Corrected phase-type approximations for the workload of the MAP/G/1 queue with heavy-tailed service times.

E. Vatamidou, I. Adan, M. Vlasiou, A.P. Zwart

Research output: Chapter in Book / Report / Conference proceedingConference contributionAcademicpeer-review

Abstract

In many applications, significant correlations between arrivals of load-generating events make the numerical evaluation of the load of a system a challenging problem. Here, we construct very accurate approximations of the workload distribution of the MAP/G/1 queue that capture the tail behavior of the exact workload distribution and provide a small relative error. Motivated by statistical analysis, we assume that the service times are a mixture of a phase-type and a heavy-tailed distribution. With the aid of perturbation analysis, we derive our approximations as a sum of the workload distribution of the MAP/PH/1 queue and a heavytailed component that depends on the perturbation parameter. We refer to our approximations as corrected phase-type approximations, and we exhibit their performance with a numerical study.
Original languageEnglish
Title of host publicationProceedings of IFIPWG 7.3
Pages53-55
DOIs
Publication statusPublished - 2013

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