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Both the Internet and the telco-world have evolved their own identity solutions, protocols and frameworks, because they have grown separately. On the way from the Plain Old Telephony System (POTS) to the Next Generation Network (NGN) the telco community developed and standardized the IP Multimedia Subsystem (IMS) as a framework to describe the implementation of telco services based on the Internet Protocol (IP). Although IMS standards foresee the development of advanced identity mechanisms, they still specify a separated and rather closed world. Therefore, interoperability between the Internet and IMS is still an issue and there is a growing need for inter-working. Telcos develop Application Programming Interfaces (APIs) to offer their assets to the Web community or to a 3rd party service provider. Furthermore, they implement complex service scenarios containing Internet and telco elements. This paper wil explain primarily how Liberty based protocl can be of use in the IMS context |
This paper written in collaboration with Ingo Friese (Deutsche Telekom), Jonas Högberg (Ericsson), Mario Lischka (NEC), Gaël Gourmelen (Orange) & Joni Brennan (IEEE-ISTO)
PDF version of the paper (here)
