Analysis of Multiserver Retrial Queueing System: A Martingale Approach and an Algorithm of Solution

Details Analysis of Multiserver Retrial Queueing System: A Martingale Approach and an Algorithm of Solution Analysis of Multiserver Retrial Queueing System: A Martingale Approach and an Algorithm of Solution

2005-05-03

arxiv.org/abs/math/0505046v2

Annals of Operations Research 141 (2006) 19-50

Mathematics

Probability

To appear in "Annals of Operations Research" 141 (2006) 19-52. Replacement corrects a small number of misprints

Scientific paper

10.1007/%10479-006-5292-%

The paper studies a multiserver retrial queueing system with $m$ servers. Arrival process is a point process with strictly stationary and ergodic increments. A customer arriving to the system occupies one of the free servers. If upon arrival all servers are busy, then the customer goes to the secondary queue, orbit, and after some random time retries more and more to occupy a server. A service time of each customer is exponentially distributed random variable with parameter $\mu_1$. A time between retrials is exponentially distributed with parameter $\mu_2$ for each customer. Using a martingale approach the paper provides an analysis of this system. The paper establishes the stability condition and studies a behavior of the limiting queue-length distributions as $\mu_2$ increases to infinity. As $\mu_2\to\infty$, the paper also proves the convergence of appropriate queue-length distributions to those of the associated `usual' multiserver queueing system without retrials. An algorithm for numerical solution of the equations, associated with the limiting queue-length distribution of retrial systems, is provided.

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