Title:
RADIO TERMINAL DETECTING SYSTEM, RADIO TERMINAL DETECTING METHOD, AND STORAGE MEDIUM FOR STORING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/010332
Kind Code:
A1
Abstract:
This radio terminal detecting system is provided with: a radio wave identifying unit for extracting, from radio waves from each individual radio terminal detected from received radio waves, identification information corresponding to the radio terminal that is the transmission source; a radio wave strength measuring unit for measuring the radio wave strength of the radio waves from each individual radio terminal; a distance estimating unit for estimating the attenuation rate of the radio wave strength with respect to distance on the basis of the number of radio wave transmission source radio terminals detected from the received radio waves, and estimating the distance to each individual radio terminal on the basis of the estimated attenuation rate; and a notifying unit for determining, on the basis of the identification information, whether the radio wave transmission source radio terminal is registered as a suspicious radio terminal, and notifying a user that the suspicious radio terminal has been detected if the estimated distance to the radio wave transmission source radio terminal is equal to or less than a predetermined distance.
Inventors:
SAKAI JUN (JP)
KITSUNEZUKA MASAKI (JP)
OHTSUJI TAICHI (JP)
TAKEUCHI TOSHIKI (JP)
NISHIMURA SHOJI (JP)
HIRAKAWA YASUFUMI (JP)
KITSUNEZUKA MASAKI (JP)
OHTSUJI TAICHI (JP)
TAKEUCHI TOSHIKI (JP)
NISHIMURA SHOJI (JP)
HIRAKAWA YASUFUMI (JP)
Application Number:
PCT/JP2020/027064
Publication Date:
January 21, 2021
Filing Date:
July 10, 2020
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G08B13/22; H04M1/00; H04W4/029; H04W64/00
Domestic Patent References:
| WO2017068668A1 | 2017-04-27 |
Foreign References:
| JP2018045448A | 2018-03-22 | |||
| JP2016225984A | 2016-12-28 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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