NGN: Basic Architecture NGN: Basic Architecture & & - - PowerPoint PPT Presentation

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6

I nternational Telecom m unication Union

ITU-T

NGN: Basic Architecture NGN: Basic Architecture & & Interesting Issues Interesting Issues

Keith Knightson

Consultant Industry Canada

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 2

ITU-T

Outline

• S

et scene for subsequent sessions by:

• Introducing basic concepts
• S

howing high-level viewpoints

• List architectural challenges
• S

ummarize architectural work to date

• S

how areas for further study

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 3

ITU-T

NGN Definition

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 to competing service providers and/or services

• f their choice. It supports generalized mobility

which will allow consistent and ubiquitous provision

• f services to users.

From ITU-T Recommendation Y.2001

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 4

ITU-T

Y.2 0 1 1 : NGN General Reference Model

Pre-NGN: Vertically Integrated Networks

Telephony Services Data Services (WWW, e-mail, etc) Video Services (TV, movie, etc) PSTN Video Services Network Data Services Network

NGN Transport Stratum NGN Services Stratum

ITU-T Rec. Y.2011

NGN: Horizontally Integrated Networks

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 5

ITU-T

Single Convergence Layer

Internet Protocol (IP) Any Service & Every Service Any Transport & Every Transport Technology Two Service Domains Scope Of “NGN” Services Stratum Transport Stratum

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 6

ITU-T

Service Provision: Mediated and non-m ediated services

Switched Core Packet Network(s) (Switched) Packet Access Network(s) Transport Network Interconnection Transport Network Interconnection Single/Distributed (Switched) Packet Access Network(s) Application & Service Servers Application & Service Servers

End User System

S

End User System

S

Mediated Services Mediated Services Non-Mediated Services Service Interconnection

T T

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 7

ITU-T

Effects of Separation: the good, the bad and the challenge

• Good:
• Any service over a single IP transport network
• Bad:
• Two different levels of control, authentication, admission,

charging, etc.

• Challenge:
• S

ervice to transport coupling & mapping for: —QoS selection —QoS control —transport resource allocation — monitoring —accounting for usage

Solution: Resource & Admission Control Functions (Session 3)

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 8

ITU-T

Basic Functional View

Other Networks

Service Control Functions

Transport stratum Service stratum

Management Functions

Service User Profiles Transport User Profiles Control Media Management

Application/Service Support Functions

Third Party Applications

ANI

End-User Functions

Transport Control Functions

Transport Functions

NNI UNI

Network Attachment Control Functions Resource and Admission Control Functions

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 9

ITU-T

Com ponent View

Legacy Terminals Legacy Terminals

Transport Stratum Service Stratum

End-User Functions

Application Functions Core transport Functions

NGN Terminals Customer Networks

Other Networks Application/Service Support Functions Core Transport Functions Other Networks

Transport Stratum

Edge Functions Access Transport Functions Service Control Functions

Network Access Attachment Functions NAAF Network Attachment Control Functions (NACF)

Access Network Functions

Resource and Admission Control Functions (RACF) User Profile Functions

• T. User

Profile Functions GW GW Other Multimedia Service Components … Streaming Service Component PSTN / ISDN Emulation Service Component

IP Multimedia Component &PSTN/ISDN Simulation

IP Multimedia Service Component

• S. User

Profile Functions GW GW

Third Party Applications

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 0

ITU-T

Other Architectural Challenges

• Mobility
• Fixed to mobile convergence (FMC)
• Application-driven QoS

:

• Classes and their designations
• Explicit bandwidth selection
• S

ervice to transport mapping & control

• Flow awareness

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 1

ITU-T

Architectural Evolution

• QoS

in Access:

• Multiple terminals, multiple QoS
• Role of Home Gateway (shaping, limiting)
• Home gateway management control
• Distributed network control of/ for QoS

path:

• Horizontal means
• Vertical means
• Monitoring, dynamic allocations, accounting
• Network Control and Management
• Protect from attack
• S

eparation from payload paths

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 2

ITU-T

Fixed to Mobile convergence

IP Access Network Base Station Controller GANC (UMA) Network Controller Radio Access Network GSM/IMS Core Service Architecture UMA-enabled Dual Mode Handset

WiFi RG VoIP SIP Server Tunnelled IMS stack Native IP Stack SIP Fixed/wireless Telephone IP Core Transport

…. …. …. ….

…. …. …. ….

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 3

ITU-T

Hom e Gatew ay Architecture/ Functionality

Customer Premise Network Home Routing Gateway Set Top Box Set Top Box

Network Terminating Unit 10/100 Base-T

Television Desktop PC Desktop PC

Other Devices, Appliances, etc

IP phone Television …. …. …. ….

QoS per device/terminal

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 4

ITU-T

Sum m ary of key architectural w ork in SG1 3 ( 1 )

• Y.2001: NGN Overview
• NGN Definition, Characteristics & Subject Areas
• Y.2011: General Reference Model
• High-level paradigms
• Separation of concerns, services from networks
• Architectural principles
• OSI model relevance
• G.805 relevance
• Y.FRA: Functional Requirements & Architecture
• Generic service control functions
• Generic transport control functions

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 5

ITU-T

Sum m ary of key architectural w ork in SG1 3 ( 2 )

• Y.IFN: IMS for NGN
• IMS functions
• Positioning with respect to Y.FRA
• Y.PIEA: PSTN/ISDN Emulation Architecture
• Call Server based emulation
• IMS based emulation
• Y.CSF: Converged Services Framework
• Service coordination across heterogenous systems and

technologies

• Overlay architecture across diverse systems

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 6

ITU-T

Areas for further study

• Streaming Services
• IPTV
• Identity based systems
• RFID
• Home Networks
• Home Gateways
• Gateway management

I TU-T W orkshop “NGN and its Transport Netw orks“ Kobe, 2 0 -2 1 April 2 0 0 6 1 7

ITU-T

The End