Abstract
We consider several multi-server retrial queueing models with exponential retrial times that arise in the literature of retrial queues. The effect of retrial rates on the behavior of the queue length process is investigated via sample path approach. We show that the number of customers in orbit and in the system as a whole are monotonically changed if the retrial rates in one system are bounded by the rates in second one. The monotonicity results are applied to show the convergence of generalized truncated systems that have been widely used for approximating the stationary queue length distribution in retrial queues.
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Shin, Y.W. Monotonicity properties in various retrial queues and their applications. Queueing Syst 53, 147–157 (2006). https://doi.org/10.1007/s11134-006-6702-0
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DOI: https://doi.org/10.1007/s11134-006-6702-0