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NGN Architecture Overview Speaker: Chen-Nien Tsai Adviser: Kai-Wei Ke

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NGN Architecture Overview. Speaker: Chen-Nien Tsai Adviser: Kai-Wei Ke. Outlines. Introduction Use Cases for Next-Generation Networks NGN Architecture Overview Transport Stratum Functions Service Stratum Functions Management Functions End-User Functions Summary. Introduction (1/3). - PowerPoint PPT Presentation

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Page 1: NGN Architecture Overview

NGN Architecture Overview

Speaker: Chen-Nien Tsai

Adviser: Kai-Wei Ke

Page 2: NGN Architecture Overview

2005/12/6 2

Outlines

IntroductionUse Cases for Next-Generation NetworksNGN Architecture Overview

Transport Stratum Functions Service Stratum Functions Management Functions End-User Functions

Summary

Page 3: NGN Architecture Overview

2005/12/6 3

Introduction (1/3)

In July 2003, ITU-T organized a NGN workshop.

In considering the results of this workshop, ITU-T Study Group 13 launched an NGN Joint Rapporteur Group (NGN-JRG).

The NGN-JRG identified key issues and developed fundamental standards for building the frameworks of an NGN.

ITU-T: International Telecommunication Union—Telecommunication Standardization Sector

Page 4: NGN Architecture Overview

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Introduction (2/3)

Recommendations Y.2001 and Y.2011 are the results, and are now the basis for NGN studies in ITU-T.

In parallel with the ITU-T initiatives, several standards organizations initiated their plans for NGN standards. Possible incompatibilities among future NGN

standards.

Page 5: NGN Architecture Overview

2005/12/6 5

Introduction (3/3)

After consulting ETSI and other organizations, ITU-T launched its Focus Group on NGN (FGNGN) in June 2004.

This Focus Group was required to coordinate all aspects of NGN studies.

ETSI: European Telecommunications Standards Institute

Page 6: NGN Architecture Overview

2005/12/6 6

Outlines

IntroductionUse Cases for Next-Generation NetworksNGN Architecture Overview

Transport Stratum Functions Service Stratum Functions Management Functions End-User Functions

Summary

Page 7: NGN Architecture Overview

2005/12/6 7

Use Case 1: Multimedia Conference

Product Designer

The supervisor

Sales

Project coordinator

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Use Case 2: Mobile Telemedicine

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2005/12/6 9

Key Aspects

Access to common services across multiple types of access networks.

Coordination of multiple types of communications from a common control point in the network.

Page 10: NGN Architecture Overview

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The Definition of an NGN Next-Generation Network (NGN):

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 competing service providers and/or services of their choice.

It supports generalized mobility that will allow consistent and ubiquitous provision of services to users.

Page 11: NGN Architecture Overview

2005/12/6 11

What’s Old: Vertically-Integrated Networks

Page 12: NGN Architecture Overview

2005/12/6 12

What’s New:Horizontally-integrated Network

Page 13: NGN Architecture Overview

2005/12/6 13

Outlines

IntroductionUse Cases for Next-Generation NetworksNGN Architecture Overview

Transport Stratum Functions Service Stratum Functions Management Functions End-User Functions

Summary

Page 14: NGN Architecture Overview

2005/12/6 14

Page 15: NGN Architecture Overview

2005/12/6 15

NGN Architecture Overview (1/2)

The NGN functions are divided into service and transport strata.

End-user functions are connected to the NGN by the user-to-network interface (UNI).

Page 16: NGN Architecture Overview

2005/12/6 16

NGN Architecture Overview (2/2)

Other networks are interconnected through the network-to-network interface (NNI).

The application-to-network interface (ANI) forms a boundary with respect to third-party application providers.

Page 17: NGN Architecture Overview

2005/12/6 17

Transport Stratum Functions (1/6)

Transport stratum provide IP connectivity for all components withi

n the NGN. It is responsible for providing end-to-end QoS. It is divided into access networks and the core n

etwork.

Page 18: NGN Architecture Overview

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Transport Stratum Functions (2/6)

Access Functions Manage end-user access to the network. They are access-technology-dependent.

Access Transport Functions They are responsible for transporting informatio

n across the access network. Also provide QoS control mechanisms.

Page 19: NGN Architecture Overview

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Transport Stratum Functions (3/6)

Edge Functions They are used for traffic processing when acces

s traffic is merged into the core network.

Core Transport Functions They are responsible for transporting informatio

n throughout the core network. Also provide QoS control mechanisms.

Page 20: NGN Architecture Overview

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Transport Stratum Functions (4/6)

Resource and Admission Control Functions (RACF) Provide admission control and gate control func

tionalities. Admission control involves checking authenticat

ion and authorization.

Page 21: NGN Architecture Overview

2005/12/6 21

Transport Stratum Functions (5/6)

Network Attachment Control Functions Provide initialization of end-user functions for

accessing NGN services. Assist end-user equipment in registering and

starting use of the NGN.

Transport User Profile Functions Represents the compilation of user and other

control data. May be specified and implemented as a set of

cooperating databases.

Page 22: NGN Architecture Overview

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Transport Stratum Functions (6/6)

Gateway Functions Provide capabilities to interwork with other netw

orks.

Media Handling Functions They are media resource processes for providin

g services.

Page 23: NGN Architecture Overview

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Service Stratum Functions (1/3)

These functions provide session-based and non-session based services.

Session-based services: IP Telephony, videoconferencing, and video

chatting.

Non-session based services: Video streaming and broadcasting.

Page 24: NGN Architecture Overview

2005/12/6 24

Service Stratum Functions (2/3)

Service and Control Functions Include session control functions, a registration

function, and authentication and authorization functions at the service level.

Service User Profile Functions Represents the compilation of user and other

control data. May be specified and implemented as a set of

cooperating databases.

Page 25: NGN Architecture Overview

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Service Stratum Functions (3/3)

Application Functions NGN support open APIs enabling third-party

service providers to create enhanced services.

Page 26: NGN Architecture Overview

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Management Functions

These functions enable the NGN operator to manage the network and provide NGN services with the expected quality, security, and reliability.

These functions include charging and billing functions.

Page 27: NGN Architecture Overview

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End-User Functions

End-user functions are connected to the NGN by the UNI.

No assumption are made about the diverse customer interfaces and customer network that may be connected to the NGN access network.

All customer equipment categories are supported in the NGN.

Page 28: NGN Architecture Overview

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Outlines

IntroductionUse Cases for Next-Generation NetworksNGN Architecture Overview

Transport Stratum Functions Service Stratum Functions Management Functions End-User Functions

Summary

Page 29: NGN Architecture Overview

2005/12/6 29

Summary (1/2)

One of the important key features of the NGN is the separation between different functionalities.

Horizontally, the NGN is broken down into three sections: Customer equipment, network equipment, and

interconnection with other networks.

Page 30: NGN Architecture Overview

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Summary (2/2)

Vertically, the NGN is separated into two areas: The service stratum and the transport stratum.

The NGN is no longer a next generation objective, but is becoming a present generation reality.

Page 31: NGN Architecture Overview

2005/12/6 31

References

M. Carugi, B. Hirschman, and A. Narita, “Introduction to the ITU-T NGN Focus Group Release 1: Target Environment, Services, and Capabilities,” IEEE Communications Magazine, vol. 43, Oct. 2005, pp. 42 – 48.

K. Knightson, N. Morita, and T. Towle, “NGN Architecture: Generic Principles, Functional Architecture, and Implementation,” IEEE Communications Magazine, vol. 43, Oct. 2005, pp. 49 – 56.

Chae-Sub Lee and D. Knight, “Realization of the Next-Generation Network,” IEEE Communications Magazine, vol. 43, Oct. 2005, pp. 34 – 41.

Page 32: NGN Architecture Overview

Backup Materials

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General Principles for NGN (1/2)

The NGN layered system and the seven-layer open systems interconnection basic reference model are different.

For NGN: The number of layers may not be seven. The functions of the individual layers may not

correspond to those of the OSI BRM. Certain prescribed or proscribed condition/

definitions in the OSI BRM may not be applicable.

And more.

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The Impact of NGN

The separation between the service stratum and the transport stratum.

The separation of access capabilities with core transport capabilities.

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Page 37: NGN Architecture Overview

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General Principles for NGN

Divide functions into two distinct groups, or planes: Control plane. Management plane.

Grouping functions allows the functional interrelationships and information flows within a given group to be defined.

Page 38: NGN Architecture Overview

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General Functional Model