Browsing by Subject "Optical communications"

Now showing items 21-40 of 755

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

      Ramirez Almonte, Wilson; 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 wake-up communication system using solar panel and visible light communication 

      Carrascal, Carolina; Demirkol, Ilker Seyfettin; 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 P4-based SDN architecture for passive optical networks 

      Gonzalez Campos, Gabriel (Universitat Politècnica de Catalunya, 2021-07-15)
      Bachelor thesis
      Restricted access - confidentiality agreement

    • 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 reinforcement learning algorithm for optimalVirtual network functions allocations among 5G edge computing centers 

      Ruiz de Mendoza, Carlos Ausias (Universitat Politècnica de Catalunya, 2021-07-14)
      Master thesis
      Open Access
      Covenantee:   Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
      The fifth generation (5G) mobile networks are enabling operators and stakeholders to enhance and innovate new services in response to an increasing market demand. 5G architecture provides scalability and flexibility for ...

    • 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 ...

    • 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
      Restricted access - publisher's policy
      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 Techno-Economic study of network coding protection schemes 

      Ramirez Almonte, Wilson; Masip Bruin, Xavier; Marín Tordera, Eva; Yannuzzi, Marcelo; Martínez Manzanilla, Anny Gabriela; Sánchez López, Sergio; Siddiqui, Shuaib; López Álvarez, Victor (2014)
      Conference report
      Restricted access - publisher's policy
      The recent advances in optical technologies pave the way to the deployment of high-bandwidth services. As reliability becomes a mandatory requirement for some of these services, network providers must endow their networks ...

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

    • A universal specification for multicore fiber crosstalk 

      Gené Bernaus, Joan M.; Winzer, Peter J. (2019-05-01)
      Article
      Open Access
      In order to transition multi-core fiber (MCF) technologies from their research state to volume production, the key design specifications have to be broadly agreed upon, first and foremost an acceptable level of inter-core ...

    • 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
      Open Access
      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 ...

    • Accurate low complex modulation format and symbol rate identification for autonomous lightpath operation 

      Sequeira, Diogo Gonçalo; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (2022-11-28)
      Article
      Open Access
      Network automation promises to reduce costs while guaranteeing the required performance; this is paramount when dealing with the forecasted highly dynamic traffic that will be generated by new 5G/6G applications. In optical ...

    • Achievable data rate of coordinated multi-point transmission for visible light communications 

      Dowhuszko, Alexis; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      This paper studies the sum data rate that a Visible Light Communication (VLC) system with multiple users canachieve when phosphor-converted white LED panels are usedto provide illumination and communication simultaneously. ...

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

    • Active PCE demonstration performing elastic operations and hitless defragmentation in flexible grid optical networks 

      Paolucci, Francesco; Castro Casales, Alberto; Fresi, Francesco; Imran, Muhammad; Giorgetti, Alessio; Bhownik, Bishanka Brata; Berrettini, Gianluca; Meloni, Gianluca; Cugini, Filippo; Velasco Esteban, Luis Domingo; Poti, Luca; Castoldi, Piero (2015-02-01)
      Article
      Restricted access - publisher's policy

    • Actuation framework for 5G-enabled network slices with QoE/QoS guarantees 

      Montero, Rafael; Agraz Bujan, Fernando; Pagès Cruz, Albert; Spadaro, Salvatore (2019)
      Conference report
      Restricted access - publisher's policy
      Network slicing is identified as the enabling technology for efficient service delivery in future 5G networks. Moreover, a key aspect in 5G network slicing relates to the delivery and maintenance of QoS/QoE guarantees for ...

    • Adaptive beamwidth optimization under Doppler ICI and positioning errors at mmWave bands 

      Ballesteros Sánchez, Christian; Pfadler, Andreas; Montero Bayo, Luca; Romeu Robert, Jordi; Jofre Roca, Lluís (Elsevier, 2022-04-01)
      Article
      Open Access
      The growing trends towards massive antenna arrays with focusing capabilities has enabled the use of higher frequencies at the cost of more complex systems. In the particular case of vehicular communications, millimeter-wave ...

    • Adaptive burst admission and forwarding in OBS networks 

      Rumley, Sébastien; Pedrola Escribà, Òscar; Klinkowski, Miroslaw; Pedroso, Pedro; Gaumier, Christian; Careglio, Davide; Solé Pareta, Josep (IEEE, 2009-07-31)
      Conference report
      Open Access
      This paper addresses the problem of controlling the performance of optical burst switching (OBS) networks in presence of non-stationary traffic demands. We propose a joint burst admission control and forwarding mechanism ...