Now showing items 21-40 of 43

  • Greener networking in a network virtualization environment 

    Botero Vega, Juan Felipe; Hesselbach Serra, Xavier (2013-06-19)
    Article
    Restricted access - publisher's policy
    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 ...
  • Innovative techniques for power consumption saving in telecommunication networks 

    Hesselbach Serra, Xavier; Eramo, Vicenzo; Luo, Yan (2014-05-05)
    Article
    Open Access
  • Innovative techniques for power consumption saving in telecommunication networks 

    Eramo, Vicenzo; Hesselbach Serra, Xavier; Luo, Yan (HINDAWI, 2014-05-05)
    Article
    Open Access
  • Inteligencia de red 

    Barba Martí, Antonio; Hesselbach Serra, Xavier (Edicions UPC, 2002)
    Book
    Restricted access to the UPC academic community
    Actualmente existe una necesidad cada vez mayor de ofrecer servicios de red avanzados, que proporcionen un alto valor añadido al cliente. Eso es ya posible gracias a las nuevas capacidades de computación añadidas a los ...
  • 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
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Open Access
    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 ...
  • Multi constraint network virtualization strategy based on Paths Algebra for non-linear parameters 

    Hesselbach Serra, Xavier; Amazonas, Jose Roberto; Gutiérrez Anato, Alejandro (Universitat de les Illes Balears, 2015)
    Conference report
    Restricted access - publisher's policy
    One of the main challenges in network virtualization is the virtual network embedding problem (VNE). The objective of the VNE is to map a set of Virtual Network Requests (VNR) to physical nodes and links. VNR is composed ...
  • Nano-networks communication architecture: Modeling and functions 

    Galal, Akram; Hesselbach Serra, Xavier (2018-09-01)
    Article
    Open Access
    Nano-network is a communication network at the Nano-scale between Nano-devices. Nano-devices face certain challenges in functionalities, because of limitations in their processing capabilities and power management. Hence, ...
  • Network function virtualization aware offline embedding problem using squatting-kicking strategy for elastic optical networks 

    Hamouda, Ahmed Mohamed Abdelaty Elmekkawi; Hesselbach Serra, Xavier; Piney da Silva, José Ramón (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Network Function Virtualization (NFV) has recently become one of the most attractive technologies in telecommunication industry due to its ability to realize Network Services (NSs) on general-purpose hardware hence replacing ...
  • Online power aware coordinated virtual network embedding with 5G delay constraint 

    Hejja, Khaled; Hesselbach Serra, Xavier (2018-12-15)
    Article
    Open Access
    Solving virtual network embedding problem with delay constraint is a key challenge to realize network virtualization for current and future 5G core networks. It is an NP-Hard problem, composed of two sub-problems, one for ...
  • On the complex scheduling formulation of virtual network functions over optical networks 

    Ferrer Riera, Jordi; Hesselbach Serra, Xavier; Escalona Zorita, Eduard; García Espin, Joan Antoni; Grasa, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Software-Defined Networking and Network Functions Virtualisation has brought a revolution within the telecom market landscape. Initial proof-of-concept prototypes for NFV-enabled solutions are being developed at the same ...
  • Optimal mapping of virtual networks with hidden hops 

    Botero Vega, Juan Felipe; Hesselbach Serra, Xavier; Fischer, Andreas; de Meer, Hermann (2012-12-01)
    Article
    Open Access
    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)
    Conference report
    Open Access
    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 ...
  • Planning of dynamic virtual optical cloud infrastructures: the GEYSERS approach 

    Tzanakaki, Anna; Anastasopoulos, Markos; Landi, Giada; Bernini, Giacomo; Ciulli, Nicola; Riera, Jordi; Escalona Zorita, Eduard; García Espin, Joan Antoni; Hesselbach Serra, Xavier; Figuerola Fernández, Sergi; Peng, Shuping; Nejabati, Reza; Simeonidou, Dimitra; Parniewicz, Damian; Belter, Bartosz (2014-01-01)
    Article
    Restricted access - publisher's policy
    This article focuses on planning and replanning of virtual infrastructures over optical cloud infrastructures comprising integrated optical network and IT resources. This concept has been developed in the context of the ...
  • Problems in dynamic bandwidth allocation in connection oriented networks 

    Hesselbach Serra, Xavier (Springer, 2009)
    Part of book or chapter of book
    Restricted access - publisher's policy
  • Routing with prioritization based on statistics in OBS networks 

    Escolar Díaz, Mariana; Hesselbach Serra, Xavier (2009)
    Conference report
    Open Access
    This paper introduces a new strategy to provide QoS in IP/OBS networks, using Routing with Prioritization Based on Statistics (RPBS). This proposal uses the feedback scheme in optical networks to provide statistical knowledge ...
  • Squat-based resource management strategy for enabling shared infrastructures over optical networks 

    García-Espín, Joan Antoni; Hesselbach Serra, Xavier (Marian Marciniak, IEEE, 2010)
    Conference report
    Open Access
    This paper proposes a new paradigm and strategy for resource management in optical networks considering that resources allocated to a user or service can be squatted in by third parties temporarily in order to provide ...
  • Strategy for IP traffic support with QoS in OBS networks 

    Hesselbach Serra, Xavier; Huerta, Mónica; Rodolfo, Alvizu (Marian Marciniak, 2008)
    Conference report
    Open Access
    This paper presents a new strategy for burst reservation in OBS networks for the transport of IP/DiffServ traffics with Quality of Service (QoS) constraints using MPLS. The current resource reservation protocols research ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 ...