Transcript PowerPoint

Information Document 20-E
ITU-T Study Group 2
March 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 concept
Toys
Communicating
Coffee-maker
IP Clock-radio
Communicating
Digital
Camera
Musical instruments
(Stan Moyer, Telcordia)
IP Telephone
Games
Internet (NGI)
Engine monitoring,
toll collection
Maps, directions,
Internet radio,
engine software
Digital Car
upgrades
IP Radio/TV/
Audio Player
IP
Virtual vision in ordinary
prescription eyeglasses
AC
IP Lighbulb
(Vint Cerf, MCI)
NGN Backbone N.K. technology
IP
IntServ
DiffServ
MPLS
Internet QoS / Required to large Bandwidth
IP/DiffServ/GMPLS over DWDM
Differentiated Optical QoS Service Framework
SONET/SDH
DWDM
Survivability & Network optimization
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
Applicative, Middleware, Baseware svc.s
.
Customer Operations Processes
Resources
Fulfilment
Assurance
Billing
Invocation
Functional groupings
Management
Control
Transport
End-to-end Quality of Service (QoS)

To handle both the way in which different end system can reach
agreement ;




For the issue of upper layer QoS control;


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.
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 QoS

DWDM based NGN QoS provision
DiffServ flows
Class1
IP layer
...
Class2
...
...
Class3
...
...
...
E-O/O-E
Interface
(GMPLS)
Service class
mapping
1
2
3
4
Optical channel section
(OCh)
DWDM
(G.872)
Optical multiplex section
(OMS)
Optical transmission section
(OTS)
5
6
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.
Network management






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.
MPLS Gateway Networking Solution implicat.s
Multiservice Access Networks
Core Network
.
Multiservice Access Networks
End-to-end SPVC/SVCs
PNNI Networking
MPLS Gateway
•L2/L3 VPN
services
•Traditional
L2 services
ATM
FR
L2 Access
PNNI
Networks
MPLS Gateway
CR-LDP/RSVP-TE
IWF
IWF
ATM
FR
PNNI L2 Access
Networks
•L2/L3 VPN
services
•Traditional
L2 services
Ethernet
Ethernet
Stacked LSPs
MPLS Core
•L3 VPN
and other
IP services
IP-based
Networks
IP
Routing
IP
Routing
IP-based
Networks
•L3 VPN
and other
IP services
OAM & Fault Management
I.610
Y.iw
Y.1711
LSP “tunnel”
IWF
IWF
ATM Network
A
ATM Network
B
Q3, M3
OSF/TMN
?
= Possible trouble location
SNMP
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