Tampere University of Technology

TUTCRIS Research Portal

Monitoring intrusion in an area using WIFI-enabled devices

Research output: PatentScientific


Original languageEnglish
Patent number9520041
IPCG08B 13/18 (20060101); G08B 13/24 (20060101); G08B 13/187 (20060101); G01S 7/292 (20060101); G01S 5/02 (20100101); G01S 11/06 (20060101); H04W 76/02 (20090101);
Publication statusPublished - 13 Dec 2016
Publication typeH1 Granted patent


For monitoring an area, signal strength samples are obtained (S1) by sampling a data signal transmitted from at least one first device and received by at least one second device, and measuring a signal strength of the sampled data signal. The signal strength samples are processed (S2) by forming consecutive first groups of N consecutive signal strength samples, calculating first standard deviations for each of the consecutive first groups, forming consecutive second groups of N consecutive first standard deviations, and calculating second standard deviations for each of the consecutive second groups. Based on the second standard deviations, it is detected (S3) if a fluctuation in the data signal received by the second device has occurred that represents an intrusion in the area.