公开(公告)号：US20210352516A1

公开(公告)日：2021-11-11

申请号：US17282835

申请日：2019-09-05

Applicant: NEC Corporation

Inventor： Anan SAWABE ,  Takanori IWAI

IPC: H04W28/02 ,  H04W28/08 ,  H04W28/10

Abstract: An estimating apparatus (1) according to the present invention includes a plurality of feature quantity calculating units (111 to 11n) configured to implement processing of calculating, from a communication traffic, a differing feature quantity group for each of a plurality of types of control attributes relating to communication control, the plurality of feature quantity calculating units being each associated with each of the plurality of types of control attributes, a calculating unit (12) configured to calculate, with regard to each of two or more of the plurality of types of control attributes, each of the feature quantity groups from the communication traffic by use of the feature quantity calculating unit being associated with each of the control attributes, and an estimating unit (13) configured to estimate an attribute value of each of the two or more control attributes from each of the calculated feature quantity groups.

公开(公告)号：US20200328947A1

公开(公告)日：2020-10-15

申请号：US16758209

申请日：2018-10-25

Applicant: NEC Corporation

Inventor： Takanori IWAI ,  Anan SAWABE

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/851 ,  H04L1/00

Abstract: A traffic analysis apparatus includes: a first means that estimates a state sequence from time-series data of communication traffic based on a hidden Markov model, and groups, into one group, a plurality of patterns with resembling state transitions in the state sequence to perform extraction of a state sequence, with taking the plurality of patterns grouped into one group as one state; and a second means that determines an application state corresponding to the time-series data based on the state sequence extracted by the first means and predetermined application characteristics.

公开(公告)号：US20200313992A1

公开(公告)日：2020-10-01

申请号：US16089671

申请日：2017-03-21

Applicant: NEC Corporation

Inventor： Anan SAWABE

IPC: H04L12/26

Abstract: A communication system according to the present invention includes: a transmission-side apparatus that transmits a packet train composed of a plurality of estimation packets for estimating an available bandwidth; and a reception-side apparatus that receives the packet train, stores one or more lower-limit expansion ideal curves, one or more in-range ideal curves, and one or more upper-limit expansion ideal curves; calculates an actual amount of increase in delay occurring in the respective estimation packets based on a reception time of the estimation packet; selects an ideal curve most similar to the increase tendency of a delay indicated by the calculated amount of increase in delay, from among the lower-limit expansion ideal curve, the in-range ideal curve, and the upper-limit expansion ideal curve; and estimates the available bandwidth, based on a selection result on the ideal curve.