1. Colombo, Sri Lanka, 7-10 April 2009 Developing Physical Architecture of NGN- a methodology R. K. Siddhartha Director, Dept. of Telecommunications, INDIA FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009)

2. Colombo, Sri Lanka, 7-10 April 2009 2 NGN - Interoperability is crucial “A packet based network able to provide telecommunication services and able to make use of multiple broadband, QoS-enabled transport technologies and in which service related functions are independent from underlying transport related technologies. It enables unfettered access for users to networks and to competing service providers and/or services of their choice. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users” -Ref. ITU-T Y.2001

3. Colombo, Sri Lanka, 7-10 April 2009 3 ITU mark program a Catalyst for Interoperability standards in ITU Recommendations - intrinsic interoperability in standards Can be feedback mechanism for fixing up standards for including attributes of interoperability Boost to indigenization of the Telecom Equipments Enhance Knowledge creation process Increase Competitiveness

4. Colombo, Sri Lanka, 7-10 April 2009 4 Resolution 76 that providing for interoperability should be the ultimate aim of future ITU-T Recommendations Considered : the difficulties of equipment level interoperability Noted : need to assist developing countries in facilitating solutions which will exhibit interoperability and reduce the cost of systems and equipment procurement by operators Instructed : Study Groups to identify ITU recommendations in light of interoperability

5. Colombo, Sri Lanka, 7-10 April 2009 5 Paradigm Shift ! Resolution 76 Physical Entity ITU Mark Equipment testing

6. Colombo, Sri Lanka, 7-10 April 2009 6 Functional Architecture [Ref. ITU-T Y.2012]

7. Colombo, Sri Lanka, 7-10 April 2009 7 Need for Physical Architecture Physical architecture will decrease interoperability risk Achieving seamless interoperability at the basic- level is crucial Functional architecture is for Implementers/ developers not for Operators & N/W designers Modular Architecture- -Implementation/ Deployment ease -Vendor independence -Optimize investment

8. Colombo, Sri Lanka, 7-10 April 2009 8 Functional Entities [Ref. ITU-T Y.2012] S-1: Serving call Session control FE S-13: Media Resource Control FE S-6: S Authentication & authorisation FE Application support functions & service support function S-14: Media Resource broker FE S-5: Service user profile FE

9. Colombo, Sri Lanka, 7-10 April 2009 9 Reference Points & Interfaces Ref. points (Service control functions) SIP S-1 (S-CSC-FE) - S-13 (MRC-FE) -----------------SIP Diameter S-1 (S-CSC-FE) - S-5(SUP-FE), S-6(SAA-FE)---- Diameter Reference points (ASF/SSF) SIP S-1 (S-CSC-FE) - ASF/SSF---------SIP Diameter S-5 (SUP-FE) - ASF/SSF------------Diameter Diameter S-6 (SAA-FE) – ASF/SSF-----------Diameter SIP, HTTP, VoiceXML, S-13 (MRC-FE) – ASF/SSF---------SIP, HTTP, VoiceXML, MSCML MSCML SIP, HTTP, SOAP S-14 (MRB-FE) – ASF/SSF---------SIP, HTTP, SOAP

10. Colombo, Sri Lanka, 7-10 April 2009 10 Functional Entities-Physical Entities S-1: Serving call session control FE (S- CSC-FE) S-5: Service user profile FE (SUP-FE) S-6: Service authentication & authorisation FE (SAA- FE) S-13: Media resource control FE (MRC-FE) S-14: Media Resource broker FE (MRB-FE) Application support functions and service support functions Proxy & Registrar Server Home Subscriber Server (HSS) Media Server Application Server

11. Colombo, Sri Lanka, 7-10 April 2009 11 A Section of Possible Physical Architecture of NGN for Interop IOPt I IOPt III IOPt II To other Physical Entities Of NGN Network To other Physical Entities of NGN network Home Subscriber Server Application Server Proxy & Registrar Server Media Server

12. Colombo, Sri Lanka, 7-10 April 2009 12 Interop Req. for Application Server Total of Three Interfaces IOPt for Application Server + + = IOPt I IOPt II IOPt III

13. Colombo, Sri Lanka, 7-10 April 2009 13 Vertical Cut Protocols IOPt PHY --- API

14. Colombo, Sri Lanka, 7-10 April 2009 14 Types of Application Server towards network Using OSA towards network Using CAMEL SIP AS OSA-SCSIM-SSF

15. Colombo, Sri Lanka, 7-10 April 2009 15 Y.phy_arch_ngn “Architectural realizations and open interfaces in NGN” Recommendation for Interoperability Basic Physical architecture showing physical elements of NGN Open interfaces are spelled for each element

16. Colombo, Sri Lanka, 7-10 April 2009 16 Proposed Structure Y.phy_arch_ngn Four tier document Each protocol dressed up for Interoperability Each Interface with vertical cut layers Each element defined for Interoperability Physical Architecture of NGN

17. Colombo, Sri Lanka, 7-10 April 2009 17 ITU Mark & Y.phy-arch-ngn Can be a Seed document for Interoperability Standards & testing in NGN Target – 50% of elements of NGN are standardized as physical entities it can help achieving objectives of NGN (Y. 2oo1) Digital Opportunity Index will be improved in developing countries

18. Colombo, Sri Lanka, 7-10 April 2009 18 Thank You !