Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 50 of 217 results
  • Resource Management Research in Ethernet Passive Optical Networks  Open access

     Garfias Hernández, Paola
    Defense's date: 2013-11-25
    Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Durante las últimas décadas, hemos sido testigos de diferentes fenómenos en el sector de las telecomunicaciones. Uno de ellos es el uso generalizado de Internet, que ha traído un fuerte aumento en el tráfico, lo que obliga a los proveedores a expandir continuamente la capacidad en las redes.En el futuro próximo, Internet se compondrá de redes ópticas de alta velocidad y de largo alcance; un número de redes inalámbricas en los bordes, y en el medio varias tecnologías de acceso. Hoy en día uno de los principales problemas de Internet es el cuello de botella en el segmento de acceso. Para solucionar este problema las redes óticas pasivas (PON) se han presentado con gran éxito, debido a su simplicidad, bajo costo, y el aumento de ancho de banda.Una red PON se compone de cableado de fibra óptica y divisores pasivos y acopladores que distribuyen una señal óptica a los conectores que terminan cada segmento de fibra. Entre las diferentes tecnologías PON, la PON basada en Ethernet (EPON) es un gran alternativa para satisfacer las necesidades del operador y del usuario, debido a su coste, su flexibilidad e interoperabilidad con otras tecnologías.Uno de los retos más interesantes para dichas tecnologías se refiere a la programación y asignación de recursos en el canal compartido, es decir, la gestión de los recursos.El objetivo de esta tesis es estudiar y evaluar las contribuciones actuales y proponer nuevas soluciones eficientes para hacer frente a los problemas de asignación de recursos, principalmente en EPON. Factores clave en este aspecto son las necesidades futuras de los usuarios finales, la calidad de servicio (QoS), el soporte para el ahorro de energíay la optimización para la provisón de servicios de tiempo real y los flujos elásticos.Esta tesis también identifica oportunidades de investigación, recomendaciones y propone nuevos mecanismos asociados con las redes de acceso basados en teconologías de fibra óptica.

    The last decades, we have witnessed different phenomenology in the telecommunications sector. One of them is the widespread use of the Internet, which has brought a sharp increase in traffic, forcing suppliers to continuously expand the capacity of networks. In the near future, Internet will be composed of long-range highspeed optical networks; a number of wireless networks at the edge; and, in between, several access technologies. Today one of the main problems of the Internet is the bottleneck in the access segment. To address this issue the Passive Optical Networks (PONs) are very likely to succeed, due to their simplicity, low-cost, and increased bandwidth. A PON is made up of fiber optic cabling and passive splitters and couplers that distribute an optical signal to connectors that terminate each fiber segment. Among the different PON technologies, the Ethernet-PON (EPON) is a great alternative to satisfy operator and user needs, due to its cost, flexibility and interoperability with other technologies. One of the most interesting challenges in such technologies relates to the scheduling and allocation of resources in the upstream (shared) channel, i.e., the resource management. The aim of this thesis is to study and evaluate current contributions and propose new efficient solutions to address the resource management issues mainly in EPON. Key issues in this context are future end-user needs, quality of service (QoS) support, energy-saving and optimized service provisioning for real-time and elastic flows. This thesis also identifies research opportunities, issue recommendations and proposes novel mechanisms associated with access networks based on optical fiber technologies.

  • La receta médica de la Actividad Física (ACTIVA-T)

     Oller Arcas, Antonio; Alcober Segura, Jesus Angel; Sallent Ribes, Sebastia
    Participation in a competitive project

     Share

  • A novel traffic-aware mechanism for energy-saving at the OLT in WDM/TDM-PON

     Garfias Hernandez, Paola; Sallent Ribes, Sebastia; Gutierrez Gonzalez, Luis Maria; de Andrade Jardin, Marilet; Tornatore, Massimo; Buttaboni, Anna
    European Conference on Network and Optical Communications and Conference on Optical Cabling and Infrastructure
    Presentation's date: 2013-07
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Even if Passive Optical Networks (PONs) have proven to be more energy-efficient that other access solutions, energy consumption minimization is becoming an important research target also in PON. In particular, to sustain the increased bandwidth demand of emerging applications in the access section of the network, new hybrid PON solutions employing WDM/TDM are being investigated. Compared with classics PON, the architecture of WDM/TDM-PONs requires more transceivers/receivers, hence they are expected to be more energy hungry than classical PONs. In this paper, we focus on the power consumption minimization in WDM/TDM-PONs and we propose an energy-efficient mechanism based on Dynamic Bandwidth and Wavelength Allocation whose objective is to switch off, whenever possible, the unnecessary receivers for upstream traffic at the Optical Line Terminal (OLT). Our proposed energy saving mechanism is able to decrease energy consumption at the OLT of about 30%, while maintaining the penalty introduced in terms of channel utilization and packet delay within an acceptable range. Detailed implementation of the proposed algorithm is presented, and simulation results are reported to quantify energy savings and effects on network performance on different network scenarios.

  • Enhanced DBA to provide QoS to coexistent EPON and 10G-EPON networks

     Garfias Hernandez, Paola; Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia
    Journal of optical communications and networking
    Date of publication: 2012
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The evolution of the Ethernet passive optical network (EPON) to the enhanced 10G-EPON standard looks poised to maintain its position as the leading fiber to the home technology worldwide. Fair bandwidth allocation will be a challenge in the near future in plants where 1G and 10G customer premises equipment coexists. In this paper we propose a distributed algorithm, distributed dynamic scheduling for EPON (DDSPON), to dynamically allocate the bandwidth requested by the user equipment with quality of service (QoS) constraints. The proposed algorithm is scalable and simple to re-configure, which facilitates a smoother transition from legacy 1G to 10G networks. By using the DDSPON, enhanced optical network units (ONUs) will take full advantage of the 10 Gb/s rate while legacy 1G ONUs maintain their service level agreement; as a result, the individual performance is maximized for both groups of ONUs. We also present an analytical model to evaluate the algorithm performance in a coexistent 1G/10G network. Finally, we also illustrate the enhancement of the DDSPON to provision the QoS to different services under the DiffServ architecture. Analysis and simulation results validate the effectiveness of the proposed mechanisms.

    The evolution of the Ethernet passive optical network (EPON) to the enhanced 10G-EPON standard looks poised to maintain its position as the leading fiber to the home technology worldwide. Fair bandwidth allocation will be a challenge in the near future in plants where 1G and 10G customer premises equipment coexists. In this paper we propose a distributed algorithm, distributed dynamic scheduling for EPON (DDSPON), to dynamically allocate the bandwidth requested by the user equipment with quality of service (QoS) constraints. The proposed algorithm is scalable and simple to re-configure, which facilitates a smoother transition from legacy 1G to 10G networks. By using the DDSPON, enhanced optical network units (ONUs) will take full advantage of the 10 Gb/s rate while legacy 1G ONUs maintain their service level agreement; as a result, the individual performance is maximized for both groups of ONUs. We also present an analytical model to evaluate the algorithm performance in a coexistent 1G/10G network. Finally, we also illustrate the enhancement of the DDSPON to provision the QoS to different services under the DiffServ architecture. Analysis and simulation results validate the effectiveness of the proposed mechanisms.

    Postprint (author’s final draft)

  • Leveraging 802.11n frame aggregation to enhance QoS and power consumption in Wi-Fi networks

     Camps Mur, Daniel; Gomony, M.D.; Pérez Costa, Xavier; Sallent Ribes, Sebastia
    Computer networks
    Date of publication: 2012-08-16
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The Wi-Fi technology, driven by its tremendous success, is expanding into a wide variety of devices and applications. However, many of these new devices, like handheld devices, pose new challenges in terms of QoS and energy efficiency. In order to address these challenges, in this paper we study how the novel MAC aggregation mechanisms developed in the 802.11n standard can be used to enhance the current 802.11 QoS and power saving protocols. Our contribution is twofold. First, we present a simulation study that illustrates the interactions between 802.11n and the current 802.11 QoS and power saving protocols. This study reveals that the 802.11n MAC aggregation mechanisms perform better when combined with the power save mode included in the original 802.11 standard than with the 802.11e U-APSD protocol. Second, we design CA-DFA, an algorithm that, using only information available at layer two, adapts the amount of 802.11n aggregation used by a Wi-Fi station according to the level of congestion in the network. A detailed performance evaluation demonstrates the benefits of CA-DFA in terms of QoS, energy efficiency and network capacity with respect to state of the art alternatives.

  • Performance analysis of AND gates based on four-wave-mixing for application in optical-code division multiple access systems

     Noshad, M.; Noshad, M.; AlaviRad, S.M.; Sallent Ribes, Sebastia
    IET Optoelectronics
    Date of publication: 2012-02
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    In this paper, we study the performance of all optical AND gates based on the four-wave-mixing (FWM) process, for application in the receivers of the spectral phase encoded optical code division multiple access (SPE-OCDMA) systems. For the performance analysis, the spectral domain auto-correlation function of the multiple access interference signal at the output of the optical AND gate is derived and then mean and variance of the photo-detector current are calculated. For solving the Fourier transform of FWM non-linear Schrodinger equations, spectral domain Volterra series are used and the solution of these coupled equations is approximated with the first three terms of the Volterra expansion. Finally, the performance of AND gating receivers in SPE-OCDMA systems is analysed and the bit error rate in terms of the pump power and the number of active users is depicted. In addition, a compression between the performance of the time-gating receivers, base on FWM in synchronous mode and other non-linear receivers such as second harmonic generation and self-phase modulation is made.

  • On centralized schedulers for 802.11e WLANs distribution versus grouping of resources allocation

     Mur, D.C.; Pérez Costa, Xavier; Marchenko, V.; Sallent Ribes, Sebastia
    Wireless communications and mobile computing
    Date of publication: 2012-09
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    Wireless LAN is becoming a pervasive wireless access technology that can be found in almost any mobile device such as laptops, PDAs, portable game consoles and mobile phones. Each of these groups of devices have a different set of requirements according to their intended use and applications but most of them share two main requirements: QoS support to satisfy applications’ demands and power saving functionality to achieve an operating time according to users’ expectations. IEEE 802.11e defines two centralized solutions in order to address these problems: Hybrid Coordination Channel Access (HCCA) for QoS and Scheduled Automatic Power Save Delivery (S-APSD) for power saving. The focus of our work in this paper is the analysis and evaluation of a proposed centralized scheduler that makes use of both aforementioned IEEE 802.11e QoS and power saving solutions. Our contributions are as follows: (i) Design and analytical modeling of a proposed centralized scheduler (DRA) that maximizes the minimum distance between the resource allocations with pseudopolynomial complexity, (ii) Extensive performance evaluation of the QoS and power saving benefits of the Distribution proposal (DRA) as compared to a generic Grouping one (GRA), and (iii) Evaluation of the complexity and scalability of the proposal to assess its feasibility in practice.

  • Contributions to QoS and Energy Efficiency in Wi-Fi networks

     Camps Mur, Daniel
    Defense's date: 2012-01-19
    Department of Telematics Engineering, Universitat Politècnica de Catalunya
    Theses

     Share Reference managers Reference managers Open in new window

  • Study of the optimum pulse-width of clock signal in optical and gates for application in ultra-fast OTDM networks

     Yazdani, A.; Sallent Ribes, Sebastia; Rincon Rivera, David; Noshad, M.
    International Conference on Transparent Optical Networks
    Presentation's date: 2012
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Real-time services in EPON

     Garfias Hernandez, Paola; Sallent Ribes, Sebastia; Gutierrez Gonzalez, Luis Maria; Camps Mur, Daniel
    Optical Fiber Communication Conference and Exposition and National Fiber Optic Engineers Conference
    Presentation's date: 2012-03-08
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    This paper proposes an improved scheduling algorithm that optimizes the allocation of the real-time services and elastic flows in EPON by spreading the real-time service periods lowering the delay and thus fulfilling the QoS requirements.

    Postprint (author’s final draft)

  • Evaluating Strategies for Evolution of Passive Optical Networks

     De Andrade Jardin, Marilet; Kramer, Glen; Wosinska, Lena; Chen, Jiajia; Sallent Ribes, Sebastia; Mukherjee, Biswanat
    IEEE communications magazine
    Date of publication: 2011-07
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Designing energy efficient access points with Wi-Fi Direct

     Camps Mur, Daniel; Pérez Costa, Xavier; Sallent Ribes, Sebastia
    Computer networks
    Date of publication: 2011-09-15
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Future Internet testbeds/experimentation between BRazil and Europe - EU

     Sallent Ribes, Sebastia
    Participation in a competitive project

     Share

  • La receta médica de la Actividad Física (ACTIVA-T)

     Oller Arcas, Antonio; Alcober Segura, Jesus Angel; Sallent Ribes, Sebastia
    Participation in a competitive project

     Share

  • Hybrid Optical Wireless ARchitecture for Delay/Disruption Tolerant Services

     Cervelló Pastor, Cristina; Sallent Ribes, Sebastia; Remondo Bueno, David; Guasch Murillo, Daniel; Gutierrez Gonzalez, Luis Maria; Agusti Torra, Anna; Rincon Rivera, David; Raspall Chaure, Federico; Triay Marques, Joan; GARFIAS HERNÁDEZ, Paola
    Participation in a competitive project

     Share

  • Arquitectura híbrida óptica-inalámbrica para servicios tolerantes a retardos e interrupciones - UPC

     Agusti Torra, Anna; Cervelló Pastor, Cristina; García García, Aurelio J.; Remondo Bueno, David; Triay Marques, Joan; Guasch Murillo, Daniel; Gutierrez Gonzalez, Luis Maria; Jiménez Agudelo, Yury; Raspall Chaure, Federico; Rincon Rivera, David; Sallent Ribes, Sebastia
    Participation in a competitive project

     Share

  • Flexible joint scheduling DBA to promote the fair coexistence in 1G and 10G EPONs

     Gutierrez Gonzalez, Luis Maria; Garfias Hernandez, Paola; Sallent Ribes, Sebastia
    International Conference on Optical Networking Design and Modeling
    Presentation's date: 2011-02-08
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The Next Generation Access Networks (NGAN) are the new step forward to deliver broadband services and to facilitate the integration of different technologies. The real challenge faced by 10GEPON new standard IEEE 803.3av is to upgrade the channel capacity for both upstream and downstream channels gracefully, while maintaining the logical layer intact ensuring the coexistence with legacy 1 Gb/s (IEEE 802.3ah). The Dynamic Bandwidth Allocation (DBA) for the upstream shared channel is a key issue. We propose in this paper a distributed DBA-Distributed Dynamic Scheduling for EPON, (DDSPON)-that allows the coexistence among both standards in such mixed architecture. In particular, we remark that, by using the enhanced DDSPON, the new standardized optical network units (ONUs) will take full advantage of the enhanced rate at 10 Gb/s while the legacy 1 Gb/s ONUs keep a good performance, and thus allowing a fair coexistence of both groups of ONUs-legacy and 10 Gb/s-, and even though the individual performance is maximized, no matter the group being evaluated. We compare DDSPON with another well-known scheduling algorithm and we show that it performs better specially when the traffic is bursty. Furthermore, the proposed algorithm is scalable, simple to re-configure, and cost-effective, which facilitates a smoother transition from 1G to 10G EPON.

  • Access to the full text
    Optimizing the migration to future-generation passive optical networks (PON)  Open access

     de Andrade Jardin, Marilet; Tornatore, Massimo; Sallent Ribes, Sebastia; Mukherjee, Biswanat
    IEEE systems journal
    Date of publication: 2010-12
    Journal article

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    We study the upgrading problem of existing Passive Optical Networks (PONs) that need to increase their capacity at different points in time. Our method upgrades line rates and migrates network services over new wavelength channels based on increasing traffic demand and cost constraints. Our method minimizes capital expenses and system disruptions, while ensuring effective resource usage. Our multistep model uses Mixed Integer Linear Program (MILP) formulations whose cost parameters are set by a pricing policy. We evaluate the PON upgrade through installation of single-wavelength transceivers or multiple-wavelength arrays of transceivers. We consider a typical case study, which is solved using CPLEX. Illustrative examples demonstrate the attractive properties of our method.

  • Access to the full text
    Next Generation Optical Access Networks: from TDM to WDM  Open access

     Gutierrez Gonzalez, Luis Maria; Garfias Hernandez, Paola; de Andrade Jardin, Marilet; Cervelló Pastor, Cristina; Sallent Ribes, Sebastia
    Date of publication: 2010-03
    Book chapter

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Postprint (author’s final draft)

  • Arquitectura de red y algoritmos para el diseño de la internet de futuro

     Agusti Torra, Anna; Cervelló Pastor, Cristina; De Andrade Jardin, Marilet; Guasch Murillo, Daniel; Gutierrez Gonzalez, Luis Maria; Raspall Chaure, Federico; Rincon Rivera, David; Sallent Ribes, Sebastia; Triay Marques, Joan
    Participation in a competitive project

     Share

  • AJUT ICREA ACADEMIA 2010

     Junyent Giralt, Gabriel; Mataix Oltra, Jorge; Sallent Ribes, Sebastia; Alcober Segura, Jesus Angel; Rincon Rivera, David; Cervelló Pastor, Cristina; Paradells Aspas, Jose; Garcia Ojalvo, Jorge
    Participation in a competitive project

     Share

  • Resource Optimization in Passive Optical Networks: Dynamic Bandwidth Allocation, Evolution, and Cost-Effective Capacity Upgrades  Open access

     DE ANDRADE JARDIN, MARILET
    Defense's date: 2010-11-23
    Department of Telematics Engineering, Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    This thesis is a result of contributions to optimize or improve resource allocation in Passive Optical Networks (PON). The contributions are related with resource allocation during PON operation and with the upgrade process to allocate more capacity to the network in an "as-needed" fashion. We first address algorithms for Dynamic Bandwidth Allocation (DBA) in the upstream channel of Ethernet-based PONs through providing a state-of-the-art survey and proposing two algorithms. The proposed DBA results demonstrate improved performance and fairness among users. Then we introduce the problem of allocating new capacity to an existing PON through addition of wavelength (channels) and line-rate upgrades. In this regard, we first analyze possible strategies for PON evolution, and then we provide a new cost-based method to optimize the upgrade process in a per-period basis. The results on PON evolution analysis and our capacity-upgrade method contribute to cost reductions while optimizing new channel allocation, maximizing network capacity usage, and assuring minimum disturbances.Esta tesis es el resultado de contribuciones para optimizar o mejorar la distribución de recursos en Redes Ópticas Pasivas (PONs). Las contribuciones están relacionadas con el uso de los recursos durante la operación de las PONs y con el proceso de incremento en la capacidad en la red de forma gradual. Primero enfocamos el estudio en algoritmos de Distribución Dinámica de Ancho de Banda (DBA, por las siglas en inglés) sobre el canal ascendente de las redes PON basadas en Ethernet, para lo cual proveemos un resumen del estado del arte y proponemos dos nuevos algoritmos. Los resultados de evaluar los DBA propuestos demuestran mejoras en el rendimiento y mayor justicia entre los usuarios. Posteriormente se introduce el problema de asignar más capacidad a una PON existente mediante la implementación de nuevas longitudes de onda (canales) y aumento de la tasa de línea. Finalmente se plantea un método que minimiza las inversiones en el proceso de migración de las redes PON. Los resultados en el análisis de la evolución de las PONs y nuestro método basado en costos para incrementar la capacidad, contribuyen a reducir la inversión a la vez que se optimiza la implementación y asignación de nuevos canales, maximizando el uso de la capacidad de la red, y asegurando mínimos cortes de servicios.

  • An adaptive solution for Wireless LAN distributed power saving modes

     Camps Mur, Daniel; Pérez-Costa, Xavier; Sallent Ribes, Sebastia
    Computer networks
    Date of publication: 2009-12
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The current trend to incorporate the Wireless LAN technology in increasingly smaller mobile devices poses new challenges, in terms of QoS and power consumption requirements, for the design of such devices. IEEE 802.11 and 802.11e define mechanisms to address these challenges but do not provide any guidance about how to design the algorithms required to make use of them to achieve an optimum performance. The work presented in this paper focuses on the design of an adaptive algorithm for the distributed power saving mechanisms of Wireless LANs when facing the challenge of providing QoS to devices in a power save mode. Our main contributions are (i) an analytical model that captures the dependencies between the QoS experienced and the configuration of the Wireless LAN distributed power saving mechanisms, (ii) a generic algorithm based on the steepest descent method that, using only information available in the MAC layer, adapts to the applications’ characteristics and configures a power saving mechanism in order to provide a satisfactory QoS experience, (iii) an analysis of the convergence properties of the proposed algorithm that provides the optimum values of its configurable parameters, and (iv) a thorough simulative study that demonstrates the suitability of our adaptive solution in todays typical Wi-Fi deployments and its advantages in front of existent solutions in the state of the art.

  • SIP: Advanced Media Integration

     Alcober Segura, Jesus Angel; Hurtado, M; Rios, A; Oller, A; Sallent Ribes, Sebastia
    Date of publication: 2009-03
    Book chapter

     Share Reference managers Reference managers Open in new window

  • XARXES I SERVEIS DE BANDA AMPLA

     Guasch Murillo, Daniel; Domingo Aladren, Maria Del Carmen; Agusti Torra, Anna; Remondo Bueno, David; Raspall Chaure, Federico; Cervelló Pastor, Cristina; Barba Marti, Antonio; Hesselbach Serra, Xavier; Alcober Segura, Jesus Angel; Mataix Oltra, Jorge; Rincon Rivera, David; Triay Marques, Joan; Oller Arcas, Antonio; Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia
    Participation in a competitive project

     Share

  • Access to the full text
    Distributed Resources Assignment for Optical Burst Switching without Wavelength Conversion (Invited Paper)  Open access

     Cervelló Pastor, Cristina; Triay Marques, Joan; Sallent Ribes, Sebastia
    Nineth IEEE / CreateNet International Workshop on Optical Burst/Packet Switching (WOBS'09) held in conjunction with Sixth International Conference on Broadband Networks (BROADNETS 2009)
    Presentation's date: 2009-09-14
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The amount of bursty Internet traffic leads to develop new architectures and technologies, such as Optical Burst Switching (OBS), to efficiently satisfy future bandwidth requirements. Burst loss probability is an important quality of service metric for OBS due to its bufferless characteristic, even more critical without wavelengths converters. So, resource assignment is an important issue to solve in OBS networks. In this paper, two distributed resources assignment schemes without wavelength conversion capability are proposed. Whereas the first one is applied at the edge nodes to achieve a loss-free core network, the second is an enhanced routing and wavelength assignment scheme applied at core nodes. Simulation results indicate that the first scheme offers a loss-free solution with blocking probability only at ingress nodes and high traffic load. The second one reduces the network-wide burst loss probability significantly compared with other schemes.

  • Access to the full text
    New trends on Optical Access Networks: DBAs for 10G EPON and Long-Reach PON  Open access

     Gutierrez Gonzalez, Luis Maria; de Andrade Jardin, Marilet; Sallent Ribes, Sebastia
    European Conference on Networks and Optical Communications
    Presentation's date: 2009-06-10
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The access network infrastructure plays an important role in the overall performance of the network, next generation access networks (NGA) must be able to access diverse services, and should incorporate adequate architectures that include mechanisms for the integration of different technologies. New optical access technologies trends are: WDM, 10 Gb/s, and longer reach/higher splits. It is also important to take into account the evolution of the installed legacy PONs to the next generation optical access networks. The present paper goes through such topics, focusing on the research being carried out to develop dynamic bandwidth algorithms for the 10 Gb/s new EPON standard (IEEE 802.3av). We summarize results and point out issues that will require further investigation.

  • Integration of Optical and Wireless Technologies in the Metro-Access: QoS Support and Mobility Aspects

     Remondo Bueno, David; Nunes, Mario; Sargento, Susana; Cesana, Matteo; Filippini, Ilario; Triay Marques, Joan; Agusti Torra, Anna; de Andrade Jardin, Marilet; Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia; Cervelló Pastor, Cristina
    Conference on Next Generation Internet Design and Engineering
    Presentation's date: 2009-07-03
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Towards Scalable Traffic Measurements in High-Speed Networks.

     Raspall Chaure, Federico
    Defense's date: 2009-07-15
    Department of Telematics Engineering, Universitat Politècnica de Catalunya
    Theses

     Share Reference managers Reference managers Open in new window

  • Access to the full text
    Algoritmo distribuido para la asignación dinámica de recursos en redes EPON  Open access

     de Andrade Jardin, Marilet; Garfias Hernandez, Paola; Sallent Ribes, Sebastia; Gutierrez Gonzalez, Luis Maria; Martinez Manzanilla, Anny Gabriela; Vizarreta Paz, Pedro Pablo; Sánchez, Dayana; Huerta, Mónica
    Jornadas de Ingeniería Telemática1
    Presentation's date: 2009-09
    Presentation of work at congresses

    Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

  • Access to the full text
    Media Layer: redesigning the Internet as the media network of the future  Open access

     Miguelez Ortiz, Xavier; Iglesias, F J; Lorente, P; Alcober Segura, Jesus Angel; Serra Hurtado, Arturo; Sallent Ribes, Sebastia
    Date: 2008-05
    Report

    Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

  • SIP: Advanced Media Integration

     Oller Arcas, Antonio; Alcober Segura, Jesus Angel; Sallent Ribes, Sebastia; Hurtado, M; Rios, A
    Date of publication: 2008-12
    Book chapter

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Tools for the design and analysis of optical and wired access networks

     Triay Marques, Joan; Cervelló Pastor, Cristina; de Andrade Jardin, Marilet; Sallent Ribes, Sebastia
    Date: 2008-04
    Report

     Share Reference managers Reference managers Open in new window

  • EURO-NF: Anticipating the Network of the Future - From Theory to Design (European Union 16366, FP7-ICT-2007-1)

     Remondo Bueno, David; Sallent Ribes, Sebastia; Hesselbach Serra, Xavier; Cervelló Pastor, Cristina; Rincon Rivera, David; Agusti Torra, Anna; Gutierrez Gonzalez, Luis Maria; Barba Marti, Antonio; Domingo Aladren, Maria Del Carmen
    Participation in a competitive project

     Share

  • Multiqueue model approach to evaluate the performance of an EPON access network

     Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia; de Andrade Jardin, Marilet; Hesselbach Serra, Xavier
    15th International Conference on Telecommunications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • FI-WI (FIbre-WIreless Access: Future Integrated Access Architecture Based on Optical and Broadband Wireless Technologies)

     Remondo Bueno, David; Agusti Torra, Anna; Cervelló Pastor, Cristina; Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia; Triay Marques, Joan; De Andrade Jardin, Marilet; Garfias Hernandez, Paola
    Participation in a competitive project

     Share

  • Media Layer: redesigning the Internet as the media network of the future

     Alcober Segura, Jesus Angel; Iglesias, F J; Lorente, P; Miguelez Ortiz, Xavier; Sallent Ribes, Sebastia; Serra Hurtado, Arturo
    1st Workshop New Trends in Service & Networking architectures
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Multiqueue model approach to evaluate the performance of an EPON access network

     Gutiérrez González, Ernesto; Sallent Ribes, Sebastia; de Andrade Jardin, Marilet; Hesselbach Serra, Xavier
    2008 International Conference on Telecommunications - ICT 2008
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Access to the full text
    La Internet del Futur: Anàlisi retrospectiva, reflexió i posicionament estratègic  Open access

     Alcober Segura, Jesus Angel; Cervelló Pastor, Cristina; Domingo Pascual, Jordi; Fernandez, Gabriel; Junyent Giralt, Gabriel; Oliver, Miquel; Paradells Aspas, Jose; Sallent Ribes, Sebastia; Serra Hurtado, Arturo
    Date: 2008-07
    Report

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Aquest treball té com a objectiu analitzar la situació actual de la Internet, per proposar noves alternatives i dibuixar un possible camí cap a la Internet del Futur. Aquesta anàlisi vol ser un punt de partida, un document de reflexió, que posicioni als agents locals i nacionals (entorns de la recerca, innovació i producció, i usuaris) en una situació capdavantera en la construcció del nou model econòmic i social del segle XXI. El treball consta de dos grans apartats, una introducció descriptiva i conceptual del paper que juga la Internet i la seva projecció futura, i una segona part on es desdibuixen en mes profunditat les bases tecnològiques de la possible Internet del futur a partir de la realitat actual.

  • Adaptive Shared-State Sampling

     Raspall Chaure, Federico; Sallent Ribes, Sebastia
    Internet Measurement Conference
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Scaling Properties of Network Traffic

     Rincon Rivera, David; Sallent Ribes, Sebastia
    Date of publication: 2007-08
    Book chapter

     Share Reference managers Reference managers Open in new window

  • DDSPON: A Distributed Dynamic Scheduling for EPON

     de Andrade Jardin, Marilet; Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia
    IEEE International Conference on Signal Processing and Communications
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • A Distributed Scheduling Approach for Ethernet-based Passive Optical Networks

     de Andrade Jardin, Marilet; Gutierrez Gonzalez, Luis Maria; Sallent Ribes, Sebastia
    32nd IEEE Conference on Local Computer Networks
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Issues in TCP Vegas over Optical Burst Switching Networks

     León Abarca, Olga; Sallent Ribes, Sebastia
    The 32nd Annual IEEE Conference on Local Computer Networks
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Contributions to the wavelet-based characterization of network traffic

     Rincon Rivera, David
    Defense's date: 2007-09-25
    Department of Telematics Engineering, Universitat Politècnica de Catalunya
    Theses

     Share Reference managers Reference managers Open in new window

  • Detección y medida en tiempo real de flujos de elementos frecuentes en grandes poblaciones, escalabla y sintonizable.

     Raspall Chaure, Federico; Yufera Gomez, Jose Manuel; Sallent Ribes, Sebastia
    Date of request: 2007-01-25
    Invention patent

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Detección y medida en tiempo real de flujos de elementos frecuentes en grandes poblaciones, escalable y sintonizable.

    Un "método" para la detección y medida de elementos frecuentes (que aparecen más veces que un determinado umbral en una población de elementos potencialmente muy grande, como pueden ser "registros" en una base de datos, o "paquetes" en redes de conmutación de paquetes. El método combina muestreo y el uso de funciones resumen (hash). Permite la detección de elementos frecuentes con alta probabilidad, en tiempo real, con tiempo de proceso reducido y determinista y con bajos requerimientos de memoria. En particular, requiere un número de contadores inferior e independiente al número de elementos distintos presentes en la población. Estas características permiten su aplicación en entornos de bases de datos y en redes de alta velocidad donde es interesante detectar y medir grandes flujos de tráfico en tiempo real.

  • EURO-FGI:Design and Engineering of the Future Generation Internet - Towards convergent multi-service networks

     Sallent Ribes, Sebastia; Hesselbach Serra, Xavier; Agusti Torra, Anna; Gutierrez Gonzalez, Luis Maria; Cervelló Pastor, Cristina; Domingo Aladren, Maria Del Carmen; Remondo Bueno, David; Rincon Rivera, David; Barba Marti, Antonio
    Participation in a competitive project

     Share

  • Segmenting LRD Traffic with Wavelets and the Schwarz Information Criterion

     Rincon Rivera, David; Minerva, F; Sallent Ribes, Sebastia
    PAM Passive and Active Measurement conference
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window