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

Claim 9:
10. A method performed by a network node to enable a user equipment belonging to a home network to access data communication services in a visited network of a wireless communication system, the method comprising:
issuing, to the user equipment, at least one cryptographic token 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 cryptographic token by a private key associated with the home network; and
sending the signed token to the user equipment and requesting the user equipment to cryptographically sign the signed token by a private key associated with the user equipment to generate a double-signed token for enabling the user equipment to access data communication services via the user data transport functions of the visited network when presenting the double-signed token to a network node of the visited network.