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Suche nach „[X.] [Hesselbach]“ hat 7 Publikationen gefunden
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    DigitalElektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    M. Duelli, D. Schlosser, J. Botero, X. Hesselbach, Andreas Fischer, H. Meer

    VNREAL: Virtual Network Resource Embedding Algorithms in the Framework ALEVIN

    Proceedings of the 7th Euro-NF Conference on Next-Generation Internet (NGI 2011) [Kaiserslautern; June 27-29, 2011]

    DOI: 10.1109/NGI.2011.5985874

    Abstract anzeigen

    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 of optimally mapping virtual resources to physical resources, known as virtual network embedding (VNE), is a critical challenge. Several algorithms attempting to solve this problem have been proposed in literature, so far. However, comparison of existing and new VNE algorithms is hard, as each algorithm focuses on different criteria. To that end, the VNREAL project introduces ALEVIN, a framework to compare different algorithms according to a set of metrics, easily incorporate new VNE algorithms, and evaluate these algorithms on a given scenario for arbitrary parameters.

    DigitalElektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    J. Botero, X. Hesselbach, M. Duelli, D. Schlosser, Andreas Fischer, H. Meer

    Flexible VNE Algorithms Analysis using ALEVIN

    Proceedings of the 11th Würzburg Workshop on IP: Joint ITG and Euro-NF Workshop "Visions of Future Generation Networks" (EuroView2011)

    Abstract anzeigen

    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 of optimally mapping virtual demands to physical resources, known as virtual network embedding (VNE), is a crucial challenge. This paper analyses the behaviour of the main algorithms proposed to solve VNE by means of the ALEVIN framework. The VNE algorithms are evaluated with regard to appropriate metrics such as: cost, revenue, and virtual network acceptance ratio. We also analyse the impact of the recently introduced hidden hop demand concept in the performance of the VNE algorithms.

    DigitalElektrotechnik und Medientechnik

    Beitrag (Sammelband oder Tagungsband)

    M. Beck, Andreas Fischer, H. Meer, J. Botero, X. Hesselbach

    A distributed, parallel, and generic virtual network embedding framework

    IEEE International Conference on Communications (ICC 2013) [Budapest, Hungary; June 9-13, 2013]

    DOI: 10.1109/ICC.2013.6655087

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    Andreas Fischer, J. Botero, M. Duelli, D. Schlosser, X. Hesselbach, H. Meer, T. Margaria, J. Padberg, G. Taentzer, H. Hellbrück, N. Luttenberger, V. Turau

    ALEVIN - A Framework to Develop, Compare, and Analyze Virtual Network Embedding Algorithms

    Electronic Communications of the EASST, vol. 37, pp. 1-12

    Abstract anzeigen

    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 Network Embedding” (VNE). Several algorithms attempting to solve this problem have been discussed in the literature, so far. However, comparison of VNE algorithms is hard, as each algorithm focuses on different criteria. To that end, we introduce a framework to compare different algorithms according to a set of metrics, which allow to evaluate the algorithms and compute their results on a given scenario for arbitrary parameters.

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    Andreas Fischer, J. Botero, Michael Beck, H. Meer, X. Hesselbach

    Virtual Network Embedding: A Survey

    IEEE Communications Surveys and Tutorials, vol. 15, no. 4, pp. 1888-1906

    DOI: 10.1109/SURV.2013.013013.00155

    Abstract anzeigen

    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 that can instantiate virtualized networks on a substrate infrastructure, optimizing the layout for service-relevant metrics. This class of algorithms is commonly known as “Virtual Network Embedding (VNE)” algorithms. This paper presents a survey of current research in the VNE area. Based upon a novel classification scheme for VNE algorithms a taxonomy of current approaches to the VNE problem is provided and opportunities for further research are discussed.

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    J. Botero, X. Hesselbach, Andreas Fischer, H. Meer

    Optimal mapping of virtual networks with hidden hops

    Telecommunications Systems: Special Issue on Future Internet Services and Architectures (Trends and Visions), vol. 51, no. 4, pp. 273-282

    DOI: 10.1007/s11235-011-9437-0

    Abstract anzeigen

    Network Virtualization has emerged as a so-lution for the Internet inability to address the requiredchallenges caused by the lack of coordination amongInternet service providers for the deployment of newservices. The allocation of resources is one of the mainproblems in network virtualization, mainly in the map-ping of virtual nodes and links to specific substratenodes and paths, also known as the virtual networkembedding problem. This paper proposes an algorithmbased on optimization theory, to map the virtual linksand nodes requiring a specific demand, looking for themaximization of the spare bandwidth and spare CPUin the substrate network, taking into account the band-width demanded by thehidden hopswhen a virtuallink is mapped. The components of the virtual networks(nodes and links) that do not ask for an specific demandare then allocated following a fairness criteria.

    DigitalElektrotechnik und Medientechnik

    Zeitschriftenartikel

    J. Botero, X. Hesselbach, M. Duelli, D. Schlosser, Andreas Fischer, H. Meer

    Energy Efficient Virtual Network Embedding

    IEEE Communications Letters, vol. 16, no. 5, pp. 756-759

    DOI: 10.1109/LCOMM.2012.030912.120082

    Abstract anzeigen

    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 consolidation, network virtualization based architectures will enable energy saving. In this letter, we extend the well-known virtual network embedding problem (VNE) to energy awareness and propose a mixed integer program (MIP) which provides optimal energy efficient embeddings. Simulation results show the energy gains of the proposed MIP over the existing cost-based VNE approach.