REAL-TIME METHOD AND SYSTEM FOR CONTROLLING AND TARIFFING MOBILE SERVICES FOR ROAMING CUSTOMERS

摘要

The system includes mobile terminals with a SIM card designed to intercept outgoing call attempts and to generate a random number (RAND) for each intercepted outgoing call attempt in order to transmit same in a USSD request to an intelligent network node (IN-Pre) which generates a register containing the calling number and the called number, labelling same with the random number (RAND). The SIM card establishes the call to a destination number formed by a network prefix and the random number (RAND). The system also includes an intelligent network node (IN-Pre) belonging to the originating network (HPMN) with which the mobile terminal is connected from the visited network (VPMN), which intelligent network node includes a credit control logic (CCL) for prepaid calls and a logic responsible for correlating the USSD request with an identifier for triggering the intelligent network at the random number (RAND) supplied by the card.