The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2016
Filed:
Jul. 24, 2012
Hiroyuki Iizuka, Tokyo, JP;
Toshiyasu Tanaka, Tokyo, JP;
Koichi Yoshimura, Tokyo, JP;
Masahito Iwai, Tokyo, JP;
Tetsuya Ito, Tokyo, JP;
Hiroyuki Iizuka, Tokyo, JP;
Toshiyasu Tanaka, Tokyo, JP;
Koichi Yoshimura, Tokyo, JP;
Masahito Iwai, Tokyo, JP;
Tetsuya Ito, Tokyo, JP;
NEC Communication Systems, Ltd., Tokyo, JP;
Abstract
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.