Now showing items 1-20 of 29

  • A block adaptive pyramid coding system 

    Sallent Ribes, Sebastián; Torres Urgell, Lluís; Triola Espigulé, Albert (1988)
    Conference report
    Open Access
    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 ...
  • 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)
    Conference report
    Open Access
  • An adaptive pyramid image coding system 

    Torres Urgell, Lluís; Sallent Ribes, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 1988)
    Conference report
    Open Access
    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
    Restricted access - publisher's policy
    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 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)
    Part of book or chapter of book
    Open Access
    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 ...
  • A non-rectangular pyramid coding system 

    Sallent Ribes, Sebastián; Torres Urgell, Lluís (1988)
    Conference report
    Open Access
    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)
    Conference lecture
    Open Access
  • 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
    Restricted access - publisher's policy
    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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Open Access
  • Distributed Resources Assignment for Optical Burst Switching without Wavelength Conversion (Invited Paper) 

    Cervelló Pastor, Cristina; Triay Marquès, Joan; Sallent Ribes, Sebastián (2009-09)
    Conference report
    Open Access
    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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference lecture
    Open Access
  • 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)
    External research report
    Open Access
    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
    Restricted access - publisher's policy
    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 ...
  • Media Layer: redesigning the Internet as the media network of the future 

    Miguélez Ortiz, Xavier; Iglesias Gracia, Francisco Javier; Lorente Adamuz, Pedro; Alcober Segura, Jesús Ángel; Serra Hurtado, Arturo; Sallent Ribes, Sebastián (2008-05)
    External research report
    Open Access