SYSTEM, METHOD AND PROGRAM FOR PACKET TRANSFER DELAY QUARTILE MONITORING THRESHOLD CALCULATION

摘要

PROBLEM TO BE SOLVED: To provide a packet transfer delay quantile monitoring threshold calculation technology for calculating a monitoring threshold provided for a transfer delay quantile in accordance with a small number of sample measuring results while further reducing errors.

SOLUTION: A packet transfer delay quantile monitoring threshold calculation system comprises: an experience distribution function calculation means 101 for calculating an experience distribution function F1 from a sample set S obtained by pre-measurements; a density function calculation means 102 for calculating a density function F2 from the distribution function F1; a quantile density function calculation means 103 for calculating a density function F3 of a quantile (q) from the distribution function F1, the density function F2, the quantile (q) and a number (n) of samples in quantile calculation; a quantile distribution function calculation means 104 for calculating a distribution function F4 from the density function F3 of the quantile (q); and a threshold calculation means 105 for calculating an inverse function F4-1from the distribution function F4 of the quantile (q) and calculating an upper-limit threshold tu and a lower-limit threshold tl from a significant standard (a).

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