Abstract

Entropy maximisation is applied to characterise the distributional form of the steady-state probabilities of a G/G/ c/PR queue with c (≥ 2) parallel servers and R (≥ 2) priority classes under preemptive resume (PR) rule. For R = 2, closed-form expressions are derived as explicit functions of appropriate but unknown constraints which are approximately determined using analytical results for GE-type queues. The applicability of the maximum entropy (ME) solutions for R = 2 is also extended to the case of R > 2 via the method of class aggregation. Typical numerical results are presented to illustrate the credibility of ME approximations against simulations. Comments on the role of the GE/GE/ c/PR queue as a building block for the approximate analysis of arbitrary queueing networks are included.

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