Experience-based admission control with type-specific overbooking

  • Authors:
  • Jens Milbrandt;Michael Menth;Jan Junker

  • Affiliations:
  • Institute of Computer Science, University of Würzburg, Germany;Institute of Computer Science, University of Würzburg, Germany;Institute of Computer Science, University of Würzburg, Germany

  • Venue:
  • IPOM'06 Proceedings of the 6th IEEE international conference on IP Operations and Management
  • Year:
  • 2006

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Abstract

Experience-based admission control (EBAC) is a hybrid approach combining the classical parameter-based and measurement-based admission control schemes. EBAC calculates an appropriate overbooking factor used to overbook link capacities with resource reservations in packet-based networks. This overbooking factor correlates with the average peak-to-mean rate ratio of all admitted traffic flows on the link. So far, a single overbooking factor is calculated for the entire traffic aggregate. In this paper, we propose type-specific EBAC which provides a compound overbooking factor considering different types of traffic that subsume flows with similar peak-to-mean rate ratios. The concept can be well implemented since it does not require type-specific traffic measurements. We give a proof of concept for this extension and compare it with the conventional EBAC approach. We show that EBAC with type-specific overbooking leads to better resource utilization under normal conditions and to faster response times for changing traffic mixes.