In many applications, signicant correlations between arrivals of load-generating events make the numerical evaluation of the load of a system a challenging problem. Here, we construct very accurate approximations of the workload distribution of the MAP/G/1 queue that capture the tail behavior of the exact workload distribution and provide a small relative error. Motivated by statistical analysis, we assume that the service times are a mixture of a phase-type and a heavy-tailed distribution. With the aid of perturbation analysis, we derive our approximations as a sum of the workload distribution of the MAP/PH/1 queue and a heavy-tailed component that depends on the perturbation parameter. We refer to our approximations as corrected phase-type approximations, andwe exhibit their performance with a numerical study.
|Publication status||Published - 2013|
|Event||7th International Conference on Lévy Processes 2013: Theory and Applications - Wrocław, Poland|
Duration: 15 Jul 2013 → 19 Jul 2013
Conference number: 7
|Conference||7th International Conference on Lévy Processes 2013|
|Period||15/07/13 → 19/07/13|