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Migration Towards Converged Networks Dr. Ghassem Koleyni FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009) Colombo, Sri Lanka,

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Presentation on theme: "Migration Towards Converged Networks Dr. Ghassem Koleyni FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009) Colombo, Sri Lanka,"— Presentation transcript:

1 Migration Towards Converged Networks Dr. Ghassem Koleyni FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009) Colombo, Sri Lanka, 7-10 April 2009

2 Content Telecommunications network Network evolution Needs and expectations What is NGN? PSTN & ISDN evolution to NGN Standardization activities Conclusion Colmbo, Sri Lanka, 7-10 April

3 Telecommunications Network Colmbo, Sri Lanka, 7-10 April Core Network Home Network Network AccessNetwork Access Network Home Network Network

4 Network Evolution IP: Mid to late 1970s (No QoS guaranteed) Ethernet: at Xerox ISDN: Mid to late 1980s (QoS guaranteed while increasing the bandwidth, many new services ) X.25: Mid to late 1980s (transmission of data without loss nor duplication) FR: Mid to late 1980s (QoS guaranteed while increasing the bandwidth) ATM: Early 1990s (guaranteed QoS, increased bandwidth, combined switching and transport capability with high level of performance and scalability) Colmbo, Sri Lanka, 7-10 April

5 Vertically-Integrated Networks Colmbo, Sri Lanka, 7-10 April Voice Services Voice Services Network Data Services Data Services Network Video Services Video Services Network

6 Expectations (I) Reduced expenses Fewer core switches and transit exchanges Reduced CAPEX & OPEX Faster return on investment Increased network efficiency and utilisation Reduced deployment time Fast and open service creation platform One-stop shop for billing A set of management functions shared between different services Open services architecture Colmbo, Sri Lanka, 7-10 April

7 Expectations (II) Interoperable networks Standardized interfaces and protocols Faster service deployment Multimedia services support Guaranteed QoS and QoS differentiation Access agnostic (copper, cable, fibre, wireless) Service continuity between fixed and mobile Terminal portability Increased bandwidth availability Secure, reliable and simple ( Secure, reliable and simple (ease of use) Affordable Colmbo, Sri Lanka, 7-10 April

8 The Evolution Trend Colmbo, Sri Lanka, 7-10 April Switching Services Transmission Interfaces Circuit- switched Telephone services TDM based Proprietary Packet- switched Multimedia services SDH, PDH, etc.Standardized

9 Colmbo, Sri Lanka, 7-10 April NGN standardization in ITU-T

10 Chronology of NGN Standardization in ITU-T First workshop on NGN in ITU-T convened in Geneva, 9-10 July 2003 Meeting convened with cooperation from SGs 11, 13, 16 and SSG (predecessor to SG 19) Presentations from different interest groups SG 13 was tasked to lead study group on NGN First JRG-NGN meeting, 29 September to 2 October 2003 Four draft Recommendations were generated NGN Focus Group was formed in May 2004 Study Group 13 (NGN SG) established by WTSA-04 as the lead SG for NGN studies NGN-GSI started in 2006 and is continuing Colmbo, Sri Lanka, 7-10 April

11 Next Generation Network (NGN) Colmbo, Sri Lanka, 7-10 April 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. Source: ITU-T RecommendationY.2001

12 Different aspects of NGN (I) Packet-based transfer Separation of control functions among bearer capabilities, call/session, and application/service Decoupling of service provision from transport, and provision of open interfaces Support for a wide range of services, applications and mechanisms based on service building blocks (including real time/streaming/non-real time services and multi-media) Colmbo, Sri Lanka, 7-10 April

13 Different aspects of NGN (II) Broadband capabilities with end-to-end QoS and transparency Interworking with legacy networks via open interfaces Generalised mobility Unfettered access by users to different service providers A variety of identification schemes which can be resolved to IP addresses for the purposes of routing in IP networks Colmbo, Sri Lanka, 7-10 April

14 Different aspects of NGN (III) Unified service characteristics for the same service as perceived by the user Converged services between Fixed and Mobile networks Independence of service-related functions from underlying transport technologies Support of multiple last mile technologies Compliant with all Regulatory requirements, for example concerning emergency communications and security/privacy Colmbo, Sri Lanka, 7-10 April

15 In Brief Colmbo, Sri Lanka, 7-10 April Simplicity Increased productivity Increase customer satisfaction Increased revenue Simplicity Increased productivity Increase customer satisfaction Increased revenue NGN, a single network providing services agnostic to the underlying transmission technologies and through different access networks NGN, a single network providing services agnostic to the underlying transmission technologies and through different access networks

16 Horizontally Integrated Network Colmbo, Sri Lanka, 7-10 April NGN Services Stratum User plane Control Management plane NGN Transport Stratum User plane Control Management plane NGN Basic Reference Model (NGN BRM )

17 Separation of Services from Transport in NGN Colmbo, Sri Lanka, 7-10 April NGN transport NGN services e.g., voice telephony services (audio, fax, etc.) e.g., Data services (WWW, , etc.) e.g., Video services (TV, movie, etc.) CO-CS, CO-PS and CLPS layer technologies

18 General NGN Functional Model Colmbo, Sri Lanka, 7-10 April R e s o u r c e s Services Service control functions Service management functions Infrastructural, application, middleware and baseware services NGN Service NGN Transport Transfer functional area Resources Transport management functions Transport control functions

19 Colmbo, Sri Lanka, 7-10 April Other Networks Service Control Functions Transport stratum Service stratum Control Media Management Functions Management Service User Profiles Transport User Profiles ANI End-User Functions Transport Control Functions Resource and Admission Control Functions Network Attachment Control Functions Transport Functions NNI UNI Application Support Functions & Service Support Functions Applications

20 Re-distribution of Service Intelligence Colmbo, Sri Lanka, 7-10 April Migration of Service Intelligence User Core Access User Access

21 Colmbo, Sri Lanka, 7-10 April PSTN & ISDN Evolution to NGN

22 What to consider when evolving PSTN/ISDN to NGN Colmbo, Sri Lanka, 7-10 April Transport Signalling and control Management Services Bearer services Supplementary services Operation, administration and maintenance (OAM) Naming, numbering and addressing Accounting, charging and billing Inter-working National regulations Emergency telecommunications Security aspects

23 Different Approaches Call server (CS)-based Equipment re-use Service continuity IP multimedia sub-system (IMS)-based Immediate migration Access to new services Colmbo, Sri Lanka, 7-10 April

24 NGN: CS-based Colmbo, Sri Lanka, 7-10 April PSTN Packet Switched Network signalling AN PABX Call Server Private Lines Wireless ISDN Cable, IAD, xDSL

25 Example of PSTN/ISDN Evolution Colmbo, Sri Lanka, 7-10 April

26 NGN: IMS-based Colmbo, Sri Lanka, 7-10 April Packet Switched Network Other networks IMS Other networks signalling

27 PSTN/ISDN Emulation & Simulation Colmbo, Sri Lanka, 7-10 April PSTN/ISDN emulation Provides PSTN/ISDN service capabilities and interfaces using adaptation to an IP infrastructure. PSTN/ISDN simulation Provides PSTN/ISDN-like service capabilities using session control over IP interfaces and infrastructure.

28 Colmbo, Sri Lanka, 7-10 April Emulation, Simulation, Interoperability and Interworking with NGN NGN (Carrier X) NGN (Carrier Y) PLMN PSTN/ISDN Public IP NETWORK User Equipment SIMULATION EMULATION NNI UNI NNI UNI User Equipment

29 Evolution Strategy Colmbo, Sri Lanka, 7-10 April Transition cost Business model Customer expectation Are customers ready for changes? If higher expenses are involved, are customerst ready to pay? Choice of technology Products and services to be offered Domestic regulations

30 NGN Recommendations, Y Series Colmbo, Sri Lanka, 7-10 April Frameworks and functional architecture models Y.2000–Y.2099 Quality of Service and performance Y.2100–Y.2199 Service aspects: Service capabilities and service architecture Y.2200–Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250–Y.2299 Numbering, naming and addressing Y.2300–Y.2399 Network management Y.2400–Y.2499 Network control architectures and protocols Y.2500–Y.2599 Security Y.2700–Y.2799 Generalized mobility Y.2800–Y.2899

31 NGN Recommendations, Q Series Colmbo, Sri Lanka, 7-10 April General Q.3000–Q.3029 Network signalling and control functional architecture Q.3030–Q.3099 Network data organization within the NGN Q.3100–Q.3129 Bearer control signalling Q.3130–Q.3179 Signalling and control requirements and protocols to support attachment in NGN environments Q.3200–Q.3249 Resource control protocols Q.3300–Q.3369 Service and session control protocols Q.3400–Q.3499 Service and session control protocols – supplementary services Q.3600–Q.3649 NGN applications Q.3700–Q.3849 Testing for NGN networks Q.3900–Q.3999

32 Conclusion Colmbo, Sri Lanka, 7-10 April Substantial progress has been made in the preparation of specifications addressing evolution of networks to NGN Good progress on signalling and protocol work More work needs to be done, specifically on the OAM, management and control & signalling aspects Compliance to global standards would reduce procurement costs and promote inter-operability

33 List of Acronyms ) Colmbo, Sri Lanka, 7-10 April ADFAdaptation Function AGAccess Gateway ANAccess Network ANIApplication Network Interface ATMAsynchronous Transfer Mode CAPEX CAPital EXpenditure CO-CSconnection-oriented circuit- switched CO-PSconnection-oriented packet-switched CLPSconnectionless packet- switched CSCall Server DSLDigital Subscriber Line DTEData Terminal Equipment FRFrame Relay IAD Integrated Access Device IMSIP Multimedia Sub-system IPInternet Protocol ISDNIntegrated Services Digital Network IWFInter-working Function LELocal Exchange NGNNext Generation Network NNINetwork Network Interface OAMOperation, Administration, Maintenance OPEX OPerating EXpenditure PABXPrivate Automatic Branch eXchange PBXPrivate Branch eXchange PDHPlesiochronous Digital Hierarchy PLMNPublic Land Mobile Network PSPDNPacket Switched Public Data Network PSTNPublic Switched Telephone Network QoSQuality of Service REVReverse Charging SDHSynchronous Digital Hierarchy SGSignalling Gateway SIPSession Initiation Protocol TDMTime Division Multiplexing TETransit Exchange TMGTrunking Media Gateway TVTelevision UAMUser Access Module UNIUser-Network Interface WWWWorld Wide Web

34 Thank you for your attention Colmbo, Sri Lanka, 7-10 April Dr. Ghassem Koleyni Tel:

35 Colmbo, Sri Lanka, 7-10 April Back up slides

36 ITU-T NGN Related Recommendations (Q Series) Colmbo, Sri Lanka, 7-10 April Q.3030 Signalling architecture for the NGN service control plane Q.3150 Use of virtual trunks for ATM/MPLS client/server control plane interworking Q.3151 ATM and frame relay/MPLS control plane interworking: Client- server Q.3201 EAP-based security signalling protocol architecture for network attachments Q Authentication protocols based on EAP-AKA for interworking among 3GPP, WiMax, and WLAN in NGN Q.3300 Architectural framework for the Q.33xx series of Recommendations Q Resource control protocol - Protocol at the Rs interface Q Resource control protocol - Protocol at the Rp interface

37 ITU-T NGN Related Recommendations (Q Series) Colmbo, Sri Lanka, 7-10 April Q Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE) (Rw interface): Overview Q Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE): COPS Alternative Q Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE) (Rw interface): H.248 Alternative Q Protocol at the interface between the policy decision physical entity (PD-PE) and the policy enforcement physical entity (PE-PE) (Rw interface): Diameter Q Resource control protocol no. 4 (rcp4). Protocol at the interface between a transport resource control physical entity (TRC-PE) and a transport physical entity (T-PE) (Rc interface): COPS alternative

38 ITU-T NGN Related Recommendations (Q Series) Colmbo, Sri Lanka, 7-10 April Q Resource control protocol no. 4 SNMP Profile. Protocol at the Rc interface between a transport resource control physical entity (TRC-PE) and a transport physical entity (T-PE) (Rc interface) Q Resource control protocol - Protocol at the Rt interface Q.3401 NGN NNI signalling profile Q.3402 NGN UNI signalling profile (Protocol set 1) Q.3900 Methods of testing and model network architecture for NGN technical means testing as applied to public telecommunication networks Q.3901 Distribution of tests and services for NGN technical means testing in the model and operator networks Q.3902 Parameters to be monitored in the process of operation when implementing NGN technical means in public telecommunication networks

39 ITU-T NGN Related Recommendations (Y Series) Colmbo, Sri Lanka, 7-10 April Y.2001 General overview of NGN Y.2011 General principles and general reference model for Next Generation Networks Y.2012 Functional requirements and architecture of the NGN Y.2014 Network attachment control functions in next generation networks Y.2015 General requirements for ID/locator separation in NGN Y.2021 IMS for Next Generation Networks Y.2031 PSTN/ISDN emulation architecture Y.2051 General overview of IPv6-based NGN Y.2052 Framework of multi-homing in IPv6-based NGN Y.2053 Functional requirements for IPv6 migration in NGN Y.2054 Framework to support signalling for IPv6-based NGN Y.2091 Terms and definitions for Next Generation Networks Y.2111 Resource and admission control functions in Next Generation Networks

40 ITU-T NGN Related Recommendations (Y Series) Colmbo, Sri Lanka, 7-10 April Y.2112 A QoS control architecture for Ethernet-based IP access network Y.2113 Ethernet QoS control for next generation networks Y.2121 Requirements for the support of flow state aware transport technology in an NGN Y.2171 Admission control priority levels in Next Generation Networks Y.2172 Service restoration priority levels in Next Generation Networks Y.2173 Management of performance measurement for NGN Y.2174 Distributed RACF architecture for MPLS networks Y.2201 NGN release 1 requirements Y.2211 IMS-based real time conversational multimedia services over NGN Y.2212 Requirements of managed delivery services Y.2213 NGN service requirements and capabilities for network aspects of applications and services using tag-based identification Y.2232 NGN convergence service model and scenario using Web Services

41 ITU-T NGN Related Recommendations (Y Series) Colmbo, Sri Lanka, 7-10 April Y.2233 Requirements and framework allowing accounting and charging capabilities in NGN Y.2234 Open service environment capabilities for NGN Y.2235 Converged web-browsing service scenarios in NGN Y.2261 PSTN/ISDN evolution to NGN Y.2262 PSTN/ISDN emulation and simulation Y.2271 Call server based PSTN/ISDN emulation Y.2401 Principles for the Management of the Next Generation Networks Y.2601 Fundamental characteristics and requirements of future packet based networks Y.2611 High level architecture of future packet based networks Y.2701 Security requirements for NGN release 1 Y.2801 Mobility management requirements for NGN Y.2802 Fixed-mobile convergence general requirements Y.2803 FMC service using legacy PSTN or ISDN as the fixed access network for mobile network users Y.2804 Generic framework of mobility management for next generation networks

42 Useful Links ITU NGN Global Standards Initiative (NGN-GSI) SG11 (Signalling & Control Protocols) T/studygroups/com11/index.asp SG 13 (Future Networks and NGN) T/studygroups/com13/index.asp Colmbo, Sri Lanka, 7-10 April


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