International Telecommunication Union
NGN in ITU-T
Chae-Sub, LEE
Chairman of FG NGN
WTSA 2004. 7 October, Florianopolis Brazil
Contents
1. Why NGN ?
2. NGN Standardization
3. Key Features
4. Future Issues
5. Conclusion
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1. Why NGN ?
Packet based Environments
Expected Future Transition Trend : End-End Packets
Past : Seper. of Voice & Data Transp. Present : Sep. of V & D Access
Circuit Switch.
Circuit Switch. Circuit Switch.
Circuit Switch. Transp. Capa.
Transp. Capa. Access Capa.
Access Capa.
Packet Switch.
Transp. Capa. Packet Switch. Packet Switch.
Access Capa. Transp. Capa.
xDSL / FTTx
Future : Integration of V & D Access and Transp. Near Future : Integration of V & D Transport
Circuit Switch.
Circuit Switch. Transp. Capa.
Access Capa.
Packet Switch. Packet Switch.
Access Capa. Transp. Capa.
Packet Switch.
Packet Switch.
Transp. Capa.
Access Capa.
VoIP / VToA
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1. Why NGN ?
Separation btw. Services and Transport
• Key Feature of IP : Anything over IP, IP over Everything
• Most of Services using IP as their connection platform
• Most of Networks supporting transport of IP packet
• IP plays a key role to separate Services with Transport
(Any/All Applications Video Services (TV, movie, etc)
e.g. voice , data , video)
Services Data Services (WWW, e-mail, etc)
Anything & Everything Telephone Services
Scope Services
Internet Protocol
Of
(IP) “Internet”
Transport
Everything API
(Any & All Network technologies)
Transport
ACCESS CORE ACCESS
Two Policy Domains
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1. Why NGN ?
Impacts to Policy and Regulation base
• NGN provide a platform separating Services with Transport
• Politics and Regulation environment would be impacted with this
• Current Vertical environment would be changed to Horizontal env.
Pol. A Pol. B Pol. C Service-based Pol./Reg.
Reg. a Reg. b Reg. c
Pol.
Voice Internet Video MM Reg.
Phone Internet M-Ph
NGN IP (Future Packet ?) Platform Pol. X
Reg. x
PSTN IP-Net Mobile
xDSL/Optic based Fixed-Mobile
Resource-based Pol./Reg.
Current PolicyRegulation
Environment (Vertical)
New PolicyRegulation
Environment (Horizontal)
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1. Why NGN ?
NGN triggering Convergence
Telecom Broadcast. Telecom. mixed with Broadcast. Tele-Broadcast.
Voice Voice
Data Video Video Contents
Data
Telecom Broadca. Telecom Broadca.
Network Network
Start
Convg. Network Network Convg. NGN
Telecom Broadca. Telecom Broadca. 3M*
Services Services Services Services Services
* 3M : Multimedia, Multiparty, Multicasting
A B A B A B A·B Convg.
• Sep. Reg. Authority • Sep. defini. (each side) • Comp. btw. Reg. Aut. • Integ. Reg. Auth.
• Stable Bus. Structure • Exten. each Bus. area • Comp. btw. Bus. Play. • Confirmed Bus. Area
• Stable Tech. Infras. • Exten. of Tech. capa. • Comp. btw. Tech. Inf. • Stable Tech. Infras.
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2. NGN Standardization
NGN Standardization
ITU-T : NGN Project 2004
(2001 ~ 2004)
ITU-T
SG 2 SG 9 SG 12 SG 16 SG 17
NGN
WS SG 4 SG 11 SG 13 SG 15
(01 ~ 03) Q1
Q1 Q5
0
CCS
3GPP/2 A
Q16 Q6
TTC
xDSL ITU-T JRG-NGN
(2003. 9 ~ 2004. 6)
Forum TTA
ATIS ETSI
ITU-T FG NGN (’04.6 ~ ’05. 5)
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2. NGN Standardization
NGN 2004 Project
o A new ITU Project on NGN : SG13, Nov. 2002
o Project description document has been prepared
(http://www.itu.int/ITU-T/studygroups/com13/ngn2004/index.html )
o Fundamental characteristics for defining NGN
1. Packet-based transfer
2. Separation of control functions for bearer - call/session –
service
3. Decoupling of services and network, provision of open I/F
4. Wide range of services (RT/ streaming/ non-RT/ multimedia)
5. BB capabilities with e2e transparency, incl. AN utilization
6. Interworking with legacy networks
7. Generalized mobility
8. Unfettered access from users to competing SPs and
services
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2. NGN Standardization
JRG on NGN
• ITU-T SG 13 launched JRG-NGN at 1st August 2003 : 3 Meetings
• Joint Special Rapporteur Group Activity within SG 13
• Focus on “Foundational Documentation of NGN” until June. 2004
Draft Recommendations in AAP
Y.NGN-Overview (Y.2001) Overview of the NGN
Y.NGN-GRM (Y.2011) General principles and general reference model for NGN
Deliverables for further study
Deliverables Title
Y.NGN-GRQ General requirements for NGN
Y.NGN- FRM Functional requirements and architecture of the NGN
Y.NGN-CONV Next Generation Networks – Convergence scenarios
Y.NGN-MOB Mobility management requirements and architecture for NGN
Y.NGN-CMIP Customer manageable IP network
Y.NGN-MIG Migration of networks to NGN
Y.PSTN-NGN PSTN migration to NGN
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2. NGN Standardization
JRG on NGN
Deliverables on QoS for further study
Deliverables Title
Y.NGN-QoS General aspects of QoS and network performance in the NGN
Requirements and framework for end-to-end QoS architecture
Y.e2eqos.1
for NGN
An end-to-end QoS architecture based on centralized resource
Y.e2eqos.2
control for IP networks supporting NGN services
A QOS ARCHITECTURE FOR ETHERNET-BASED IP ACCESS
Y.123.qos
NETWORK
Y.ipaqos A QoS Framework for IP based access networks
Y.NGN-
Network performance of hybrid networks in NGN
NHNperf
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2. NGN Standardization
NGN Focus Group
• ITU-T Director launched NGN Focus Group at June 2004
• Almost every two month meeting : 6, 7, 9, 11/2004 and 2, 4, 6/2005
• Functional & Nomadicity Architecture (base on IMS & non-IMS)
• QoS (include the xDSL Access)
• Security Capability (inc. Authentication)
• NGN Control and Signaling Capability
• Evolution from CGN to NGN
WG Area Deliverables
WG 1 SR (Service Requirements) NGN Scope, Releases 1 / General Requirements, Servie
and Capability, Mobility Services and Capabilities
WG 2 FAM (Functional Architecture, Req. and Architecture, Functional Req. for NGN Mobility,
and Mobility) Functional Req. for Soft Router
WG 3 QoS (Quality of Services) TR-123.qos, TR-msnniqos, TR-NGN.qos, TR-NGN.NHNperf,
TR-e2eqos.1, TR-enet, TR-atmipa, TR-racs, TR-ipaqos
WG 4 CSC (Control & Signalling) TRQ.IP QoS.SIG.CS1
WG 5 SeC (Security Capability) NGN Security Framework
WG 6 Evol (Evolution) Evolution of Networks to NGN, PSTN evolution to NGN
WG7 FPBN (Future Packet-based Future Packet Network requirements
Network) WTSA 2004. 7 October, Florianopolis Brazil 11
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2. NGN Standardization
NGN Focus Group
Deliverables on Service Requirements and Architecture
WG Title Current Draft Target Release Status
Date
1 NGN Scope FGNGN-OD-00037 1Q05 1 D
1 Services & Capabilities FGNGN-OD-00038 1Q05 1 D
1 Mobility Services & Capabilities TBD 1Q05 1 P
1 NGN Release 1 general requirements FGNGN-OD-00036 2Q05 1 D
1 NGN general requirements (release- TBD 2Q05 RI P
independent requirements)
1 NGN general services and capabilities TBD 2Q05 RI P
(release independent)
D
2 Requirements & Architecture for NGN FGNGN-OD-00035 1Q05 1 D
2 Functional Requirements for NGN FGNGN-OD-00042 1Q05 1 D
Mobility
2 Functional Requirement for Soft Router FGNGN-OD-00043 TBD 2 D
2 Customer Manageable IP Network FGNGN-OD-00044 TBD 2 D
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2. NGN Standardization
NGN Focus Group
Deliverables on Quality of Services
3 A QoS control architecture for Ethernet-based FGNGN-OD-00010 Feb. ’05 1 D
IP access networks (TR-123.qos)
3 Multi Service Provider NNI for IP QoS (TR- FGNGN-OD-00027 Feb. ‘05 1 D
msnniqos)
3 General aspects of QoS and network FGNGN-OD-00045 Feb. ‘05 RI D
performance in NGN (TR-NGN.QoS)
3 Network performance of non-homogeneous FGNGN-OD-00025 Feb. ‘05 RI D
networks in NGN (TR-NGN.NHNperf.).
3 Requirements and framework for end-to-end FGNGN-OD-00032 July ‘05 1 D
QoS in NGN (TR-e2eqos.1)
3 A QoS architecture for Ethernet networks (TR- FGNGN-OD-00026 July ‘05 1 D
enet)
3 A QoS control architecture for ATM-based IP TBD July ‘05 1 P
access networks (TR-atmipa)
3 Resource and admission control sub-system (TR- FGNGN-OD-00031 July ‘05 1 D
racs)
3 A QoS Framework for IP-based access networks FGNGN-OD-00033 July ‘05 1 D
(TR-ipaqos)
3 Performance measurement and management for FGNGN-OD-00024 May ‘05 1 D
NGN (TR-pmm)
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2. NGN Standardization
NGN Focus Group
Deliverables on Signaling, Security, Migration and Future
4 TRQ.IP QoS.SIG.CS1 FGNGN-OD-00030 TBD TBD D
5 NGN Security Framework FGNGN-OD-00034 TBD TBD D
6 Evolution of Networks to NGN FGNGN-OD-00039 1Q05 1 D
6 PSTN Evolution to NGN FGNGN-OD-00040 1Q05 1 D
7 Problem Statement FGNGN-OD-00028 4Q04 TBD D
7 Requirements FGNGN-OD-00029 2Q05 TBD D
7 High Level Architecture TBD 3Q05 TBD P
7 Candidate Technologies TBD 3Q05 TBD P
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3. Key Features
Definition & Features of NGN
A NGN is a packet-based network able to provide telecommunication
Definition services and able to make use of multiple broadband,
of NGN QoS-enabled transport technologies and in which service-related
(Draft functions are independent from underlying transport-related technologies.
Rec. It offers unrestricted access by users to different service providers.
Y.2001) It supports generalized mobility which will allow consistent and
ubiquitous provision of services to users.
Target Standards Area
Generalized Mobility Convergence btw. Fixed & Mobile
Unrestricted Access Open Access I/F
Separation Services with Transport Architecture and Open API
QoS-enabled Transport
Manageable Broadband
Multiple-Broadband
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3. Key Features
Functional Architecture Model
A-1 Application Server Function
Application
(may include own Authentication, Authorization and Accounting)
Network Border
A-2
Application Gateway Function CDR
S-14
S-9
CDR Charging Collection
S.Authentication & Authorization Function Other NGN
Session & Call Control
Function (CCF)
S-10
S-4
S-17 Registration
User Profile DB Function
Function
LS Function CDR
S-13
CDR S-1 PGCF
Session Control Function
S-18 S-11 S-12
CDR CDR
Session Control Proxy Media Resource Control Function MGCF?
Terminal Function
Function other IP MM
T-16 Transport Adaptation T-12 Network
Transport Resource / Policy Control Function SGF (e.g. IMS)
T-18 T. Authentication T-11
NMS
&Authorization Media
Function Resource T-3
T-20 Processing
EMS
T-7 T.Network Access
Access Relay Control Function T-13
Function Internet
Proxy PGF
Function T-4
Transport
Function Traffic CDR
T.Network Access T-15
Process Function Transport Measurement
T-8 Resource & Function CCF
Mobility Support Enforcement
T-6 Function Functions T-9 PSTN/ISDN
T-1
AMGF TMGF
Packet Transport Function
Management
Scope of NGN
All lines of this type attach to the corresponding input line at the CCF
within session & call control Connection point
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3. Key Features
Customer Manageable Capability
• Capabilities to support user manageability on IP network.
• Users can allocate, configure, control, and manage
the resources of NGN Network elements
Manageable NGN Network
C/M-Plane
Soft Switch
Functions Service Management/Call Center
AAA FCAPS Management
Service Control Subscriber Management
Addressing, Naming QoS/SLA Management
Signaling, OAM Routing, Signaling, OAM Various
Server
U-Plane Network
CMTS
CMTS Edge BE Router
Edge BE Router Core BE Router
Core BE Router Edge BE Router
Edge BE Router
Access
Access Existing
Gateway
Gateway Wireline/
Customer Remote Access Switch
Remote Access Switch Ingress LER
Ingress LER Core LSR
Core LSR Egress LER/GW
Egress LER/GW Wireless
Premises Network
Network DSLAM/ONU
DSLAM/ONU Edge MCU Core Multicast Node Edge MCU or GW
Edge MCU Core Multicast Node Edge MCU or GW
PSTN/
Metro
Metro Cable/TV
L1/L2 Node
L1/L2 Node L1/L2 Node
L1/L2 Node L1/L2 Node/GW
L1/L2 Node/GW
Switch
Switch Network
UNIz UNIy UNIx NNIx NNIy NNIy NNIz
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3. Key Features
QoS Aspects of NGN
General reference configuration for NGN QoS, NP and QoE
Man-Machine Network Network Man-Machine
Interface Interface Interface Interface
User TE CPN AN CN AN CPN TE User
Network Performance for NGN
QoE QoE
Quality of Service for NGN
Quality of
Quality of Service Network Performance
Experience
User oriented Provider oriented
User behaviour Service attribute Connection/Flow element attribute
attribute
Focus on user- Focus on user- Focus on planning, development
expected effects observable effects (design), operations and maintenance
User subject Between (at) service End-to-end or network elements
access points capabilities
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3. Key Features
Mobility Aspects of NGN
Mobility
Service Service
Continuity Discontinuity
Seamless
Handover Roaming Portability
Handover
Mobile
Terminal
Access
Node
Border (1) Intra-AN Mobility
(Gateway)
Node Intermediate
Access
Node Mobile
Node
Terminal
Access
Network
NGN CN Border (2) Inter-AN Mobility
Node
Border
Node Border Mobile
(Gateway) Access Terminal
Intermediate
Node Node
Node
Inter-CN Mobility
Access (3)
NNI
Network
Mobile
Border
Terminal
(4)
Inter-TE Mobility
Node Mobile
Border Access
Border Intermediate Node Terminal
(Gateway)
NGN CN Node
Node Node (4) Inter-TE Mobility
Fixed
Access Terminal
Network
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3. Key Features
Evolution Aspects of NGN
• 4 Scenarios for PSTN evolution to NGN
3rd Scenario 4th Scenario
UAM11 UAM31
UAM11 UAM31
AN12 LE1 TE TE TE LE3 AN32
AN12 LE1 TE TE TE LE3 AN32
PBX13 PBX33
PBX13 PBX33
UAM21 UAM41
UAM21 UAM41
AN22 LE2 LE4 AN42
AN22 LE2 LE4 AN42
PBX23 PBX43
PBX23 PBX43
UAM11 UAM31
AN12 LE1 TE TE TE LE3 AN32
PBX13 PBX33
UAM11 UAM31
CS
AN12 LE1 LE3 AN32
CS
PBX13 PBX33
SG SG
SG
PSN
PSN UAM21 UAM41
TG TG
TG TG
AN22 LE2 LE4 AN42
AG21 New AG AG41 New AG
PBX23 PBX43
AN22 PBX23 AN42 PBX43
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4. Future Issues
Standards for Near Generation, not Next
NGN stands for Next Generation, but targeted for Near Generation
NGN could be value added framework for all players :
Users, Operators, Providers and Regulators etc.
NGN could be evolved from Current Generation Network
NGN could be basement for making convergence world
(real Telecommunication World)
NGN Standards could be Globalize rather than Localize
boosting global village and shorten digital divide
ITU-T could be centre of NGN standards
CGN Near GN Next GN
Mobile Packet based Packet based
Access Network Fixed Network
BB Fixed Packet
QOS Mobile
Mobile Based
Mobility Conv. X-casting
Fixed Conv. Tele-Broad
TDM based Access TDM based MM
Access BB conv.
Network Network
Access Network
Broadcasting Net. Broadcasting Net.
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4. Future Issues
Future Issues of NGN Standardizations
• NGN could be infrastructure for Broadband Services/Applications
• NGN could be framework for “Convergence” : F↔M T↔B
NGN - Convergence Model FG NGN Standards
Video Services (TV, movie, etc)
Recommendations &
Data Services (WWW, e-mail, etc)
Telephone Services
Technical Reports
Services Rec. Y.NGN-FRM Rec. Y.NGN-MOB
Rec. Y.NGN-CMIP TR. e2e.qos.1
API TR. atmipa
Transport TR. 123.qos
TR. NGN.qos TR. enet
ACCESS CORE ACCESS
NGN NGN NGN
Release 1 Release 2 Release 3
Future Packets (?)
Ethernet or others IMS Beyond IMS
xDSL Optic
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4. Future Issues
Development of NGN Releases
• Target dates : Realization of NGN
• Services and Capabilities (include Network and Control Capability)
• Architecture and their components
• Specifications for Interfaces, etc.
(?)
End of 2006 (TBD)
I/F 2
End of 2005 (TBD) I/F 1
NGN Release 1
NGN
Release 2
•Services & Capabilities : S&C 1 NGN
•Functional Arc. & Spec. : FA&S 1 Release 3
•IW and Interconnection : IAI 1
•Migration : MIG 1
•S&C 2 = S&C 1+ A2
•FA&S 2 = FA&S 1 + B2 •FPS Based (?)
•IAI 2 = IAI 1 + C2
•MIG 2 = MIG 1 + D2
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5. Conclusion
Simplified Realization Model of NGN
Content-based Delivery Network Infrastructure Convergence
Service Broker Infrastructure Integration
Information Broker Infrastructure Mobility (Uniq. ID)
Terminals / Service
Users Program
Appliances Providers
Providers
S I
E N
R F
V
I B
C R
E O
K
B E
R R
K
NGN Infrastructure
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5. Conclusion
NGN : Nothing new, but upgrading, adding Value
Up-grading
Current
Infrastructure
Adding
Value
Current Generation-Beach Next Generation-Water Park
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