Patent ID: 7310510
Filing Date: 2007-12-18
Classification: H04L,H04M,H04W

Abstract:
1. A method for ascertaining a billing tariff for billing for a data transfer, where a mobile communication terminal which is involved in the data transfer and has access rights for a data mobile radio network is situated in a visitor mobile radio network, comprising: setting up a data tunnel, used for transferring the data, from the communication terminal to a network gateway node in the data mobile radio network prompting transfer of an item of location information which relates to the communication terminal from a switching center, temporarily associated with the communication terminal, in the visitor mobile radio network to the network gateway node in the data mobile radio network; transferring the item of location information to a billing system; using the item of location information to establish that the communication terminal is situated in the visitor mobile radio network; and ascertaining a billing tariff associated with the visitor mobile radio network, wherein the method is initiated by the visitor mobile radio network receiving a request message from the communication terminal which relates to the data transfer, a request is sent from the visitor mobile radio network to the central data store regarding the data mobile radio network for which the communication terminal has access rights, the data tunnel is set up to the network gateway node in the data mobile radio network, the network gateway node transfers the item of location information to an authentication server in the data mobile radio network using an authentication message, and the authentication message is taken as a basis for transferring the item of location information to a service computer gateway.