E-charging API: outsource charging to a payment service provider

This presentation is about charging for content or application usage. We propose a new API (application programming interface) that allows content servers or application hosts to delegate the charging process to a payment service provider. The new API: 1) does not depend on the type of the application to be charged, 2) does not care about when and how the customer is billed, 3) is able to support prepaid as well as postpaid customers, and 4) is designed to be carried by the public Internet.