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Proceedings Paper

Discrete-time queues with general service times and general server interruptions
Author(s): Dieter Fiems; Bart Steyaert; Herwig Bruneel
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Paper Abstract

In this contribution, we investigate a discrete-time single- server queue subjected to server interruptions. Server interruptions are modeled as an on/off process with geometrically distributed on-periods and generally distributed off-periods. As message lengths can exceed one time-slot, different operation modes are considered depending on whether service of an interrupted message continues, partially restarts or completely restarts after an interruption. For all alternatives, we establish expressions for the steady-state probability generating functions of the buffer contents at message departure time and at random slot boundaries. From these results, closed- form expressions for various performance measures, such as mean and variance of the buffer occupancy, can be established. As an application, we show that this model is able to assess performance of low-priority traffic in a two- priority HOL scheduling discipline. We then illustrate our approach with some numerical examples.

Paper Details

Date Published: 2 February 2001
PDF: 12 pages
Proc. SPIE 4211, Internet Quality and Performance and Control of Network Systems, (2 February 2001); doi: 10.1117/12.417475
Show Author Affiliations
Dieter Fiems, Ghent Univ. (Belgium)
Bart Steyaert, Ghent Univ. (Belgium)
Herwig Bruneel, Ghent Univ. (Belgium)


Published in SPIE Proceedings Vol. 4211:
Internet Quality and Performance and Control of Network Systems
Angela L. Chiu; Frank Huebner; Robert D. van der Mei, Editor(s)

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