Browsing by Subject "Comunicacions òptiques"

Now showing items 1-20 of 684

    • 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 

      Seyfettin Demirkol, Ilker; 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, Raul; 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 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)
      External 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 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 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 ...

    • A novel predictive PCE-based protection strategy for resilient transport networks 

      Ramirez, William Fred; Masip Bruin, Xavier; Marín Tordera, Eva (2015-11-21)
      Article
      Open Access
      © 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)
      Conference report
      Restricted access - publisher's policy
      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 novel wake-up communication system using solar panel and visible light communication 

      Carrascal, Carolina; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      One of the most promising energy-efficient communication methods is the use of wake-up receivers. In this paper, we propose and develop a novel wake-up communication system that uses Visible Light Communication (VLC) and ...

    • 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
      Open Access
      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)
      Conference report
      Open Access
      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
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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 ...