information document 20-e itu-t study group 2 march 2003 question:all source:tsb title:ngn...
TRANSCRIPT
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