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.

Date of Patent:
Jan. 05, 2021

Filed:

Feb. 05, 2019
Applicant:

Alaxala Networks Corporation, Kawasaki, JP;

Inventors:

Shinichi Akahane, Kawasaki, JP;

Nobuhito Matsuyama, Kawasaki, JP;

Mitsuru Nagasaka, Kawasaki, JP;

Kazuo Sugai, Kawasaki, JP;

Takayuki Muranaka, Kawasaki, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 12/851 (2013.01); H04L 12/46 (2006.01); H04L 12/823 (2013.01); H04L 12/841 (2013.01); H04L 12/801 (2013.01);
U.S. Cl.
CPC ...
H04L 47/2483 (2013.01); H04L 12/4645 (2013.01); H04L 47/16 (2013.01); H04L 47/28 (2013.01); H04L 47/32 (2013.01); H04L 12/4641 (2013.01);
Abstract

A communication device: stores flow condition information for identifying a flow and flow counter information that indicates, for each flow, an input flow volume of a flow inputted to the communication device, and an output flow volume of a flow outputted by the communication device; identifies a flow to which data inputted to the communication device belongs, with reference to the flow condition information; updates the input flow volume of the flow in the flow counter information; identifies a flow to which data outputted by the communication device belongs, with reference to the flow condition information; updates the output flow volume of the flow in the flow counter information; and identifies a flow in which a communication anomaly has occurred on the basis of results of a comparison process for comparing the input flow volume to the output flow volume with reference to the flow counter information.


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