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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.

  • On the Scalability Limits of Communication Networks to the Nanoscale

     Llatser Marti, Ignacio
    Defense's date: 2014-01-17
    Universitat Politècnica de Catalunya
    Theses

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    Los nanosistemas, sistemas integrados con un tamaño total de unos pocos micrómetros, son capaces de interactuar en la nanoescala, pero su corto radio de acción limita su utilidad en escenarios prácticos. Las nanoredes, que surgen de la interconexión de nanosistemas, amplían su ámbito de operación permitiendo la comunicación entre nanosistemas, aumentando de esta forma sus aplicaciones potenciales. Con el fin de dotar de capacidades de comunicación a los nanosistemas, su subsistema de comunicación debe reducirse a unos pocos micrómetros. Existen dudas sobre la viabilidad de miniaturizar las antenas metálicas actuales a un tamaño tan pequeño, especialmente porque su frecuencia de resonancia sería extremadamente alta (en el espectro óptico), lo que causaría a una gran atenuación de las ondas radiadas. Como alternativa, se han propuesto dos nuevos paradigmas para implementar comunicaciones inalámbricas entre nanosistemas: las comunicaciones moleculares y las comunicaciones inalámbricas basadas en grafeno. Por un lado, las comunicaciones moleculares consisten en el intercambio de moléculas entre nanosistemas, inspirado en la comunicación entre células vivas. En las comunicaciones moleculares basadas en difusión (DMC), las moléculas emitidas se propagan por el medio mediante un proceso de difusión hasta que alcanzan el receptor. Por otro lado, el grafeno (una lámina de átomos de carbono de un átomo de espesor) permite implementar antenas de grafeno plasmónicas, o grafenas. Debido a efectos plasmónicos, grafenas con un tamaño de unos pocos micrómetros radian ondas en la banda de terahercios, dando lugar al paradigma de las comunicaciones inalámbricas basadas en grafeno (GWC). Para averiguar cómo escalan las redes de comunicación a medida que se reducen sus dimensiones, esta tesis se presenta un análisis de la escalabilidad de las redes de comunicaciones hacia la nanoescala, siguiendo un modelo general con la menor cantidad posible de hipótesis. Hemos propuesto dos esquemas de detección en DMC: detección de amplitud y detección de energía. Hemos identificado importantes métricas de rendimiento y calculado su escalabilidad con respecto a la distancia de transmisión, que difiere significativamente respecto a las comunicaciones inalámbricas tradicionales. Estas nuevas tendencias de escala requieren el diseño de nuevos protocolos de red especialmente adaptados a las redes de DMC. El análisis de la propagación de ondas plasmónicas en grafenas permite determinar sus propiedades de radiación. En particular, la frecuencia de resonancia de las grafenas no sólo es más baja que en antenas metálicas, sino que también aumenta más lentamente a medida que reducimos su longitud. Por otra parte, la frecuencia de resonancia de las grafenas puede ser ampliamente controlada en función de parámetros como las dimensiones de la grafena, el tiempo de relajación del grafeno y el potencial químico. Además, proponemos un montaje experimental que permite la medición de grafenas alimentadas con una fuente fotoconductora. También hemos analizado los efectos de la absorción molecular en el canal de terahercios a corto alcance, el escenario de operación de las grafenas. La absorción molecular es un proceso por el cual moléculas presentes en la atmósfera absorben parte de la energía de las ondas radiadas por las grafenas, degradando su rendimiento. Hemos cuantificado esta degradación derivando parámetros de rendimiento en este escenario, que muestran novedosas tendencias de escalabilidad en función de la distancia de transmisión. Por último, hemos encontrado que la capacidad de canal de GWC escala mejor a medida que el tamaño de la antena se reduce con respecto a las comunicaciones inalámbricas tradicionales. En consecuencia, las GWC requerirán una potencia de transmisión más baja para lograr un cierto rendimiento. Estos resultados establecen un marco general que puede servir de guía para diseñar las futuras redes de comunicaciones inalámbricas entre nanosistemas.

  • LISP-MN: mobile networking through LISP

     Rodriguez Natal, Alberto; Lorand, Jakab; Portoles Comeras, Marc; Ermagan, Vina; Natarajan, Preethi; Maino, Fabio; Meyer, David; Cabellos Aparicio, Alberto
    Wireless personal communications
    Date of publication: 2013-05
    Journal article

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    The current Internet architecture was not designed to easily accommodate mobility because IP addresses are used both to identify and locate hosts. The Locator/Identifier Separation Protocol (LISP) decouples them by considering two types of addresses: EIDs that identify hosts, and RLOCs that identify network attachment points and are used as routing locators. LISP, with such separation in place, can also offer native mobility. LISP-MN is a particular case of LISP which specifies mobility. In this paper we provide a comprehensive tutorial on LISP-MN, showing its main features and how it compares to existing mobility protocols

    ThecurrentInternetarchitecturewasnotdesignedtoeasilyaccommodatemobil- ity because IP addresses are used both to identify and locate hosts. The Locator/Identifier Separation Protocol (LISP) decouples them by considering two types of addresses: EIDs that identify hosts, and RLOCs that identify network attachment points and are used as routing locators. LISP, with such separation in place, can also offer native mobility. LISP-MN is a particular case of LISP which specifies mobility. In this paper we provide a comprehensive tutorial on LISP-MN, showing its main features and how it compares to existing mobility protocols

  • 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.

  • Area and laser power scalability analysis in photonic networks-on-chip

     Abadal Cavalle, Sergi; Cabellos Aparicio, Alberto; Lazaro Villa, Jose Antonio; Nemirovsky, Mario; Alarcon Cot, Eduardo Jose; Sole Pareta, Josep
    International Conference on Optical Network Design and Modeling
    Presentation's date: 2013-04-18
    Presentation of work at congresses

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    In the last decade, the field of microprocessor architecture has seen the rise of multicore processors, which consist of the interconnection of a set of independent processing units or cores in the same chip. As the number of cores per multiprocessor increases, the bandwidth and energy requirements for their interconnection networks grow exponentially and it is expected that conventional on-chip wires will not be able to meet such demands. Alternatively, nanophotonics has been regarded as a strong candidate for chip communication since it could provide high bandwidth with low area and energy footprints. However, issues such as the unavailability of efficient on-chip light sources or the difficulty of implementing all-optical buffering or header processing hinder the development of scalable photonic on-chip networks. In this paper, the area and laser power of several photonic on-chip network proposals is analytically modeled and its scalability is evaluated. Also, a graphene-based hybrid approach is presented

    In the last decade, the field of microprocessor architecture has seen the rise of multicore processors, which consist of the interconnection of a set of independent processing units or cores in the same chip. As the number of cores per multiprocessor increases, the bandwidth and energy requirements for their interconnection networks grow exponentially and it is expected that conventional on-chip wires will not be able to meet such demands. Alternatively, nanophotonics has been regarded as a strong candidate for chip communication since it could provide high bandwidth with low area and energy footprints. However, issues such as the unavailability of efficient on-chip light sources or the difficulty of implementing all-optical buffering or header processing hinder the development of scalable photonic on-chip networks. In this paper, the area and laser power of several photonic on-chip network proposals is analytically modeled and its scalability is evaluated. Also, a graphene-based hybrid wireless/optical-wired approach is presented, aiming at enabling end-to-end photonic on-chip networks to scale beyond thousands of cores

  • Detection techniques for diffusion-based molecular communication

     Llatser Marti, Ignacio; Cabellos Aparicio, Alberto; Pierobon, Massimiliano; Alarcon Cot, Eduardo Jose
    IEEE journal on selected areas in communications
    Date of publication: 2013-12-01
    Journal article

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    Nanonetworks, the interconnection of nanosystems, are envisaged to greatly expand the applications of nanotechnology in the biomedical, environmental and industrial fields. However, it is still not clear how these nanosystems will communicate among them. This work considers a scenario of Diffusion-based Molecular Communication (DMC), a promising paradigm that has been recently proposed to implement nanonetworks. In a DMC network, transmitters encode information by the emission of molecules which diffuse throughout the medium, eventually reaching the receiver locations. In this scenario, a pulse-based modulation scheme is proposed and two techniques for the detection of the molecular pulses, namely, amplitude detection and energy detection, are compared. In order to evaluate the performance of DMC using both detection schemes, the most important communication metrics in each case are identified. Their analytical expressions are obtained and validated by simulation. Finally, the scalability of the obtained performance evaluation metrics in both detection techniques is compared in order to determine their suitability to particular DMC scenarios. Energy detection is found to be more suitable when the transmission distance constitutes a bottleneck in the performance of the network, whereas amplitude detection will allow achieving a higher transmission rate in the cases where the transmission distance is not a limitation. These results provide interesting insights which may serve designers as a guide to implement future DMC networks. © 1983-2012 IEEE.

  • 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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  • 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.

  • Characterization of graphene-based nano-antennas in the terahertz band

     Llatser Marti, Ignacio; Kremers, Christian; Chigrin, Dmitry N.; Jornet, Josep Miquel; Lemme, Max C.; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    European Conference on Antennas and Propagation
    Presentation's date: 2012-03-26
    Presentation of work at congresses

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  • Comparison of the resonant frequency in graphene and metallic nano-antennas

     Llatser Marti, Ignacio; Kremers, Christian; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose; Chigrin, Dmitry N.
    International Workshop on Theoretical and Computational Nanophotonics
    Presentation's date: 2012
    Presentation of work at congresses

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  • Quorum sensing-enabled amplification for molecular nanonetworks

     Abadal Cavalle, Sergi; Llatser Marti, Ignacio; Alarcon Cot, Eduardo Jose; Cabellos Aparicio, Alberto
    IEEE International Workshop on Molecular and Nano Scale Communication
    Presentation's date: 2012-06
    Presentation of work at congresses

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  • 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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  • Radiation characteristics of tunable graphennas in the terahertz band

     Llatser Marti, Ignacio; Kremers, Christian; Chigrin, Dmitry N.; Jornet, Josep Miquel; Lemme, Max C.; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    Radioengineering
    Date of publication: 2012-12
    Journal article

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  • Graphene-based nano-patch antenna for terahertz radiation

     Llatser Marti, Ignacio; Kremers, Christian; Cabellos Aparicio, Alberto; Jornet, Josep Miquel; Alarcon Cot, Eduardo Jose; Chigrin, Dmitry N.
    Photonics and nanostructures. Fundamentals and applications
    Date of publication: 2012-10
    Journal article

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  • 2012 SAMSUNG Global Research Outreach GIFT

     Alarcon Cot, Eduardo Jose; Cabellos Aparicio, Alberto
    Award or recognition

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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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  • Graphene-enabled hybrid architectures for multiprocessors: bridging nanophotonics and nanoscale wireless communication

     Abadal Cavalle, Sergi; Cabellos Aparicio, Alberto; Lazaro Villa, Jose Antonio; Alarcon Cot, Eduardo Jose; Sole Pareta, Josep
    International Conference on Transparent Optical Networks
    Presentation's date: 2012-07-04
    Presentation of work at congresses

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  • Networking challenges and principles in diffusion-based molecular communication

     Llatser Marti, Ignacio; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    IEEE Wireless communications
    Date of publication: 2012-10
    Journal article

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    Nanotechnology has allowed building nanomachines capable of performing simple tasks, such as sensing, data storage, and actuation. Nanonetworks, networks of nanomachines, will allow cooperation and information sharing among them, thereby greatly expanding the applications of nanotechnology in the biomedical, environmental,and industrial fields. One of the most promising paradigms to implement nanonetworks is diffusion-based molecular communication (DMC). In DMC, nanomachines transmit information by the emission of molecules that diffuse throughout the medium until they reach their destination. Most of the existing literature in DMC has focused on the analysis of its physical channel. In this work, the key differences of the physical channel of DMC with respect to the wireless electromagnetic channel are reviewed with the purpose of learning how they impact the design of networks using DMC. In particular, we find that the uniqueness of the physical channel of DMC will require revisiting most of the protocols and techniques developed for traditional wireless networks in order to adapt them to DMC networks. Furthermore, guidelines for the design of a novel network architecture for DMC networks, including fundamental aspects such as coding, medium access control, addressing, routing and synchronization, are provided.

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    Exploring the physical channel of diffusion-based molecular communication by simulation  Open access

     Llatser Marti, Ignacio; Pascual, Iñaki; Garralda, N.; Cabellos Aparicio, Alberto; Pierobon, Massimiliano; Alarcon Cot, Eduardo Jose; Sole Pareta, Josep
    IEEE Global Communications Conference
    Presentation's date: 2011-12
    Presentation of work at congresses

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    Diffusion-based molecular communication is a promising bio-inspired paradigm to implement nanonetworks, i.e., the interconnection of nanomachines. The peculiarities of the physical channel in diffusion-based molecular communication require the development of novel models, architectures and protocols for this new scenario, which need to be validated by simulation. With this purpose, we present N3Sim, a simulation framework for diffusion-based molecular communication. N3Sim allows to simulate scenarios where transmitters encode the information by releasing molecules into the medium, thus varying their local concentration. N3Sim models the movement of these molecules according to Brownian dynamics, and it also takes into account their inertia and the interactions among them. Receivers decode the information by sensing the particle concentration in their neighborhood. The benefits of N3Sim are multiple: the validation of channel models for molecular communication and the evaluation of novel modulation schemes are just a few examples.

    Postprint (author’s final draft)

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    Scattering of terahertz radiation on a graphene-based nano-antenna  Open access

     Llatser Marti, Ignacio; Kremers, Christian; Cabellos Aparicio, Alberto; Jornet, Josep Miquel; Alarcon Cot, Eduardo Jose; Chigrin, Dmitry N.
    International Workshop on Theoretical and Computational Nanophotonics
    Presentation of work at congresses

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    Scattering of the terahertz radiation on a graphene-based nano-antenna is considered. Different electromagnetic models of graphene are discussed and applied to calculate extinction, scattering and absorption cross sections of the nano-antenna. Scattering resonances in the terahertz band are identified as longitudinal Fabry-Perot resonances of surface plasmon polaritons supported by the graphene layer. A simple while powerful model, based on the effective mode index of plasmon polaritons, is proposed to predict the antenna resonant properties. A systematic numerical study of the graphene-based nano-antenna is presented for different antenna dimensions. Finally, the potential of graphene-based nano-antennas for terahertz applications is discussed.

  • Simulation-based evaluation of the diffusion-based physical channel in molecular nanonetworks

     Garralda, N.; Llatser Marti, Ignacio; Cabellos Aparicio, Alberto; Pierobon, Massimiliano
    IEEE International Workshop on Molecular and Nano Scale Communication
    Presentation's date: 2011-04-10
    Presentation of work at congresses

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  • Analysis of the impact of sampling on NetFlow traffic classification

     Carela Español, Valentin; Barlet Ros, Pere; Cabellos Aparicio, Alberto; Sole Pareta, Josep
    Computer networks
    Date of publication: 2011-04-01
    Journal article

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  • Diffusion-based physical channel identification in molecular nanonetworks

     Garralda, N.; Llatser Marti, Ignacio; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose; Pierobon, Massimiliano
    Nano communication networks
    Date of publication: 2011-12
    Journal article

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    Physical channel characterization for medium-range nanonetworks using flagellated bacteria  Open access

     Gregori, Maria; Llatser Marti, Ignacio; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    Computer networks
    Date of publication: 2011-02-21
    Journal article

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    Nano-networks are the interconnection of nano-machines and as such expand the limited capabilities of a single nano-machine. Several techniques have been proposed so far to interconnect nano-machines. For short dis- tances (nm-mm ranges), researchers are proposing to use molecular motors and calcium signaling. For long distances (mm-m), pheromones are envisioned to transport information. In this work we propose a new mechanism for medium-range communications (nm- m): agellated bacteria. This technique is based on the transport of DNA-encoded information between emitters and receivers by means of a bacterium. We present a physical channel characterization and a simulator that, based on the previous characterization, simulates the transmission of a DNA-packet between two nano-machines.

  • Path-vector routing stability analysis

     Papadimitriou, Dimitri; Coras, Florin-tudorel; Cabellos Aparicio, Alberto
    ACM SIGMETRICS Performance Evaluation Review
    Date of publication: 2011-12
    Journal article

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    In this paper, we define a set of metrics that characterize the local stability properties of path-vector routing protocols such as BGP (Border Gateway Protocol). By means of these stability metrics, we propose a method to analyze the effects of BGP policy- and protocol-induced instability on local routers.

    In this paper, we define a set of metrics that characterize the local stability properties of path-vector routing protocols such as BGP (Border Gateway Protocol). By means of these stability metrics, we propose a method to analyze the effects of BGP policy- and protocol-induced instability on local routers.

  • 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.

  • GMPLS-OBS Interoperability And Routing Scalability in Internet  Open access

     Mendonça Pedroso, Pedro Miguel
    Defense's date: 2011-12-16
    Department of Computer Architecture, Universitat Politècnica de Catalunya
    Theses

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    The popularization of Internet has turned the telecom world upside down over the last two decades. Network operators, vendors and service providers are being challenged to adapt themselves to Internet requirements in a way to properly serve the huge number of demanding users (residential and business). The Internet (data-oriented network) is supported by an IP packet-switched architecture on top of a circuit-switched, optical-based architecture (voice-oriented network), which results in a complex and rather costly infrastructure to the transport of IP traffic (the dominant traffic nowadays). In such a way, a simple and IP-adapted network architecture is desired. From the transport network perspective, both Generalized Multi-Protocol Label Switching (GMPLS) and Optical Burst Switching (OBS) technologies are part of the set of solutions to progress towards an IP-over-WDM architecture, providing intelligence in the control and management of resources (i.e. GMPLS) as well as a good network resource access and usage (i.e. OBS). The GMPLS framework is the key enabler to orchestrate a unified optical network control and thus reduce network operational expenses (OPEX), while increasing operator's revenues. Simultaneously, the OBS technology is one of the well positioned switching technologies to realize the envisioned IP-over-WDM network architecture, leveraging on the statistical multiplexing of data plane resources to enable sub-wavelength in optical networks. Despite of the GMPLS principle of unified control, little effort has been put on extending it to incorporate the OBS technology and many open questions still remain. From the IP network perspective, the Internet is facing scalability issues as enormous quantities of service instances and devices must be managed. Nowadays, it is believed that the current Internet features and mechanisms cannot cope with the size and dynamics of the Future Internet. Compact Routing is one of the main breakthrough paradigms on the design of a routing system scalable with the Future Internet requirements. It intends to address the fundamental limits of current stretch-1 shortest-path routing in terms of RT scalability (aiming at sub-linear growth). Although "static" compact routing works fine, scaling logarithmically on the number of nodes even in scale-free graphs such as Internet, it does not handle dynamic graphs. Moreover, as multimedia content/services proliferate, the multicast is again under the spotlight as bandwidth efficiency and low RT sizes are desired. However, it makes the problem even worse as more routing entries should be maintained. In a nutshell, the main objective of this thesis in to contribute with fully detailed solutions dealing both with i) GMPLS-OBS control interoperability (Part I), fostering unified control over multiple switching domains and reduce redundancy in IP transport. The proposed solution overcomes every interoperability technology-specific issue as well as it offers (absolute) QoS guarantees overcoming OBS performance issues by making use of the GMPLS traffic-engineering (TE) features. Keys extensions to the GMPLS protocol standards are equally approached; and ii) new compact routing scheme for multicast scenarios, in order to overcome the Future Internet inter-domain routing system scalability problem (Part II). In such a way, the first known name-independent (i.e. topology unaware) compact multicast routing algorithm is proposed. On the other hand, the AnyTraffic Labeled concept is also introduced saving on forwarding entries by sharing a single forwarding entry to unicast and multicast traffic type. Exhaustive simulation campaigns are run in both cases in order to assess the reliability and feasible of the proposals.

  • Asistencia a las reuniones periódicas de la IETF

     Cabellos Aparicio, Alberto
    Participation in a competitive project

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  • Organización de IEEE Monacom 2011

     Sole Pareta, Josep; Cabellos Aparicio, Alberto
    Participation in a competitive project

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  • Large-scale measurement experiments of P2P-TV systems insights on fairness and locality

     Silverston, Thomas; Jakab, Lorand; Cabellos Aparicio, Alberto; Fourmaux, Olivier; Salamatian, Kavé; Kenjiro, Cho
    Signal processing: image communication
    Date of publication: 2011-08
    Journal article

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    P2P-TV is an emerging alternative to classical television broadcast systems. Leveraging possibilities offered by the Internet, several companies offer P2P-TV services to their customers. The overwhelming majority of these systems, however, is of closed nature, offering little insight on their traffic properties. For a better understanding of the P2P- TV landscape, we performed measurement experiments in France, Japan, Spain, and Romania, using different commercial applications. By using multiple measurement points in different locations of the world, our results can paint a global picture of the measured networks, inferring their main properties. More precisely, we focus on the level of collaboration between peers, their location and the effect of the traffic on the networks. Our results show that there is no fairness between peers and that is an important issue for the scalability of P2P-TV systems. Moreover, hundreds of Autonomous Systems are involved in the P2P-TV traffic and it points out the lack of locality-aware mechanisms for these systems. The geographic location of peers testifies the wide spread of these applications in Asia and highlights their worldwide usage.

  • N3Sim: A simulation framework for diffusion-based molecular communication

     Llatser Marti, Ignacio; Pascual, I.; Garralda, N.; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    IEEE TCSIM Newsletter
    Date of publication: 2011-03
    Journal article

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    We designed N3Sim in order to simulate a set of nanomachines which communicate through molecular diffusion in a fluid medium.

  • 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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  • Profile deformation of aggregated flows handled by premium and low priority services within the Géant network

     Mongay Batalla, Jordi; Beben, Andrzej; Cabellos Aparicio, Alberto
    International Wireless Communications and Mobile Computing Conference
    Presentation's date: 2010
    Presentation of work at congresses

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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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  • Physical channel characterization for medium-range nanonetworks using catalytic nanomotors

     Gregori, Maria; Llatser Marti, Ignacio; Cabellos Aparicio, Alberto; Alarcon Cot, Eduardo Jose
    Nano communication networks
    Date of publication: 2010-06
    Journal article

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  • LISP-TREE: A DNS Hierarchy to Support the LISP Mapping System

     Jakab, Lorand; Cabellos Aparicio, Alberto; Coras, Florin-tudorel; Saucez, Damien; Bonaventure, Olivier
    IEEE journal on selected areas in communications
    Date of publication: 2010-10
    Journal article

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  • Enabling Electromagnetic Communication among Nanosensor Devices (ELCONA)

     Sole Pareta, Josep; Cabellos Aparicio, Alberto
    Participation in a competitive project

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  • Fundamentals an Applications of Molecular Nanonetworks

     Sole Pareta, Josep; Cabellos Aparicio, Alberto
    Participation in a competitive project

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  • REDES CONVERGENTES Y OMNIPRESENTES

     Cabellos Aparicio, Alberto; Domingo Pascual, Jordi; Jakab, Lorand; Barlet Ros, Pere; Careglio, Davide; Cruellas Ibarz, Juan Carlos; 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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  • Experimental UpdateLess Evolutive Routing

     Perello Muntan, Jordi; Spadaro, Salvatore; Sole Pareta, Josep; Cabellos Aparicio, Alberto; Careglio, Davide
    Participation in a competitive project

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  • Experimental UpdateLess Evolutive Routing

     Junyent Giralt, Gabriel; Comellas Colome, Jaume; Cabellos Aparicio, Alberto; Careglio, Davide; Perello Muntan, Jordi; Sole Pareta, Josep; Spadaro, Salvatore
    Participation in a competitive project

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  • 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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  • A collaborative P2P scheme for NAT Traversal Server discovery based on topological information

     Cuevas, Ruben; Cuevas, Angel; Cabellos Aparicio, Alberto; Jakab, Lorand; Guerrero, Carmen
    Computer networks
    Date of publication: 2010-08-26
    Journal article

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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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  • 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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  • 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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  • Preparación propuesta proyecto STREP FP7-Call5 EULER

     Sole Pareta, Josep; Cabellos Aparicio, Alberto; Careglio, Davide
    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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