1. AIMS Workshop Heidelberg, 9-11 March 1998 P717 & P805: SIRTE Study for Internet Roaming Throughout Europe Franco Guadagni - Telecom Italia / CSELT guadagni@cselt.it

2. AIMS Workshop Heidelberg, 9-11 March 1998 AGENDA Scope Objectives Technical approach P717 results P805 expected results

3. AIMS Workshop Heidelberg, 9-11 March 1998 Scope Narrow, focused scope No IP number roaming No terminal roaming No “mobile IP” issues Simple “ISP roaming” addressed: Avoid international modem calls when abroad

4. AIMS Workshop Heidelberg, 9-11 March 1998 Model Multiple ISPs in each country Problem similar to GSM roaming Same model for roaming solution Based on bilateral agreements between parties No central clearing point Distributed solution: Scaleable and robust

5. AIMS Workshop Heidelberg, 9-11 March 1998 Existing solutions Problem already addressed, solutions exist. Single ISP solution: –based on “global” ISPs –limited choice –cost problems only partially solved Trusted Third Party solution (e.g.. I-PASS) –based on centralized architecture –need to pay the clearing agency

6. AIMS Workshop Heidelberg, 9-11 March 1998 AAA: how does it work PSTN/ISDN network IP network AAA server NAS C/N interface e.g. PPP C/A interface e.g. RADIUS

7. AIMS Workshop Heidelberg, 9-11 March 1998 roaming: how should it work PSTN/ISDN network IP network AAAS (ISP R) NAS (ISP R) C/N N/A AAAS (ISP H) A-A interface e.g based on HTTP

8. AIMS Workshop Heidelberg, 9-11 March 1998 P717: Objectives, results study current situation report on existing solutions define architectural model for EURESCOM roaming identify requirements draw possible alternatives for a EURESCOM solution identify work to be done on the different topics experiment international PSTN and ISDN Internet access between project partners

9. AIMS Workshop Heidelberg, 9-11 March 1998 requirements terminal-network interface: –should work for PSTN and ISDN –should work for most common devices and configs network-network interface (A-A protocol) –should allow transport of all necessary parameters –should be secure (encryption, mutual validation) –should run over IP Compatible with existing third party solutions!

10. AIMS Workshop Heidelberg, 9-11 March 1998 P805: objectives, priorities concentrate on A-A protocol definition choice between RADIUS, HTTP, LDAP define protocol parameters and procedures implement a demonstrator of the selected solution for the A-A protocol implement a simple solution for the user roaming software (to demonstrate feasibility)

11. AIMS Workshop Heidelberg, 9-11 March 1998 Timetable spring: choose protocol summer: detailed protocol specification fall: implement prototype solution, refine protocol definition winter: demonstrate SIRTE roaming solution between two or more project partners.

12. AIMS Workshop Heidelberg, 9-11 March 1998 We’re not alone! Work together with IETF Roamops group input our ideas and proposals to the IETF standardisation process

13. AIMS Workshop Heidelberg, 9-11 March 1998 We shouldn’t say We’re too late –if we keep saying this, it will always be true It’s not worth the effort –True only if the Internet market stops growing Solutions are already available –SIRTE and commercial solutions are not mutually exclusive –the more roaming users we have, the more money we give to the clearing agency

14. AIMS Workshop Heidelberg, 9-11 March 1998 We need: Commitment, specific know-how and enthusiasm of project partners Strong liaisons with IETF group working on roaming Strong liaisons with ISPs within partners

15. AIMS Workshop Heidelberg, 9-11 March 1998 What if we succeed? If we design a working solution for A-A protocol, there’s still much more to do: –set up a framework to make real ISP cooperation possible (e.g. POP common distributed database) –design a nice and simple client for easy roaming access –define a technical framework for ISP to ISP agreements There’s still room for cooperation projects!