公开(公告)号：US10887241B2

公开(公告)日：2021-01-05

申请号：US16267415

申请日：2019-02-05

Applicant: ALAXALA Networks Corporation

Inventor： Shinichi Akahane ,  Nobuhito Matsuyama ,  Mitsuru Nagasaka ,  Kazuo Sugai ,  Takayuki Muranaka

IPC: H04L12/851 ,  H04L12/46 ,  H04L12/823 ,  H04L12/841 ,  H04L12/801

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.