• A-priori flow bandwidth estimates for dynamic bandwidth allocation in ISP access links 

      Aracil Rico, Javier Upna; Morató Osés, Daniel Upna (2001)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper we study a-priori bandwidth estimation algorithms for TCP flows. An RTT-based bandwidth allocator is proposed, which outperforms a broad class of peak-rate and static allocation flow switching solutions. Our ...
    • Analysis and stochastic characterization of TCP flows 

      Aracil Rico, Javier Upna; Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna (Springer, 2000)   Artículo / Artikulua  OpenAccess
      Since the most Internet services use TCP as a transport protocol there is a growing interest in the characterization of TCP flows. However, the flow characteristics depend on a large number of factors, due to the complexity ...
    • Analysis of Internet services in IP over ATM networks 

      Aracil Rico, Javier Upna; Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna (IEEE, 1999)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper presents a trace-driven analysis of IP over ATM services from a user-perceived quality of service standpoint. QoS parameters such as the sustained throughput for transactional services and other ATM layer ...
    • Approximations for end-to-end delay analysis in OBS networks with light load 

      Morató Osés, Daniel Upna; Magaña Lizarrondo, Eduardo Upna; Izal Azcárate, Mikel Upna (IEEE, 2004)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper we provide an analysis of end-to-end delay in OBS networks and a large deviations approximation. The analysis is based on an exponential approximation of the OBS router blocking time and on the assumption ...
    • Aproximación al modelado y predicción de tráfico de Internet como múltiplex de conexión de transporte 

      Morató Osés, Daniel Upna (2001)   Tesis doctoral / Doktoretza tesia  OpenAccess
      El tráfico de datos en la Internet actual presenta un nuevo reto de caracterización y modelado para el correcto dimensionamiento de los equipos y enlaces que conforman la llamada “red de redes”. En este trabajo presentamos ...
    • Arquitectura y diseño de un modelo de red OBS para simulación 

      Espina Antolín, Félix Upna; Armendáriz, Javier; Izal Azcárate, Mikel Upna; Morató Osés, Daniel Upna; Magaña Lizarrondo, Eduardo Upna (2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Optical Burst Switching (OBS) es una nueva tecnología de conmutación óptica capaz de soportar una gran demanda de ancho de banda en backbones ópticos con Wavelength Division Multiplexing (WDM). Muchos investigadores están ...
    • Blocking time analysis of OBS routers with arbitrary burst size distribution 

      Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna; Aracil Rico, Javier Upna; Magaña Lizarrondo, Eduardo Upna; Miqueleiz, J. Upna (IEEE, 2003)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The blocking time distribution for an OBS router is obtained, under the assumption of Poisson-arriving bursts with Pareto, Gaussian and Exponential burst size distributions. Analytical expressions are provided as a ...
    • Characterizing Internet load as a non-regular multiplex of TCP streams 

      Aracil Rico, Javier Upna; Morató Osés, Daniel Upna (IEEE, 2000)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A commonly accepted traffic model for a large population of Internet users consists of a multiplex of Poisson-arriving heavy-tailed streams with the same constant rate (M/G//spl infin/). We show that even though such a ...
    • Delay-throughput curves for timer-based OBS burstifiers with light load 

      Izal Azcárate, Mikel Upna; Aracil Rico, Javier Upna; Morató Osés, Daniel Upna; Magaña Lizarrondo, Eduardo Upna (IEEE, 2006)   Artículo / Artikulua  OpenAccess
      The OBS burstifier delay-throughput curves are analyzed in this paper. The burstifier incorporates a timer-based scheme with minimum burst size, i. e., bursts are subject to padding in light-load scenarios. Precisely, due ...
    • Detección de congestión en la Internet europea 

      Hernández, Ana; Magaña Lizarrondo, Eduardo Upna; Izal Azcárate, Mikel Upna; Morató Osés, Daniel Upna (IEEE, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper we present a study about the utilization of one-way delay measurements to detect and characterize network congestion in the european Internet. The experiments have been made using the ETOMIC platfom that ...
    • Detecting disruption periods on TCP servers with passive packet traffic analysis 

      Prieto Suárez, Iria Upna; Izal Azcárate, Mikel Upna; Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna (IARIA, 2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper presents a simple passive algorithm to monitor service availability. The algorithm is based on packet counting over a passive traffic trace of a population of clients accessing servers of interest. The major ...
    • Effective burst preemption in OBS network 

      Klinkowski, Miroslaw; Careglio, Davide; Morató Osés, Daniel Upna; Solé Pareta, Josep (IEEE, 2006)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Burst preemption is the most effective technique to provide Quality of Service (QoS) differentiation in Optical Burst Switching (OBS) networks. Nonetheless, in conventional OBS architectures, when preemption happens the ...
    • The ETOMIC active probing infrastructure: demo proposal 

      Csabai, István; Hága, Péter; Simon, Gábor; Stéger, József; Vattay, Gábor; Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna; Aracil Rico, Javier Upna (2006)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      ETOMIC (www.etomic.org) is a European Union sponsored effort, that aims at providing a Paneuropean traffic measurement infrastructure. This infrastructure contains 15 PC based active probing nodes equipped with ...
    • ETOMIC advanced network monitoring system for future Internet experimentation 

      Csabai, István; Fekete, Attila; Hága, Péter; Hullár, Béla; Kurucz, Gábor; Laki, Sándor; Mátray, Péter; Stéger, József; Vattay, Gábor; Espina Antolín, Félix Upna; García Jiménez, Santiago Upna; Izal Azcárate, Mikel Upna; Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna; Aracil Rico, Javier Upna; Gómez, Francisco; González, Iván; López Buedo, Sergio; Moreno, Víctor; Ramos, Javier (Springer-Verlag Berlin Heidelberg, 2010)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      ETOMIC is a network traffic measurement platform with high precision GPS-synchronized monitoring nodes. The infrastructure is publicly available to the network research community, supporting advanced experimental ...
    • The European Traffic Observatory Measurement Infraestructure (ETOMIC) 

      Morató Osés, Daniel Upna; Magaña Lizarrondo, Eduardo Upna; Izal Azcárate, Mikel Upna; Aracil Rico, Javier Upna; Naranjo Abad, Francisco José Upna; Astiz Saldaña, Francisco Javier Upna; Alonso Camaró, Ulisses Upna; Csabai, István; Hága, Péter; Simon, Gábor; Stéger, József; Vattay, Gábor (IEEE, 2004)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The European Traffic Observatory is a European Union VI Framework Program sponsored effort, within the Integrated Project EVERGROW, that aims at providing an paneuropean traffic measurement infrastructure with high-precision, ...
    • The European Traffic Observatory Measurement Infraestructure (ETOMIC): a testbed for universal active and passive measurements 

      Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna; Aracil Rico, Javier Upna; Astiz Saldaña, Francisco Javier Upna; Alonso Camaró, Ulisses Upna; Csabai, István; Hága, Péter; Simon, Gábor; Stéger, József; Vattay, Gábor (IEEE, 2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The European Traffic Observatory is a European Union VI Framework Program sponsored effort, within the Integrated Project EVERGROW, that aims at providing a paneuropean traffic measurement infrastructure with highprecisi ...
    • Evaluation of preemption probabilities in OBS networks with burst segmentation 

      Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna; Aracil Rico, Javier Upna (IEEE, 2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Preemption techniques have been recently proposed for service differentiation in Optical Burst Switching (OBS) networks. According to [1], an incoming burst with the same priority that the burst in service will preempt ...
    • Improving efficiency of IP alias resolution based on offsets between IP addresses 

      García Jiménez, Santiago Upna; Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna; Izal Azcárate, Mikel Upna (IEEE, 2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In order to get a router-level topology in Internet, IP address alias resolution techniques allow to identify IP addresses that belong to the same router. There are several proposals to make this identification, some based ...
    • Ingress traffic classification versus aggregation in video over OBS networks 

      Izal Azcárate, Mikel Upna; Espina Antolín, Félix Upna; Morató Osés, Daniel Upna; Magaña Lizarrondo, Eduardo Upna (2010)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Optical Burst Switched (OBS) networks may become a backbone technology for video-on-demand providers. This work addresses the problem of dimensioning the access link of an ingress node to the optical core network in a ...
    • Internet technologies course with combined professor and on-line contents methodology 

      Magaña Lizarrondo, Eduardo Upna; Morató Osés, Daniel Upna (IEEE, 2003)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper we present the experience and results in the teaching of a course titled “Internet Technologies”. This course, offered in Public University of Navarra (Spain), uses a special methodology that combines ...