Status of NGN architecture related studies in ITU-T SG13

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Status of NGN architecture related studies in
ITU-T SG13
JOINT ITU-T SG13 - IEEE NGSON WORKSHOP ON OVERLAY
NETWORKING (Geneva, 15 May 2009)

• Olivier Le Grand
• WP 3/13 chairman
• France Telecom

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Separation of services from transport in NGN
(Rec. Y.2011)

• "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

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NGN architecture overview (Rec Y.2012)
Applications
ANI
Application Support Functions Service Support
Functions
Service Control Functions
Service stratum
Management Functions
End-User Functions
Resource and Admission Control Functions
Other Networks
Transport Control Functions
Transport Functions
UNI
NNI
Transport stratum
Control
Media
Management
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NGN functional components
"Service delivery platform" making use of NGN
easily
Applications
Service Stratum
Evolution scenario of PSTN and short-term
solution (Y.2031)
Application Support Functions and Service
Support Functions (ASFSSF)
Application Functions
Network attachment (Rec Y.2014)
Service Control Functions
S. User Profile Functions
Other NGN Service Components
Re-use and adaptation of 3GPP IMS to provide
multimedia services (Rec Y.2021)
PSTN/ISDN Emulation Service Component
IP Multimedia
Component
IP Multimedia Service Component
PSTN/ISDN Simulation
Other Networks
Other Networks
Legacy Terminals
Network Attachment Control Functions (NACF)
Resource and Admission Control Functions (RACF)
Network Access
A unified IP network with improved security and
QoS (Rec Y.2111)
Attachment Functions
Legacy Terminals
CustomerNetworks
Core Transport Functions
Access Network Functions
Core transport
Functions
Edge Functions
NGN Terminals
Transport Stratum
End-User Functions

Note Gateway (GW) may exist in either Transport
Stratum or End-User Functions.
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Functional Entities (ASFSSF, Y.2012)
Applications
ANI
Application Support Functions and Service Support
Functions
A-4 SS-FE
A-3 APL-SCM-FE
A-2 APL-GW-FE
A-U1
A-S4
A-S1
A-S2
A-S6
A-S5
A-S3
A-T1
S-6 SAA-FE
S-14 MRB-FE
S-5 SUP-FE
UNI
Service Control Functions
S-4 SL-FE
S-1 S-CSC-FE
S-15 GSC-FE
End User Functions
S-13 MRC-FE
Transport Processing Functions
T-9 SG-FE
Note may include Authentication,
Authorization, and Accounting
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Ongoing work on ASFSSF 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
  ASFSSF FEs

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NGN OSE functional positioning
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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

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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)

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Back up slides
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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
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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-loc-split Functional architecture of Id-Loc-split in NGN
Y.CDS Architectural configuration of Content Delivery and Storage in NGN
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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/ITU-T/studygroups/com13/index.a
  sp

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