Probe interval designs that improve accuracy of CoMPACT monitor
We have proposed the CoMPACT monitor; it achieves the scalable measurement of the one-way delay distribution for each flow. CoMPACT monitor transforms the one-way delay data obtained by active measurement by using the passively monitored traffic data of the target flow. A recent study reported that using an inter-probe time with Gamma distribution can improve the accuracy of simple active measurements. The improvement is in terms of the ensemble mean of the stationary stochastic process. In this paper, to improve accuracy of CoMPACT monitor, we apply Gamma-probing as the active measurement component of CoMPACT monitor. The significant issue in this application is in the difference between objects targeted for measurement; CoMPACT monitor estimates the time average of sample path rather than the ensemble mean. We investigate the characteristics of CoMPACT monitor and Gamma-probing, and verify the improved accuracy of CoMPACT monitor through simulations.
gamma distribution qos measurement delay measurement change-of-measure