US 12,381,801 B2
Traffic monitoring device and traffic monitoring method
Hiroyuki Uzawa, Tokyo (JP); Yusuke Sekihara, Tokyo (JP); Saki Hatta, Tokyo (JP); Shuhei Yoshida, Tokyo (JP); and Namiko Ikeda, Tokyo (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/573,730
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
PCT Filed Jun. 30, 2021, PCT No. PCT/JP2021/024785
§ 371(c)(1), (2) Date Dec. 22, 2023,
PCT Pub. No. WO2023/276054, PCT Pub. Date Jan. 5, 2023.
Prior Publication US 2024/0235974 A1, Jul. 11, 2024
Int. Cl. H04L 43/0876 (2022.01); H04L 43/026 (2022.01); H04L 43/022 (2022.01)
CPC H04L 43/0876 (2013.01) [H04L 43/026 (2013.01); H04L 43/022 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A traffic monitoring device, the device comprising:
one or more processors; and
a storage device storing a program to be executed by the one or more processors, the program including instructions for:
identifying a flow of each packet of a plurality of packets received from a monitoring target network as a first flow of a first flow group or a second flow of a second flow group different from the first flow group based on a rule table in which a predetermined rule is registered;
aggregating a traffic amount of each of the first flows of the first flow group;
calculating an occurrence probability of each flow based on a result of sampling the flows of the plurality of packets; and
estimating the traffic amount of each of the second flows of the second flow group by multiplying a total value of the traffic amount of the second flow group by the occurrence probability of each of the second flows of the second flow group.