Queueing Systems

, Volume 71, Issue 1–2, pp 53–78 | Cite as

Sojourn times in a processor sharing queue with multiple vacations

Open Access
Article

Abstract

We study an M/G/1 processor sharing queue with multiple vacations. The server only takes a vacation when the system has become empty. If he finds the system still empty upon return, he takes another vacation, and so on. Successive vacations are identically distributed, with a general distribution. When the service requirements are exponentially distributed we determine the sojourn time distribution of an arbitrary customer. We also show how the same approach can be used to determine the sojourn time distribution in an M/M/1-PS queue of a polling model, under the following constraints: the service discipline at that queue is exhaustive service, the service discipline at each of the other queues satisfies a so-called branching property, and the arrival processes at the various queues are independent Poisson processes. For a general service requirement distribution we investigate both the vacation queue and the polling model, restricting ourselves to the mean sojourn time.

Keywords

Processor sharing Multiple vacations Sojourn time Polling system Exhaustive service 

Mathematics Subject Classification (2000)

60K25 90B22 

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Copyright information

© The Author(s) 2012

Authors and Affiliations

  1. 1.INP, LAASUniversité de ToulouseToulouseFrance
  2. 2.LAAS-CNRSToulouseFrance
  3. 3.EURANDOMEindhovenThe Netherlands
  4. 4.Department of Mathematics and Computer ScienceTechnische Universiteit EindhovenEindhovenThe Netherlands
  5. 5.IRIT-CNRSToulouseFrance

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