Now showing items 1-20 of 44

    • A GMPLS/OBS network architecture enabling QoS-aware end-to-end burst transport 

      Pedroso, Pedro; Perelló Muntan, Jordi; Spadaro, Salvatore; Careglio, Davide; Solé Pareta, Josep; Klinkowski, Miroslaw (2010-07-01)
      External research report
      Open Access
      This paper introduces a Generalized Multi-Protocol Label Switching (GMPLS)-enabled Optical Burst Switched (OBS) network architecture featuring end-to-end QoS-aware burst transport services. This is achieved by setting up ...
    • A novel offline physical layer impairments aware RWA algorithm with dedicated path protection consideration 

      Azodolmolky, Siamak; Klinkowski, Miroslaw; Pointurier, Yvan; Angelou, Marianna; Careglio, Davide; Solé Pareta, Josep; Tomkos, Ioannis (2010-10-15)
      Article
      Open Access
      Physical layer impairments accumulate as light propagates through a lightpath in the transparent optical networks. Therefore, it is possible to provision a lightpath, while its quality of transmission (QoT) does not meet ...
    • A performance overview of quality of service mechanisms in optical burst switching networks 

      Klinkowski, Miroslaw; Careglio, Davide; Solé Pareta, Josep; Marciniak, Marian (Springer, 2009-04-01)
      Part of book or chapter of book
      Restricted access - publisher's policy
      This Chapter addresses the problem of quality of service (QoS) provisioning in optical burst switching (OBS) networks. OBS is a photonic network technology aiming at efficient transport of IP traffic. The lack of optical ...
    • A performance survey on deflection routing techniques for OBS networks 

      Pedrola Escribà, Òscar; Rumley, Sébastien; Careglio, Davide; Klinkowski, Miroslaw; Pedroso, Pedro; Solé Pareta, Josep; Gaumier, Christian (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
      Conference report
      Open Access
      In this paper, we present a survey comparing different deflection routing based techniques applied to optical burst switching (OBS) networks. For such study we consider the E-OBS architecture proposed in [1] which is an ...
    • 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 simulation study of combined routing and contention resolution algorithms in connection-oriented OPS network scenario 

      Klinkowski, Miroslaw; Careglio, Davide; Masip Bruin, Xavier; Spadaro, Salvatore; Sánchez López, Sergio; Solé Pareta, Josep (IEEE Press and Wiley, 2004-10-12)
      Conference report
      Open Access
      Connection-oriented optical packet-switched network integrates MPLS and OPS layers to exploit the best of electronic and optical technologies. In particular, routing components use enhanced routing algorithms to compute ...
    • 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) ...
    • 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 ...
    • After failure repair optimization in dynamic flexgrid optical networks 

      Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Castro Casales, Alberto; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo; Pioro, Michal (The Optical Society (OSA), 2014)
      Conference report
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      We introduce the problem of reoptimizing the network after a link failure has been repaired as an effective way for reducing capacity usage and improving network performance. Numerical results show gains higher than 42%.
    • An analysis of Regenerator Placement strategies for a Translucent OBS network architecture 

      Pedrola Escribà, Òscar; Careglio, Davide; Klinkowski, Miroslaw; Solé Pareta, Josep (2010-09-28)
      External research report
      Open Access
      Most research works in optical burst switching (OBS) networks do not take into account the impact of physical layer impairments (PLIs) either by considering fully transparent (i.e., using optical 3R regeneration) or opaque ...
    • An interoperable GMPLS/OBS Control Plane: RSVP and OSPF extensions proposal 

      Pedroso, Pedro; Careglio, Davide; Casellas, Ramon; Klinkowski, Miroslaw; Solé Pareta, Josep (E. Leitgeb, W. Kogler, Z. Ghassemlooy, 2008-07-31)
      Conference report
      Open Access
      The GMPLS/OBS Control Plane is a bold research topic. Optical Burst Switching (OBS) networks need to be capable to be rapidly reconfigured with the aim of achieving an efficient use of bandwidth, low latency and high ...
    • AnyTraffic routing algorithm for label-based forwarding 

      Pedroso, Pedro; Pedrola Escribà, Òscar; Papadimitriou, Dimitri; Klinkowski, Miroslaw; Careglio, Davide (IEEE Press and Wiley, 2009-11-30)
      Conference report
      Open Access
      The high capacity provided by packet-switched networks is supporting the proliferation of bandwidth intensive multimedia applications which require multicasting capability. As a consequence on today’s networks, unicast ...
    • AnyTraffic routing algorithm for label-based forwarding 

      Pedroso, Pedro; Pedrola Escribà, Òscar; Papadimitriou, Dimitri; Careglio, Davide; Klinkowski, Miroslaw (2009-06-11)
      External research report
      Open Access
      The high capacity provided by packet-switched networks is supporting the proliferation of bandwidth intensive multimedia applications which require multicasting capability. As a consequence a mixed traffic scenario where ...
    • Channel allocation in dense wavelength division multiplexing radio-over-fiber networks 

      Klinkowski, Miroslaw; Jaworski, Marek; Careglio, Davide (2010)
      Conference report
      Open Access
      In this paper we address the problem of the Radio-over-Fiber (RoF) network design. In particular, we focus on a DWDM RoF network for which we formulate a maximal service RoF channel allocation (MSCA) problem. Although MSCA ...
    • Column generation algorithm for RSA problems in flexgrid optical networks 

      Ruiz Ramírez, Marc; Pioro, Michal; Zotkiewicz, Mateusz; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo (2013-10)
      Article
      Restricted access - publisher's policy
      Finding optimal routes and spectrum allocation in flexgrid optical networks, known as the RSA problem, is an important design problem in transport communication networks. The problem is TeX -hard, and its intractability ...
    • Experimental study on the impact of regenerator placement strategies when dynamically provisioning in translucent GMPLS WSON networks 

      Martínez, Ricardo; Casellas, Ramon; Muñoz, Raul; García Manrubia, Bélen; Pavón Mariño, Pablo; Klinkowski, Miroslaw; Careglio, Davide (Optical Society of America, 2011)
      Conference report
      Open Access
      The impact of the regenerator placement strategies when dynamically provisioning connections in translucent WSON is studied. The evaluation is experimentally conducted in the ADRENALINE testbed in terms of the connection ...
    • Impact of aggregation level on the performance of dynamic lightpath adaptation under time-varying traffic 

      Asensio Carmona, Adrian; Klinkowski, Miroslaw; Ruiz Ramírez, Marc; Lopez, Victor Bohorquez; Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In this article we focus on lightpath adaptation under time-varying traffic in a dynamic elastic optical network (EON) implementing flexgrid optical technology. In the considered scenario, a number of IP/MPLS metro area ...
    • Joint content placement and lightpath routing and spectrum assignment in CDNs over elastic optical network scenarios 

      Perelló Muntan, Jordi; Walkowiak, Krzysztof; Klinkowski, Miroslaw; Spadaro, Salvatore; Careglio, Davide (2016-03-01)
      Article
      Open Access
      In this work, we address the problem of jointly deciding the placement of the contents delivered by a Content Distribution Network (CDN) among the available data centers, together with the allocation of the lightpaths ...
    • Metaheuristic hybridizations for the regenerator placement and dimensioning problem in sub-wavelength switching optical networks 

      Pedrola Escribà, Òscar; Careglio, Davide; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo; Bergman, K.; Solé Pareta, Josep (Elsevier, 2013-02-01)
      Article
      Restricted access - publisher's policy
      Physical layer impairments severely limit the reach and capacity of optical systems, thereby hampering the deployment of transparent optical networks (i.e., no electrical signal regenerators are required). Besides, the ...
    • Modeling the routing and spectrum allocation problem for flexgrid optical networks 

      Velasco Esteban, Luis Domingo; Klinkowski, Miroslaw; Ruiz Ramírez, Marc; Comellas Colomé, Jaume (2012-12)
      Article
      Restricted access - publisher's policy
      Flexgrid optical networks are attracting huge interest due to their higher spectrum efficiency and flexibility in comparison with traditional wavelength switched optical networks based on the wavelength division multiplexing ...