Download e-book for kindle: An Introduction to Queueing Theory: and Matrix-Analytic by L. Breuer, Dieter Baum

By L. Breuer, Dieter Baum

ISBN-10: 1402036302

ISBN-13: 9781402036309

The textbook comprises the documents of a two-semester path on queueing concept, together with an creation to matrix-analytic tools. The path is directed to final yr undergraduate and primary yr graduate scholars of utilized chance and desktop technology, who've already accomplished an creation to likelihood conception. Its function is to offer fabric that's shut sufficient to concrete queueing versions and their functions, whereas supplying a legitimate mathematical origin for his or her research. A trendy a part of the booklet should be dedicated to matrix-analytic equipment. this can be a number of ways which expand the applicability of Markov renewal how to queueing idea through introducing a finite variety of auxiliary states. For the embedded Markov chains this ends up in transition matrices in block shape similar to the constitution of classical types. Matrix-analytic equipment became rather renowned in queueing conception over the past 20 years. The purpose to incorporate those in a scholars' creation to queueing conception has been the most motivation for the authors to put in writing the current e-book. Its target is a presentation of an important matrix-analytic recommendations like phase-type distributions, Markovian arrival procedures, the GI/PH/1 and BMAP/G/1 queues in addition to QBDs and discrete time ways.

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N=0 for all t ≥ 0, with Gn denoting the nth power of the matrix G. Proof: First we validate the solution by d d G·t e = dt dt ∞ n=0 tn n G = n! ∞ Gn n=1 d tn = dt n! ∞ Gn n=1 tn−1 = GeG·t (n − 1)! which holds for all t ≥ 0. Furthermore, it is obvious that ∞ GeG·t = G n=0 tn n G = n! ∞ n=0 tn n G n! G = eG·t G 45 Homogeneous Markov Processes on Discrete State Spaces and thus P (t) = eG·t is a solution of Kolmogorov’s forward and backward equations. Now we show uniqueness of the solution. Let P˜ (t) denote another solution of the forward equations.

It is known as Foster’s criterion. 33 Let X denote an irreducible Markov chain with countable state space E and transition matrix P . Further let F denote a finite subset of E. If there is a function h : E → R with inf{h(i) : i ∈ E} > −∞, such that the conditions k∈E pik h(k) < ∞ and k∈E pjk h(k) ≤ h(j) − ε hold for some ε > 0 and all i ∈ F and j ∈ E \ F , then X is positive recurrent. Proof: Without loss of generality we can assume h(i) ≥ 0 for all i ∈ E, since otherwise we only need to increase h by a suitable constant.

17 If the state j ∈ E is transient, then limn→∞ P n (i, j) = 0, regardless of the initial state i ∈ E. 15 yields rjj < ∞. 7) completes the proof. 3. Stationary Distributions Let X denote a Markov chain with state space E and π a measure on E. If P(X Xn = i) = P(X0 = i) = πi for all n ∈ N and i ∈ E, then X π is called stationary, and π is called a stationary measure for X . If furthermore π is a probability measure, then it is called stationary distribution for X . 18 Let X denote a Markov chain with state space E and transition matrix P .

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An Introduction to Queueing Theory: and Matrix-Analytic Methods by L. Breuer, Dieter Baum

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