On Lattice Path Counting and the Random Product Representation, with Applications to the Er/M/1 Queue and the M/Er/1 Queue

2018 ◽  
Vol 21 (4) ◽  
pp. 1119-1149 ◽  
Author(s):  
Xiaoyuan Liu ◽  
Brian Fralix
2016 ◽  
Vol 53 (1) ◽  
pp. 106-120 ◽  
Author(s):  
Michael N. Katehakis ◽  
Laurens C. Smit ◽  
Floske M. Spieksma

Abstract This paper provides a comparison of the successive lumping (SL) methodology developed in Katehakis et al. (2015) with the popular lattice path counting (Mohanty (1979)) in obtaining rate matrices for queueing models, satisfying the specific quasi birth and death structure as in Van Leeuwaarden et al. (2009) and Van Leeuwaarden and Winands (2006). The two methodologies are compared both in terms of applicability requirements and numerical complexity by analyzing their performance for the same classical queueing models considered in Van Leeuwaarden et al. (2009). The main findings are threefold. First, when both methods are applicable, the SL-based algorithms outperform the lattice path counting algorithm (LPCA). Second, there are important classes of problems (for example, models with (level) nonhomogenous rates or with finite state spaces) for which the SL methodology is applicable and for which the LPCA cannot be used. Third, another main advantage of SL algorithms over lattice path counting is that the former includes a method to compute the steady state distribution using this rate matrix.


SIAM Review ◽  
1983 ◽  
Vol 25 (4) ◽  
pp. 592-593
Author(s):  
L. F. Takacs

1993 ◽  
Vol 14 (1) ◽  
pp. 43-51 ◽  
Author(s):  
C. Krattenthaler ◽  
S.G. Mohanty

1994 ◽  
Vol 68 (1) ◽  
pp. 215-217
Author(s):  
Jane Friedman ◽  
Ira Gessel ◽  
Doron Zeilberger

1980 ◽  
Vol 143 (4) ◽  
pp. 524
Author(s):  
M. Knott ◽  
Sri Gopal Mohanty

2009 ◽  
Vol 46 (02) ◽  
pp. 507-520 ◽  
Author(s):  
Johan S. H. van Leeuwaarden ◽  
Mark S. Squillante ◽  
Erik M. M. Winands

In this paper we consider a class of quasi-birth-and-death processes for which explicit solutions can be obtained for the rate matrix R and the associated matrix G . The probabilistic interpretations of these matrices allow us to describe their elements in terms of paths on the two-dimensional lattice. Then determining explicit expressions for the matrices becomes equivalent to solving a lattice path counting problem, the solution of which is derived using path decomposition, Bernoulli excursions, and hypergeometric functions. A few applications are provided, including classical models for which we obtain some new results.


2009 ◽  
Vol 46 (2) ◽  
pp. 507-520 ◽  
Author(s):  
Johan S. H. van Leeuwaarden ◽  
Mark S. Squillante ◽  
Erik M. M. Winands

In this paper we consider a class of quasi-birth-and-death processes for which explicit solutions can be obtained for the rate matrix R and the associated matrix G. The probabilistic interpretations of these matrices allow us to describe their elements in terms of paths on the two-dimensional lattice. Then determining explicit expressions for the matrices becomes equivalent to solving a lattice path counting problem, the solution of which is derived using path decomposition, Bernoulli excursions, and hypergeometric functions. A few applications are provided, including classical models for which we obtain some new results.


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