Patent ID: 11956634
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by user equipment belonging to a home network to access data communication services in a visited network of a wireless communication system, the method comprising:
obtaining at least one cryptographic token originating from a network node of the home network of the user equipment and cryptographically signed by a private key associated with the home network, the at least one cryptographic token being usable for accessing data communication services via user data transport functions of the visited network and representing at least one of a predetermined or maximum data consumption limit, and a price range limitation;
cryptographically signing the obtained and signed token by a private key associated with the user equipment to generate a double-signed token; and
sending the double-signed token to a network node of the visited network for enabling the user equipment to access data communication services via the user data transport functions of the visited network.