# On transient queue-size distribution in the batch-arrivals system with a single vacation policy

Wojciech M. Kempa

# Abstract:

A queueing system with batch Poisson arrivals and single vacations with the exhaustive service discipline is investigated. As the main result the representation for the Laplace transform of the transient queue-size distribution in the system which is empty before the opening is obtained. The approach consists of few stages. Firstly, some results for a "usual'' system without vacations corresponding to the original one are derived. Next, applying the formula of total probability, the analysis of the original system on a single vacation cycle is brought to the study of the "usual'' system. Finally, the renewal theory is used to derive the general result. Moreover, a numerical approach to analytical results is discussed and some illustrative numerical examples are given.

# Keywords:

queue-size distribution, batch Poisson arrivals, renewal theory, single vacation, transient state

90B22, 60K25

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