METHOD OF DETECTION OF PORTABLE USER EQUIPMENT IN A PREDETERMINED AREA, INSIDE OR EXTERIOR OF A VEHICLE BY ULTRA HIGH FREQUENCY, DETECTION DEVICE AND ASSOCIATED USER EQUIPMENT

摘要

The present invention relates to a method for detecting a portable user device (SD) in a predetermined area (ZD1, ZD2, ZD3), inside or outside a vehicle (V) by ultra-high frequency using a detection device (10) on board the vehicle, said high-frequency communication, of the BLE type, comprising two modes, a first so-called signaling mode, and a second so-called communication mode, the invention proposing that the first mode comprises the following steps: • positioning of the portable equipment item at a predetermined and fixed distance from the detection device, • emission of a signal (“ADV IND”, “SCAN REQUEST”) by the device detection with a predetermined transmission power (P) on one channel (CH37), • as long as the detection device receives a response signal from the portable equipment (“SCAN RESPONSE”, “SCAN REQUEST”), then repetition the transmission of the signal at the same transmission power on both a other channels (CH38, CH39), otherwise repetition of the transmission of the signal on one channel (CH37) with said reduced transmission power, • if the detection device no longer receives a response signal, then the transmission power (P) is compared with a predetermined threshold transmit power (PT), and a correction (A) is applied to the transmit power (Pe) of the signals sent by the detection device during the second mode in order to detect the portable equipment in a predetermined area.