Multi-server Batch-service Systems |
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Authors: | I. J. B. F. Adan,& J. A C. Resing |
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Affiliation: | Department of Mathematics and Computing Science, Eindhoven University of Technology |
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Abstract: | In this paper we analyse a multi-server batch-service queueing model. Customers arrive one by one according to a Poisson process. They are served in batches under the following threshold policy: when a server becomes available a new batch of waiting customers is taken into service as soon as their number reaches a threshold a . The maximum allowable batch size is equal to b . Two classes of batch service time distributions are considered: Coxian-2 and Erlang- r distributions. In both cases the queueing model can be described by a Markov process. For this process it is shown that the equilibrium probabilities for states with all servers busy can be expressed as a finite sum of geometric terms. This form is used to derive a closed form expression for the waiting time distribution. |
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Keywords: | queueing model Coxian and Erlang service time distribution Markov process on semi-infinite strip geometric equilibrium probabilities |
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