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Kronecker-Based Infinite Level-Dependent QBD Processes

Part of: Markov processes Physiological, cellular and medical topics

Published online by Cambridge University Press:  30 January 2018

TuǦrul Dayar  and
M. Can Orhan
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.
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Abstract

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Markovian systems with multiple interacting subsystems under the influence of a control unit are considered. The state spaces of the subsystems are countably infinite, whereas that of the control unit is finite. A recent infinite level-dependent quasi-birth-and-death model for such systems is extended by facilitating the automatic representation and generation of the nonzero blocks in its underlying infinitesimal generator matrix with sums of Kronecker products. Experiments are performed on systems of stochastic chemical kinetics having two or more countably infinite state space subsystems. Results indicate that, even though more memory is consumed, there are many cases where a matrix-analytic solution coupled with Lyapunov theory yields a faster and more accurate steady-state measure compared to that obtained with simulation.

Keywords

Markov processnumerical analysissimulationbiologyqueues: theory

MSC classification

Primary: 60J22: Computational methods in Markov chains
Secondary: 60J28: Applications of continuous-time Markov processes on discrete state spaces 92C45: Kinetics in biochemical problems (pharmacokinetics, enzyme kinetics, etc.) 92D25: Population dynamics (general)
Type
Research Article
Information
Journal of Applied Probability , Volume 49 , Issue 4 , December 2012 , pp. 1166 - 1187
Copyright
© Applied Probability Trust 

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