JOINT ITU-T SG13 - IEEE NGSON WORKSHOP ON
OVERLAY NETWORKING
(Geneva, 15 May 2009)
Status of NGN architecture
related studies
in ITU-T SG13
Olivier Le Grand
WP 3/13 chairman
France Telecom
Geneva, 15 May 2009
Separation of services from transport in
NGN (Rec. Y.2011)
e.g., Video services (TV, movie, etc.)
e.g., Data services (WWW, e-mail, etc.)
e.g., Voice telephony services (audio, fax, etc.)
NGN services
CO-CS, CO-PS and CL-PS layer technologies
NGN transport
"NGN service stratum" vs "NGN transport stratum"
Each stratum comprises one or more layers, where each layer is conceptually
composed of a data (or user) plane, a control plane, and a management
plane
Geneva, 15 May 2009
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NGN architecture overview (Rec Y.2012)
Applications
ANI
Management Functions
Application Support Functions & Service Support Functions
Service User
Profiles
Service Control
Functions
Service stratum
Network Attachment
Control Functions
Transport User
Profiles
End-User
Functions
Resource and
Admission
Control Functions
Other
Networks
Transport Control Functions
Transport Functions
UNI
NNI
Transport stratum
Geneva, 15 May 2009
Control
Media
Management
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NGN functional components
"Service delivery
platform" making use
of NGN easily
Applications
Service Stratum
Application Support Functions and
Application
Functions (ASF&SSF)
Service
Support Functions
Network
attachment
(Rec Y.2014)
S. User
Profile
Functions
Other NGN Service
Components
Service
Control
Functions
Legacy
Terminals
Legacy
Terminals
IP Multimedia
Component
IP Multimedia
&PSTN/ISDN
Simulation
Service Component
GW
GW
Customer
Networks
NGN
Terminals
End-User
Functions
Geneva, 15 May 2009
Network Attachment
Network Access
T. User
User
Control Functions
Profile
Profile Attachment
(NACF)
Functions
Functions
Functions
AccessTransport
Network
Access
Functions
Functions
Edge
Functions
Resource and Admission
Control Functions
(RACF)
Re-use and
adaptation of
3GPP IMS to
provide
multimedia
services
(Rec Y.2021)
Other Networks
PSTN/ISDN Emulation
Service Component
Evolution
scenario of PSTN
and short-term
solution (Y.2031)
A unified IP network
with improved security
and QoS
(Rec Y.2111)
Core Transport
Core transport
Functions
Functions
Transport Stratum
* Note: Gateway (GW) may exist in either Transport Stratum or End-User
Functions.
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Functional Entities (ASF&SSF, Y.2012)
Applications
ANI
A-1: AS-FE*
A-2: APL-GW-FE*
A-U1
A-S1 A-S2
A-S3
S-14: MRB-FE
A-S4
A-S5
S-6: SAA-FE
UNI
S-15: GSC-FE
End User
Functions
A-4: SS-FE
A-3: APL-SCM-FE*
S-1: S-CSC-FE
A-S6
A-T1
S-5: SUP-FE
S-4: SL-FE
S-13: MRC-FE
T-9: SG-FE
Geneva, 15 May 2009
Note: * may include Authentication, Authorization, and Accounting
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Ongoing work on ASF&SSF: Y.OSE-arch
"Open Service Environment functional architecture in NGN":
Based on OSE capabilities and functional components defined in
Rec ITU-T Y.2234
Objectives: define the OSE functional architecture model
relationship/mapping with already defined Y.2012 ASF&SSF FEs
Applications
ANI
OSE
Service Coordination
Service Discovery
Service Registration
Service Management
Service Composition
Service Development
Support
Interworking with Service Creation
Environments
Policy Enforcement
Geneva, 15 May 2009
Other ASF&SSF FEs
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NGN OSE functional positioning
Applications
ANI
Policy Enforcement
Service
Discovery
Service
Management
Service
Registration
Service
Coordination
Service
Development
Support
Service
Composition
Interworking
with
Service
Creation
Environment
Management Functions
OSE
Application Support Functions & Service Support Functions
Service User
Profiles
Service Control
Functions
Service stratum
Network Attachment
Control Functions
End-user
Functions
Transport User
Profiles
Resource and
Admission
Control Functions
Other
Networks
Transport Control Functions
Transport Functions
UNI
NNI
Transport stratum
Geneva, 15 May 2009
Control except OSE
Media
Management
Control for OSE
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Overlay networking and NGN
Inputs referring to "Overlay networking" targeting
different scenarios:
e.g. for supporting multicast (IPTV, Content Delivery), …
Scenarios, corresponding requirements and capabilities to be
consolidated
Relationship to NGN functional architecture:
Cases to be considered (on a per scenario basis):
Overlay to the IP layer but still part of NGN Transport stratum
Overlay to the NGN Transport stratum, i.e. part of the NGN
Service stratum
Overlay to the NGN Service stratum, i.e. above the NGN
Functions to be supported
Relationship to existing NGN functions and functional
entities to be assessed
Geneva, 15 May 2009
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Conclusion
The NGN architecture is being enhanced in
order to support Open Service Environment
(OSE) capabilities as defined in Y.2234
Paving the way towards a possible NGN "Service Delivery
Environment/Platform" architecture
Collaboration with other SDOs such as OMA, OASIS, TMF,…
Use of "Overlay networking" techniques in
NGN is being studied
Consolidation expected in terms of addressed scenarios,
corresponding requirements and related architectural
impacts
Note: See backup slides for information on NGN architecture related
recommendations (approved or under development)
Geneva, 15 May 2009
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Back up slides
Geneva, 15 May 2009
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ITU-T NGN architecture related
Recommendations (Y Series)
Y.2001
General overview of NGN
Y.2011
General principles and general reference model for Next
Generation Networks
Y.2012
Functional requirements and architecture of the NGN
Y.2014
Network attachment control functions in next generation
networks
Y.2015
General requirements for ID/locator separation in NGN
Y.2021
IMS for Next Generation Networks
Y.2031
PSTN/ISDN emulation architecture
Y.2111
Resource and admission control functions in Next Generation
Networks
Y.2233
Requirements and framework allowing accounting and charging
capabilities in NGN
Y.2234
Open service environment capabilities for NGN
Y.1910
IPTV functional architecture
Geneva, 15 May 2009
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ITU-T NGN architecture related
Recommendations (Y series)
Y.2804
Generic framework of mobility management for NGN
Y.2805
Framework of location management for NGN
Y.2806
Framework of handover control for NGN
Y.2901
The carrier grade open environment reference model
Y.FRA2
Functional requirements and architecture of the NGN (version
2)
Y.MMCF
Mobility management and control framework and architecture
within the NGN transport stratum
Y.SMF
Mobility management in service stratum for NGN
Y.OSE-arch
Open Service Environment Functional Architecture for NGN
Y.FMC-IMS
Fixed mobile convergence with a common IMS session control
domain
Y.FAid-locsplit
Functional architecture of Id-Loc-split in NGN
Y.CD&S
Architectural configuration of Content Delivery and Storage in
NGN
Geneva, 15 May 2009
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Useful Links



ITU
http://www.itu.int
NGN Global Standards Initiative (NGN-GSI)
http://www.itu.int/ITU-T/ngn/index.html
SG 13 (Future Networks including mobile and
NGN)
http://www.itu.int/ITUT/studygroups/com13/index.asp
Geneva, 15 May 2009
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