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Asymptotics for the stationary distribution in a discrete-time two-dimensional quasi-birth-and-death process

Published: 01 June 2013 Publication History

Abstract

We consider a discrete-time two-dimensional process $\{(L_{n}^{(1)},L_{n}^{(2)})\}$ on $\mathbb{Z}_{+}^{2}$ with a background process { J n } on a finite set, where individual processes $\{L_{n}^{(1)}\}$ and $\{L_{n}^{(2)}\}$ are both skip free. We assume that the joint process $\{Y_{n}\}=\{(L_{n}^{(1)},L_{n}^{(2)},J_{n})\}$ is Markovian and that the transition probabilities of the two-dimensional process $\{(L_{n}^{(1)},L_{n}^{(2)})\}$ are modulated depending on the state of the background process { J n }. This modulation is space homogeneous, but the transition probabilities in the inside of $\mathbb{Z}_{+}^{2}$ and those around the boundary faces may be different. We call this process a discrete-time two-dimensional quasi-birth-and-death (2D-QBD) process, and obtain the decay rates of the stationary distribution in the coordinate directions. We also distinguish the case where the stationary distribution asymptotically decays in the exact geometric form, in the coordinate directions.

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Information

Published In

cover image Queueing Systems: Theory and Applications
Queueing Systems: Theory and Applications  Volume 74, Issue 2-3
June 2013
260 pages

Publisher

J. C. Baltzer AG, Science Publishers

United States

Publication History

Published: 01 June 2013

Author Tags

  1. 60J10
  2. 60J22
  3. 60K25
  4. Asymptotic property
  5. Decay rate
  6. Matrix analytic method
  7. Quasi-birth-and-death process
  8. Stationary distribution
  9. Two-dimensional reflecting random walk
  10. Two-queue model
  11. k-Limited service

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  • (2022)The kernel method tail asymptotics analytic approach for stationary probabilities of two-dimensional queueing systemsQueueing Systems: Theory and Applications10.1007/s11134-021-09727-6100:1-2(95-131)Online publication date: 1-Feb-2022
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  • (2021)Asymptotic properties of the occupation measure in a multidimensional skip-free Markov-modulated random walkQueueing Systems: Theory and Applications10.1007/s11134-020-09673-997:1-2(125-161)Online publication date: 1-Feb-2021
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  • (2018)Exact asymptotic formulae of the stationary distribution of a discrete-time two-dimensional QBD processQueueing Systems: Theory and Applications10.5555/3288543.328856790:3-4(351-403)Online publication date: 1-Dec-2018
  • (2016)Simple error bounds for the QBD approximation of a special class of two dimensional reflecting random walksProceedings of the 11th International Conference on Queueing Theory and Network Applications10.1145/3016032.3016048(1-5)Online publication date: 13-Dec-2016
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