METHOD FOR DETECTING PORTABLE USER EQUIPMENT IN A PREDETERMINED AREA, IN OR OUTSIDE A VEHICLE BY ULTRA HIGH FREQUENCY, DETECTION DEVICE AND USER EQUIPMENT THEREFOR

摘要

The present invention relates to a method for detecting a user portable equipment (SD) in a predetermined area (ZD1, ZD2, ZD3), inside or outside a vehicle (V) by ultra high frequency using a detection device (10) embedded in the vehicle, said high frequency communication, type BLE, comprising two modes, a first so-called signaling mode, and a second so-called communication mode, invention proposing that the first mode comprises the following steps: • positioning the portable equipment at a predetermined and fixed distance from the detection device, • sending a signal ("ADV IND", "SCAN REQUEST") by the device with a predetermined transmission power (P) on a channel (CH37), • as long as the detection device receives a response signal ("SCAN RESPONSE") from the portable equipment, then repetition of the issue of u signal at the same transmitting power on the other two channels (CH38, CH39), otherwise repeating the transmission of the signal on a channel (CH37) with said decreased transmission power, • if the detection device does not receive more than a response signal, then the transmission power (P) is compared with a predetermined threshold transmission power (PT), and a correction (A) is applied to the transmission power (Pe) of the signals sent by the detection device during the second mode to detect the portable equipment in a predetermined area.