The Experts below are selected from a list of 8970 Experts worldwide ranked by ideXlab platform
Lorenzo Pavesi - One of the best experts on this subject based on the ideXlab platform.
-
Methods for Low Crosstalk and Wavelength Tunability in Arrayed-Waveguide Grating for On-Silicon Optical Network
Journal of Lightwave Technology, 2017Co-Authors: Stefano Tondini, Claudio Castellan, Mattia Mancinelli, Christophe Kopp, Lorenzo PavesiAbstract:Arrayed waveguide gratings (AWGs) are used to accomplish complex functionalities in dense wavelength division multiplexing Networks, as well as in signal processing, measurement, characterization or sensing. In this work, we discuss the design and the experimental characterization of a 6 x 400 GHz channel-spaced AWG to be used as wavelength multiplexer/demultiplexer in a silicon-on-insulator based Optical Transport Network. We adopted a whiskered-shaped star coupler design to investigate how the reduction in the reflectivity of the free propagation region boundaries affects the overall performances of the AWG. We demonstrated 2.9 dB insertionloss, which does not include fiber coupling loss, and (-24.4 +/- 0.1) dB crosstalk for a design realized with a single etching technique. Moreover, we demonstrated an efficient fine-tuning (7.5 nm/W) of the spectral position of the AWG output channels.
Raul Munoz - One of the best experts on this subject based on the ideXlab platform.
-
Experimental evaluation of dynamic resource orchestration in multi-layer (packet over flexi-grid Optical) Networks
Photonic Network Communications, 2020Co-Authors: Silvia Fichera, Raul Munoz, Ricard Vilalta, Ramon Casellas, Ricardo Martinez, Barbara Martini, Molka Gharbaoui, Piero CastoldiAbstract:Network services in 5G will be rolled out as pools of virtual Network functions (VNFs) exploiting the advantages of both software-defined Networking and Network function virtualization. In this context, 5G Network services are envisaged as ordered sequences of VNFs resulting in the so-called VNF Forwarding Graphs (VNFFGs). Such VNFs can be allocated over a number of distributed but interconnected data centers (DCs). In this work, a cloud/Network orchestrator is discussed to dynamically process and accommodate VNFFG requests over a pool of DCs interconnected by a multi-layer (packet/flexi-grid Optical) Transport Network infrastructure. Two different cloud and Network resource allocation algorithms are proposed aiming at: (1) minimizing the distance between the selected DCs and (2) minimizing the load (i.e., consumed cloud resources) of the chosen DCs. In the performance evaluation, the proposed algorithms are experimentally validated and compared on the CTTC ADRENALINE testbed.
-
enabling Network slicing across a disaggregated Optical Transport Network
Optical Fiber Communication Conference, 2019Co-Authors: Ramon Casellas, Ricard Vilalta, Ricardo Martinez, A Giorgetti, R Morro, Raul MunozAbstract:We propose and implement a Network virtualization architecture for open Optical (partially) disaggregated Networks, based on a device hypervisor and OpenConfig and OpenROADM data models, in support of 5G Network slicing over interconnected NFVI-PoPs.
-
EuCNC - The ADRENALINE testbed: An SDN/NFV packet/Optical Transport Network and edge/core cloud platform for end-to-end 5G and IoT services
2017 European Conference on Networks and Communications (EuCNC), 2017Co-Authors: Raul Munoz, Josep Maria Fàbrega, Laia Nadal, Michela Svaluto Moreolo, Arturo Mayoral, Ricard Vilalta, Ramon Casellas, Ricardo Martinez, Fco. Javier VílchezAbstract:The fifth generation of mobile Networks (5G) and the internet of Things (IoT) impose very stringent requirements to the Optical Transport Networks. On the one hand, high flexibility, ultra-low latency and high capacity, in order to support the forecasted 1000x growth in mobile data traffic with latencies below millisecond. On the other hand, massive edge and core cloud infrastructure integrated with the Transport Network to dynamically deploy NFV, MEC, and IoT analytics. This paper presents ADRENALINTE testbed, an SDN/NFV packet/Optical Transport Network and edge/core cloud platform for end-to-end 5G and IoT services.
-
the adrenaline testbed an sdn nfv packet Optical Transport Network and edge core cloud platform for end to end 5g and iot services
European Conference on Networks and Communications, 2017Co-Authors: Raul Munoz, Josep Maria Fàbrega, Laia Nadal, Michela Svaluto Moreolo, Arturo Mayoral, Ricard Vilalta, Ramon Casellas, Ricardo Martinez, Fco. Javier VílchezAbstract:The fifth generation of mobile Networks (5G) and the internet of Things (IoT) impose very stringent requirements to the Optical Transport Networks. On the one hand, high flexibility, ultra-low latency and high capacity, in order to support the forecasted 1000x growth in mobile data traffic with latencies below millisecond. On the other hand, massive edge and core cloud infrastructure integrated with the Transport Network to dynamically deploy NFV, MEC, and IoT analytics. This paper presents ADRENALINTE testbed, an SDN/NFV packet/Optical Transport Network and edge/core cloud platform for end-to-end 5G and IoT services.
-
Integrating Optical Transport Network testbeds and cloud platforms to enable end-to-end 5G and IoT services
International Conference on Transparent Optical Networks, 2017Co-Authors: Raul Munoz, Arturo Mayoral, Ricard Vilalta, Ramon Casellas, Ricardo MartinezAbstract:This paper provides an overview of different experimental SDN/NFV control and orchestration architectures aiming at integrating the multi-layer (packet/Optical) Transport Networks and distributed DC infrastructures (core cloud, edge computing) of the ADRENALINE testbed. The proposed SDN/NFV solutions enable the development and testing of end-to-end 5G and IoT services supporting a wide variety of use cases from different vertical industries, such as automotive, e-health, energy, media or smart cities. To this end, the ADRENALINE testbed is adopting the following technologies to meet the stringent requirements of 5G and IoT; i) high-capacity, flexible and cost/energy-efficient software-defined Optical transmission technologies for access, metro and core Networks; ii) highly-scalable packet technologies for aggregation and switching of flows with quality of service (QoS); iii) core datacenters and edge computing for the deployment of virtualized Network functions (VNFs) and cloud services.
Stefano Tondini - One of the best experts on this subject based on the ideXlab platform.
-
Methods for Low Crosstalk and Wavelength Tunability in Arrayed-Waveguide Grating for On-Silicon Optical Network
Journal of Lightwave Technology, 2017Co-Authors: Stefano Tondini, Claudio Castellan, Mattia Mancinelli, Christophe Kopp, Lorenzo PavesiAbstract:Arrayed waveguide gratings (AWGs) are used to accomplish complex functionalities in dense wavelength division multiplexing Networks, as well as in signal processing, measurement, characterization or sensing. In this work, we discuss the design and the experimental characterization of a 6 x 400 GHz channel-spaced AWG to be used as wavelength multiplexer/demultiplexer in a silicon-on-insulator based Optical Transport Network. We adopted a whiskered-shaped star coupler design to investigate how the reduction in the reflectivity of the free propagation region boundaries affects the overall performances of the AWG. We demonstrated 2.9 dB insertionloss, which does not include fiber coupling loss, and (-24.4 +/- 0.1) dB crosstalk for a design realized with a single etching technique. Moreover, we demonstrated an efficient fine-tuning (7.5 nm/W) of the spectral position of the AWG output channels.
Y Miyamoto - One of the best experts on this subject based on the ideXlab platform.
-
mode division multiplexing systems for high capacity Optical Transport Network
Optical Fiber Communication Conference, 2019Co-Authors: Y Miyamoto, Kohki Shibahara, Takayuki Mizuno, Takayuki KobayashiAbstract:This paper reviews the recent technical challenges on mode-division multiplexing (MDM) Transport systems for high-capacity Optical Transport Network. Desired features and issues of the MDM system are discussed for long-haul transmission performance over 1,000 km.
-
advanced dsp technologies with symbol rate over 100 gbaud for high capacity Optical Transport Network
Optical Fiber Communication Conference, 2018Co-Authors: Masanori Nakamura, Takayuki Kobayashi, Fukutaro Hamaoka, Asuka Matsushita, Hiroshi Yamazaki, Munehiko Nagatani, Yoshiaki Kisaka, Y MiyamotoAbstract:100-Gbaud-class systems are promising candidates for over 400-Gbps serial long-haul Transport without increasing the number of transponders. We review DSP technologies, e.g. signal generation, calibration, post compensation and advanced modulation for realizing 100-Gbaud-class transceivers.
-
over 400 gbit s digital coherent channels for Optical Transport Network
International Conference on Photonics in Switching, 2016Co-Authors: Y MiyamotoAbstract:This paper reviews the recent R&D challenges of digital coherent Optical channel transmission with channel rates over 400 Gbit/s. The promising DSP and preprocessing technologies for 1-Tbit/s channel long-haul transmission are addressed.
-
100 gb s Optical Transport Network and beyond employing digital signal processing
IEEE Communications Magazine, 2012Co-Authors: E Yamazaki, Masahito Tomizawa, Y MiyamotoAbstract:We overview the requirements and the enabling technologies for Optical transmission systems up to 100 Gb/s and beyond. Polarization- division multiplexed quadrature phase shift keying with digital coherent detection, and fast recovery in Optical channel rerouting are key technologies for 100-Gb/s long-haul systems and beyond. We review test results of a realtime 80-channel wavelength-division multiplexing transmission over 420 km of field-installed fiber. Finally, we focus on digital nonlinear compensation and pilot tone phase noise compensation as technologies for systems beyond 100 Gb/s.
-
ultra high capacity transmission for Optical Transport Network
Optical Fiber Communication Conference, 2011Co-Authors: Y MiyamotoAbstract:● DSP aided Coherent system is indispensable for future OTN evolution - PDM QPSK-based format for 10-Tb/s class OTN. ● Keys for > 10-Tb/s Capacity - High-speed channel beyond 100Gb/s ∂ Multi-Carrier modulation formats (PDM NGI CO-OFDM). ∂ Nonlinear Compensation. ∂ Photonic Integration challenges. - High spectral efficiency beyond 2 b/s/Hz ∂ Higher-order multi-level format with advanced DAC/ADC & DSP. ∂ OSNR Tolerance Enhancement by advanced DRA and FEC.
Ricardo Martinez - One of the best experts on this subject based on the ideXlab platform.
-
Experimental evaluation of dynamic resource orchestration in multi-layer (packet over flexi-grid Optical) Networks
Photonic Network Communications, 2020Co-Authors: Silvia Fichera, Raul Munoz, Ricard Vilalta, Ramon Casellas, Ricardo Martinez, Barbara Martini, Molka Gharbaoui, Piero CastoldiAbstract:Network services in 5G will be rolled out as pools of virtual Network functions (VNFs) exploiting the advantages of both software-defined Networking and Network function virtualization. In this context, 5G Network services are envisaged as ordered sequences of VNFs resulting in the so-called VNF Forwarding Graphs (VNFFGs). Such VNFs can be allocated over a number of distributed but interconnected data centers (DCs). In this work, a cloud/Network orchestrator is discussed to dynamically process and accommodate VNFFG requests over a pool of DCs interconnected by a multi-layer (packet/flexi-grid Optical) Transport Network infrastructure. Two different cloud and Network resource allocation algorithms are proposed aiming at: (1) minimizing the distance between the selected DCs and (2) minimizing the load (i.e., consumed cloud resources) of the chosen DCs. In the performance evaluation, the proposed algorithms are experimentally validated and compared on the CTTC ADRENALINE testbed.
-
enabling Network slicing across a disaggregated Optical Transport Network
Optical Fiber Communication Conference, 2019Co-Authors: Ramon Casellas, Ricard Vilalta, Ricardo Martinez, A Giorgetti, R Morro, Raul MunozAbstract:We propose and implement a Network virtualization architecture for open Optical (partially) disaggregated Networks, based on a device hypervisor and OpenConfig and OpenROADM data models, in support of 5G Network slicing over interconnected NFVI-PoPs.
-
EuCNC - The ADRENALINE testbed: An SDN/NFV packet/Optical Transport Network and edge/core cloud platform for end-to-end 5G and IoT services
2017 European Conference on Networks and Communications (EuCNC), 2017Co-Authors: Raul Munoz, Josep Maria Fàbrega, Laia Nadal, Michela Svaluto Moreolo, Arturo Mayoral, Ricard Vilalta, Ramon Casellas, Ricardo Martinez, Fco. Javier VílchezAbstract:The fifth generation of mobile Networks (5G) and the internet of Things (IoT) impose very stringent requirements to the Optical Transport Networks. On the one hand, high flexibility, ultra-low latency and high capacity, in order to support the forecasted 1000x growth in mobile data traffic with latencies below millisecond. On the other hand, massive edge and core cloud infrastructure integrated with the Transport Network to dynamically deploy NFV, MEC, and IoT analytics. This paper presents ADRENALINTE testbed, an SDN/NFV packet/Optical Transport Network and edge/core cloud platform for end-to-end 5G and IoT services.
-
the adrenaline testbed an sdn nfv packet Optical Transport Network and edge core cloud platform for end to end 5g and iot services
European Conference on Networks and Communications, 2017Co-Authors: Raul Munoz, Josep Maria Fàbrega, Laia Nadal, Michela Svaluto Moreolo, Arturo Mayoral, Ricard Vilalta, Ramon Casellas, Ricardo Martinez, Fco. Javier VílchezAbstract:The fifth generation of mobile Networks (5G) and the internet of Things (IoT) impose very stringent requirements to the Optical Transport Networks. On the one hand, high flexibility, ultra-low latency and high capacity, in order to support the forecasted 1000x growth in mobile data traffic with latencies below millisecond. On the other hand, massive edge and core cloud infrastructure integrated with the Transport Network to dynamically deploy NFV, MEC, and IoT analytics. This paper presents ADRENALINTE testbed, an SDN/NFV packet/Optical Transport Network and edge/core cloud platform for end-to-end 5G and IoT services.
-
Integrating Optical Transport Network testbeds and cloud platforms to enable end-to-end 5G and IoT services
International Conference on Transparent Optical Networks, 2017Co-Authors: Raul Munoz, Arturo Mayoral, Ricard Vilalta, Ramon Casellas, Ricardo MartinezAbstract:This paper provides an overview of different experimental SDN/NFV control and orchestration architectures aiming at integrating the multi-layer (packet/Optical) Transport Networks and distributed DC infrastructures (core cloud, edge computing) of the ADRENALINE testbed. The proposed SDN/NFV solutions enable the development and testing of end-to-end 5G and IoT services supporting a wide variety of use cases from different vertical industries, such as automotive, e-health, energy, media or smart cities. To this end, the ADRENALINE testbed is adopting the following technologies to meet the stringent requirements of 5G and IoT; i) high-capacity, flexible and cost/energy-efficient software-defined Optical transmission technologies for access, metro and core Networks; ii) highly-scalable packet technologies for aggregation and switching of flows with quality of service (QoS); iii) core datacenters and edge computing for the deployment of virtualized Network functions (VNFs) and cloud services.