Ara es mostren els items 1-20 de 21

    • A data center control architecture for power consumption reduction 

      Botero Vega, Juan Felipe; Rincón Rivera, David; Agustí Torra, Anna; Hesselbach Serra, Xavier; Raspall Chaure, Frederic; Remondo Bueno, David; Barba Martí, Antonio; Barone, Paolo; Giuliani, Giovanni (2013)
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      In recent years, the emergence of the cloud computing has increased the need of resources to support cloud-based services. Therefore, the role of the data centers has become essential. Following the growing of services, ...
    • A distributed, parallel, and generic virtual network embedding framework 

      Beck, Michael Till; Fischer, Andreas; de Meer, Hermann; Botero Vega, Juan Felipe; Hesselbach Serra, Xavier (2013)
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      One of the main challenges of network virtualization is the mapping of virtual network demands to physical network resources, commonly known as the virtual network embedding (VNE) problem. This paper introduces DPVNE, a ...
    • A generic architecture for Demand Response: the All4Green approach 

      Basmadjian, Robert; Lovasz, Gergö; Beck, Michael Till; de Meer, Hermann; Hesselbach Serra, Xavier; Botero Vega, Juan Felipe; Klingert, Sonja; Pérez Ortega, María; López, Juan Carlos; Stam, Andries; van Krevelen, Rick; di Girolamo, marco (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      Demand Response is a mechanism used in power grids to manage customers’ power consumption during critical situations (e.g. power shortage). Data centres are good candidates to participate in Demand Response programs due ...
    • A novel path computing framework under QoX constraints based on N&PV functions embedding 

      Hesselbach Serra, Xavier; Botero Vega, Juan Felipe; Amazonas, Jose Roberto (2015)
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      Network function virtualization (NFV) and software-defined networking (SDN) represent new paradigms in networking. In this paper, we extend the concept of NFV to include the functions associated to the physical objects of ...
    • A novel paths algebra-based strategy to flexibly solve the link mapping stage of VNE problems 

      Botero Vega, Juan Felipe; Molina, Miguel; Hesselbach Serra, Xavier; Almeida Amazonas, José Roberto de (2013-11)
      Article
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      One of the main challenges of network virtualization is the virtual network embedding problem (VNE) that consists of mapping virtual network demands in physical network resources. VNE can be decomposed into two stages: ...
    • ALEVIN - A framework to develop, compare, and analyze virtual network embedding algorithms 

      Fischer, Andreas; Botero Vega, Juan Felipe; Duelli, Michael; Schlosser, Daniel; Hesselbach Serra, Xavier; de Meer, Hermann (2011)
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      Network virtualization is recognized as an enabling technology for the Future Internet. Applying virtualization of network resources leads to the problem of mapping virtual resources to physical resources, known as “Virtual ...
    • Comparacion de algoritmos para el mapeo de redes virtuales 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier (2011)
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      La virtualizacion de red es reconocida como una de las principales tecnologías que formara parte del Internet del futuro. Mediante ella, la actual inhabilidad de Internet para desarrollar e implementar nuevos servicios, ...
    • Design of high throughput and cost-efficient data center networks supporting NFV 

      Eramo, Vicenzo; Hesselbach Serra, Xavier; Luo, Yan; Botero Vega, Juan Felipe (HINDAWI, 2016-04-20)
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      Data centers (DC) are characterized by the sharing of compute and storage resources to support Internet services. Today, many companies (Amazon, Google, Facebook, etc.) use data centers to offer storage, web search, and ...
    • Energy efficient virtual network embedding 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier; Duelli, Michael; Schlosser, Daniel; Fischer, A.; de Meer, Hermann (2012-05)
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      Waste of energy due to over-provisioning and overdimensioning of network infrastructures has recently stimulated the interest on energy consumption reduction by Internet Service Providers (ISPs). By means of resource ...
    • Flexible VNE algorithms analysis using ALEVIN 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier; Duelli, Michael; Schlosser, Daniel; Fischer, A.; de Meer, Hermann (2011)
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      Network virtualization is recognized as an enabling technology for the Future Internet that overcomes network ossification. However, it introduces a set of challenges. In any network virtualization environment, the problem ...
    • Generalized Cognitive Networks of Virtual Resources 

      Manzalini, A; Moiso, Corrado; Minerva, R.; Hesselbach Serra, Xavier; Solé Pareta, Josep; Botero Vega, Juan Felipe (2010)
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      The pervasive distribution of digital devices (e.g., laptops, mobile phone, digital camera, music players, RFID, sensors, smart cards) will create a large distributed computational and networking environment that will ...
    • Greener networking in a network virtualization environment 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier (2013-06-19)
      Article
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      Energy consumption of network operators can be minimized by the dynamic and smart relocation of networking resources. In this paper, we propose to take advantage of network virtualization to enable a smart energy aware ...
    • Making data centres fit for demand response: introducing GreenSDA and GreenSLA contracts 

      Basmadjian, Robert; Botero Vega, Juan Felipe; Giuliani, Giovanni; Hesselbach Serra, Xavier; Klingert, Sonja; de Meer, Hermann (2016-11-23)
      Article
      Accés obert
      The power grid has become a critical infrastructure, which modern society cannot do without. It has always been a challenge to keep power supply and demand in balance; the more so with the recent rise of intermittent ...
    • Management of resources under priorities in EON using a modified RDM based on the squatting-kicking approach 

      Hesselbach Serra, Xavier; Dantas, Joana; Amazonas, José Roberto de Almeida; Botero Vega, Juan Felipe; Piney da Silva, José Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      The paper proposes a resources allocation method for EON based on a modified RDM using squatting and kicking strategies in order to prioritise the usage of channels and enhancing the total utilisation. It can also be used ...
    • MANTICORE II: IP Network as a Service Pilots at HEAnet, NORDUnet and RedIRIS 

      Cabello, Isidro; Simeonidou, Dimitra; Lonvich, Chris; Uze, Jean Marc; de Miguel, Tomas P.; Fischer, Lars; Wilson, Dave; Reijs, Victor; Grasa Gras, Eduard; Figuerola, Sergi; Barrera, Xavier; Ferrao, Laia; Baez, Carlos; Minoves, Pau; Hesselbach Serra, Xavier; Botero Vega, Juan Felipe (2010)
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      MANTICORE II follows the Infrastructure as a Service (IaaS) paradigm to enable National Research and Education Networks (NRENs) and other e-infrastructure providers to enhance their service portfolio by building and piloting ...
    • Optimal mapping of virtual networks with hidden hops 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier; Fischer, Andreas; de Meer, Hermann (2012-12-01)
      Article
      Accés obert
      Network virtualization has emerged as a solution for the Internet inability to address the required challenges caused by the lack of coordination among Internet service providers for the deployment of new services. The ...
    • Optimization model for bandwidth allocation in a network virtualization environment 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier (2009)
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      Bandwidth allocation is one of the main problems in network virtualization. Mechanisms to allocate bandwidth may avoid bottlenecked virtual links. This paper proposes a model based on optimization theory, to distribute the ...
    • Study, evaluation and contributions to new algorithms for the embedding problem in a network virtualization environment 

      Botero Vega, Juan Felipe (Universitat Politècnica de Catalunya, 2013-06-21)
      Tesi
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      Network virtualization is recognized as an enabling technology for the future Internet. It aims to overcome the resistance of the current Internet to architectural change and to enable a new business model decoupling the ...
    • The Bottlenecked Virtual Network Problem in Bandwidth Allocation for Network Virtualization 

      Botero Vega, Juan Felipe; Hesselbach Serra, Xavier (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
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      Internet is becoming unable to overcome the challenges required by new services due to the lack of coordination among Internet service providers. This situation, frequently called network ossification, makes increasingly ...
    • Virtual network embedding: a survey 

      Fischer, Andreas; Botero Vega, Juan Felipe; Beck, Michael Till; de Meer, Hermann; Hesselbach Serra, Xavier (IEEE Computer Society Publications, 2013-10)
      Article
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      Network virtualization is recognized as an enabling technology for the future Internet. It aims to overcome the resistance of the current Internet to architectural change. Application of this technology relies on algorithms ...