Introduction
The goal of the ONS department is to contribute in defining the evolution of future transport networks (spanning from metro packet/circuit aggregation to core optical networks) towards intelligent (dynamic, self-star), high-capacity, low-cost, highly-flexible, scalable, and energy-efficient software-defined optical networks seamlessly integrated with massive cloud/fog computing and storage services. To achieve this goal, it focuses on two main research lines: i) Network Control and Service Management, to introduce automated, adaptive and virtualized end-to-end network functionalities in heterogeneous multi-domain networks based on the Software Defined Networking (SDN) and Network Function Virtualization (NFV) paradigms; ii) Optical Transmission and Subsystems to provide SDN-enabled, adaptive and resource-efficient multi-dimensional transmission systems based on optical OFDM for dynamic and scalable elastic optical networks, as well as advanced performance monitoring and impairment mitigation techniques.
Demonstration and validation of proof of concepts are performed by means of the ADRENALINE Testbed®, an experimental infrastructure designed and developed by the CTTC ONS Department to conduct cutting-edge research activities in the context of: i) end-to-end SDN and NFV services integrating cloud, metro and core networks; ii) coherent and direct detection Optical OFDM systems for backhaul and backbone networks.
Scientific Publications & PatentsJournals
L. Nadal, M. Svaluto Moreolo, J. M. Fabrega, A. Dohhan, H. Griesser, M. Eiselt, J. Elbers, DMT Modulation with Adaptive Loading for High Bit Rate Transmission Over Directly Detected Optical Channels, Journal of Lightwave Technology, Vol. 32, No. 21, pp. 3541-3551, November 2014.
L. Nadal, M. Svaluto Moreolo, J. M. Fabrega, G. Junyent, Low complexity PAPR reduction techniques for clipping and quantization noise mitigation in direct-detection O-OFDM systems, Optical Fiber Technology, Vol. 20, No. 3, pp. 208–216, June 2014.
L. Gifre, F. Paolucci, A. Aguado, R. Casellas, A.Castro, F. Gugini, P. Catoldi, L.Velasco, V. López, Experimental assessment of in-operation spectrum defragmentation, Springer Photonic Networks Communications, Vol. 27, No. 3, pp. 128-140, June 2014.
R. Muñoz, R. Casellas, R. Vilalta, R. Martínez, Dynamic and Adaptive Control Plane Solutions for Flexi-grid Optical Networks based on Stateful PCE, Journal of Lightwave Technology, Vol. 32, No. 16, pp. 2703-2715, June 2014.
A. Mayoral, V. López, O. Gertsel, E. Palkopoulou, J. Pedro Fernandez-Palacios, O. Gonzalez de Dios, Minimizing resource protection in IP over WDM networks: Multi-layer Shared Backup Router, Journal of Optical Communications and Networking, Vol. 7, March 2014.
R. Muñoz, R. Casellas, R. Martínez, R. Vilalta, PCE: What is It, How Does It Work and What are its Limitations?, IEEE/OSA Journal of Lightwave Technology, Vol. 32, No. 4, pp. 528-543, February 2014.
A. Castro, R. Martínez, R. Casellas, L. Velasco, R. Muñoz, R. Vilalta, J. Comellas, Experimental Assessment of Bulk Path Restoration in Multi-layer Networks using PCE-based Global Concurrent Optimization, Journal of Lightwave Technology, Vol. 32, No. 1, pp. 81-90, January 2014.
L. Liu, W. Peng, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, R. Muñoz, S. J. B. yoo, Design and performance evaluation of an OpenFlow-based control plane for software-defined elastic optical networks with direct-detection optical OFDM (DDO-OFDM) transmission, Optics Express, Vol. 22, No. 1, pp. 30-40, January 2014.
L. Velasco, D. King, O. Gerstel, R. Casellas, A. Castro, V. Lopez, In-operation Network Planning, IEEE Communications Magazine, Vol. 52, No. 1, pp. 52-60, January 2014.
Conferences
K. I. Kitayama, R. Muñoz, STRAUSS Year1 Project Results, in Proceedings of 5th EU-Japan Symposium in ICT Research and Innovation, 16-17 October 2014 (Brussels).
A. Dochhan, H. Grießer, L. Nadal, M. Eiselt, M. Svaluto Moreolo, J. Elbers, Discrete Multitone Transmission in the Presence of Optical Noise, Chromatic Dispersion and Narrow-band Optical Filtering, in Proceedings of the 11th ITG Conference Speech Communication, 24-26 September 2014, Erlangen (Germany).
R. Casellas, R. Muñoz, R. Martínez, R. Vilalta, L. Liu, T. Tsuritani, I. Morita, Interworking of GMPLS and OpenFlow Domains: Overarching Control of Flexi Grid Optical Networks, in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
A. Mayoral, R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, F. J. Vilchez, Integrated IT and Network Orchestration Using OpenStack, OpenDaylight and Active Stateful PCE for Intra and Inter Data Center Connectivity, in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, V. López, D. López, Transport PCE Network Function Virtualization, in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
R. Muñoz, R. Vilalta, R. Casellas, R. Martínez, F. Francois, M. Channegowda, S. Peng, R. Nejabati, D. Simeonidou, N. Yoshikane, T. Tsuritani, V. López, A. Autenrieth, Experimental Assessment of ABNO-based Network Orchestration of end-to-end Multi-layer (OPS/OCS) Provisioning across SDN/OpenFlow and GMPLS/PCE Control Domains, in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
R. Martínez, L. Gifre, R. Casellas, L. Velasco, R. Muñoz, R. Vilalta, Experimental Validation of Active Frontend – Backend Stateful PCE Operations in Flexgrid Optical Network Re-optimization, in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
M. Svaluto Moreolo, J. M. Fabrega, F. J. Vilchez, K. Christodoulopoulos, E. Varvarigos, V. López, J. P. Fernández-Palacios, Assessment of Flexgrid Technologies in the MAN for Centralized BRAS Architecture Using S-BVT, in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
L. Liu, W. Ren Peng, R. Casellas, T. Tsuritani, I. Morita, R. Martínez, R. Muñoz, S. J. Ben Yoo, Experimental Demonstration of OpenFlow-based Dynamic Restoration in Elastic Optical Networks on GENI Testbed, , in Proceedings of European Conference on Optical Communication (ECOC 2014), 21-25 September 2014, Cannes (France).
A. Dochhan, H. Grießer, L. Nadal, M. Eiselt, M. Svaluto Moreolo, J. Elbers, Discrete Multitone Transmission for Next Generation 400G Data Center Inter-Connections , in Proceedings of the OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology 2014 (OECC/ACOFT), 6-10 July 2014, Melbourne (Australia).
R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, Performance Evaluation of Novel Resource Allocation Algorithms for Virtual Elastic Optical Networks, in Proceedings of 16th International Conference on Transparent Optical Networks (ICTON 2014), 6-10 July 2014, Graz (Austria).
A. Mayoral, R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, Experimental validation of automatic lightpath establishment integrating OpenDaylight SDN controller and Active Stateful PCE within the ADRENALINE Testbed, in Proceedings of 16th International Conference on Transparent Optical Networks (ICTON 2014), 6-10 July 2014, Graz (Austria).
J. M. Fabrega, M. Svaluto Moreolo, F. Jiménez, M. Chochol, G. Junyent, Constant Envelope Coherent Optical OFDM Transceiver for Elastic Upgrade of Transport Network, in Proceedings of 16th International Conference on Transparent Optical Networks (ICTON 2014), 6-10 July 2014, Graz (Austria).
M. Svaluto Moreolo, J. M. Fabrega, L. Nadal, F. J. Vilchez, Optical Transceiver Technologies for Inter-Data Center Connectivity, in Proceedings of 16th International Conference on Transparent Optical Networks (ICTON 2014), 6-10 July 2014, Graz (Austria).
M. Svaluto Moreolo, J. M. Fabrega, S.Yan, B. R. Rofoee, Y. Yan, E. Hugues-Salas, Y. Shu, G. Zervas, D. Simeonidou, K. Kitayama, M. Nishihara, T. Tanaka, T. Takahara, J. C. Rasmussen, L. Fernandez del Rosal, M. Schlosser, A. Macho Ortiz, V. López, J. P. Fernández-Palacios, Flexible Optical Infrastructure for Ethernet Transport: Solutions and Enabling Technologies in the ICT STRAUSS Project, in Proceedings of the European Conference on Networks and Communications (EuCNC), 23-26 June 2014, Bologna (Italy).
A. Stavdas, C. Matrakidis, T. Orphanoudakis, A. Manzalini, R. Martínez, Architectures and Technologies for Data-Center Interconnection, in Proceedings of the European Conference on Networks and Communications (EuCNC), 23-26 June 2014, Bologna (Italy).
R. Muñoz, R. Vilalta, R. Casellas, R. Martínez, L. M. Contreras, V. López, J.P. Fernández-Palacios, O. González de Dios, S. Peng, M. Channegowda, R. Nejabati, D. Simeonidou, X. Cao, N. Yoshikane, T. Tsuritani, A. Autenrieth, M. Schlosser, Network Virtualization, Control Plane and Service Orchestration of the ICT STRAUSS Project, in Proceedings of the European Conference on Networks and Communications (EuCNC), 23-26 June 2014, Bologna (Italy).
R. Casellas, R. Muñoz, R. Martínez, R. Vilalta, F. Cugini, F. Paolucci, O. González, V. López, J.P. Fernández-Palacios, R. Morro, A. Di Giglio, D. King, A. Farrel, IDEALIST Control Plane Architecture for Multi-domain Flexi-Grid Optical Networks, in Proceedings of the European Conference on Networks and Communications (EuCNC), 23-26 June 2014, Bologna (Italy).
R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, The role of PCE in Optical Network Virtualization, in Proceedings of PACE Workshop on New Uses of Path Computation Elements with the 5th International Conference on Smart Communications in Network Technologies (SaCoNeT 2014), 16 June 2014 Vilanova i la Geltrù (Spain).
R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, The STRAUSS Project and its relationship with PCE, in Proceedings of PACE Workshop on New Uses of Path Computation Elements with the 5th International Conference on Smart Communications in Network Technologies (SaCoNeT 2014), 16 June 2014 Vilanova i la Geltrù (Spain).
R. Muñoz, R. Casellas, M. Svaluto Moreolo, R. Martínez, J. M. Fabrega, R. Vilalta, F. J. Vilchez, An experimental overview on software-defined optical transmission and SDN/GMPLS networking activities in the ADRENALINE testbed, in Proceedings of III International Workshop on Trends in Optical Technologies – Towards Terabit per Second Optical Networking (WTON), 28-29 May 2014, Sao Pablo (Brasil).
M. Svaluto Moreolo, J. M. Fabrega, L. Nadal, F. J. Vilchez, V. López, J. Pedro Fernández-Palacios, Cost-Effective Data Plane Solutions Based on OFDM Technology for Flexi-Grid Metro Networks Using Sliceable Bandwidth Variable Transponders, in Proceedings of 18th International Conference on Optical Networking Design and Modeling (ONDM 2014), 19-22 May 2014, Stockholm (Sweden).
J. M. Fabrega, M. Svaluto Moreolo, F. J. Vilchez, B. R. Rofoee, Y. Ou, N. Amaya, G. Zervas, D. Simeonidou, Y. Yoshida, K.-I. Kitayama, Experimental Demonstration of Elastic Optical Networking utilizing Time-Sliceable Bitrate Variable OFDM Transceiver , in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March 2014, San Francisco, CA (USA).
R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, S. Peng, M. Channegowda, T. Vlachogianis, R. Nejabati, D. E. Simeonidou, X. Cao, T. Tsuritani, I. Morita, Dynamic Multi-domain Virtual Optical Networks Deployment with Heterogeneous Control Domains, in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March, 2014, San Francisco (EEUU).
R. Muñoz, R. Vilalta, M. Svaluto Moreolo, J. M. Fabrega, R. Casellas, F. J. Vilchez, R. Martínez, S. Frigerio, A. Lometti, Dynamic Differential Delay Aware RMSA for Elastic Multi-path Provisioning in GMPLS Flexi-grid DWDM Networks, in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March, 2014, San Francisco, CA (USA).ONS
R. Casellas, R. Muñoz, R. Martínez, R. Vilalta, L. Liu, T. Tsuritani, I. Morita, V. López, O. González de Dios, J. P. Fernández-Palacios, SDN based Provisioning Orchestration of OpenFlow/GMPLS Flexi-grid Networks with a Stateful Hierarchical PCE, in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March, 2014, San Francisco, CA (USA).
A. Dochhan, L. Nadal, H. Griesser, M. Eiselt, M. Svaluto Moreolo, J.P. Elbers, Experimental Investigation of Discrete Multitone Transmission in the Presence of Optical Noise and Chromatic Dispersion, in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March 2014, San Francisco, CA (USA).
R. Casellas, R. Muñoz, R. Martínez, R. Vilalta, A broader view of GMPLS/PCE and SDN , in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March 2014, San Francisco, CA (USA).
A. Mayoral, V. López, O. Gertsel, E. Palkopoulou, J.P Fernández-Palacios, O. Gonzalez de Dios, Minimizing resource protection in IP over WDM networks: Multi – layer Shared Backup Router, in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March 2014, San Francisco, CA (USA).
Y.Yoshida, A. Maruta, K. Kitayama, M. Nishihara, T. Tanaka, T. Takahara, J. C. Rasmussen, N. Yoshikane, T. Tsuritani, I. Morita, S. Yan, Y. Shu, M. Channegowda, Y. Yan, B.R. Rofoee, E. Hugues-Salas, G. Saridis, G. Zervas, R. Nejabati, D. Simeonidou, R. Vilalta, R. Muñoz, R. Casellas, R. Martínez, M. Svaluto Moreolo, J. M. Fabrega, A. Aguado, V. López, J. Marhuenda, O. González de Dios, J. P. Fernández-Palacios, First international SDN-based Network Orchestration of Variable capacity OPS over Programmable Flexi-grid EON, in Proceedings of Optical Fiber Communication Conference and Exposition (OFC), 9-13 March 2014, San Francisco, CA (USA).
R. Vilalta, STRAUSS Optical Network Virtualization Architecture, in Proceedings of workshop on Future Internet and Cloud Computing collocated with Future Internet Assembly (FIA), 17-20 March 2014, Athens (Greece).
R. Muñoz, R. Casellas, R. Martínez, R. Vilalta, M. Svaluto Moreolo, J. M. Fabrega, F. J. Vilchez, Research activities on flexible optical infrastructure and SDN for network convergence, virtualization and inter-datacentre connectivity, in Proceedings of workshop on Future Internet and Cloud Computing collocated with Future Internet Assembly (FIA), 17-20 March 2014, Athens (Greece).
Patents
F. Galán, R. Muñoz, Method for Logical Deployment, Undeployment and Monitoring of A Target IP Network, Granted patent: USA 8.111.632, Japan 4851595, EP2098028.