Ara es mostren els items 1-20 de 553

  • 1Gb/s service planning on standard PON technologies 

    Larrabeiti, David; Sánchez, Rafael; Hernández, José A. (2017-06)
    Audiovisual
    Accés obert
    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
    Accés obert
    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 ...
  • 5G transport network blueprint and dimensioning for a dense urban scenario 

    Seyfettin Demirkol, Ilker; Camps Mur, Daniel; Bartelt, Jens; Zou, Jim (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Projecte Final de Màster Oficial
    Accés obert
  • 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)
    Projecte/Treball Final de Carrera
    Accés obert
    [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 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)
    Comunicació de congrés
    Accés obert
    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 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)
    Report de recerca
    Accés obert
    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 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
    Accés restringit per política de l'editorial
    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 ...
  • A novel predictive PCE-based protection strategy for resilient transport networks 

    Ramirez, William Fred; Masip Bruin, Xavier; Marín Tordera, Eva (2015-11-21)
    Article
    Accés obert
    © 2016. The ever increasing requirements of new Internet applications are pushing to optimize the design of optical networks. A key design criterion in network design is the ability to recover from failures in an agile and ...
  • A novel SDN enabled hybrid optical packet/circuit switched data centre network: the LIGHTNESS approach 

    Peng, Shuping; Simeonidou, Dimitra; Zervas, George; Spadaro, Salvatore; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Careglio, Davide; Becerra Fontal, Yolanda; Farreras Esclusa, Montserrat (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Current over-provisioned and multi-tier data centre networks (DCN) deploy rigid control and management platforms, which are not able to accommodate the ever-growing workload driven by the increasing demand of ...
  • A proposal for an SDN-based SIEPON architecture 

    Hamzeh, Khalili; Sallent Ribes, Sebastián; Piney da Silva, José Ramón; Rincón Rivera, David (2017-07-03)
    Article
    Accés restringit per política de l'editorial
    Passive Optical Network (PON) elements such as Optical Line Terminal (OLT) and Optical Network Units (ONUs) are currently managed by inflexible legacy network management systems. Software-Defined Networking (SDN) is a new ...
  • A quantitative evaluation of reordering in OBS networks and its impact on TCP performance 

    Perelló Muntan, Jordi; Gunreben, Sebastian; Spadaro, Salvatore (IEEE, 2008)
    Text en actes de congrés
    Accés obert
    This paper presents a layered framework to measure the reordering introduced by contention resolution strategies in OBS networks. In particular, characterization is based on the reordering metrics proposed by the IETF IPPM ...
  • A real-time MIMO-OFDM mobile WiMAX receiver: architecture, design and FPGA implementation 

    Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; López Bueno, David (2011-11)
    Article
    Accés restringit per política de l'editorial
    The IEEE 802.16e-2005 standard, also denoted as mobile WiMAX, was introduced as one of the first real efforts towards the deployment of fourth generation communication systems providing fixed and mobile broadband wireless ...
  • A routing and spectrum assignment problem in optical OFDM networks 

    Klinkowski, Miroslaw; Careglio, Davide (2011)
    Text en actes de congrés
    Accés obert
    Optical Orthogonal Frequency Division Multiplexing (O-OFDM) is a novel and attractive modulation technology enabling flexible sub-wavelength and super-channel transmission in optical networks. In an OFDM-based optical ...
  • A survey on physical layer impairments aware routing and wavelength assignment algorithms in optical networks 

    Azodolmolky, S; Klinkowski, Miroslaw; Marín Tordera, Eva; Careglio, Davide; Solé Pareta, Josep; Tomkos, Ioannis (2009-03)
    Article
    Accés restringit per política de l'editorial
    Optical networks are moving from opaque and translucnet architectures towards all-optical (transparent) architecutres. In translucent architectures a small amount of regeneration (e.g. optical-electronic-optical conversion) ...
  • A traffic intensity model for flexgrid optical network planning under dynamic traffic operation 

    Ruiz Ramírez, Marc; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We obtain a model to estimate the highest traffic intensity that a flexgrid-based network can support in dynamic scenarios. A design problem is introduced to illustrate its application. Numerical results validate both ...
  • ABNO-driven content distribution in the telecom cloud 

    Gifre Renom, Lluís; Tornatore, Massimo; Contreras Murillo, Luis Miguel; Mukherjee, Biswanath; Velasco Esteban, Luis Domingo (2017-11-01)
    Article
    Accés obert
    As current traffic growth is expected to strain capacity of today¿s metro network, novel content distribution architectures where contents are placed closer to the users are being investigated. In that regard, telecom ...
  • Access services availability and traffic forecast in PON deployment 

    Segarra Mullerat, Josep; Sales Zaragoza, Vicente; Prat Gomà, Josep Joan (IEEE, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, offered and new broadband services for residential customers are considered in Passive Optical Networks (PONs). The user bit rates together with QoS requirements are evaluated for the availability of ...
  • Achieving energy efficiency: an energy-aware approach in SDN 

    Fernández Fernández, Adriana; Cervelló Pastor, Cristina; Ochoa Aday, Leonardo (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Achieving energy efficiency has recently become an essential aim of networking research due to the ever increasing power consumption and CO2 emissions generated by large data networks. For this problem, the emerging paradigm ...