| 摘要 |
The present invention contemplates a variety of techniques for delivering advertisements and similar promotional messages to mobile users through the Unstructured Supplementary Service Data (USSD) bearer in the GSM (Global System for Mobile) network or the 3G (3<SUP>rd </SUP>Generation) network. The USSD is a GSM and 3G communication technology that is used to send text between a mobile phone and an application program in the network. USSD provides session-based communication in which transactions occur only during a session. Advertisements delivered through USSD provide a way for the recipient to respond to the promotional message immediately and often at no cost, as many mobile networks do not bill mobile users for their USSD traffic. The present invention allows advertisements to be delivered through USSD in several ways: by inserting a short text into a message in a mobile-initiated USSD session, by temporarily diverting a mobile-initiated USSD session toward an advertisement sub-session, by triggering a network-initiated USSD session the main purpose of which is the delivery of an advertisement, and by causing a mobile user to initiate a USSD session the main purpose of which is the delivery of an advertisement. The present invention discloses a process for inserting advertisements into USSD messages, a process for inserting advertisement sub-sessions into USSD sessions, and a process for delivering advertisements with network-initiated USSD sessions.
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