Browsing by Subject "Optical communications"

Now showing items 1-20 of 752

    • 1Gb/s service planning on standard PON technologies 

      Larrabeiti, David; Sánchez, Rafael; Hernández, José A. (2017-06)
      Audiovisual
      Open Access
      Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).

    • 1Gbps full-duplex links for ultra-dense-WDM 6.25GHz frequency slots in optical metro-access networks 

      Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Lerin, Adolfo; Sotelo, Félix; Garces, Ignacio (2016-01-11)
      Article
      Open Access
      1Gbps full-duplex optical links for 6.25GHz ultra dense WDM frequency slots are demonstrated and optimized for cost-effective metro-access networks. The OLT-ONU downlinks are based on 1Gbps Nyquist-DPSK using MZM and ...

    • 25Gbps quasicoherent receiver for beyond NG-PON2 access networks 

      Altabas, Jose Antonio; Suhr, Lau F.; Silva Valdecasa, Guillermo; Lázaro Villa, José Antonio; Garces, Ignacio; Jensen, J.B.; Clausen, Anders T. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      A 25Gbps quasicoherent receiver with simple DSP has been experimentally validated for 25G access networks. It exhibits a sensitivity of -24. 7dBm after 20km SSMF and duobinary decoding and provides a power budget of 25. 7dB.

    • 5G transport network blueprint and dimensioning for a dense urban scenario 

      Demirkol, Ilker Seyfettin; Camps Mur, Daniel; Bartelt, Jens; Zou, Jim (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      In this paper, we provide a quantitative evaluation of the deployment aspects and dimensioning of the 5G transport architecture in a representative European city. In particular, we select an example dense urban city scenario ...

    • 7.5 Gb/s direct DFB phase modulation with 8-DPSK for 6.25 GHz spaced coherent UDWDM-PONs 

      Cano Valadez, Iván Nicolás; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      We demonstrate an 8-DPSK directly phase-modulated DFB with intradyne detection in a 50 km, 6.25 GHz channel spaced UDWDM-PON. A bit rate of 7.5 Gb/s is achieved with Rx sensitivity of -31 dBm at BER=10-3.

    • A case of acquisition, transmission and use of information to control a manufacturing process 

      Fernández Román, Laura (Universitat Politècnica de Catalunya, 2009-10-08)
      Master thesis
      Open Access

    • A Comparison of Nonlinear Media for All-Optical Signal Processing 

      Martínez Díaz, Jordi (Universitat Politècnica de Catalunya / Technical University of Denmark. Fotonik Department / Politecnico di Torino. Dipartimento di elettronica, 2013-07-31)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Politecnico di Torino
      [ANGLÈS] This thesis is focused on benchmarking different nonlinear media that are currently used for all-optical signal processing. The materials survey has been based on both low linear losses and highly nonlinear ...

    • A control and management architecture supporting autonomic NFV services 

      Velasco Esteban, Luis Domingo; Casellas Regi, Ramón; Llana, Sergio; Gifre Renom, Lluís; Martínez Rivera, Ricardo Victor; Vilata, Ricard; Muñoz González, Raül; Ruiz, Marc (2019-02)
      Article
      Open Access
      The proposed control, orchestration and management (COM) architecture is presented from a high-level point of view; it enables the dynamic provisioning of services such as network data connectivity or generic network slicing ...

    • A discrete bit loading algorithm for FBMC/OQAM 

      Caus López, Marius; Pérez Neira, Ana Isabel; García Armada, Ana (2012-06)
      Article
      Restricted access - publisher's policy
      In this letter the discrete rate maximization problem is investigated for FBMC/OQAM. The analysis reveals that if there is crosstalk certain bit allocations violate the power constraints. Aiming at ensuring the feasibility ...

    • A distributed telemetry architecture for optical networks 

      González Pacheco, Pol; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Conference report
      Open Access
      A distributed telemetry system is proposed with agents receiving and analyzing data before sending to a centralized manager. Intelligent data aggregation on optical constellations telemetry largely reduces data rate without ...

    • A feedback-based hybrid OBS/OCS architecture with fast-over-slow capability 

      Khodashenas, Pooria Saiyad; Perelló Muntan, Jordi; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2011)
      Conference lecture
      Open Access
      Dynamic bandwidth allocation in response to the bandwidth requirements of new emerging applications is an essential demand for future optical networks. Hybrid switching architectures combining the benefits of different ...

    • A fully SDN enabled all-optical architecture for data centre virtualisation with time and space multiplexing 

      Kondepu, K; Jackson, Chirs; Ou, Y; Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-01)
      Article
      Open Access
      Virtual Data Centre (VDC) solutions provide an environment that is able to quickly scale-up and where virtual machines and network resources can be quickly added on-demand through self-service procedures. VDC providers ...

    • A GMPLS/OBS network architecture enabling QoS-aware end-to-end burst transport 

      Pedroso, Pedro; Perelló Muntan, Jordi; Spadaro, Salvatore; Careglio, Davide; Solé Pareta, Josep; Klinkowski, Miroslaw (2010-07-01)
      Research report
      Open Access
      This paper introduces a Generalized Multi-Protocol Label Switching (GMPLS)-enabled Optical Burst Switched (OBS) network architecture featuring end-to-end QoS-aware burst transport services. This is achieved by setting up ...

    • A GRASP-based heuristic to design the GMPLS control plane network topology with resilience guarantees 

      Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Junyent Giralt, Gabriel; Comellas Colomé, Jaume (IEEE Press. Institute of Electrical and Electronics Engineers, 2008)
      Conference report
      Restricted access - publisher's policy
      The control plane topology has traditionally followed that of the data plane and therefore the design of the former, as well as its resilience, has been addressed in the latter's one. Owing to the fact that a clear separation ...

    • A hybrid packet/circuit optical transport architecture for DCN 

      Panahi, Nogol; Careglio, Davide; Solé Pareta, Josep (2019)
      Conference report
      Open Access
      The aim of this paper is to move away from today's multi-tier, manually operated, and performance limited Data Centre Network (DCN) towards more scalable, flexible, and optimized architecture of tomorrow. We propose a new ...

    • A latency-aware real-time video surveillance demo: network slicing for improving public safety 

      Shariati, Mohammad Behnam; Pedreno Manresa, José Juan; Dochhan, Annika; Siddique Muqaddas, Abubakar; Casellas Regi, Ramon; González de Dios, Oscar; Luque Canto, L.; Lent, Bodo; López de Vergara Méndez, Jorge Enrique; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      We report the automated deployment of 5G services across a latency-aware, semi- disaggregated, and virtualized metro network. We summarize the key findings in a detailed analysis of end-to-end latency, service setup time, ...

    • A multiobjective wavelength routing approach combining network and traffic engineering with energy awareness 

      Palmieri, Francesco; Ricciardi, Sergio; Fiore, Ugo; Castiglione, Aniello; Careglio, Davide (2017-12-01)
      Article
      Open Access
      In modern optical networks, infrastructure management is faced with the challenge of using expensive equipment and communication resources as efficiently as possible. This now includes keeping power consumption costs at a ...

    • A new flexible ONU design for UDWDM-PON with coherent transceivers and smart activation process 

      Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Prat Gomà, Josep Joan; Pous, R. (2014)
      Conference report
      Restricted access - publisher's policy
      We present a novel ONU architecture for coherent UDWDM-PON with randomly distributed ONU wavelengths. The ONU is built with one or two lasers exhibiting simple limited thermal tunability in a specific optical band, where ...

    • A New Parametric Regenerator Allocation Scheme taking into account Inaccurate Physical Information 

      Marín Tordera, Eva; Yannuzzi, Marcelo; Serral Gracià, René; Masip Bruin, Xavier; Sánchez López, Sergio (2010-06-08)
      Conference report
      Open Access
      Regenerator allocation consists on selecting which of the already installed regenerators in a translucent network may be used according to the dynamic traffic requests in order to maximize the quality of the optical ...

    • A novel impairment aware RWA algorithm with consideration of QoT estimation inaccuracy 

      Azodolmolky, Siamak; Pointurier, Yvan; Angelou, Marianna; Careglio, Davide; Solé Pareta, Josep; Tomkos, Ioannis (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-04)
      Article
      Restricted access - publisher's policy
      In all-optical networks the physical layer impairments accumulate along a lightpath and also vary dynamically, and a number of impairment aware routing and wavelength assignment (IA-RWA) techniques have been proposed in ...