Sample path moderate deviations for the cumulative fluid produced by an increasing number of exponential on-off sources

  • Authors:
  • Kurt Majewski

  • Affiliations:
  • Siemens AG, Munich, Germany 81730

  • Venue:
  • Queueing Systems: Theory and Applications
  • Year:
  • 2007

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Abstract

We consider the superposition of the cumulative fluid generated by an increasing number of stationary iid on-off sources with exponential iid on- and off-time distributions. We establish a family of sample path large deviation principles when the fluid is centered and then scaled with a factor between the inverse of the number of sources and its square root. The common rate function in this family also appears in a large deviation principle for the tail probabilities of an integrated Ornstein---Uhlenbeck process. When the produced fluid is centered and scaled with the square root of the inverse of the number of sources it converges to this integrated Ornstein---Uhlenbeck process in distribution. We discuss several representations of the rate function. We apply the results to queueing systems loaded with on-off traffic and approaching critical loading.