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Closed queueing networks under congestion: non-bottleneck independence and bottleneck convergence

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  • Jonatha Anselmi

    ()

  • Bernardo D'Auria

    ()

  • Neil Walton

    ()

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    Abstract

    We analyze the behavior of closed product-form queueing networks when the number of customers grows to infinity and remains proportionate on each route (or class). First, we focus on the stationary behavior and prove the conjecture that the stationary distribution at non-bottleneck queues converges weakly to the stationary distribution of an ergodic, open product-form queueing network. This open network is obtained by replacing bottleneck queues with per-route Poissonian sources whose rates are determined by the solution of a strictly concave optimization problem. Then, we focus on the transient behavior of the network and use fluid limits to prove that the amount of fluid, or customers, on each route eventually concentrates on the bottleneck queues only, and that the long-term proportions of fluid in each route and in each queue solve the dual of the concave optimization problem that determines the throughputs of the previous open network.

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    Bibliographic Info

    Paper provided by Universidad Carlos III, Departamento de Estadística y Econometría in its series Statistics and Econometrics Working Papers with number ws121711.

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    Date of creation: Jun 2012
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    Handle: RePEc:cte:wsrepe:ws121711

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    Related research

    Keywords: Closed queueing networks; Product-form; Asymptotic independence; Fluid limit; Large population;

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