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  • Lcast: Software-defined inter-domain multicast

     Coras, Florin-tudorel; Domingo Pascual, Jordi; Maino, Fabio; Farinacci, Dino; Cabellos Aparicio, Alberto
    Computer networks
    Date of publication: 2014-02-11
    Journal article

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    Traditionally, efficient inter-domain data delivery may be implemented either as a network or as an application layer multicast service. However, while the former has seen little uptake due to prohibitive deployment costs the latter is widely used today, but often without a minimum guaranteed performance. In this paper we present Lcast, a network-layer single-source multicast framework designed to merge the robustness and efficiency of IP multicast with the configurability and low deployment cost of application-layer overlays. The architecture involves no end-host changes and only requires the upgrading of a small set of routers to support the Locator/ID Separation Protocol (LISP), an incrementally deployable enhancement to the current global routing infrastructure. Content distribution over the Internet's core is done by means of a router overlay while within domains, end-hosts interface with Lcast using conventional multicast protocols. The overlay's scalability and topological configurability is sustained by logically centralizing group management. We illustrate the versatility of our solution by designing and assessing the scalability and performance of three management strategies for low latency content distribution. Our analysis is based on large scale simulations supported by realistic user behavior and Internet-like network topologies. The results show Lcast's low management overhead and ability to optimize delivery to meet various operational constraints. Notably, we find that it can deliver traffic with latencies close to unicast ones, independent of overlay size. (C) 2013 Elsevier B.V. All rights reserved.

  • Modeling and exploiting the relation between packet losses and hidden traffic

     Portoles Comeras, Marc; Cabellos Aparicio, Alberto; Serrano, Plabo; Mangues Bafalluy, Josep; Núñez Martínez, José; Solé Simó, Marc; Banchs, Albert; Domingo Pascual, Jordi
    IEEE Wireless Communications Letters
    Date of publication: 2013-08
    Journal article

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    Nowadays, it is common to find multiple WLAN deployments coexisting in shared spaces. The resulting interference between transmissions represents an important source of performance degradation, specially those originating from hidden traffic. This note explores the relation between hidden traffic and packet losses, using renewal theory to show that losses constitute biased samples of hidden traffic. Building on the developed analytical model, the paper derives the optimal frame length that maximizes throughput in the presence of hidden traffic. The results are validated using an 802.11 WLAN in-lab setting.

  • fHA: a flexible and distributed home agent architecture for mobile-IP based networks

     Cabellos Aparicio, Alberto; Cioran, Dorin-Mircea; Barlet Ros, Pere; Domingo Pascual, Jordi; Dobrota, Virgil
    Information sciences
    Date of publication: 2012-11-30
    Journal article

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  • GESTION DE LA MOVILIDAD BASADA EN LA SEPARACION DE IDENTIFICADORES

     Cabellos Aparicio, Alberto; Coras, Florin-tudorel; Domingo Pascual, Jordi
    Participation in a competitive project

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  • GPON and EP2P: a techno-economic study

     Ricciardi, Sergio; Santos Boada, German; Careglio, Davide; Domingo Pascual, Jordi
    European Conference on Networks and Optical Communications
    Presentation's date: 2012-06-20
    Presentation of work at congresses

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    New services like Video on demand/Internet Protocol Television, Voice over IP and high speed Internet access demand very high bandwidth to provide Triple Play services to the customers. The ADSL/ADLS2+ and the VDSL/VDSL2 copper- wire technologies deteriorate quickly with the distance and will be soon obsolete for supporting the ultra-high bandwidth requirements of the next future. One suitable long term solution for such a high bandwidth demand is employing optical fibers to customers premises (FTTH). In particular, two optical distribution network architectu res, GPON (gigabit passive optical network) and EP2P (E thernet point-to-point), are competing for the network access segment. This paper surveys the two technologies and evalua tes them from a quantitative techno-economic point of view, tr ying to identify which market scenarios are best served by EP2P and which are best served by GPON architectures for supporting the requirement of Triple Play applications .

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    An empirical study of effective capacity throughputs in 802.11 wireless networks  Open access

     Davy, Alan; Meskill, Brian; Domingo Pascual, Jordi
    IEEE Global Communications Conference
    Presentation's date: 2012-12
    Presentation of work at congresses

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    Current literature defines the effective capacity of a wireless link as the maximum throughput that can be supported while meeting specific Quality of Service targets on packet delay. This metric can be harnessed for a wide variety of QoS control routines within wireless networks such as traffic optimisation and delay sensitive admission control and routing. However to date, no empirical evaluation of the effective capacity of 802.11 wireless links has been carried out. We present an empirical study of the effective capacity throughput of 802.11 wireless links under a number of network scenarios. We evaluate an analytical effective capacity model and compare the result with an empirical evaluation. We find that with an accurate measurement of the channel service delay, the effective capacity model can approximate the empirical measurement quite well. We also evaluate the relationship between the effective bandwidth of multimedia traffic and demonstrate that when the effective bandwidth exceeds the effective capacity threshold of a wireless link, the probability of QoS violations increases. We conclude that the effective capacity measurement is usable within an operational setting, and can lead to optimized utilization of bandwidth in a wide range of delay sensitive control operations.

    Current literature defines the effective capacity of a wireless link as the maximum throughput that can be supported while meeting specific Quality of Service targets on packet delay. This metric can be harnessed for a wide variety of QoS control routines within wireless networks such as traffic optimisation and delay sensitive admission control and routing. However to date, no empirical evaluation of the effective capacity of 802.11 wireless links has been carried out. We present an empirical study of the effective capacity throughput of 802.11 wireless links under a number of network scenarios. We evaluate an analytical effective capacity model and compare the result with an empirical evaluation. We find that with an accurate measurement of the channel service delay, the effective capacity model can approximate the empirical measurement quite well. We also evaluate the relationship between the effective bandwidth of multimedia traffic and demonstrate that when the effective bandwidth exceeds the effective capacity threshold of a wireless link, the probability of QoS violations increases. We conclude that the effective capacity measurement is usable within an operational setting, and can lead to optimized utilization of bandwidth in a wide range of delay sensitive control operations.

    Postprint (author’s final draft)

  • Novática: revista de la Asociación de Técnicos de Informática

     Domingo Pascual, Jordi
    Collaboration in journals

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  • Implementing a BGP-free ISP core with LISP

     Coras, Florin-tudorel; Saucez, Damien; Lorand, Jakab; Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    IEEE Global Communications Conference
    Presentation's date: 2012-12
    Presentation of work at congresses

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    The sustained growth of the global routing table is exerting an economical strain on ISPs by requiring untimely router upgrades. Notably, it has been speculated that the growth rate of router FIBs is surpassing that of its supporting technology and that the deployment of IPv6 is only to make matters worse. In this paper, we propose LISP-MPS, an architecture based on LISP, that isolates the intra-domain routing of an Autonomous System (AS) from its inter-domain routing. The resulting separation implies the decrease of backbone routing table sizes and enables an AS to control the forwarding of traffic inside its network. For a seamless, cost effective, and incremental deployment, LISP-MPS leverages iBGP to implement the LISP mapping system functionality with minimal modification to a small subset of deployed equipment. Finally, an analysis of realistic topologies shows that, despite changing how packets transit a network, the architecture does not lose resilience to failures. Moreover, we show that it can be a viable alternative to BGP/MPLS deployments due to its low implementation cost.

    The sustained growth of the global routing table is exerting an economical strain on ISPs by requiring untimely router upgrades. Notably, it has been speculated that the growth rate of router FIBs is surpassing that of its supporting technology and that the deployment of IPv6 is only to make matters worse. In this paper, we propose LISP-MPS, an architecture based on LISP, that isolates the intra-domain routing of an Autonomous System (AS) from its inter-domain routing. The resulting separation implies the decrease of backbone routing table sizes and enables an AS to control the forwarding of traffic inside its network. For a seamless, cost effective, and incremental deployment, LISP-MPS leverages iBGP to implement the LISP mapping system functionality with minimal modification to a small subset of deployed equipment. Finally, an analysis of realistic topologies shows that, despite changing how packets transit a network, the architecture does not lose resilience to failures. Moreover, we show that it can be a viable alternative to BGP/MPLS deployments due to its low implementation cost.

  • An analytical model for the LISP cache size

     Coras, Florin-tudorel; Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    International Conferences on Networking
    Presentation of work at congresses

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  • Use of Locator/Identifier Separation to Improve the Future Internet Routing System  Open access

     Jakab, Lorand
    Defense's date: 2011-07-04
    Department of Computer Architecture, Universitat Politècnica de Catalunya
    Theses

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    The Internet evolved from its early days of being a small research network to become a critical infrastructure many organizations and individuals rely on. One dimension of this evolution is the continuous growth of the number of participants in the network, far beyond what the initial designers had in mind. While it does work today, it is widely believed that the current design of the global routing system cannot scale to accommodate future challenges. In 2006 an Internet Architecture Board (IAB) workshop was held to develop a shared understanding of the Internet routing system scalability issues faced by the large backbone operators. The participants documented in RFC 4984 their belief that "routing scalability is the most important problem facing the Internet today and must be solved." A potential solution to the routing scalability problem is ending the semantic overloading of Internet addresses, by separating node location from identity. Several proposals exist to apply this idea to current Internet addressing, among which the Locator/Identifier Separation Protocol (LISP) is the only one already being shipped in production routers. Separating locators from identifiers results in another level of indirection, and introduces a new problem: how to determine location, when the identity is known. The first part of our work analyzes existing proposals for systems that map identifiers to locators and proposes an alternative system, within the LISP ecosystem. We created a large-scale Internet topology simulator and used it to compare the performance of three mapping systems: LISP-DHT, LISP+ALT and the proposed LISP-TREE. We analyzed and contrasted their architectural properties as well. The monitoring projects that supplied Internet routing table growth data over a large timespan inspired us to create LISPmon, a monitoring platform aimed at collecting, storing and presenting data gathered from the LISP pilot network, early in the deployment of the LISP protocol. The project web site and collected data is publicly available and will assist researchers in studying the evolution of the LISP mapping system. We also document how the newly introduced LISP network elements fit into the current Internet, advantages and disadvantages of different deployment options, and how the proposed transition mechanism scenarios could affect the evolution of the global routing system. This work is currently available as an active Internet Engineering Task Force (IETF) Internet Draft. The second part looks at the problem of efficient one-to-many communications, assuming a routing system that implements the above mentioned locator/identifier split paradigm. We propose a network layer protocol for efficient live streaming. It is incrementally deployable, with changes required only in the same border routers that should be upgraded to support locator/identifier separation. Our proof-of-concept Linux kernel implementation shows the feasibility of the protocol, and our comparison to popular peer-to-peer live streaming systems indicates important savings in inter-domain traffic. We believe LISP has considerable potential of getting adopted, and an important aspect of this work is how it might contribute towards a better mapping system design, by showing the weaknesses of current favorites and proposing alternatives. The presented results are an important step forward in addressing the routing scalability problem described in RFC 4984, and improving the delivery of live streaming video over the Internet.

  • CoreCast: how core/edge separation can help improving inter-domain live streaming

     Jakab, Lorand; Cabellos Aparicio, Alberto; Silverston, Thomas; Solé Simó, Marc; Coras, Florin-tudorel; Domingo Pascual, Jordi
    Computer networks
    Date of publication: 2010-07-08
    Journal article

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  • 159386-TEMPUS-1-2009-1DE-TEMPUS-JPCR

     Castell Ariño, Nuria; Delgado Mercé, Jaime; Domingo Pascual, Jordi; Velasco Esteban, Luis
    Participation in a competitive project

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  • REDES CONVERGENTES Y OMNIPRESENTES

     Careglio, Davide; Domingo Pascual, Jordi; Jakab, Lorand; Barlet Ros, Pere; Cruellas Ibarz, Juan Carlos; Cabellos Aparicio, Alberto; Klinkowski, Miroslaw; Sanjuas Cuxart, Josep; Pedrola Escriba, Oscar; Carela Español, Valentin; Ricciardi, Sergio; Lopez Bresco, Albert; Canto Rodrigo, Pablo Del; Segarra Campos, Olga; Cruellas Ibarz, Marta; Paredes Oliva, Ignasi; Coras, Florin-tudorel; Pedroso Mendonça, Pedro; Azodolmolky, Siamak; Sole Pareta, Josep
    Participation in a competitive project

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  • An experimental evaluation of packet-level measurements of hidden traffic load

     Núñez Martínez, José; Portoles Comeras, Marc; Cabellos Aparicio, Alberto; López Rovira, Daniel; Mangues Bafalluy, Josep; Domingo Pascual, Jordi
    International Conference on Wired/Wireless Internet Communications
    Presentation's date: 2010-05-06
    Presentation of work at congresses

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  • Practical design constraints for measuring utilization in hybrid paths using delay measurements

     Núñez Martínez, José; Portoles Comeras, Marc; Cabellos Aparicio, Alberto; Mangues Bafalluy, Josep; Domingo Pascual, Jordi
    International workshop on Wireless Network Measurements
    Presentation's date: 2010-05-31
    Presentation of work at congresses

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  • Aprendizaje cooperativo distribuido en base a Web 2.0

     Santos Boada, German; Domingo Pascual, Jordi; Sole Pareta, Josep; Fumero, Antonio; Quemada Vives, Juan; Salvachúa, Joaquín; Casares Giner, Vicente; Vidal Català, José Ramón
    Congrés Internacional de Docència Universitària i Innovació
    Presentation's date: 2010-06-30
    Presentation of work at congresses

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  • Beyond Bandwidth Networking (BEYOND)

     Jakab, Lorand; Domingo Pascual, Jordi; Cabellos Aparicio, Alberto
    Participation in a competitive project

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  • Herramientas para la monitorización y el análisis de tráfico en la internet del futuro

     Domingo Pascual, Jordi; Cabellos Aparicio, Alberto; Barlet Ros, Pere
    Participation in a competitive project

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  • Sustained future networks (SUSTAIN-NET)

     Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    Participation in a competitive project

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    Analysis of the threshold between GPON and EP2P  Open access

     Santos Boada, German; García-Torres, José; Domingo Pascual, Jordi
    Date: 2009-10-26
    Report

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    New services like Video on demand, Television (IPTV), high speed Internet access and Voice over IP on top the same link are called Triple Play services. These services demand very high bandwidth to customers. ADSL and ADLS2+ aren’t enough for supporting the new bandwidth requirement. One suitable solution for high bandwidth demand with a long reach is to use optical cable to customers (FTTX). Nowadays there are two technologies GPON (Gigabit passive optical network) and EP2P (Ethernet point-to-point) fighting for to be implemented in network access. This paper makes an evaluation between both solutions and it tries to answer the next question: What is the best solution for supporting requirement of Triple Play applications?

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    A passive available bandwidth estimation methodology  Open access

     Cabellos Aparicio, Alberto; Thompson, John; García, Francisco J.; Domingo Pascual, Jordi
    Date: 2009-11-30
    Report

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    The Available Bandwidth (AB) of an end-to-end path is its remaining capacity and it is an important metric for several applications such as overlay routing and P2P networking. That is why many AB estimation tools have been published recently. Most of these tools use the Probe Rate Model, which requires sending packet trains at a rate matching the AB. Its main issue is that it congests the path under measurement. We present a different approach: a novel passive methodology to estimate the AB that does not introduce probe traffic. Our methodology, intended to be applied between two separate nodes, estimates the path’s AB by analyzing specific parameters of the traffic exchanged. The main challenge is that we cannot rely on any given rate of this traffic. Therefore we rely on a different model, the Utilization Model. In this paper we present our passive methodology and a tool (PKBest) based on it. We evaluate its applicability and accuracy using public NLANR data traces. Our results -more than 300Gb- show that our tool is more accurate than pathChirp, a state-of-the-art active PRM-based tool. At the best of the authors’ knowledge this is the first passive AB estimation methodology.

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    Validation of a LISP simulator  Open access

     Cabellos Aparicio, Alberto; Domingo Pascual, Jordi; Saucez, Damien; Bonaventure, Olivier
    Date: 2009-06-19
    Report

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    We have developed a LISP simulator (CoreSim). CoreSim is an Internet-scale LISP deployment simulator. It is able to replay a packet trace and simulate the behavior of a LISP Ingress Tunnel Router (ITR) and the associated Mapping Resolver, on top of a topology based on measurements performed by the iPlane infrastructure. It reports mapping lookup latency, the load imposed on each node of the MS and cache performance statistics. The simulator implements LISP-ALT and LISP-DHT. In this technical report we validate our LISP-DHT implementation, present an estimator for the latencies not reported by iPlane and discuss the architecture of CoreSim.

  • Supporting mobility in LISP

     Jakab, Lorand; Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    Date: 2009-10-05
    Report

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  • SISTEMES DE COMUNICACIO DE BANDA AMPLA (CBA)

     Perello Muntan, Jordi; Sole Pareta, Josep; Careglio, Davide; Cruellas Ibarz, Juan Carlos; Santos Boada, German; Barlet Ros, Pere; Cabellos Aparicio, Alberto; Jakab, Lorand; Pedroso, Pedro; Klinkowski, Miroslaw; López Brescó, Albert; Mikians, Jakub; Sanjuas Cuxart, Josep; Paredes Oliva, Ignasi; Carela Español, Valentin; Llatser Marti, Ignacio; Coras, Florin-tudorel; Pedrola Escriba, Oscar; Sócrates Dantas, Joana; Ricciardi, Sergio; Domingo Pascual, Jordi
    Participation in a competitive project

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  • Towards an efficient Service Level Agreement assessment

     Serral Gracia, Rene; Labit, Yann; Domingo Pascual, Jordi; Owezarski, Philippe
    IEEE Conference on Computer Communications
    Presentation's date: 2009-04
    Presentation of work at congresses

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  • Towards End-to-End SLA Assessment.

     Serral Gracia, Rene
    Defense's date: 2009-01-16
    Department of Computer Architecture, Universitat Politècnica de Catalunya
    Theses

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  • fP2P-HN: A P2P-based route optimization architecture for mobile IP-based community networks

     Cuevas, Ruben; Cabellos Aparicio, Alberto; Cuevas, Angel; Domingo Pascual, Jordi; Azcorra, A
    Computer networks
    Date of publication: 2009-03
    Journal article

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    RI-CUBE: dotando al PCE de información abstracta de ingeniería de tráfico interdominio  Open access

     Domínguez Dorado, Manuel; González Sánchez, José Luis; Domingo Pascual, Jordi; Carmona Murillo, Juan
    Iberoamerican Conference on Telematics
    Presentation's date: 2009-05
    Presentation of work at congresses

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    El cómputo de rutas en Internet se ha vuelto una tarea compleja y costosa. La arquitectura PCE (Path Computation Element) proporciona la funcionalidad necesaria para el cómputo de rutas interdominio en redes MPLS (Multiprotocol Label Switching) y GMPLS (Generalized Multiprotocol Label Switching). En este escenario, el cálculo de rutas interdominio se lleva a cabo mediante la cooperación entre PCEs. El PCE que requiera ayuda, utiliza un mecanismo de selección de PCEs colaboradores que podría tener en consideración el estado de la red y sus recursos. Este mecanismo es especialmente importante debido al impacto que tiene en el tiempo total necesario para computar una ruta interdominio completa. En este trabajo, aportamos un detallado estudio de la información de ingeniería de tráfico manejada por los IGPs (Interior Gateway Protocols) más importantes y también un mecanismo para intercambiar esta información en entornos interdominio de forma que no se viole la privacidad de sobre la topología de la dominios afectados. Con esta información en su poder, un elemento PCE puede seleccionar un PCE exterior para colaborar, de forma efectiva y más precisa, minimizando el tiempo total necesario para calcular la ruta interdominio.

  • fP2P-HN: a P2P-based route optimization solution for mobile IP and NEMO clients

     Cabellos Aparicio, Alberto; Cuevas, Rubén; Domingo Pascual, Jordi; Cuevas, Ángel; Guerrero, Carmen
    IEEE International Conference on Communications
    Presentation's date: 2009-06-10
    Presentation of work at congresses

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  • Impact of transient CSMA/CA access delays on active bandwidth measurements

     Portoles Comeras, Marc; Cabellos Aparicio, Alberto; Banchs, Albert; Mangues Bafalluy, Josep; Domingo Pascual, Jordi
    Internet Measurement Conference
    Presentation's date: 2009-05-15
    Presentation of work at congresses

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    Improving the Performance of Route Control Middleboxes in a Competitive Environment  Open access

     Yannuzzi, Marcelo; Masip Bruin, Javier; Marín Tordera, Eva; Domingo Pascual, Jordi; Fonte, Alexandre; Monteiro, Edmundo
    IEEE network
    Date of publication: 2008-09
    Journal article

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    Multihomed subscribers are increasingly adopting intelligent route control solutions to optimize the cost and end-to-end performance of the traffic routed among the different links connecting their networks to the Internet. Until recently, IRC practices were not considered adverse, but new studies show that in a competitive environment, they can lead to persistent traffic oscillations, causing significant performance degradation rather than improvements. To cope with this, randomized IRC techniques were proposed. However, the proliferation of IRC products raises concerns, given that randomization becomes less effective as the number of interfering IRC systems increases. In this article, we present a more scalable route control strategy that can better support the foreseeable spread of IRC solutions. We show that by blending randomization with adaptive filtering techniques, it is possible to drastically reduce the interference between competing route controllers, and this can be achieved without penalizing the end-to-end traffic performance. In addition to the potential improvements in terms of scalability and performance, the route control strategy outlined here has various practical advantages. For instance, it does not require any kind of protocol or coordination between the competing IRC middleboxes, and it can be adopted readily today because the only requirement is a software upgrade of the available route controllers.

  • QoS Measurements in IP-based Networks

     Serral Gracia, Rene; Domingo Pascual, Jordi; Andrzej, Beben; Owezarski, Philippe
    Date of publication: 2008-01
    Book chapter

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  • Infrastructures for community networks

     Plagemann, Thomas; Canonico, Roberto; Domingo Pascual, Jordi; Guerrero, Carmen; Andreas, Mauthe
    Date of publication: 2008-02
    Book chapter

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  • Parameter evaluation for distributed SLA assessment

     Serral Gracia, Rene; Labit, Yann; Domingo Pascual, Jordi; Owezarski, Philippe
    Date: 2008-08
    Report

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  • An Overview of Security Threats in Peer-to-Peer Content Delivery Networks

     Mazzariello, Claudio; Jakab, Lorand; Domingo Pascual, Jordi; Giorgio, Ventre
    Date: 2008-09
    Report

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  • Measurement-Based Analysis of the Performance of several Wireless Technologies

     Rares, Cosma; Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    Date: 2008-06
    Report

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    Measurement-based characterization of the load of a Mobile IPv6's Home Agent  Open access

     Cristian, Mihai; Cabellos Aparicio, Alberto; Cosma, Rares; Domingo Pascual, Jordi; Pinheiro, Pedro Vale; Boavida, Fernando
    Date: 2008-10
    Report

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    Wireless technologies are rapidly evolving and the users are demanding the possibility of changing its point of attachment to the Internet (i.e Access Router) without breaking the IP communications. This can be achieved by using Mobile IPv6. However mobile clients must forwards its data packets addressed towards its home network through a special entity, the Home Agent (HA). This HA is a key point when considering the performance of Mobile IPv6-based networks.

  • Analysis of Bandwidth Measurement Methodologies over WLAN systems

     Portoles-Comeras, Marc; Cabellos Aparicio, Alberto; Mangues-Bafalluy, Josep; Domingo Pascual, Jordi; Domingo-Pascual, Jordi
    Date: 2008-10-01
    Report

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  • Data Traffic Monitoring and Analysis (TMA)

     Sole Pareta, Josep; Barlet Ros, Pere; Cabellos Aparicio, Alberto; Sanjuas Cuxart, Josep; Paredes Oliva, Ignasi; Carela Español, Valentin; Mikians, Jakub; Domingo Pascual, Jordi
    Participation in a competitive project

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    Distributed sampling for on-line SLA assessment  Open access

     Serral Gracia, Rene; Barlet Ros, Pere; Domingo Pascual, Jordi
    IEEE Workshop on Local and Metropolitan Area Networks
    Presentation's date: 2008-09-03
    Presentation of work at congresses

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    New business infrastructures over the Internet pose a new set of traffic constraints. In particular, multimedia and interactive contents require guarantees of bandwidth and delivery time. The broad deployment and real-time nature of this class of applications require the provisioning of specific resources in the network to guarantee a certain level of Quality of Service (QoS). QoS techniques need ways of obtaining feedback about the status of the QoS enabled paths, for example, for checking the fulfilment of Service Level Agreements (SLA). A possible technique for obtaining such feedback is by passively monitoring the network traffic. The issue with traffic monitoring is the additional bandwidth needed by the control traffic generated by the different collection points in order to synchronise its acquired QoS metrics. Moreover, passive monitoring at line speed is an expensive process both in terms of resource consumption and price. However, some of these requirements can be significantly reduced by using traffic sampling. This paper presents a novel methodology for intra-domain on-line distributed QoS monitoring, which makes an efficient use of the network resources by employing distributed sampling mechanisms. The proposal is validated by performing real tests on an European-wide testbed. Our results show that the sampling technique can significantly reduce the traffic overhead, while obtaining very accurate estimations of the One Way Delay performance metric

  • Encaminamiento de flujos IP y conmutación óptica de flujos para la provisión distribuida de calidad de servicio

     Barlet Ros, Pere; López Brescó, Albert; Domingo Pascual, Jordi; Sole Pareta, Josep; Sanjuas Cuxart, Josep
    Participation in a competitive project

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  • Priority Mechanism for Multioperator FTTB Access Networks

     Santos Boada, German; Domingo Pascual, Jordi
    Proceedings of the 12th WSEAS International Conference on COMMUNICATIONS
    Presentation's date: 2008-07-23
    Presentation of work at congresses

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  • Network Performance Assessment Using Adaptive Traffic Sampling

     Serral Gracia, Rene; Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    NETWORKING 2008 AdHoc and Sensor Networks, Wireless Networks, Next Generation Internet
    Presentation of work at congresses

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  • distributed Samopling for On-Line SLA Assessment

     Domingo Pascual, Jordi
    IEEE Workshop on Local and Metropolitan Area Networks
    Presentation's date: 2008-09-03
    Presentation of work at congresses

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  • A Novel Available Bandwidht Estimation and Tracking Algorithm

     Cabellos Aparicio, Alberto; Francisco, J Garcia; Domingo Pascual, Jordi
    Sixth IEEE Workshop on End-to-End Monitoring Techniques and Services
    Presentation of work at congresses

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  • Packet loss estimation using distributed adaptive sampling

     Serral Gracia, Rene; Cabellos Aparicio, Alberto; Domingo Pascual, Jordi
    Sixth IEEE Workshop on End-to-End Monitoring Techniques and Services
    Presentation of work at congresses

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  • Wan Emulator

     Rus, Andrei Bogdan; Serral Gracia, Rene; Domingo Pascual, Jordi; Dobrota, Virgil
    7th International Conference Communications 2008
    Presentation's date: 2008-06-05
    Presentation of work at congresses

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  • Measurement-Based Analysis of the Performance of Several Wireless Technologies

     Cosma, Rares; Cabellos Aparicio, Alberto; Domenech, J; Martinez, Jorge; Cristian, Mihai; Fuentetaja, A; Lopez, A; Domingo Pascual, Jordi; Quemada, J
    IEEE Workshop on Local and Metropolitan Area Networks
    Presentation's date: 2008-09-03
    Presentation of work at congresses

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  • Coping with Distributed Monitoring of QoS-enabled Heterogeneous Networks

     Serral Gracia, Rene; Barlet Ros, Pere; Domingo Pascual, Jordi
    4th International Telecommunication Networking Workshop on QoS in Mutiservice IP Networks
    Presentation's date: 2008-02-13
    Presentation of work at congresses

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