Ara es mostren els items 1-20 de 30

    • A block adaptive pyramid coding system 

      Sallent Ribes, Sebastián; Torres Urgell, Lluís; Triola Espigulé, Albert (1988)
      Text en actes de congrés
      Accés obert
      In this paper we present a new block adaptive coding scheme which uses non-rectangular Laplacian Pyramid Algorithms. The proposed method JB adapted to the local image contents. The original image is broken into subimages ...
    • A non-rectangular pyramid coding system 

      Sallent Ribes, Sebastián; Torres Urgell, Lluís (1988)
      Text en actes de congrés
      Accés obert
      Rectangular sampling lattices bave been extensively applied to image coding. Sampling is a fundamental orera.tion m image coding systems as a proper selection of the sampling lattice minimizes the physica support of the ...
    • A P4-Based PON architecture for 5G 

      Haastrup, Adebanjo; Rincón Rivera, David; Sallent Ribes, Sebastián; Piney da Silva, José Ramón (2018)
      Comunicació de congrés
      Accés obert
    • 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 obert
      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 ...
    • Algoritmo distribuido para la asignación dinámica de recursos en redes EPON 

      Gutiérrez González, Lluís; Andrade Jardín, Marilet de; Sallent Ribes, Sebastián; Garfias Hernandez, Paola (2009-09)
      Text en actes de congrés
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    • An adaptive pyramid image coding system 

      Torres Urgell, Lluís; Sallent Ribes, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 1988)
      Text en actes de congrés
      Accés obert
      The Laplacian Pyramid is a new and efficient method for image encoding. The method is of increasing interest as band-pass pyramids and multiresolution images are being used in other image processing applications. The Pyramid ...
    • An adaptive solution for Wireless LAN distributed power saving modes 

      Camps Mur, Daniel; Pérez-Costa, Xavier; Sallent Ribes, Sebastián (2009-12)
      Article
      Accés restringit per política de l'editorial
      The current trend to incorporate the Wireless LAN technology in increasingly smaller mobile devices poses new challenges, in terms of QoS and power consumption requirements, for the design of such devices. IEEE 802.11 ...
    • An energy-efficient distributed dynamic bandwidth allocation algorithm for Passive Optical Access Networks 

      Khalili, Hamzeh; Rincón Rivera, David; Sallent Ribes, Sebastián; Piney da Silva, José Ramón (2020-03-13)
      Article
      Accés obert
      The rapid deployment of passive optical access networks (PONs) increases the global energy consumption of networking infrastructure. This paper focuses on the minimization of energy consumption in Ethernet PONs (EPONs). ...
    • An integrated SDN-based architecture for Passive Optical Networks 

      Khalili, Hamzeh; Rincón Rivera, David; Sallent Ribes, Sebastián; Piney da Silva, José Ramón (InTech, 2018-09-19)
      Capítol de llibre
      Accés obert
      Passive Optical Network (PON) are often managed by non-flexible, proprietary network management systems. Software Defined Networking (SDN) opens the way for a more efficient operation and management of networks. We describe ...
    • Design considerations for an energy-aware SDN-based architecture in 5G EPON nodes 

      Khalili, Hamzeh; Sayyad Khodashenas, Pouria; Rincón Rivera, David; Siddiqui, Shuaib; Piney da Silva, José Ramón; Sallent Ribes, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In the evolution of telecommunication industry towards 5G, Ethernet Passive Optical Networks (EPON) technology, with some unique features such as high capacity, low latency, and minimum cost per bit, positions itself as ...
    • Detección automática de contornos en imágenes ecocardiográficas 

      Gasull Llampallas, Antoni; Marqués Acosta, Fernando; Sallent Ribes, Sebastián; Torres Urgell, Lluís; Vidal Sans, Josep (Asociación Española de Reconocimiento de Formas y Análisis de Imágenes, 1988)
      Text en actes de congrés
      Accés obert
    • Distributed Resources Assignment for Optical Burst Switching without Wavelength Conversion (Invited Paper) 

      Cervelló Pastor, Cristina; Triay Marquès, Joan; Sallent Ribes, Sebastián (2009-09)
      Text en actes de congrés
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      The amount of bursty Internet traffic leads to develop new architectures and technologies, such as Optical Burst Switching (OBS), to efficiently satisfy future bandwidth requirements. Burst loss probability is an important ...
    • Efficient time gating in ultrafast optical TDM networks 

      Yazdani, Arash; Rincón Rivera, David; Sallent Ribes, Sebastián (2014-12-01)
      Article
      Accés restringit per política de l'editorial
      Ultrafast optical communication is the backbone of high-speed global networking infrastructure. Optical time division multiplexing (OTDM) is a popular technique for embedding data from many simultaneous users on a single ...
    • Enhanced DBA to provide QoS to coexistent EPON and 10G-EPON networks 

      Garfias Hernandez, Paola; Gutiérrez González, Lluís; Sallent Ribes, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Article
      Accés restringit per política de l'editorial
      The evolution of the Ethernet passive optical network (EPON) to the enhanced 10G-EPON standard looks poised to maintain its position as the leading fiber to the home technology worldwide. Fair bandwidth allocation ...
    • Extending openflow for SDN-enabled synchronous ethernet networks 

      Suárez Marín, Raúl; Rincón Rivera, David; Sallent Ribes, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      There is an increasing need of synchronization and clock frequency distribution in core and access networks. Synchronous Ethernet (SyncE) is a technology that is able to distribute clock frequency over Ethernet networks, ...
    • Flexible joint scheduling DBA to promote the fair coexistence in 1G and 10G EPONs 

      Gutiérrez González, Lluís; Garfias Hernandez, Paola; Sallent Ribes, Sebastián (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The Next Generation Access Networks (NGAN) are the new step forward to deliver broadband services and to facilitate the integration of different technologies. The real challenge faced by 10GEPON new standard IEEE 803.3av ...
    • Fully Synchronous SDN (FSS): towards synchronization-as-a-service in 5G networks 

      Suárez Feijóo, Raúl; Rincón Rivera, David; Agustí Torra, Anna; Sallent Ribes, Sebastián (Unión Científica Internacional de Radio (URSI), 2018)
      Text en actes de congrés
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      Many modern telecommunications systems rely on strict timing and synchronization requirements. Synchronous Ethernet (SyncE) and Precision Time Protocol (PTP) are widely used to provide frequency and phase synchronization ...
    • Integration of Optical and Wireless Technologies in the Metro-Access: QoS Support and Mobility Aspects 

      Cervelló Pastor, Cristina; Sallent Ribes, Sebastián; Gutiérrez González, Lluís; Remondo Bueno, David; Nunes, Mario; Sargento, Susana; Cesana, Matteo; Filippini, Ilario; Triay Marquès, Joan; Agustí Torra, Anna; Andrade Jardín, Marilet de (2009-07)
      Comunicació de congrés
      Accés obert
    • La Internet del Futur: Anàlisi retrospectiva, reflexió i posicionament estratègic 

      Serra Hurtado, Arturo; Alcober Segura, Jesús Ángel; Cervelló Pastor, Cristina; Domingo Pascual, Jordi; Fernández, Gabriel; Junyent Giralt, Gabriel; Oliver, Miquel; Paradells Aspas, Josep; Sallent Ribes, Sebastián (2008-07)
      Report de recerca
      Accés obert
      Aquest treball té com a objectiu analitzar la situació actual de la Internet, per proposar noves alternatives i dibuixar un possible camí cap a la Internet del Futur. Aquesta anàlisi vol ser un punt de partida, un document ...
    • Leveraging 802.11n frame aggregation to enhance QoS and power consumption in Wi-Fi networks 

      Camps Mur, Daniel; Gomony, M.D.; Pérez Costa, Xavier; Sallent Ribes, Sebastián (2012-08-16)
      Article
      Accés restringit per política de l'editorial
      The Wi-Fi technology, driven by its tremendous success, is expanding into a wide variety of devices and applications. However, many of these new devices, like handheld devices, pose new challenges in terms of QoS and ...