Abstract: This relates to a method for geolocating a terminal of a wireless communication system. The terminal detects one or more identifiers of neighbouring transmitting devices. The terminal sends the detected identifies in a message to an access network. A server of the access network determines, for each identifier, a score representative of the reliability of the identifier relative to a geolocation database. For this purpose, the server uses an identifier reliability database that stores identifiers of transmitting devices and their respective scores. The geolocation database stores identifiers of transmitting devices and their respective geographical positions. The server selects the identifiers having the best scores to geolocate the terminal using the geolocation database.

Abstract: Disclosed is a method for updating a database of a geolocation server using a wireless communication system. The database includes a table associating an identifier of a transmitting device with at least one piece of information on its geographical position. The communication system includes an access network and a terminal communicating with the access network and with the transmitting devices according to two distinct protocols. The terminal receives a message emitted by a transmitting device and including an identifier of the transmitting device. The terminal emits a message with this identifier to the access network. The access network determines a piece of information on the geographical position of the terminal. A consistency check is performed between the piece of position information of the terminal determined by the access network and the piece of position information present in the table. The table is updated based on the consistency check.

Abstract: A method for geolocating a terminal of a wireless communication system. A set of reference elements is determined with the aid of messages transmitted by calibration terminals during a calibration phase. Each reference element includes a radio signature and a geographical position of a calibration terminal when a message is transmitted. A refinement phase makes it possible to clean and/or to enrich the set of reference elements by virtue of the identification of points of interest corresponding to preferential positions of transmission of messages by the terminals. During a search phase, the position of a terminal of interest is determined based on its radio signature and of the modified set of reference elements.

Abstract: A method for transmitting a broadcasting message by an access network intended for a group of terminals. The terminals are configured to recurrently and asynchronously transmit polling messages intended for the access network. An instant for transmitting the broadcasting message is determined on the basis of information relating to the recurrence of the polling messages transmitted by the terminals of the group. Before transmitting the broadcasting message and for each polling message received from a terminal of the group, a response message including one or more parameters relating to the transmission of the broadcasting message is transmitted. The response message needs to be received by the terminal during a listening window with a predetermined duration following the transmission of the polling message. The broadcasting message is transmitted over the broadcasting channel at the determined transmission instant.