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  • Eco-sustainable routing in optical networks

     Ricciardi, Sergio; Wang, Jiayuan; Palmieri, Francesco; Careglio, Davide; Manolova, Anna; Santos Boada, German
    Photonic network communications
    Date of publication: 2013-12-01
    Journal article

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    It is quite easy to foresee that in the next years, the future generation ultra-high speed network infrastructures and equipments will be no longer constrained only by their pure transport capacity, but also by their energy consumption costs and environmental effects. In particular, large network infrastructures are now widely recognized to play a fundamental role in the emission of green-house gases (GHG) in the atmosphere, significantly afecting the environmental sustainability of new evolutions in network architectures as well as technological developments in communication devices. In this paper, a novel eco-sustainable Routing and Wavelength Assignment (RWA) algorithm, based on shortest-path routing with an adaptive link weighting function relying on an extension of the OSPF-TE protocol to convey carbon footprint information, has been proposed to decrease the network ecological impact while balancing the traffic load and maintaining acceptable connection blocking rate. The trade-off between load balancing and carbon footprint is also analyzed to evaluate the efectiveness of the proposed strategy within the context of a real world network.

  • Modeling energy consumption in next-generation wireless access-over-WDM networks with hybrid power sources

     Ricciardi, Sergio; Palmieri, Francesco; Fiore, Ugo; Castiglione, Aniello; Santos Boada, German
    Mathematical and computer modelling
    Date of publication: 2013-09
    Journal article

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    Energy consumption is now one of the most important issues for network carriers, since the majority of the energy needed for their operation is consumed in the wireless access and optical transport networks. The continuous growth in the wireless customers and traffic volumes and the consequent energy demand on modern carriers¿ broadband infrastructures require reconsidering their energy efficiency, by starting from the formulation of new, more complete and representative network models that should become the foundations for modern energy-aware control plane architectures. Accordingly, this work presents a novel comprehensive energy model for next-generation wireless access-over-optical-transport networks characterized by hybrid power systems (i.e., multiple dynamically available power sources). The objective is to identify the energy-related information that need to be handled at the control plane layer to support energy-aware networking practices. Such information can be made available to suitable energy-aware routing and wavelength assignment algorithms that may exploit them to optimize the overall network energy-consumption and reducing the associated carbon footprint. The proposed model may be taken as a reference for the implementation of new energy-aware control plane protocols (routing and signaling) that make use of power-related considerations to achieve energy-efficiency and energy-awareness in wavelength-routed network infrastructures.

    Energy consumption is now one of the most important issues for network carriers, since the majority of the energy needed for their operation is consumed in the wireless access and optical transport networks. The continuous growth in the wireless customers and traffic volumes and the consequent energy demand on modern carriers’ broadband infrastructures require reconsidering their energy efficiency, by starting from the formulation of new, more complete and representative network models that should become the foundations for modern energy-aware control plane architectures. Accordingly, this work presents a novel comprehensive energy model for next-generation wireless access-over-optical-transport networks characterized by hybrid power systems (i.e., multiple dynamically available power sources). The objective is to identify the energy-related information that need to be handled at the control plane layer to support energy-aware networking practices. Such information can be made available to suitable energy-aware routing and wavelength assignment algorithms that may exploit them to optimize the overall network energy-consumption and reducing the associated carbon footprint. The proposed model may be taken as a reference for the implementation of new energy-aware control plane protocols (routing and signaling) that make use of power-related considerations to achieve energy-efficiency and energy-awareness in wavelength-routed network infrastructures.

  • Towards service orchestration between smart grids and telecom networks

     Ricciardi, Sergio; Santos Boada, German; Klinkowski, Miroslaw; Careglio, Davide; Palmieri, Francesco
    European Conference on Energy Efficiency in Large Scale Distributed Systems
    Presentation's date: 2013-04
    Presentation of work at congresses

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    In the last years, the research efforts in smart grids (SG) and telecommunication networks (TN) have been considerable but never converged to a common view and, due to the lack of strong interactions between the two worlds, only limited benefits have been achieved. We envision in this paper that future TN (as well as any other ICT application) will interact with the SG, enabling (1) the TN to know the energy source and cost that is currently powering its equipment, (2) to turn the TN into an active client which can request to the SG the quantity and quality (e.g. green) of energy that it needs, and (3) a service orchestration between SG supply system and TN operations. As a consequence, the enabled interoperability between TN and SG would allow TN to take energy-aware management decisions in function of energy-related information provided by the SG. For example, TN can route packets with the objective of optimizing green criteria, while SG can route the energy towards the TN clients with the objective of not wasting surpluses of green energy. These new energy and data routing capabilities can be exploited not only by SG operators and telecom carriers but also by any energy consumer/producer within the ICT world. This may include industry and institutional ICT premises, datacenters, home automation, wireless and mobile cellular networks, which will be able to implement their own energy-aware management and operations (M&O) by considering the quantity, quality and cost of the energy currently provided by the smart grid.

  • Evaluating energy savings in WoL-enabled networks of PCs

     Ricciardi, Sergio; Santos Boada, German; Careglio, Davide; Palmieri, Francesco; Fiore, Ugo
    IEEE International Symposium on Industrial Electronics
    Presentation's date: 2013-05
    Presentation of work at congresses

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    In this paper we present EnergySave, a smart energy-saving system that, by leveraging the consolidated WoL (Wake on LAN) technology, allows the remote wake-up of PCs from a centralized management server, providing easy and secure power management capabilities for local or remote IP-based networks of personal computers (PCs). We also present a lightweight web-based platform implementing the remote management interface as less intrusively as possible. Finally, we model the mathematical saving functions to be used in order to evaluate through simulation the amount of potential energy savings, and hence the whole framework effectiveness, both in the general case and in a real case scenario. Results show that significant savings are achievable provided that the hardware supports the Wake-on-LAN specifications and that proper configuration of the Web server is set-up, allowing the WoL magic packet to travel to the destination hosts and wake them up only when they are really needed.

  • An energy-aware dynamic RWA framework for next-generation wavelength-routed networks

     Ricciardi, Sergio; Palmieri, Francesco; Fiore, Ugo; Careglio, Davide; Santos Boada, German; Sole Pareta, Josep
    Computer networks
    Date of publication: 2012-07-05
    Journal article

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  • Towards energy-oriented telecommunication networks

     Ricciardi, Sergio; Palmieri, Francesco; Fiore, Ugo; Careglio, Davide; Santos Boada, German; Sole Pareta, Josep
    Date of publication: 2012-11-29
    Book chapter

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  • Green data center infrastructures in the cloud computing era

     Ricciardi, Sergio; Palmieri, Francesco; Torres Viñals, Jordi; Di Martino, Beniamino; Santos Boada, German; Sole Pareta, Josep
    Date of publication: 2012-11-29
    Book chapter

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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 .

  • Energy-Oriented Optimizations Towards Sustainable Internet

     Ricciardi, Sergio
    Defense's date: 2012-11-22
    Department of Computer Architecture, Universitat Politècnica de Catalunya
    Theses

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  • Towards an energy-aware internet: modeling a crosslayer optimization approach

     Ricciardi, Sergio; Careglio, Davide; Santos Boada, German; Sole Pareta, Josep; Fiore, Ugo; Palmieri, Francesco
    Telecommunication systems
    Date of publication: 2011-12-31
    Journal article

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    The containment of power consumption and the use of alternative green sources of energy are the new main goals of telecommunication operators, to cope with the rising energy costs, the increasingly rigid environmental standards, and the growing power requirements of modern high-performance networking devices. To address these challenges, we envision the necessity of introducing energy-efficiency and energy-awareness in the design, configuration and management of networks, and specifically in the design and implementation of enhanced control-plane protocols to be used in next generation networks. Accordingly, we focus on research and industrial challenges that foster new developments to decrease the carbon footprint while leveraging the capacities of highly dynamic, ultra-high-speed, networking. We critically discuss current approaches, research trends and technological innovations for the coming green era and we outline future perspectives towards new energy-oriented network planning, protocols and algorithms. We also combine all the above elements into a comprehensive energy-oriented network model within the context of a general constrained routing and wavelength assignment problem framework, and analyze and quantify through ILP formulations the savings that can be attained on the next generation networks.

  • Analyzing local strategies for energy efficient networking

     Ricciardi, Sergio; Careglio, Davide; Fiore, Ugo; Palmieri, Francesco; Santos Boada, German; Sole Pareta, Josep
    International Conferences on Networking
    Presentation's date: 2011-05-13
    Presentation of work at congresses

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  • Saving energy in data center infrastructures

     Ricciardi, Sergio; Careglio, Davide; Santos Boada, German; Sole Pareta, Josep; Fiore, Ugo; Palmieri, Francesco
    International Conference on Data Compression, Communication and Processing
    Presentation's date: 2011-06-21
    Presentation of work at congresses

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    At present, data centers consume a considerable percentage of the worldwide produced electrical energy, equivalent to the electrical production of 26 nuclear power plants, and such energy demand is growing at fast pace due to the ever increasing data volumes to be processed, stored and accessed every day in the modern grid and cloud infrastructures. Such energy consumption growth scenario is clearly not sustainable and it is necessary to limit the data center power budget by controlling the absorbed energy while keeping the desired level of service. In this paper, we describe Energy Farm, a data center energy manager that exploits load fluctuations to save as much energy as possible while satisfying quality of service requirements. Energy Farm achieves energy savings by aggregating traffic during low load periods and temporary turning off a subset of computing resources. Energy Farm respects the logical and physical dependencies of the interconnected devices in the data center and performs automatic shut down even in emergency cases such as temperature peaks and power leakages. Results show that high resource utilization efficiency is possible in data center infrastructures and that huge savings in terms of energy (MWh), emissions (tons of CO2) and costs (kε) are achievable.

  • Energy-aware RWA for WDM networks with dual power sources

     Ricciardi, Sergio; Careglio, Davide; Palmieri, Francesco; Fiore, Ugo; Santos Boada, German; Sole Pareta, Josep
    IEEE International Conference on Communications
    Presentation's date: 2011-06
    Presentation of work at congresses

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  • DISEÑO Y OPTIMIZACIÓN DE REDES ÓPTICAS MULTI-CAPA CONSCIENTES DEL GASTO ENERGÉTICO

     Santos Boada, German; Sole Pareta, Josep; Pedroso Mendonça, Pedro; Sócrates Dantas, Joana; Ricciardi, Sergio; Pedrola Escriba, Oscar; Careglio, Davide
    Participation in a competitive project

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    Energy-oriented models for WDM networks  Open access

     Ricciardi, Sergio; Careglio, Davide; Palmieri, Francesco; Fiore, Ugo; Santos Boada, German; Sole Pareta, Josep
    International ICST Conference on Broadband Communications, Networks, and Systems (Broadnets)
    Presentation's date: 2010-10
    Presentation of work at congresses

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    A realistic energy-oriented model is necessary to formally characterize the energy consumption and the consequent carbon footprint of actual and future high-capacity WDM networks. The energy model describes the energy consumption of the various network elements (NE) and predicts their energy consumption behavior under different traffic loads and for the diverse traffic types, including all optical and electronic traffic, O/E/O conversions, 3R regenerations, add/drop multiplexing, etc. Besides, it has to be scalable and simple to implement, manage and modify according to the new architecture and technologies advancements. In this paper, we discuss the most relevant energy models present in the literature highlighting possible advantages, drawbacks and utilization scenarios in order to provide the research community with an overview over the different energy characterization frameworks that are currently being employed in WDM networks.

    Postprint (author’s final draft)

  • 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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  • Energy aware paradigm for energy efficient ICT: a systemic approach

     Ricciardi, Sergio; Careglio, Davide; Santos Boada, German; Sole Pareta, Josep
    International Conference on Energy-Efficient Computing and Networking
    Presentation's date: 2010-04-13
    Presentation of work at congresses

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    In this work we describe the Energy Aware Paradigm we believe should be adopted for successfully designing and deploying energy efficient ICT (Information and Communication Technologies) based systems.

  • Integració del aprenentatge cooperatiu i del ensenyamlent expositiu a través del campus virtual  Open access

     Santos Boada, German; Sole Pareta, Josep
    Jornada Dia d'Atenea
    Presentation's date: 2009-06-12
    Presentation of work at congresses

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    Es presenta un model per compaginar l'activitat docent expositiva i l'aprenentatge cooperatiu utilitzant les eines del campus virtual ATENEA. El mètode docent utilitzat està fonamentat en l'ús de les metodologies educatives grupals seguint el model EEES i realitzant part de les seves activitats fora de les aules de manera virtual i amb això optimitzar l'ús del temps dins de les mateixes. Els resultats obtinguts, en una assignatura tecnològica de segon cicle, indiquen que la metodologia millora els resultats acadèmics i de qualitat, i que millora la responsabilitat i implicació dels alumnes en el seu procés d'aprenentatge.

  • Energy efficiency in large scale distributed systems

     Santos Boada, German; Ricciardi, Sergio; Careglio, Davide
    Participation in a competitive project

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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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    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?

  • Present y futur de les telecomunicacions a Barcelona

     Santos Boada, German
    Date of publication: 2008-05
    Book chapter

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  • Aprendre a aprendre: un repte docent assolible

     Santos Boada, German; Sole Pareta, Josep
    Congrés Internacional de Docència Universitària i Innovació
    Presentation of work at congresses

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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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  • Interdependència positiva i avaluació participativa en el marc de l'EEES: experiència d'SPD

     Santos Boada, German; Sole Pareta, Josep
    Jornades de Docència del Departament d'Arquitectura de Computadors
    Presentation's date: 2007-02-10
    Presentation of work at congresses

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  • Virtual positive interdependence in higher education

     Daniel, Ricart; Sole Pareta, Josep; Santos Boada, German
    IV International Conference on Education
    Presentation's date: 2007-07-06
    Presentation of work at congresses

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  • Interdependència positiva i avaluació participativa en el marc de l'EEES

     Sole Pareta, Josep; Santos Boada, German
    Jornades de Docència del Departament d'Arquitectura de Computadors. 10 Anys de Jornades
    Presentation of work at congresses

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  • Virtual Campus as a Tool for Collaborative Learning and Expositive teaching Integration in the European Higher Education Space (EHES)

     Sole Pareta, Josep; Santos Boada, German
    8 th International Conference on Information Technology Based Higher Education and Training
    Presentation's date: 2007-07-12
    Presentation of work at congresses

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  • El idioma vehicular docente un reto a la movilidad en el Espacio Europeo de Enseñanza Superior

     Santos Boada, German; Sole Pareta, Josep
    Jornadas de Enseñanza Universitaria de la Informática
    Presentation's date: 2007-07-16
    Presentation of work at congresses

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  • Televisión digital sobre ADSL

     Santos Boada, German
    Novática: revista de la Asociación de Técnicos de Informática
    Date of publication: 2006-10
    Journal article

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  • Quality of Service in Multioperator GPON Access Networks with Triple-Play Services

     Santos Boada, German; Domingo Pascual, Jordi
    Enformatika
    Date of publication: 2006-12
    Journal article

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  • CONTENT Networks and Services for Home Users

     Domingo Pascual, Jordi; Cabellos Aparicio, Alberto; Santos Boada, German; Yannuzzi, Marcelo; Masip Bruin, Javier; Serral Gracia, Rene
    Participation in a competitive project

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  • Informática y telecomunicación: el acicate de la sobrenota

     Santos Boada, German; Sole Pareta, Josep
    Jornadas de Enseñanza Universitaria de la Informática
    Presentation's date: 2006-07-12
    Presentation of work at congresses

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  • Quality of Service in Multioperator GPON Access Networks with Triple Play Services

     Domingo Pascual, Jordi; Santos Boada, German
    XVIII International Conference on Computer and Information Science
    Presentation's date: 2006-12-16
    Presentation of work at congresses

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  • Positive Interdependence and Participative Assessment as Cohesive Elements in Group Teaching

     Santos Boada, German; Sole Pareta, Josep
    International Symposium on Computers in Education
    Presentation's date: 2006-10-24
    Presentation of work at congresses

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  • Evaluacion participativa ECTS en Ingenieria Informatica

     Santos Boada, German; Sole Pareta, Josep
    Jornadas Nacionales de Intercambio de Experiencias Piloto de Implatacion de Metodologias ECTS
    Presentation of work at congresses

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  • Provisión de Servicios de Red Interdominio (CEPS)

     Domingo Pascual, Jordi; Cabellos Aparicio, Alberto; Santos Boada, German; Barlet Ros, Pere; Yannuzzi, Marcelo; Masip Bruin, Javier; Sanchez Lopez, Sergio; Vilà Martí, Frederic; Serral Gracia, Rene
    Participation in a competitive project

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  • End-to-end Quality of Service support over heterogeneous networks (EuQoS)

     Domingo Pascual, Jordi; Cabellos Aparicio, Alberto; Santos Boada, German; Yannuzzi, Marcelo; Fornes De Juan, Jorge; Masip Bruin, Javier; Sanchez Lopez, Sergio; Serral Gracia, Rene
    Participation in a competitive project

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  • Servicios avanzados con movilidad (SAM)

     Domingo Pascual, Jordi; Cabellos Aparicio, Alberto; Sole Pareta, Josep; Santos Boada, German; Barlet Ros, Pere; Mangues Bafalluy, Josep; Yannuzzi, Marcelo; Marín Tordera, Eva; Kishimoto Bisbe, Carles; Masip Bruin, Javier; Sanchez Lopez, Sergio; Serral Gracia, Rene
    Participation in a competitive project

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  • Tecnología informática aplicada al e-commerce

     Santos Boada, German
    Date of publication: 2001-02
    Book

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  • Experiències de docència en un entorn de tele-ensenyament distribuït

     Veciana Nogues, Carlos; Domingo Pascual, Jordi; Sole Pareta, Josep; Santos Boada, German
    Congrés Internacional de Docència Universitària i Innovació
    Presentation's date: 2000-06-26
    Presentation of work at congresses

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  • Nuevos Servicios para la red académica de Banda Ancha 2 (SABA2)

     Gil Gómez, Maria Luisa; Domingo Pascual, Jordi; Cabellos Aparicio, Alberto; Sole Pareta, Josep; Santos Boada, German; Veciana Nogues, Carlos; Mangues Bafalluy, Josep; Masip Bruin, Javier; Sanchez Lopez, Sergio; Serral Gracia, Rene
    Participation in a competitive project

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  • ISDN as a Residential ATM Access Network for Broadband Services

     Sole Pareta, Josep; Domingo Pascual, Jordi; Santos Boada, German; Rius, A
    Date: 1998-09
    Report

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  • ISDN as a residential ATM acces network for brodband services

     Sole Pareta, Josep; Domingo Pascual, Jordi; Antoni, Riu; Santos Boada, German
    XII International Symposium on Services and Local Access (ISSLS'98)
    Presentation's date: 1998-03-22
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  • SABA (Demostrador de nous serveis per a la xarxa acadèmica de banda ampla)

     Domingo Pascual, Jordi; Sole Pareta, Josep; Vila Sallent, Joan; Santos Boada, German; Veciana Nogues, Carlos; Martinez Alvarez, Xavier; Masip Bruin, Javier; Sanchez Lopez, Sergio
    Participation in a competitive project

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  • Supporting Distance Learning Applications on Top of Current Public Bearer Services

     Sole Pareta, Josep; Santos Boada, German; Noguera, Germán Santos I F
    XI International Symposium on Subscriber Loops & Services (ISSLS'96)
    Presentation's date: 1996-02-04
    Presentation of work at congresses

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  • TEL96-1961-E : Servcios de Banda Ancha especializados y de formación del Centro de Comunicaciones Avanzadas de Banda Ancha

     Domingo Pascual, Jordi; Sole Pareta, Josep; Santos Boada, German
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  • TIC95-0982-CO2-01 ABR (Available Bit Rate) y redes de ámbito local con tecnología ATM

     Casals Torres, Olga M.; Sole Pareta, Josep; Santos Boada, German; Domingo Pascual, Jordi; Cerdà Alabern, Llorenç
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  • Análisis y evaluación de los sistemas de protección contra la congestión en la RDSI-BA

     Santos Boada, German
    Defense's date: 1993-02-10
    Department of Computer Architecture, Universitat Politècnica de Catalunya
    Theses

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