Next Generation Networks architecture by ITU-Tkt.agh.edu.pl/.../slides/ngn.pdfNext Generation Networks architecture by ITU-T Robert W ojcik Department of Telecommunications 21st January

Next Generation Networksarchitecture by ITU-T

Robert Wojcik

Department of Telecommunications

21st January 2009, Krakow, Poland

Outline

1 The beginnings

2 The definition

3 Fundamental characteristics of NGN

4 NGN architecture

Outline

1 The beginnings

2 The definition


4 NGN architecture

Outline

1 The beginnings

2 The definition


4 NGN architecture

Outline

1 The beginnings

2 The definition


4 NGN architecture

Outline

1 The beginnings

2 The definition


4 NGN architecture

The motivation towards NGN

the Internet was designed for simple connectivity of best-efforttraffic

explosion of data traffic

strong demand for new multimedia services

increasing demand for mobility

The genesis

ITU-T Workshop on IP Networking and Mediacom in Geneva,April 2001

ITU-T Workshop “NGN: what, when and how”, Geneva, July2003

no common understanding of what an NGN is!

So why did ITU-T take lead, when there was no consensus?

The genesis





The genesis





The genesis

several institutions began to work on NGN

overlaps ?

Focus group on NGN (FGNGN) was created under ITUresponsibility

European Telecommunications Standards Institute (ETSI)Alliance of Telecommunications Industry Solutions (ATIS)China Communications Standards Association (CCSA)Telecommunication Technology Association (TTA)Telecommunication Technology Committee (TTC)9th Global Standard Collaboration (GSC)

The genesis

several institutions began to work on NGN

overlaps ?

Focus group on NGN (FGNGN) was created under ITUresponsibility

European Telecommunications Standards Institute (ETSI)Alliance of Telecommunications Industry Solutions (ATIS)China Communications Standards Association (CCSA)Telecommunication Technology Association (TTA)Telecommunication Technology Committee (TTC)9th Global Standard Collaboration (GSC)

Outline

1 The beginnings

2 The definition


4 NGN architecture

ITU-T Y Series Recommendations

GLOBAL INFORMATION INFRASTRUCTURE Y.100-Y.899INTERNET PROTOCOL ASPECTS Y.1000-Y.1899NEXT GENERATION NETWORKS Y.2000-Y.2899Frameworks and functional architecture models Y.2000-Y.2099Quality of Service and performance Y.2100-Y.2199Service aspects: Service capabilities and service architecture Y.2200-Y.2249Service aspects: Interoperability of services and networks in NGN Y.2250-Y.2299Numbering, naming and addressing Y.2300-Y.2399Network management Y.2400-Y.2499Network control architectures and protocols Y.2500-Y.2599Security Y.2700-Y.2799Generalized mobility Y.2800-Y.2899

Related documents

ITU-T Recommendation Y.2001, “General overview ofNGN”, 12/2004

ITU-T Recommendation Y.2011, “General principles andgeneral reference model for Next Generation Networks”,10/2004

ITU-T Recommendation Y.2012, “Functional requirementsand architecture of the NGN”, 09/2006

ITU-T Recommendation Y.2121, “Requirements for thesupport of flow-state-aware transport technology in NGN”

Areas of key importance in NGNIdentified by ITU-T Recommendation Y.2001, Section 8

General framework and architectural principles

Architecture models for the NGN

End-to-end QoS

Service platforms

Network management

Security

Generalized mobility

Network control architecture and protocols

Service capabilities and service architecture

Interoperability of services and network in NGN

Numbering, naming and addressing

Disaster and relief communication capabilities

Keywords

ITU-T Rec. Y.2001

decoupling between transport and service

generalized mobility

GII (Global Information Infrastructure)

NGN

overview

DefinitionITU-T Rec. Y.2001 (12/2004)

Next Generation Networks (NGN)

A packet-based network able to provide telecommunication servicesand able to make use of multiple broadband, QoS-enabledtransport technologies and in which service-related functions areindependent from underlying transport-related technologies. Itenables unfettered access for users to networks and to competingservice providers and/or services of their choice. It supportsgeneralized mobility which will allow consistent and ubiquitousprovision of services to users.
















Objectives of ITU-T NGNEconomic aspects

promote fair competition

encourage private investment

define a framework for architecture and capabilities to be ableto meet various regulatory requirements

provide open access to networks
















Objectives of ITU-T NGNSocial aspects

ensuring universal provision and access to services

promoting equality of opportunity to the citizen

promoting diversity of content, including cultural andlinguistic diversity

recognizing the necessity of worldwide cooperation withparticular attention to less developed countries
















Outline

1 The beginnings

2 The definition


4 NGN architecture

Fundamental characteristics of NGNThe list

packet-based transfer

decoupling of service provision from transport

support for a wide range of services

real time, streaming, non-real time and multimedia

broadband capabilities with end-to-end QoS


interworking with legacy networks via open interfaces

unrestricted access by users to different service providers

converged services between fixed/mobile

independence of service-related functions from underlyingtransport technologies

support of multiple last-mile technologies













Fundamental characteristics of NGNDecoupling of service provision from transport, Y.2011

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

























Fundamental characteristics of NGNEnd-to-end QoS in NGN

Flow-state-aware (FSA) transport technology

4 classes of service (service contexts)

ARS, GRS, MRS, VRS

flow-based differentiation

stateful aggregations

in-band and out-of-band signaling













Fundamental characteristics of NGNGeneralized mobility

Generalized mobility

The ability for the user or other mobile entities to communicateand access services irrespective of changes of location ortechnical environment. The degree of service availability maydepend on several factors including Access Network capabilities,service level agreements between the user’s home network and thevisited network (if applicable), etc. Mobility includes the ability oftelecommunication with or without service continuity.

Fundamental characteristics of NGNGeneralized mobility, Y.2012

Home Core NGN-1

User-1

Visited Access

Home Core NGN-2

User-2

Fundamental characteristics of NGNGeneralized mobility, Y.2012

Visited Core NGN

User-1

Visited Access

Home Core NGN-1













Fundamental characteristics of NGNInterworking with legacy networks via open interfaces

NGN

Other NGNs ……

IWF IWF

Internet

IWF

PSTN

IWFPLMN

IWF

















































Fundamental characteristic summaryC. Lee and D. Knight, “Realization of the Next-GenerationNetwork”

SP3 SPmSP2

Videoservicesnetwork

xDSL/optic based fixed-mobileUser

ANP 1 (DSL)

Access networkprovider domain

ANP 2 (DSL)

ANP 3 (Opt)

ANP N (cable)

CNP1 CNP

2

CNP3

SP1

Service/applicationprovider domain

Core networkprovider domain

New policy regulationenvironment (horizontal)

Videoservices

(TV,movie,etc.)

Telephoneservicesnetwork

Telephoneservices

Pre-NGN

Dataservicesnetwork

Dataservices(www,email,etc.)

Resource-based pol./reg.

Service-based policy/regulation

Voice Internet Video MMPol.reg.

Pol. XReg. x

IP (future packet ?) platform

New businessenvironment (compositional)

Outline

1 The beginnings

2 The definition


4 NGN architecture

NGN architecture overview“NGN Architecture: Generic Principles, Functional Architecture,and Implementation”

Transport functions

Service userprofiles

Application functions

ANI

Servicescontrol

Service stratum

Transport stratum

UNI

End-userfunctions

Othernetworks

Man

agem

ent

func

tion

s

Third party application providers

NNI

Transport userprofiles

Service controlfunctions

Networkattachment

control functions

Accessfunctions

Access transportfunctions

Edgefunctions

ControlMediaManagement

Gatewayfunctions

Resource andadmission

control functions

Transport control functions

Media handlingfunctions

Core transportfunctions

Bibliography I

“General overview of NGN,” Recommendation ITU-T Y.2001,December 2004.

“General principles and general reference model for NextGeneration Networks,” Recommendation ITU-T Y.2011,October 2004.

“Functional requirements and architecture of the NGN,”Recommendation ITU-T Y.2012, September 2006.

“Requirements for the support of flow-state-aware transporttechnology in an NGN,” Recommendation ITU-T Y.2121,January 2008.

Bibliography II

M. Carugi, B. Hirschman, and A. Narita, “Introduction to theITU-T NGN focus group release 1: target environment,services, and capabilities,” Communications Magazine, IEEE,vol. 43, pp. 42–48, October 2005.

J. Cochennec, “Activities on next-generation networks underGlobal Information Infrastructure in ITU-T,” IEEECommunications Magazine, vol. 40, pp. 98–101, July 2002.

K. Knightson, N. Morita, and T. Towle, “NGN architecture:generic principles, functional architecture, andimplementation,” IEEE Communications Magazine, vol. 43,pp. 49–56, October 2005.

Bibliography III

C. Lee and D. Knight, “Realization of the Next-GenerationNetwork,” IEEE Communications Magazine, vol. 43, pp.34–41, October 2005.

J. Song, M. Y. Chang, S. S. Lee, and J. Joung, “Overview ofITU-T NGN QoS Control,” Communications Magazine, IEEE,vol. 45, pp. 116–123, September 2007.

Thank you for yourattention!

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Next Generation Networks architecture by ITU-Tkt.agh.edu.pl/.../slides/ngn.pdfNext Generation Networks architecture by ITU-T Robert W ojcik Department of Telecommunications 21st January