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
30.05.2016
WTSA 2004. 7 October, Florianopolis Brazil
2
1. Why NGN ?
Packet based Environments
Expected Future Transition Trend : End-End Packets
Past : Seper. of Voice & Data Transp.
Circuit Switch.
Access Capa.
Circuit Switch.
Transp. Capa.
Packet Switch.
Transp. Capa.
Present : Sep. of V & D Access
Circuit Switch.
Access Capa.
Packet Switch.
Access Capa.
Circuit Switch.
Transp. Capa.
Packet Switch.
Transp. Capa.
xDSL / FTTx
Future : Integration of V & D Access and Transp.
Near Future : Integration of V & D Transport
Circuit Switch.
Access Capa.
Packet Switch.
Access Capa.
Circuit Switch.
Transp. Capa.
Packet Switch.
Transp. Capa.
Packet Switch.
Access Capa.
Packet Switch.
Transp. 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
Services
(Any/All Applications
e.g. voice , data , video)
Anything & Everything
Internet Protocol
(IP)
Transport
Video Services (TV, movie, etc)
Data Services (WWW, e-mail, etc)
Telephone Services
Everything
(Any & All Network technologies)
Scope
Of
“Internet”
Services
API
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
Reg. a
Pol. B
Reg. b
Service-based Pol./Reg.
Pol. C
Reg. c
Voice Internet Video
Phone
Internet
IP-Net
Pol.
Reg.
M-Ph
NGN
PSTN
MM
Mobile
IP (Future Packet ?) Platform
Pol. X
Reg. x
xDSL/Optic based Fixed-Mobile
Resource-based Pol./Reg.
Current PolicyRegulation
Environment (Vertical)
30.05.2016
New PolicyRegulation
Environment (Horizontal)
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5
1. Why NGN ?
NGN triggering Convergence
Telecom
Telecom. mixed with Broadcast.
Broadcast.
Voice
Voice
Data
Video
Telecom
Network
Broadca.
Network
Telecom
Services
Broadca.
Services
Contents
Video
Data
Start
Convg.
Tele-Broadcast.
Telecom
Network
Broadca.
Network
Telecom
Services
Broadca.
Services
Convg.
NGN
3M*
Services
* 3M : Multimedia, Multiparty, Multicasting
A
B
• Sep. Reg. Authority
• Stable Bus. Structure
• Stable Tech. Infras.
30.05.2016
A
B
A
B
• Sep. defini. (each side) • Comp. btw. Reg. Aut.
• Exten. each Bus. area • Comp. btw. Bus. Play.
• Exten. of Tech. capa.
• Comp. btw. Tech. Inf.
WTSA 2004. 7 October, Florianopolis Brazil
A·B Convg.
• Integ. Reg. Auth.
• Confirmed Bus. Area
• Stable Tech. Infras.
6
2. NGN Standardization
NGN Standardization
ITU-T : NGN Project 2004
(2001 ~ 2004)
ITU-T
NGN
WS
SG 2
SG 9
SG 4
SG 12
SG 11
(01 ~ 03)
3GPP/2
SG 16
Q1
0
Q5
Q16
xDSL
Forum
SG 15
SG 13
Q1
SG 17
Q6
ITU-T JRG-NGN
(2003. 9 ~ 2004. 6)
ATIS
CCS
A
TTC
TTA
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
Y.e2eqos.1
Requirements and framework for end-to-end QoS architecture
for NGN
Y.e2eqos.2
An end-to-end QoS architecture based on centralized resource
control for IP networks supporting NGN services
Y.123.qos
A QOS ARCHITECTURE FOR ETHERNET-BASED IP ACCESS
NETWORK
Y.ipaqos
A QoS Framework for IP based access networks
Y.NGNNHNperf
Network performance of hybrid networks in NGN
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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,
and Mobility)
Req. and Architecture, Functional Req. for NGN 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
Future Packet Network requirements
FPBN (Future Packet-based
Network)
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2. NGN Standardization
NGN Focus Group
Deliverables on Service Requirements and Architecture
WG
Title
Current Draft
Target
Date
Release
Status
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 (releaseindependent requirements)
TBD
2Q05
RI
P
1
NGN general services and capabilities
(release independent)
TBD
2Q05
RI
P
D
2
Requirements & Architecture for NGN
FGNGN-OD-00035
1Q05
1
D
2
Functional Requirements for NGN
Mobility
FGNGN-OD-00042
1Q05
1
D
2
Functional Requirement for Soft Router
FGNGN-OD-00043
2
D
2
Customer Manageable IP Network
FGNGN-OD-00044
2
D
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TBD
TBD
12
2. NGN Standardization
NGN Focus Group
Deliverables on Quality of Services
3
A QoS control architecture for Ethernet-based
IP access networks (TR-123.qos)
FGNGN-OD-00010
Feb. ’05
1
D
3
Multi Service Provider NNI for IP QoS (TRmsnniqos)
FGNGN-OD-00027
Feb. ‘05
1
D
3
General aspects of QoS and network
performance in NGN (TR-NGN.QoS)
FGNGN-OD-00045
Feb. ‘05
RI
D
3
Network performance of non-homogeneous
networks in NGN (TR-NGN.NHNperf.).
FGNGN-OD-00025
Feb. ‘05
RI
D
3
Requirements and framework for end-to-end
QoS in NGN (TR-e2eqos.1)
FGNGN-OD-00032
July ‘05
1
D
3
A QoS architecture for Ethernet networks (TRenet)
FGNGN-OD-00026
July ‘05
1
D
3
A QoS control architecture for ATM-based IP
access networks (TR-atmipa)
TBD
July ‘05
1
P
3
Resource and admission control sub-system (TRracs)
FGNGN-OD-00031
July ‘05
1
D
3
A QoS Framework for IP-based access networks
(TR-ipaqos)
FGNGN-OD-00033
July ‘05
1
D
3
Performance measurement and management for
NGN (TR-pmm)
FGNGN-OD-00024
May ‘05
1
D
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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
Definition
of NGN
(Draft
Rec.
Y.2001)
A NGN is a packet-based network able to provide telecommunication
services and able to make use of multiple broadband,
QoS-enabled transport technologies and in which service-related
functions are independent from underlying transport-related technologies.
It offers unrestricted access by users to different service providers.
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
Multiple-Broadband
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Manageable Broadband
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3. Key Features
Functional Architecture Model
A-1
A-2
Application Gateway Function
S-14
CDR
S-9
User Profile DB Function
S-17
LS Function
Terminal
Function
S-1
S-18
CDR
Session Control Proxy
Function
S.Authentication & Authorization Function
S-10
Registration
Function
CDR
S-13
Session Control Function
S-11
Media Resource Control Function
PGCF
CDR
S-12
MGCF?
T-16
Transport Adaptation
Transport Resource / Policy Control Function
NMS
EMS
Management
other IP MM
Network
(e.g. IMS)
T-12
SGF
T-18 T. Authentication
T-11
&Authorization
Media
Function
Resource
T-20
Processing
T.Network Access
Function
T-7
T-13
Access Relay Control Function
T-4
Function
Traffic
CDR
T.Network Access
T-15
Measurement
Transport
Process Function
Function
CCF
Resource &
T-8
Enforcement
Mobility Support
Functions
T-6
Function
T-1
AMGF
Packet Transport Function
Other NGN
T-3
Internet
PGF
T-9
Transport
Proxy
Function
Session & Call Control
Charging Collection
Function (CCF)
S-4
CDR
CDR
Network Border
Application
Application Server Function
(may include own Authentication, Authorization and Accounting)
PSTN/ISDN
TMGF
Scope of NGN
All lines of this type attach to the corresponding input line at the CCF
within session & call control
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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
U-Plane
CMTS
CMTS
Customer
Premises
Network
Remote
Remote Access
Access Switch
Switch
Access
Access
Gateway
Gateway
Edge
Edge BE
BE Router
Router
Ingress
Ingress LER
LER
DSLAM/ONU
DSLAM/ONU
Edge
Edge MCU
MCU
Metro
Metro
Switch
Switch
UNIz
30.05.2016
UNIy
UNIx
Core
Core BE
BE Router
Router
Core
Core LSR
LSR
Egress
Egress LER/GW
LER/GW
Core
Core Multicast
Multicast Node
Node
L1/L2
L1/L2 Node
Node
NNIx
Edge
Edge BE
BE Router
Router
WTSA 2004. 7 October, Florianopolis Brazil
Existing
Wireline/
Wireless
Network
Edge
Edge MCU
MCU or
or GW
GW
L1/L2
L1/L2 Node
Node
NNIy
Various
Server
Network
L1/L2
L1/L2 Node/GW
Node/GW
NNIy
PSTN/
Cable/TV
Network
NNIz
17
3. Key Features
QoS Aspects of NGN
General reference configuration for NGN QoS, NP and QoE
Man-Machine Network
Interface
Interface
TE
User
Network Man-Machine
Interface
Interface
CPN
AN
CN
AN
CPN
TE
User
Network Performance for NGN
QoE
Quality of Service for NGN
Quality of
Experience
Quality of Service
User oriented
QoE
Network Performance
Provider oriented
User behaviour
attribute
Service attribute
Connection/Flow element attribute
Focus on userexpected effects
Focus on userobservable effects
Focus on planning, development
(design), operations and maintenance
User subject
Between (at) service
access points
End-to-end or network elements
capabilities
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3. Key Features
Mobility Aspects of NGN
Mobility
Service
Continuity
Seamless
Handover
Border
(Gateway)
Node
NGN CN
Border
Node
Border
Node
Service
Discontinuity
Handover
Access
Node
Intermediate
Node
Intermediate
Node
Access
Node
Border
(Gateway)
Node
Access
Network
Mobile
Terminal
(1)
Intermediate
Node
Inter-AN Mobility
Mobile
Terminal
Mobile
Terminal
Access
Node
Intra-AN Mobility
Mobile
Terminal
(3)
Access
Network
Border
Node
Portability
(2)
Border
Node
30.05.2016
Access
Node
Access
Network
Border
(Gateway)
Node
NNI
NGN CN
Roaming
Inter-CN Mobility
(4)
Inter-TE Mobility
(4)
Inter-TE Mobility
Mobile
Terminal
Fixed
Terminal
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3. Key Features
Evolution Aspects of NGN
• 4 Scenarios for PSTN evolution to NGN
3rd Scenario
4th Scenario
UAM31
UAM11
AN12
LE1
TE
TE
TE
LE3
AN32
PBX13
UAM11
AN12
UAM31
LE1
TE
TE
TE
LE3
AN32
PBX33
PBX13
UAM21
UAM41
AN22
LE2
LE4
PBX33
UAM21
UAM41
AN42
PBX23
PBX43
UAM11
UAM31
AN22
LE4
LE2
PBX23
AN12
LE1
TE
TE
TE
AN42
PBX43
AN32
LE3
PBX33
PBX13
UAM11
UAM31
CS
AN12
LE3
LE1
AN32
CS
PBX13
SG
SG
PSN
PSN
TG
TG
UAM21
UAM41
TG
AN22
AG21
New AG
LE2
AN22
PBX23
AN42
TG
LE4
AN42
New AG
AG41
PBX23
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PBX33
SG
PBX43
WTSA 2004. 7 October, Florianopolis Brazil
PBX43
20
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
Mobile
Access
Fixed
Access
Packet based
Network
TDM based
Network
Broadcasting Net.
30.05.2016
Near GN
QOS
Mobility
Fixed
Mobile
Conv.
Access
Next GN
Packet based
Network
TDM based
Network
BB
X-casting
MM
Fixed
Mobile
Conv.
BB
Access
Packet
Based
Tele-Broad
conv.
Network
Broadcasting Net.
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21
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)
Data Services (WWW, e-mail, etc)
Telephone Services
Recommendations &
Technical Reports
Rec. Y.NGN-FRM
Services
Rec. Y.NGN-MOB
Rec. Y.NGN-CMIP
API
Transport
ACCESS
TR. 123.qos
TR. e2e.qos.1
TR. atmipa
TR. NGN.qos
CORE
TR. enet
ACCESS
NGN
Release 1
NGN
Release 2
NGN
Release 3
Future Packets (?)
Ethernet or others
xDSL
30.05.2016
IMS
Beyond IMS
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)
End of 2005 (TBD) I/F 1
NGN Release 1
I/F 2
NGN
Release 2
•Services & Capabilities : S&C 1
•Functional Arc. & Spec. : FA&S 1
•IW and Interconnection : IAI 1
•Migration : MIG 1
•S&C 2 = S&C 1+ A2
•FA&S 2 = FA&S 1 + B2
•IAI 2 = IAI 1 + C2
•MIG 2 = MIG 1 + D2
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NGN
Release 3
•FPS Based (?)
23
5. Conclusion
Simplified Realization Model of NGN
 Content-based Delivery Network Infrastructure
 Service Broker Infrastructure
 Information Broker Infrastructure
Users
Terminals /
Appliances
Convergence
Integration
Mobility (Uniq. ID)
Service
Providers
S
E
R
V
I
C
E
Program
Providers
I
N
F
B
R
O
K
E
R
B
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
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Next Generation-Water Park
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