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Analysis of Alternating-Priority Queueing Models with (Cross) Correlated Switchover Times

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Abstract

This paper analyzes a single server queueing system in which service is alternated between two queues and the server requires a (finite) switchover time to switch from one queue to the other. The distinction from classical results is that the sequence of switchover times from each of the queues need not be i.i.d. nor independent from each other; each sequence is merely required to form a stationary ergodic sequence. With the help of stochastic recursive equations explicit expressions are derived for a number of performance measures, most notably for the average delay of a customer and the average queue lengths under different service disciplines. With these expressions a comparison is made between the service disciplines and the influence of correlation is studied. Finally, through a number of examples it is shown that the correlation can significantly increase the mean delay and the average queue lengths indicating that the correlation between switchover times should not be ignored. This has important implications for communication systems in which a common communication channel is shared amongst various users and where the time between consecutive data transfers is correlated (for example in ad-hoc networks). In addition to this a number of notational mistakes in well-known existing literature are pointed out.

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Authors and Affiliations

  1. INRIA Sophia Antipolis, 06902, Sophia Antipolis, France

    Robin Groenevelt & Eitan Altman

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  1. Robin Groenevelt
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  2. Eitan Altman
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Correspondence to Robin Groenevelt.

Additional information

AMS subject classification: 68M20, 60J85

A shorter version of this work has been published in the proceedings of IEEE Infocom 2005.

This work was partly sponsored by the EURONGI network of excellence.

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Groenevelt, R., Altman, E. Analysis of Alternating-Priority Queueing Models with (Cross) Correlated Switchover Times. Queueing Syst 51, 199–247 (2005). https://doi.org/10.1007/s11134-005-3751-8

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  • DOI: https://doi.org/10.1007/s11134-005-3751-8

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