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Interoperability, why it is important

FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009). Interoperability, why it is important. Dr. Ghassem Koleyni. Content. Business approach to products and standardization Open standards Interworking and interoperability What makes networks not to interoperate?

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Interoperability, why it is important

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  1. FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009) Interoperability, why it is important Dr. Ghassem Koleyni

  2. Content Colmbo, Sri Lanka, 7-10 April 2009 Business approach to products and standardization Open standards Interworking and interoperability What makes networks not to interoperate? Functional architectures and interfaces Concluding remark

  3. Business approach to products and standardization Colmbo, Sri Lanka, 7-10 April 2009 Business case study • Standardization • Problem analysis • Requirement analysis • architecture • Implementation • Pilot project • Full product Deployment

  4. Open standards (I) Colmbo, Sri Lanka, 7-10 April 2009 • Open standards are developed and maintained in a transparent way through participation and collaboration of many organizations, vendors and operators. Open standards consider: • User, business and technical requirements • Multi-service, multi-network and multi-vendor environments • Reuse or integration of existing open standards to the extent practicable

  5. Open standards (II) Colmbo, Sri Lanka, 7-10 April 2009 What is interoperability? • Implementation based on open standards is a major component to support the market • Having interoperable system makes sense and is a good marketing and business strategy

  6. Colmbo, Sri Lanka, 7-10 April 2009 Recognizing that interoperability of international telecommunication networks was the main reason to create ITU in the year 1865 (International Telegraph Union), and that this remains one of the main goals in the ITU strategic plan; ITU-T Resolution 76

  7. Interworking and interoperability Colmbo, Sri Lanka, 7-10 April 2009 Is interworking the same as interoperability? No Let’s see why

  8. Interworking (I) Colmbo, Sri Lanka, 7-10 April 2009 The term ''interworking'' is used to express interactions between networks, between end systems, or between parts thereof, with the aim of providing a functional entity capable of supporting an end-to-end communication. The interactions required to provide a functional entity rely on functions and on the means to select these functions. Source: ITU-T Rec. Y.1411 Note: In ITU-T Rec. I.741 term “Interconnection” is used which when examined is the same as interworking

  9. Interworking (II) Colmbo, Sri Lanka, 7-10 April 2009 Network A Inter-working function Network B Inter-working function Network C

  10. Interworking example Colmbo, Sri Lanka, 7-10 April 2009 ATM IWF MPLS IWF ATM VC/VP MPLS LSP VC/VP Upper Layers Upper Layers AAL AAL IWF IWF MPLS MPLS MPLS MPLS LSP LSP LSP LSP ATM ATM ATM ATM Stacks Stacks Stacks Stacks Link Layer Link Layer Link Layer Link Layer Physical Physical Physical Physical Physical Physical Physical Physical Y.1411_F02

  11. Colmbo, Sri Lanka, 7-10 April 2009 Interoperability The ability of two or more systems or applications to exchange information and to mutually use the information that has been exchanged. Source: ITU-T Rec. Y.101 Network A Network B

  12. Colmbo, Sri Lanka, 7-10 April 2009

  13. Colmbo, Sri Lanka, 7-10 April 2009

  14. What makes networks un-interoperable? Colmbo, Sri Lanka, 7-10 April 2009 Lack of interoperability happens when two networks which are implemented based on the same standards (functionally equivalent) can’t talk to each other; or When two networks (again functionally equivalent) which are to provide similar services are based on two different standards (e.g. one has been implemented based on a proprietary specification and another one based on a global standard

  15. What is the solution? Colmbo, Sri Lanka, 7-10 April 2009 Compliance to global standards But Does everyone comply? Simply no

  16. NGN Generalized functional architecture Colmbo, Sri Lanka, 7-10 April 2009 Source: ITU-T Rec. Q.3030

  17. Colmbo, Sri Lanka, 7-10 April 2009 Reference points in IPTV functional architecture

  18. Functional architectures and interfaces Colmbo, Sri Lanka, 7-10 April 2009 ITU-T has produced Recommendations which provide signalling and control procedures for protocols passing through open interfaces Both NGN and IPTV functional architectures clearly identify open interfaces and specify signalling protocols which pass through them To be interoperable means all devices built based on the same standard have the same behaviour at the same reference point

  19. ITU and interoperability Colmbo, Sri Lanka, 7-10 April 2009 • ITU-T resolution 76 indicates: • ITU-T study groups develop the necessary conformance testing Recommendations for telecommunication equipment as soon as possible; • ITU-T Recommendations to address interoperability testing shall be progressed as quickly as possible; and • Assist developing countries in establishing regional or sub-regional conformity and interoperability centres suitable to perform conformity and interoperability testing as appropriate.

  20. Interoperability, standards and conformance (I) Colmbo, Sri Lanka, 7-10 April 2009 Open standards are designed based on common agreement; however, they don’t guarantee interoperability Verification, conformance and compliance testing should be an integral part of standardization process Regulatory bodies should encourage and make sure that deployed devices are interoperable

  21. Interoperability, standards and conformance (II) Colmbo, Sri Lanka, 7-10 April 2009 • Reference points and protocols going through them are the most important players for interoperability • Test suites should be provided to verify conformance • Certified organizations to perform conformance testing are needed • Would be ideal to have these organizations in different regions

  22. Conclusion Colmbo, Sri Lanka, 7-10 April 2009 • In general, implementations based on global standards should be interoperable • But this may not be true unless tested and certified by reputable organizations • When procuring NGN or IPTV devices, care should be taken to assure interoperability • i.e. products are implemented based on an open standard and backed up by certification from a reputable organization

  23. Conclusion (II) Colmbo, Sri Lanka, 7-10 April 2009 Procuring devices compliant to global standards will help ensure interoperability • ITU-T considers support of interoperable devices a major component of its activities • ITU-T reuses open and global standards • Increases chance of interoperability • May reduce implementation cost

  24. List of Acronyms Colombo, Sri Lanka, 7-10 April 2009 • AAL ATM Adaptation Layer • ATM Asynchronous Transfer Mode • IWF Interworking Function • IPTV Internet Protocol Television • LSP Label Switched Path • MPLS Multi-Protocol Label Switching • NGN Next Generation Network • QoS Quality of Service • Rec. Recommendation • RFID Radio Frequency IDentification • USN Ubiquitous Sensor Network • VC Virtual Channel • VP Virtual Path

  25. Colmbo, Sri Lanka, 7-10 April 2009 Thank you for your attention Dr. Ghassem Koleyni Email: ghassem@rogers.com Tel: +1 613 592 5344

  26. Colmbo, Sri Lanka, 7-10 April 2009 Backup slides

  27. ITU-T actions for support of interoperability Colombo, Sri Lanka, 7-10 April 2009 • Creation of one working party in SG 11 for test specifications • Q.8/11: Protocol Test Specifications for NGN  • Q.9/11: Monitoring parameters for NGN protocols  • Q.10/11: Service test specification for NGN • Q.11/11: QoS tests specification for NGN  • Q.12/11: USN and RFID test specification

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