US 12,217,587 B2
Wireless terminal detection system, wireless terminal detection device, wireless terminal detection method, and storage medium having program stored therein
Jun Sakai, Tokyo (JP); Masaki Kitsunezuka, Tokyo (JP); Toshiki Takeuchi, Tokyo (JP); Taichi Ohtsuji, Tokyo (JP); Shoji Nishimura, Tokyo (JP); and Yasufumi Hirakawa, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Appl. No. 17/625,412
Filed by NEC Corporation, Tokyo (JP)
PCT Filed Jul. 10, 2020, PCT No. PCT/JP2020/027050
§ 371(c)(1), (2) Date Jan. 7, 2022,
PCT Pub. No. WO2021/010330, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-130569 (JP), filed on Jul. 12, 2019.
Prior Publication US 2022/0270460 A1, Aug. 25, 2022
Int. Cl. G08B 21/02 (2006.01); G08B 25/10 (2006.01); H04W 4/029 (2018.01); H04W 4/38 (2018.01)
CPC G08B 21/02 (2013.01) [G08B 25/10 (2013.01); H04W 4/029 (2018.02); H04W 4/38 (2018.02)] 9 Claims
OG exemplary drawing
 
1. A wireless terminal detection system comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
measure a position of a reception-side wireless terminal;
determine, based on position history information of the reception-side wireless terminal, whether the reception-side wireless terminal is moving or resting at a position measurement date/time indicated by the position history information, and extract, as time intervals of individual movement patterns, respectively, time intervals from when the reception-side wireless terminal starts moving until the moving ends and time intervals from when the reception-side wireless terminal starts resting until the resting ends;
classify the movement patterns into ordinary patterns and non-ordinary patterns based on classification results in which the movement patterns are classified in accordance with times and positions; and
determine whether a transmission-side wireless terminal, which is a transmission source of radio waves received by the reception-side wireless terminal, is a suspicious terminal based on a reception history of radio waves from the transmission-side wireless terminal in time intervals classified as the non-ordinary patterns.