Ara es mostren els items 24-42 de 42

    • Modeling and comparison of candidate selection algorithms in opportunistic routing 

      Darehshoorzadeh, Amir; Cerdà Alabern, Llorenç (2011-09-15)
      Article
      Accés restringit per política de l'editorial
      Opportunistic Routing (OR) has been investigated in recent years as a way to increase the performance of multihop wireless networks by exploiting its broadcast nature. In contrast to traditional routing, where traffic is ...
    • Multicast delivery using opportunistic routing in wireless mesh networks 

      Darehshoorzadeh, Amir; Cerdà Alabern, Llorenç (2014-01-01)
      Article
      Accés obert
      Opportunistic routing (OR) has been proposed to improve the efficiency of unicast protocols in wireless networks. In OR, an ordered set of nodes is selected as the next-hop potential forwarders. In this paper, we investigate ...
    • On the design of hybrid DRAM/SRAM memory schemes for fast packet buffers 

      García Vidal, Jorge; March Hermo, María Isabel; Cerdà Alabern, Llorenç; Corbal San Adrián, Jesús; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2004)
      Text en actes de congrés
      Accés obert
      We address the design of a packet buffer for future high-speed routers that support line rates as high as OC-3072 (160 Gb/s), and a high number of ports and service classes. We describe a general design for hybrid DRAM/SRAM ...
    • On the Guifi.net community network economics 

      Cerdà Alabern, Llorenç; Baig Viñas, Roger; Navarro Moldes, Leandro (2020-02-26)
      Article
      Accés obert
      How costs are distributed among the participants is a key question in the management and viability of shared resources. Although all cost-sharing mechanisms are subjective and thus it is eventually up to the participants ...
    • On the maximum performance in opportunistic routing 

      Cerdà Alabern, Llorenç; Darehshoorzadeh, Amir; Pla Boscà, Vicent (IEEE Computer Society Publications, 2010)
      Text en actes de congrés
      Accés obert
      In recent years there has been a growing interest in Opportunistic Routing as a way to increase the capacity of wireless networks by exploiting its broadcast nature. By contrast to traditional uni-path routing, in opportunistic ...
    • On the performance modeling of opportunistic routing 

      Cerdà Alabern, Llorenç; Pla Boscà, Vicent; Darehshoorzadeh, Amir (ACM Press. Association for Computing Machinery, 2010-02-22)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper we propose a discrete time Markov model to assess the improvement that may be achieved using opportunistic routing. We show that our model can be used to compute the probability distribution and moments of ...
    • On the performance of QUIC over wireless mesh networks 

      Manzoor, Jawad; Cerdà Alabern, Llorenç; Sadre, Ramin; Drago, Idilio (2020-10)
      Article
      Accés obert
      The exponential growth in adoption of mobile phones and the widespread availability of wireless networks has caused a paradigm shift in the way we access the Internet. It has not only eased access to the Internet, but also ...
    • Opportunistic routing in wireless mesh networks 

      Darehshoorzadeh, Amir; Cerdà Alabern, Llorenç; Pla Boscà, Vicent (Springer, 2013-05)
      Capítol de llibre
      Accés obert
      Opportunistic Routing (OR) has been proposed as a way to increase the performance of wireless networks by exploiting its broadcast nature. In OR, instead of pre-selecting a single specific node to be the next-hop as a ...
    • Performance evaluation of a distributed storage service in community network clouds 

      Selimi, Mennan; Freitag, Fèlix; Cerdà Alabern, Llorenç; Veiga, Luis (Wiley, 2015-09-20)
      Article
      Accés obert
      Community networks are self-organized and decentralized communication networks built and operated by citizens, for citizens. The consolidation of today's cloud technologies offers now, for community networks, the possibility ...
    • PiCasso: enabling information-centric multi-tenancy at the edge of community mesh networks 

      Selimi, Mennan; Lertsinsrubtavee, Adisorn; Sathiaseelan, Arjuna; Cerdà Alabern, Llorenç; Navarro Moldes, Leandro (2019-12-09)
      Article
      Accés obert
      Edge computing is radically shaping the way Internet services are run by enabling computations to be available close to the users - thus mitigating the latency and performance challenges faced in today’s Internet infrastructure. ...
    • Practical service placement approach for microservices architecture 

      Selimi, Mennan; Cerdà Alabern, Llorenç; Sánchez Artigas, Marc; Freitag, Fèlix; Veiga, Luis (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      Community networks (CNs) have gained momentum in the last few years with the increasing number of spontaneously deployed WiFi hotspots and home networks. These networks, owned and managed by volunteers, offer various ...
    • Reliability analysis in a wireless ISP 

      Cerdà Alabern, Llorenç; Gemmi, Gabriele; Maccari, Leonardo (2023-03-14)
      Report de recerca
      Accés obert
      This brief report investigates different quality parameters to assess the reliability in Wireless Internet Service Providers, WISPs. In our analysis we use a Markov chain approach. We investigate the time to failure, failure ...
    • Securely-entrusted multi-topology routing for community networks 

      Neumann, Axel; López Berga, Ester; Cerdà Alabern, Llorenç; Navarro Moldes, Leandro (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Routing in open and decentralized networks relies on coopera- tion despite the participation of unknown (alien) nodes and node administrators pursuing heterogeneous trust and security goals. Living use cases for such ...
    • Selected topics in opportunistic routing in wireless networks 

      Darehshoorzadeh, Amir; Cerdà Alabern, Llorenç (LAP LAMBERT Academic Publishing GmbH & Co. KG, 2012-11-09)
      Llibre
      Accés restringit per política de l'editorial
      Oportunistic Routing (OR) has been investigated in recent years as a way to increase the performance of Wireless Mesh Networks. In OR, in contrast to traditional routing, instead of pre-selecting a single specific node to ...
    • Should next generation wireless mesh networks consider dynamic channel access? 

      Amiri Nezhad, Maryam; Bellalta Jiménez, Boris; Guerrero Zapata, Manel; Cerdà Alabern, Llorenç (2012)
      Comunicació de congrés
      Accés obert
      In today’s computer architectures, many scientific applications are considered to be memory bound. The memory wall, i.e. the large disparity between a processor’s speed and the required time to access off-chip memory, ...
    • Simulación mediante TOPSIM IV de fading lognormal para radiocanales móviles terrestres 

      Cerdà Alabern, Llorenç; Delgado Penin, José Antonio (1994)
      Text en actes de congrés
      Accés obert
    • Traffic Management of the ABR. Service Category in ATM Networks 

      Cerdà Alabern, Llorenç (Universitat Politècnica de Catalunya, 2000-01-13)
      Tesi
      Accés obert
      Data traffic has emerged as a big challenge for the standardization of traffic management mechanisms in ATM networks. In April 1996 the ATM Forum published the first version of the Available Bit Rate Service Category (ABR) ...
    • Xarxes de computadors : conceptes bàsics 

      Cerdà Alabern, Llorenç (Edicions UPC, 2007)
      Llibre
      Accés restringit a la comunitat UPC
      Aquesta obra està basada en el contingut de l'assignatura Xarxes de Computadors, de la Facultat d'Informàtica de Barcelona (FIB) de la Universidat Politècnica de Catalunya, i té per objectiu introduir els conceptes bàsics ...
    • Xarxes de computadors : conceptes bàsics 

      Cerdà Alabern, Llorenç (Edicions UPC, 2006)
      Llibre
      Accés restringit als usuaris de la UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC
      Aquesta obra està basada en el contingut de l'assignatura Xarxes de Computadors, de la Facultat d'Informàtica de Barcelona (FIB) de la Universidat Politècnica de Catalunya, i té per objectiu introduir els conceptes bàsics ...