filtering Effects in EON", ONDM, 2015. article presentation
A. Di Giglio, A. Pagano, K. Christodoulopoulos, P. Kokkinos, N. Argyris, C. Spatharakis, S. Dris, H. Avramopoulos, J.-C. Antona, C. Delezoide, P.Jennevé, J. Pesic, Y. Pointurier, P. Castoldi, N. Sambo, G. Bernini , G. Carrozzo, and E. Varvarigos, "Cross-layer, dynamic, network orchestration, leveraging software-defined optical performance monitors", Fotonica, 2015. article presentation
K. Christodoulopoulos, P. Kokkinos, A. Di Giglio, A. Pagano, N. Argyris, C. Spatharakis, S. Dris, H. Avramopoulos, JC. Antona, C. Delezoide, P. Jennevé, J. Pesic, Y. Pointurier, N. Sambo, F. Cugini, P. Castoldi, G. Bernini, G. Carrozzo, E. Varvarigos, "ORCHESTRA – Optical performance monitoring enabling flexible networking", ICTON, 2015. (invited) article presentation
P. Soumplis, P. Pananikolaou, K. Christodoulopoulos, N. Argyris, C. Spatharakis, S. Dris, H. Avramopoulos, E. Varvarigos, "Cross-layer optimization: Network cost vs. physical layer margins", ICTON, 2015. (invited) article presentation
P. Castoldi, G. Bernini, K. Christodoulopoulos, F. Cugini, N. Sambo, "A monitoring architecture for self-configurable optical networks", ICTON, 2015. (invited) article presentation
J. Pesic, A. Morea, "Operating a network close to the zero margin regime thanks to elastic devices", ICTON, 2015. article
N. Sambo, F. Cugini, A.Sgambelluri, P. Castoldi, "Hierarchical monitoring architecture and OAM Handler", ECOC 2015. presentation
P. Jennevé, A. Morea, C. Delezoide, S. Bigo, "Why pulse shaping for cost-sensitive metro networks should differ from optimal pulse shaping for long-haul networks", Asia Communications and Photonics Conference, 2015.

What is the ORCHESTRA project?

The vision of the ORCHESTRA is to close the loop between the physical layer and the control plane, by using real-time impairment measurement capabilities of coherent optical transceivers.

OrchestraOverall

The ORCHESTRA network understands itself, by processing and correlating the DSP (Digital Signal Processing) based impairment monitoring information that can be made available almost for free in the coherent receivers, and proceeds to optimize its performance in a dynamic and automated way. The network itself is viewed as a continuously running process that perceives current conditions, and then plans, decides, and acts on those conditions.

Coherent optical technology using DSP is the new norm, since it is the only viable way to increase transmission rate and reach (i.e., feasible distance) and achieve software defined flexibility. The coherent receiver can also be leveraged to provide physical impairment information from the DSP: effectively, every receiver in the data plane can become a software defined optical performance/impairment monitor (soft-OPM). Thus, the control plane can be aware of the state of every single lightpath in the network, but can additionally combine multiple monitored values in order to infer values of unmonitored effects or network entities (links, subpaths). What is particularly interesting is that this function comes almost for free, since soft-OPM function requires lightweight additions in the DSP capabilities already included in ASICs of the coherent receivers. As a result, there will no longer be a need for deploying fixed hardware monitors. This will yield significant savings in cost, energy consumption and network hardware complexity.

The provided soft-OPM functionality enables the control plane to provide true flexibility in the optical network and real cross-layer optimization. The control plane can assess the state of every optical connection in real-time, infer and solve interference problems, or re-optimize the network, by controlling transmission parameters and resources (links-spectrum) allocated to the connections. For example the impairment margins for operating the transceivers can be lowered, using their capabilities to the fullest extent. In this way, a really dynamic optical network is built, whether this involves setting up rapidly a new connection, or adjusting an existing one (increase/decrease its rate), or handling QoT performance issues and failures. By applying true cross-layer and across connections optimization starting from a local (involving a single connection) and then moving to more global scale the network can achieve high efficiency, close to its limits, while keeping the connection interference and control overhead to the minimum. This will be materialized by a hierarchical monitoring and control plane that will be based on a well-defined and complete library of control primitives (actions).

Administrative Information

Project Title: Optical peRformanCe monitoring enabling dynamic networks using a Holistic cross-layEr, Self-configurable Truly flexible approach
Project Acronym: ORCHESTRA
Call identifier: H2020-ICT-2014
Grant Agreement Number: 645360
Project Coordinator: Emmanouel Varvarigos , Computer Technology Institute & Press Diophantus (CTI)
Duration: 36 months
Number of Partners: 6
Funding from the EC: 2.6 million Euros
Start Date: 1st February 2015
End Date: 31st January 2018
Keywords: Optical communications, network technologies / internetworking, optical monitoring, physical layer impairments, dynamic network operation, DSP algorithms, OAM handler, control and monitor infrastructure, cross-layer optimization, failure and fault localization

Welcome to the ORCHESTRA project

An optical network has to be observable before it can become controllable and be subject to optimization, and this is where ORCHESTRA EU project comes in.

optical fibers

ORCHESTRA‘s high observability relies on information provided by the coherent transceivers that are extended, almost for free, to operate as software defined multi-impairment optical performance monitors (soft-OPM). Information from multiple soft-OPMs can be correlated to infer information for unmonitored or un-established paths, effectively supporting alien wavelengths, and localize QoT problems and failures.

The network is viewed as a continuously running process that perceives current conditions, decides, and acts on those conditions. ORCHESTRA‘s advanced cross-layer optimization procedures will be implemented within a new specifically designed library module, called DEPLOY.

A new dynamic and hierarchical control and monitoring (C&M) infrastructure will be then created to interconnect the multiple soft-OPMs and the proposed virtual and real C&M entities running the DEPLOY algorithms, exploiting the reconfigurability capabilities of enhanced tunable transceivers.

At the top of the hierarchical infrastructure, a novel OAM Handler prototype will be implemented, as part of the SDN-based ABNO architecture. The proposed C&M infrastructure will be enriched with active-control functionalities, closing the control loop, and enabling the network to be truly dynamic and self-optimized.

ORCHESTRA PROJECT VIDEO CLIP

ORCHESTRA Field Trial Experiments

Experiment 1: Automatic Configuration Based on Finite State Machine

Experiment 2: QoT Restoration Leveraging Accurate Filtering Penalty Estimation

Experiment 3: Tx/Rx Frequency Tuning to Minimize Filtering Effects

Work Breakdown

ORCHESTRA is based on five technical Work packages addressing the project's objectives:

WP2 - Software Defined Monitoring and Dynamic Network Architecture
WP3 - Development of Flexible Optical Transceiver and Software-Defined Optical Performance Monitoring Algorithm Suite
WP4 - Cross Layer Algorithms: Multiple-Rx Correlation and Optimization
WP5 - Control and Monitoring Plane and OAM Handler
WP6 - Testbed and Demo

Beside the technical activities, WP1 is in charge of project management and WP7 is focused on the project impact (dissemination, exploitation and marketing plan and standardization).

WP2 collects requirements and specification for the multi-impairment monitoring at the transceivers, the network optimization, and the control and monitoring (C&M) plane, which are all fed to the corresponding WPs (WP3, WP4, WP5).

Cross-layer monitoring and optimization algorithms developed in WP4, utilize the monitoring information collected from WP3.

The design and the implementation of the C&M plane in WP5 is affected by the characteristics of the cross-layer monitoring and optimization mechanisms of WP4.

WP6 puts all the pieces together and builds a testbed and a field demo for evaluation.

The results of WP3, WP4, WP5 and WP6 are disseminated and exploited in WP7.