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Steady-state analysis of a multiclass MAP/PH/c queue with acyclic PH retrials

Published online by Cambridge University Press:  09 December 2016

Tuǧrul Dayar*
Affiliation:
Bilkent University
M. Can Orhan*
Affiliation:
Bilkent University
*
* Postal address: Department of Computer Engineering, Bilkent University, TR‒06800 Bilkent, Ankara, Turkey.
* Postal address: Department of Computer Engineering, Bilkent University, TR‒06800 Bilkent, Ankara, Turkey.

Abstract

A multiclass c-server retrial queueing system in which customers arrive according to a class-dependent Markovian arrival process (MAP) is considered. Service and retrial times follow class-dependent phase-type (PH) distributions with the further assumption that PH distributions of retrial times are acyclic. A necessary and sufficient condition for ergodicity is obtained from criteria based on drifts. The infinite state space of the model is truncated with an appropriately chosen Lyapunov function. The truncated model is described as a multidimensional Markov chain, and a Kronecker representation of its generator matrix is numerically analyzed.

Type
Research Papers
Copyright
Copyright © Applied Probability Trust 2016 

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