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On resource sharing and careful overbooking for network virtualization
Responsible organisation
2011 (English)In: International Journal of Communication Networks and Distributed Systems, ISSN 1754-3916, E-ISSN 1754-3924, Vol. 6, no 3, 232-248 p.Article in journal (Refereed) Published
Abstract [en]

Network Virtualization implies the need for sharing network resources. However, exclusive resource allocation to users drives blocking probabilities and cost while potentially leaving precious resources under-utilized in constrained environments. Motivated by these observations, this paper analyzes careful overbooking according to Service Level Agreements that specify desired degrees of availability. Besides of full availability of the requested resources, a second level of limited availability, implying a well-defined reduction of the allocated resource, is taken into account. Particular attention is paid to the gain borderline, representing the possibility of accommodating one extra user beyond exclusive allocation without violating the SLAs. Simple but telling formulae provide insights into requirements for careful overbooking, worst-case capacity reduction factors from full to limited availability, and the conditions under which it is sensible to integrate users with different activity levels. We also link capacity reductions to potential decreases in Quality of Experience.

Place, publisher, year, edition, pages
Inderscience Publishers , 2011. Vol. 6, no 3, 232-248 p.
Keyword [en]
network virtualization, resource virtualization, resource sharing, overbooking, gain, availability, Service Level Agreement, Quality of Experience
National Category
Telecommunications Computer Science
Identifiers
URN: urn:nbn:se:bth-7228DOI: 10.1504/IJCNDS.2011.039533Local ID: oai:bth.se:forskinfoC13C96AEB2331E4BC125774F0069EB89OAI: oai:DiVA.org:bth-7228DiVA: diva2:834811
Available from: 2012-11-02 Created: 2010-06-27 Last updated: 2015-06-30Bibliographically approved

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