Juan Antonio Sanchez Herrero

Method, system and apparatus for handling terminal capabilities

Apparatus and method for authenticating a user when accessing to multimedia services

Apparatus and method for selecting a visited network

User selector proxy, method and system for authentication, authorization and accounting

Servers and methods for controlling group management

Apparatus and Method for Differentiating Services in Multimedia Networks to Roaming Subscribers

Provision of public service identities

Method and Apparatus for Tele-Toll Payment

Automatic transfer of machine-to-machine device identifier to network-external service providers

Method and Apparatus for Associating Service Provider Network Identifiers with Access Network Identifiers