PROCEDE POUR LA LOCALISATION D'UN DISPOSITIF PORTATIF DE SYSTEME DE SECURISATION MAINS-LIBRES, ET SYSTEME DE SECURISATION MAINS-LIBRES ASSOCIE

摘要

The process involves transmitting a code with two successive sequences of definite distinct powers to a portable device. The device receives a signal with an indication representing the extraction of low power sequences. The device emits the signal to a fixed equipment. The equipment receives the signal, and an information representing the detection of localized zone in which the device is positioned. An Independent claim is also included for a device controlling the security system of a closed space.