Design of Probe Intervals to Improve Accuracy of CoMPACT Monitor

Abstract

We have proposed CoMPACT monitor that achieves scalable measurement of one-way delay distribution for each flow. CoMPACT monitor is technique that transforms one-way delay data obtained by active measurement by using passively monitored traffic data of the target flow. In a recent study, it was reported that by using an inter-probe time that has a Gamma distribution can improve the accuracy of simple active measurement. The improvement is in terms of the ensemble mean of stationary stochastic process. In this paper, to improve accuracy of CoMPACT monitor, we apply Gamma-probing as an active measurement of CoMPACT monitor. The significant issue in this application is in the difference between objects to measure; CoMPACT monitor estimates not the ensemble mean but the time average of sample path. We investigate the characteristics of CoMPACT monitor and Gamma-probing, and verify the accuracy improvement of CoMPACT monitor through simulations.