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

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

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 2009

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Telecommunications Network


3

Core NetworkCore Network

HomeHome NetworkNetwork

AccessAccessNetwoNetwo

rkrk

Access Access NetwoNetwo

rkrk

HomeHome NetworkNetwork

Network Evolution IP: Mid to late 1970’s (No QoS guaranteed) Ethernet: 1973-1975 at Xerox ISDN: Mid to late 1980’s (QoS guaranteed while

increasing the bandwidth, many new services ) X.25: Mid to late 1980’s (transmission of data

without loss nor duplication) FR: Mid to late 1980’s (QoS guaranteed while

increasing the bandwidth) ATM: Early 1990’s (guaranteed QoS, increased

bandwidth, combined switching and transport capability with high level of performance and scalability)


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Vertically-Integrated Networks


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VoiceService

s

VoiceServic

esNetwo

rk

DataService

s

DataServic

esNetwo

rk

VideoService

s

VideoServic

esNetwo

rk

Expectations (I)

Reduced expenses

Fewer core switches and transit exchanges Reduced CAPEX & OPEX

Faster return on investmentIncreased network efficiency and utilisation

Reduced deployment time

Fast and open service creation platformOne-stop shop for billing

A set of management functions shared between different services

Open services architectureColmbo, Sri Lanka, 7-10 April 2009

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Expectations (II)

Interoperable networksStandardized 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


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The Evolution Trend


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Switching

Services

Transmission

Interfaces

Circuit- switched

Telephone services

TDM based

Proprietary

Packet- switched

Multimedia services

SDH, PDH, etc.

StandardizStandardizeded


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NGN standardization in ITU-T

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 groupsSG 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


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Next Generation Network (NGN)


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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

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)


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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


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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


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In Brief


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• 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

Horizontally Integrated Network


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NGN Services Stratum

User plane

ControlManagement plane

NGN Transport Stratum

User plane

ControlManagement plane

NGN Basic Reference Model (NGN BRM)

Separation of Services from Transport in NGN


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NGN transport

NGN services

e.g., voice telephony services (audio, fax, etc.)

e.g., Data services (WWW, e-mail, etc.)

e.g., Video services (TV, movie, etc.)

CO-CS, CO-PS and CLPS layer technologies

General NGN Functional Model


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Resources

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


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19

OtherNetworks

Service ControlFunctions

Transport stratum

Service stratum

ControlMedia

Man

ag

em

en

t Fu

ncti

on

s

Management

Service UserProfiles

Transport User

Profiles

ANI

End-UserFunctions

Transport Control Functions

Resource and Admission Control

Functions

Network Attachment

Control Functions

Transport Functions

NNIUNI

Application Support Functions & Service Support Functions

Applications

Re-distribution of Service Intelligence


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Migration ofService Intelligence

UserAccessUser Access


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PSTN & ISDN Evolution to NGN

What to consider when evolving PSTN/ISDN to NGN


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Transport Signalling and control Management Services

Bearer servicesSupplementary services

Operation, administration and maintenance (OAM) Naming, numbering and addressing Accounting, charging and billing Inter-working National regulations Emergency telecommunications Security aspects

Different Approaches

Call server (CS)-basedEquipment re-useService continuity

IP multimedia sub-system (IMS)-based

Immediate migrationAccess to new services


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NGN: CS-based


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PSTN

Packet SwitchedNetwork

signalling

AN

PABX

Call Server

Private Lines

Wireless

ISDN

Cable, IAD, xDSL

Example of PSTN/ISDN Evolution


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NGN: IMS-based


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Packet Switched Network

Other networks

IMS

Other networks

signalling

PSTN/ISDN Emulation & Simulation


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PSTN/ISDN emulation Provides PSTN/ISDN service capabilities and interfaces using adaptation to an IP infrastructure.

PSTN/ISDN simulationProvides PSTN/ISDN-like service capabilities using session control over IP interfaces and infrastructure.


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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

UNI

UNI

User Equipment

User Equipment

Evolution Strategy


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Transition costBusiness model

Customer expectationAre 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

NGN Recommendations, Y Series


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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

NGN Recommendations, Q Series


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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

Conclusion


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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

Compliance to global standards would reduce procurement costs and promote inter-operability

List of Acronyms )


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ADF Adaptation FunctionAG Access GatewayAN Access NetworkANI Application Network

InterfaceATM Asynchronous Transfer

ModeCAPEX CAPital EXpenditure CO-CS connection-oriented circuit-

switched CO-PS connection-oriented

packet- switched CLPS connectionless packet-

switched CS Call ServerDSL Digital Subscriber LineDTE Data Terminal EquipmentFR Frame Relay IAD Integrated Access DeviceIMS IP Multimedia Sub-system IP Internet ProtocolISDN Integrated Services Digital

NetworkIWF Inter-working FunctionLE Local ExchangeNGN Next Generation NetworkNNI Network Network Interface

OAM Operation, Administration, Maintenance

OPEX OPerating EXpenditurePABX Private Automatic Branch

eXchangePBX Private Branch eXchangePDH Plesiochronous Digital

HierarchyPLMN Public Land Mobile NetworkPSPDN Packet Switched Public Data

NetworkPSTN Public Switched Telephone

NetworkQoS Quality of ServiceREV Reverse ChargingSDH Synchronous Digital

HierarchySG Signalling GatewaySIP Session Initiation ProtocolTDM Time Division MultiplexingTE Transit ExchangeTMG Trunking Media GatewayTV TelevisionUAM User Access ModuleUNI User-Network InterfaceWWW World Wide Web

Thank you for your attention


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Dr. Ghassem KoleyniEmail: [email protected] Tel: +1 613 592 5344

mailto:[email protected]


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Back up slides

ITU-T NGN Related Recommendations (Q Series)


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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.3201.1Authentication 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.3301.1 Resource control protocol - Protocol at the Rs interface

Q.3302.1 Resource control protocol - Protocol at the Rp interface



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Q.3303.0 Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE) (Rw interface): Overview

Q.3303.1 Protocol at the interface between a Policy Decision Physical Entity (PD-PE) and a Policy Enforcement Physical Entity (PE-PE): COPS Alternative

Q.3303.2 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.3303.3 Protocol at the interface between the policy decision physical entity (PD-PE) and the policy enforcement physical entity (PE-PE) (Rw interface): Diameter

Q.3304.1Resource 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



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Q.3304.2 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.3305.1 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

ITU-T NGN Related Recommendations (Y Series)


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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



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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



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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

Useful Links

ITUhttp://www.itu.int

NGN Global Standards Initiative (NGN-GSI) http://www.itu.int/ITU-T/ngn/index.html

SG11 (Signalling & Control Protocols)http://www.itu.int/ITU-T/studygroups/com11/index.asp

SG 13 (Future Networks and NGN)http://www.itu.int/ITU-T/studygroups/com13/index.asp


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Documents

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