Patent ID: 7389105
Filing Date: 2008-06-17
Classification: H04M,H04W

Abstract:
1. A method for billing in a packet data network comprising at least one user's terminal for accessing the packet data network, the terminal including a subscriber identity module corresponding to a telecommunications network subscription to a telecommunications network, wherein the telecommunications network is external to the packet data network and comprises an accounting server and the at least one user's terminal is operating in one of a home and a roaming mode, comprising: forming a data link between the terminal and the packet data network; requesting by the packet data network, a user identity from the terminal; obtaining by the terminal the user identity from the subscriber identity module; indicating by the terminal the user identity to the packet data network; generating by the packet data network, billing data based on the user identity; and sending the billing data from the packet data network to the accounting server of the external telecommunications network, generating a billing code corresponding to a price of accessing the packet data network; generating a cryptographic checksum using at least the billing code; and using the cryptographic checksum in a billing set up to verify that the user is provided with a correct price and that the user has accepted the access for that correct price.