Communication Apparatus, Communication State Detecting Method, And Communication State Detecting Program

摘要

A packet interval (a time difference between sequentially received packets) in a certain previous time is calculated and a cumulative distribution function of the calculated packet interval is obtained. Meanwhile, a function value-corresponding to-flow end that is a boundary value of the cumulative distribution function to be considered as a flow end (timeout) in the range of a cumulative distribution function value is stored. From the cumulative distribution function obtained as described above, a value of a packet interval mapped to a cumulative distribution function value that matches the function value-corresponding to-flow end is set as a threshold. That is, the threshold is dynamically set based on a previous packet interval. Therefore, a packet stop period from a last packet reception time to a current time is measured, and it is detected as a flow timeout at a timing when the measured value is equal to or greater than the threshold.

主权项

1. A communication apparatus, comprising:
a threshold setting unit configured to set a threshold based on a packet interval that is a difference of reception times of a plurality of previously consecutively received packets; and a timeout detecting unit configured to detect whether a flow ends based on comparison of a packet stop period from a packet reception time to a current time and the threshold.