Information Document 20-E

ITU-T Study Group 2March 2003

QUESTION: ALL

SOURCE: TSB

TITLE: NGN activities in ITU-T (by Y-H. Choe, Engineer, ITU-T SG4)

CONTENTS NGN activities NGN project plan NGN Aspects Total solution in ITU-T Conclusions

NGN Initial Considerations NGN difficult to define in terms of:

specific technologies, specific architecture, Topology

Identify high-level paradigms Separation of concerns, services from networks, Service

Platform approach

Identify emerging NGN-generic issues Architectural principles, OSI model relevance Need for NGN models to show separation of concerns via

functional architectures

Access/Core Separation Competitive Access to Services “Access Network” to include switching/routing Multiple transport technologies, Ethernet, ATM, IP, MPLS in

various combinations

Global Roaming (fixed and wireless networks)

NGN Service conceptNGN Service concept

CommunicatingDigital Camera

Communicating Coffee-maker IP Clock-radio

(Stan Moyer, Telcordia)

IP Lighbulb(Vint Cerf, MCI)Digital Car IP Radio/TV/

Audio Player

Virtual vision in ordinaryprescription eyeglasses

Internet (NGI)

AC

IPEngine monitoring,toll collection

Maps, directions,Internet radio,engine software upgrades

IP Telephone

Toys

Games

Musical instruments

IntServIP DiffServ MPLS

Internet QoS / Required to large Bandwidth

SONET/SDH DWDM

Survivability & Network optimization

IP/DiffServ/GMPLS over DWDMIP/DiffServ/GMPLS over DWDMDifferentiated Optical QoS Service FrameworkDifferentiated Optical QoS Service Framework

NGN Backbone N.K. NGN Backbone N.K. technologytechnology

ITU-T NGN activities SG2 (Operational aspects of service provision, networks and

performance, including numbering, naming, and addressing) SG 4 (Network Management including TMN) SG 11 (Signaling requirements and protocols) SG 12 (End-to-end transmission performance of networks and

terminals, QoS) SG 13 (Multi-protocol and IP-based networks and their

internetworking) SG 15 (Optical and other transport networks) SG16 (Multimedia services, systems and terminals) SG 17 (Data Networks and Telecommunication Software) SSG ("IMT-2000 and Beyond and for mobility)

NGN project plan The concept of a NGN has been introduced to

take account the new situation in telecoms, characterized by a lot of factors : it aims at open competition between operators due to

the total deregulation of markets, explosion of digital traffic, e.g. due to the increasing

use of internet, increasing demand from users for new multimedia services,

increasing demand from users for a general mobility, etc..

major goal is to facilitate convergence of networks and services.

Basic characteristics of NGN Packet-based transfer, Separation of control functions Decoupling of service provision Support for a wide range of services Broadband capabilities Interworking with legacy networks Generalized mobility Unfettered access

ITU-T Study areas on NGN General framework models Functional architecture models End-to-end Quality of Service (QoS) Service platforms (APIs) Network management Security Mobility

General framework models General architectural principles

This will provide a basis for NGN. The technical objective will be to develop a

functional methodology and general model

Functional architecture methodology model will provide guidelines on how to define a

functional architecture for NGN

Functional architecture models Use of generic RM techniques, Definition of

interworking functions, Determination of how end-to-end service, call

control and user mobility can be supported across heterogeneous networks,

Definition of functionality of NGN-aware terminals, In terms of software upgrade mechanisms Redundancy and evolution of cost-reduced terminals Version negotiation and management

Overall functional architecture model for NGN I .

Management Control

Fulfilment Assurance Billing Invocation

Transport

Functional groupings

Resources

Applicative, Middleware, Baseware svc.s

Customer Operations Processes

End-to-end Quality of Service (QoS) To handle both the way in which different end system can reach

agreement ; on the end-to-end QoS for a call how the parameters set with this upper layer protocol can be used to

control the lower layer transport and access level QoS mechanisms.

For the issue of upper layer QoS control; a distinction can be made between telephony the wider topic of QoS

for multimedia Likewise the control of lower layer QoS mechanisms is best divided

into two topics: “vertical” protocol linking the upper and lower layer QoS mechanisms

(diffserv, etc) lower layer “horizontal” mechanism to link the lower layer QoS

control between different domains and networks.

Control Mechanism for Control Mechanism for QoSQoS

DWDM based NGN QoS provisionDWDM based NGN QoS provision

. . .

1

. . .

2

Class1

. . .

3

. . .

4

Class2

. . .

5

. . .

6

Class3

DiffServ flows

Optical channel section

(OCh)

Optical multiplex section

(OMS)

Optical transmission section

(OTS)

DWDM (G.872)

E-O/O-E Interface (GMPLS)

IP layer

Service class

mapping

Service platforms(APIs) NGN work on service platforms(API) should

concentrate on: Definition of service control architectures covering

both OSA APIs and proxy aspects; Enhancement of mechanisms to support provision of

services across multiple networks covering both service roaming and interconnectivity of services;

Development of mechanisms to support user presence and user control of service customisation and profiles;

Impact of user mobility on service platforms.

Enhancement “core” network management architecture

definition of basic network management services and interfaces

Development common TMN working methods TMN to TMN interoperation using X-interface Information models for Optical Transport

Network (OTN) management for NGN Inclusion and application of new architectural

concepts and new technologies such as tML.

Network management

MPLS Gateway Networking Solution implicat.s

. Multiservice Access NetworksMultiservice Access Networks Core Network

•L3 VPN and other IP services

ATMFR

Ethernet

ATM

FR

Ethernet

•L2/L3 VPN services•Traditional L2 services

•L3 VPN and other IP services

•L2/L3 VPN services•Traditional L2 services

MPLS Core

IP Routing

L2 AccessNetworks

IP-based Networks

IP Routing

L2 AccessNetworks

End-to-end SPVC/SVCs

IWF

PNNI Networking

Stacked LSPs

MPLS Gateway MPLS Gateway

PNNIPNNI

IWF

CR-LDP/RSVP-TE

IP-based Networks

OAM & Fault Management

ATM Network A

ATM Network B

LSP “tunnel”

IWF

IWF

= Possible trouble location

I.610 Y.1711Y.iw

OSF/TMN SNMP?

Q3, M3

Security Key Production Key Management Authentication

Need to further develop authentication

Global certification on security products/solutions provision of support for the transition from a

traditional network environment to IP-based networks

Mobility NGN wireless network and terminal configurability,

including the adaptation of resource allocation, Integration of fixed/mobile/broadcasting networks and

rules for distribution and decentralized control of functional entities,

Protocols that permit the network to adapt dynamically to changing channel conditions/Hand-over

Global Roaming, Congestion-control algorithms,

Total Solution in ITU-T Perfect Environment and Universal Functionality

Optical and Transport Network Security QoS, Data network and Telecommunication Software Network Management Signaling and protocols Mobility Language and Tools Multi protocol and IP-based network Operational aspects, Service provision and Performance Electro-magnetic environment Multimedia

CONCLUSIONS

NGN is the most expected near future network First Recommendation is expected 2004 Will combine Fixed network and Wireless network Makes come true to ‘Mobile computing

Environment’ ITU-T is the most perfect org. to NGN Bring your business/requirements and make it

Universal Recommendation Please visit : http://www.itu.int