Two Queues with Weighted One-Way Overflow

Peter Sendfeld ()
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Peter Sendfeld: University of Osnabrück

Methodology and Computing in Applied Probability, 2008, vol. 10, issue 4, 531-555

Abstract: Abstract We consider an open queueing network consisting of two queues with Poisson arrivals and exponential service times and having some overflow capability from the first to the second queue. Each queue is equipped with a finite number of servers and a waiting room with finite or infinite capacity. Arriving customers may be blocked at one of the queues depending on whether all servers and/or waiting positions are occupied. Blocked customers from the first queue can overflow to the second queue according to specific overflow routines. Using a separation method for the balance equations of the two-dimensional server and waiting room demand process, we reduce the dimension of the problem of solving these balance equations substantially. We extend the existing results in the literature in three directions. Firstly, we allow different service rates at the two queues. Secondly, the overflow stream is weighted with a parameter p ∈ [0,1], i.e., an arriving customer who is blocked and overflows, joins the overflow queue with probability p and leaves the system with probability 1 − p. Thirdly, we consider several new blocking and overflow routines.

Keywords: Weighted traffic overflow systems; Queueing; Loss probabilities; Waiting spaces; Separation method; 90B22, 90B15; Secondary 60K25, 60J22 (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (2)

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DOI: 10.1007/s11009-007-9062-2

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