Future mobile networks: ad-hoc access based on online payment with smartcards

This paper describes an architecture where access to heterogeneous mobile networks is granted on the basis of online payment using smartcards. Access methods for GSM networks were designed for subscribed post-pay customers. With IN (intelligent networks) technology, operators could also offer services to prepay customers. Now, online payment might provide additional means for network access. In particular, a smartcard containing money tokens can be used. Then the network operator plays the role of a merchant. We suggest an IP based architecture which uses a diameter application for cost control and a charging component for online payment.