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Ara es mostren els items 64-83 de 101

    • Non-linear optimization for multi-path source routing in OBS networks 

      Klinkowski, Miroslaw; Pioro, Michal; Careglio, Davide; Marciniak, Marian; Solé Pareta, Josep (2007-12)
      Article
      Accés obert
      Optical Burst Switching (OBS) architectures without buffering capabilities are sensitive to burst losses. A proper routing strategy may help to reduce such congestion. In this letter we present a novel approach for OBS ...

    • Nonparametric statistical methods to analyze the internet connectivity reliability 

      Papadimitriou, Dimitri; Careglio, Davide (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés obert
      Facing computational complexity when modeling network reliability by means of parametric models and corresponding statistical methods, in the present study, we apply nonparametric statistical methods, such as the Kaplan-Meier ...

    • Offline impairment-aware RWA and regenerator placement in translucent optical networks 

      García Manrubia, Bélen; Pavón Mariño, Pablo; Aparicio Pardo, Ramón; Klinkowski, Miroslaw; Careglio, Davide (2010-09-29)
      Report de recerca
      Accés obert
      In translucent optical networks the physical layer impairments degrading the optical signal are considered in the network design. In this paper we investigate the offline problem of Routing and Wavelength Assignment (RWA) ...

    • Offline routing and regenerator placement and dimensioning for translucent OBS networks 

      Pedrola Escribà, Òscar; Careglio, Davide; Klinkowski, Miroslaw; Solé Pareta, Josep (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
      Article
      Accés restringit per política de l'editorial
      The deployment of translucent optical networks is considered the most promising short term solution to decrease costs and energy consumption in optical backbone networks. In fact, translucent wavelength switched optical ...

    • On the benefits of optical gain-clamped amplification in optical burst switching networks 

      Zannin, Marcelo; Ennser, Karin; Taccheo, Stefano; Careglio, Davide; Solé Pareta, Josep; Aracil Rico, Javier (2009-12-01)
      Article
      Accés obert
      This paper investigates the performance of an all-optical method for amplification gain control to be applied in the next generation of optical networks. An erbium-doped fiber amplifier is implemented in a simple and passive ...

    • On the benefits of RINA over programmable optical networks for dynamic and smart resource management 

      Leon Gaixas, Sergio; Perelló Muntan, Jordi; Grasa, Eduard; Careglio, Davide; Spadaro, Salvatore (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we describe the basics of the Recursive InterNetwork Architecture (RINA) and its advantages as a packet transport technology over programmable optical networks. In particular, its seamless integration over ...

    • On the experimentation of the novel GCMR multicast routing in a large-scale testbed 

      Careglio, Davide; Papadimitriou, Dimitri; Agraz Bujan, Fernando; Sahhaf, Sahel; Perelló Muntan, Jordi; Tavernier, Wouter (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Comunicació de congrés
      Accés obert
      Originally defined in the 90s, multicast is nowadays (re)gaining interest given the increasing popularity of multimedia streaming/content traffic and the explosion of cloud services. In fact, multicast yields bandwidth ...

    • On the offline physical layer impairment aware RWA algorithms in transparent optical networks: state-of-the-art and beyond 

      Azodolmolky, Siamak; Pointurier, Yvan; Klinkowski, Miroslaw; Marín Tordera, Eva; Careglio, Davide; Solé Pareta, Josep; Angelou, Marianna; Tomkos, Ioannis (IEEE Press and Wiley, 2009-02-18)
      Text en actes de congrés
      Accés obert
      In transparent optical networks with no regeneration, the problem of capacity allocation to traffic demands is called "Roting and Wavelength Assignment". Much work on this topic recently has focused on the dynamic case, ...

    • On the performance of flexgrid-based optical networks 

      Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Pedrola Escribà, Òscar; Castro Casales, Alberto; Klinkowski, Miroslaw; Careglio, Davide; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The ever increasing IP traffic volume has finally brought to light the high inefficiency of current wavelength-routed rigid-grid networks in matching the client layer requirements. Such an issue results in the deployment ...

    • On the physical impairments constraint in OBS networks 

      Pedrola Escribà, Òscar; Careglio, Davide; Klinkowski, Miroslaw; Solé Pareta, Josep (2010)
      Text en actes de congrés
      Accés obert
      The introduction of sub-wavelength switching is one of the main objectives of the future transparent optical mesh networks. One strong candidate is Optical Burst Switching (OBS) which improves the resource utilisation by ...

    • OSPF-TE extensions for green routing in optical networks 

      Wang, Jiayuan; Ricciardi, Sergio; Manolova Vasileva, Anna; Ruepp, Sarah; Careglio, Davide; Dittmann, L. (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper proposes extensions to the OSPF-TE protocol to enable green routing in GMPLS-controlled optical networks. Simulation results show a remarkable reduction in CO 2 emissions by preferring network elements ...

    • PCE algorithm for traffic grooming and QoS in multi-layer/multi-domain IP over WDM networks 

      Sócrates Dantas, Joana; Careglio, Davide; Melo Silveira, Regina; Vicente Ruggiero, Wilson; Solé Pareta, Josep (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Differentiated services provision according to clients or applications is an added feature that network operators ambition to fully provide. One of the possible approaches is to map DiffServ into MPLS based network. However ...

    • Performance analysis of multicast routing algorithms 

      Papadimitriou, Dimitri; Careglio, Davide; Demeester, Piet M.A. (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés obert
      This paper provides a theoretical performance analysis of different classes of multicast routing algorithms, namely the Shortest Path Tree, the Steiner Tree, compact routing and greedy routing. Our motivation is to determine ...

    • Performance issues in Optical Burst/Packet Switching 

      Klinkowski, Miroslaw; Careglio, Davide; Aracil Rico, Javier; Azodolmolky, Siamak; García Haro, Juan; Gunreben, Sebastian; Hu, Guoqiang; Izal, Mikel; Kimsas, Andreas; Veiga Gontán, Javier; Tzanakaki, Anna; Tomkos, Ioannis; Spadaro, Salvatore; Scharf, Joachim; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Morató, Daniel; Magaña, Eduardo; Köhn, Martin (Springer, 2009-04-01)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This chapter summarises the activities on optical packet switching (OPS) and optical burst switching (OBS) carried out by the COST 291 partners in the last 4 years. It consists of an introduction, five sections with ...

    • Performance overview of the offset time emulated OBS network architecture 

      Klinkowski, Miroslaw; Careglio, Davide; Solé Pareta, Josep; Marciniak, Marian (2009-07)
      Article
      Accés obert
      Optical burst switching (OBS) control architecture considers two different models for the management of the offset time in the network. The conventional OBS (C-OBS) introduces the offset time in soft-way by delaying the ...

    • Planning and operational energy optimization solutions for smart buildings 

      Sembroiz Ausejo, David; Careglio, Davide; Ricciardi, Sergio; Fiore, Ugo (2019-02)
      Article
      Accés obert
      The incremented popularity of Internet of Things (IoT), thanks to improvements both in hardware and software of sensors over the last years, enables the possibility to monitor and gather any kind of data. Additionally, the ...

    • Preemption window for burst differentiation in OBS 

      Klinkowski, Miroslaw; Careglio, Davide; Morató, Daniel; Solé Pareta, Josep (BERTScope, 2008-02-28)
      Text en actes de congrés
      Accés obert
      This paper presents a novel control architecture for optical burst switching networks to efficiently apply burst preemption without the resources overbooking, which is specific to conventional OBS. Simulation results prove ...

    • Preemption window mechanism for efficient QoS support in E-OBS network architecture 

      Careglio, Davide; Klinkowski, Miroslaw; Solé Pareta, Josep (ICST, 2008-09-30)
      Text en actes de congrés
      Accés obert
      This paper focuses on the problem of quality of service (QoS) provisioning in optical burst switching (OBS) networks. OBS is a promising photonic network technology aiming at efficient transport of IP traffic by means of ...

    • Proveïment de QoS en xarxes de paquets òptiques per a entorns d'àrea metropolitana i de gran abast 

      Careglio, Davide (Universitat Politècnica de Catalunya, 2005-02-15)
      Tesi
      Accés obert
      El gran crecimiento y expansión de Internet en los últimos años, con el consecuente incremento de usuarios y tráfico, ha hecho que aumente la necesidad de ancho de banda en las redes de telecomunicación actuales. El desafío ...

    • Reactive and proactive routing in labelled optical burst switching networks 

      Klinkowski, Miroslaw; Careglio, Davide; Solé Pareta, Josep (2009-04)
      Article
      Accés obert
      Optical burst switching architectures without buffering capabilities are sensitive to burst congestion. The existence of a few highly congested links may seriously aggravate the network throughput. Proper network routing ...