A method for transmitting a presence map of mobile terminals connected via a communication session to a mobile network covering a plurality of location areas. The method includes: obtaining information relating to existence of at least one special area from among the plurality of location areas and with which a special session-processing rule is associated; iteratively updating a presence map associating location area identifiers with terminal identifiers, including: collecting location information of a terminal, including a location area identifier of the terminal; searching the area information for existence of a special area that corresponds to the location area; and, when the special area exists, adding the terminal identifier and the location area identifier to the terminal presence map; and transmitting the terminal presence map to a device of the mobile network capable of applying a session-processing rule to a terminal in accordance with at least the location area thereof.