WORKSHOP ON NEXT GENERATION NETWORKS
AND APPLICATIONS
(Athens, Greece, 8 May 2009)
NGN Case Studies
Chaesub Lee
Chairman of ITU-T SG13
Athens, Greece, 8 May 2009
Contents
1.
2.
3.
4.
Migration towards NGN
NGN Case Study
Field Trial of NGUN
Conclusion
Athens, Greece, 8 May 2009
1. Migration towards NGN
Drivers of Network Migration – General Motivation
• New services and revenue increase with multimedia services
− Compensate voice revenue reduction and increase BB
related business
− Providing Service innovation (e.g. VPN)
− Decreased time to market
• Cost reductions by sharing network infrastructure and systems
− Savings are a function of network scenario, equipment
modernization status and customers grow speed
− Evolving legacy networks to NGN: Reduced OPEX and
streamline operations
• Simplification of O&M
− Integrated operation platforms, maintenance and training
− Centralized Management and Control
Athens, Greece, 8 May 2009
1. Migration towards NGN
Drivers of Network Migration – Operators view
• Business continuity required to maintain ongoing dominant
services and customers that require carrier-grade service
• Flexibility to incorporate existing new services and react
quickly to the ones that appear on real time (main advantage of
IP mode)
• Profitability to allow feasible return on investments and in the
best practices market values
• Survivability to allow service assurance in case of failures
and external unexpected events
• Quality of Service to guarantee the Service Level Agreements
for different traffic mixes, conditions and overload.
• Interoperability across networks to allow to carry end to
end services for flows in different network domains
Athens, Greece, 8 May 2009
1. Migration towards NGN
Architecture: Existing Networks
REGIONAL LAYER
• Hierarchical topology with 4
to 5 layers, connectivity to
the upper next layer and
within each layer as a
function of economical
optimization
LEX
LAYER
• Number of nodes as a
function of O/D traffic and
nodes capacity
TRANSIT NETWORK
NATIONAL LAYER
RU
LAYER
customers
LAYER
Athens, Greece, 8 May 2009
• Service handling for media,
signaling and control at all
exchange nodes
• Carrier grade quality with
well defined QoS criteria
and standardized
engineering rules
1. Migration towards NGN
Genera direction for evolving Network Architecture
TRANSIT NETWORK
NATIONAL LAYER
REGIONAL LAYER
LEX
LAYER
RU
LAYER
Single-layered
NATIONAL/REGIONAL
Structure
Simplification
LAYER
LEX/GW
LAYER
RU
LAYER
Athens, Greece, 8 May 2009
TRANSIT NETWORK
1. Migration towards NGN
Access Network Structure: Mixed Access
Local: ~ 40 km
Distribution: mean value ~1,7 km
Drop: mean value ~300 m
branching cables
SDF
.
.
FO
SDF
.
Optical
Interface
LEX
GW
MDF
DLC
SDF
FO
DLC
drop line
.
.
Local Exchange
Gateway
Main Distribution Frame
Digital Loop Carrier
Subscriber Distribution Frame
Fiber Optic
DLC
Athens, Greece, 8 May 2009
.
.
.
DLC
SDF
LEX/GW
drop line
NTBA
1. Migration towards NGN
Emulation scenario
UNI
UNI
ADF2
User
equipment
NGN
ADF2
User
equipment
An encapsulation process
All services available to PSTN/ISDN
users
User experience not changed by the
network transformation
Athens, Greece, 8 May 2009
1. Migration towards NGN
Simulation scenarios - 1
UNI
UNI
NGN
User
equipment
User
equipment
PSTN/ISDN-like services available
Availability of possible new services
User experience is changed by the
network transformation
Athens, Greece, 8 May 2009
1. Migration towards NGN
Simulation scenarios - 2
UNI
UNI
NGN
User
equipment
ADF1
User
equipment
o Only PSTN/ISDN-like services available
o New experience for legacy terminal
users
Athens, Greece, 8 May 2009
1. Migration towards NGN
Overall architecture
Simulation
NGN
(Carrier Y)
PLMN
User
equipment
User
equipment
NNI
IWF
UNI
UNI
NGN
(Carrier X)
ADF1
User
equipment
UNI
ADF1
ADF2
ADF2
UNI
IWF
IWF
User
equipment
NNI
PSTN/ISDN
Public IP
Network, e.g.
SIP (non-IMS)
User
equipment
UNI = User Network Interface = IF1
NNI = Network Node Interface = IF2
Athens, Greece, 8 May 2009
User
equipment
Emulation
ADF= Adaptation Function
IWF=Interworking Function
2. NGN Case Study
Key Motivation for introducing NGN
• Improve Infrastructure
− Replacement of Legacy
Telecommunications: All IP
− Deployment of Broadband
• Enhancing Society: e-Society
− Fixed Mobile Convergence
− Various applications: e-health, USN etc.
Harmonization
Athens, Greece, 8 May 2009
2. NGN Case Study
21CN - current UK network
PSTN
Copper
Leased lines
PSTN
KStream
DSL
ATM
PDH
access
Fibre
SDH
access
IP
SDH
VC-12
SDH VC-4
PDH
access
PDH
End
User
~5.5k
sites
Athens, Greece, 8 May 2009
~2k
sites
~1k
sites
~300
sites
~100
sites
~15
sites
2. NGN Case Study
21CN - simplified UK network
Multi-service access
Converged core
Class 5
Call Server
Copper
WWW
DSL
Fibre &
Copper
IP-MPLS-WDM
Agg Box
Content
Wireless
End
User
~5.5k
sites
Athens, Greece, 8 May 2009
~100
sites
ISP
2. NGN Case Study
Vision and Goals of Korean NGN
- Build a state of the art information infrastructure in the world
Vision
- Create an environment to use high-quality multimedia services
- Prepare core foundation of IT Industry growth momentum
- Build an integrated network with the bandwidth of 50 ~ 100Mbps that can
offer seamless multimedia services to 20mln wired or wireless service
subscribers between the heterogeneous networks
1,500,000
Goals
Wired
(50~100M)
2005

500,000
2005
Athens, Greece, 8 May 2009
2007

2010
10,000,000
3,500,000


Wireless
(50~100M at most)
10,000,000
4,500,000
2007
2010
2. NGN Case Study
Broadband Converged Network (BcN)
Integrated network of the next generation, where the users can
safely access to BcN multimedia services ;quality-secured
integrated Voice/Video/Data at anywhere and anytime
Applied Services
Open API
QoS
Integrated Wired & Wireless
Wireless BcN
Wired Telecom
Telecom
FTTH
Home Network
Athens, Greece, 8 May 2009
Security
IPv6
Integrated Voice & Data
Telephone
Internet
u-Sensor Network
Integrated Telecom & Broadcasting
CATV
Muti-purpose Information Terminals
DMB
2. NGN Case Study
Overall Roles of BcN
Government
Company
Individual
R&D Center
· e-Congress · e-Politics
· e-Government
· e-Trade · e-Banking
· ERP / CRM / SCM
· e-Health · e-Learning
· home networking
· IT New Growth Engine
· BT/NT Ubiquitous · Grid
Korea NGN (BcN)
Infrastructure
Fixed/Mobile
Communication
Network
Digital Technology
Digital Data
101001101
•Digitalization
Athens, Greece, 8 May 2009
Internet
Network Technology
Broadcasting
Computing Power
Network
•Wide Network Coverage
•Enhanced Computing Power
2. NGN Case Study
1st Step (2004 ~ 2005)
OSS/BSS
PP
CP
Comm. server
Softswitch
Broadcasting
server
Open API G/W
Broadcasting
network
(IPv4/MPLS)
AGW
3G
VDSL
PSTN
Service Convergence
between Wired and Wireless
Expansion of FTTC(VDSL/HFC)
Introduction of New Service
HFC
Home Network(IPv6)
Athens, Greece, 8 May 2009
Integration of Voice and Data network
based on Open Architecture
DMB
FTTH
Terrestrial DMB, Satellite DMB
IPv6 based Home Network
2. NGN Case Study
2nd Step (2006 ~ 2007)
OSS/BSS
CP
PP
Wire+Wireless+Broadcasting
Server
Softswitch
QoS/Security
Control Server
Open API G/W
Transport layer based IP Broadcasting
(IPv6/MPLS)
network
AGW
Convergence of
Wired & Wireless network
Transport layer based IPv6/MPLS
Service Convergence of
Communication & Broadcasting
Expansion of FTTH
3G
WLAN
FTTH
VDSL
DMB
HFC
Home Network/u-sensor Network
Athens, Greece, 8 May 2009
Introduction of New Service
HPi and interactive DMB
Ubiquitous Sensor network
2. NGN Case Study
3rd Step (2008 ~ 2010)
Converged Service Over
Single Transport Layer
OSS/BSS
CP/PP
Application
Server
Integrated
Softswitch
Open API G/W
QoS/Security
Control Server
Integrated Network based IP (IPv6/MPLS)
OXC
AGW
4G
Hpi,WLAN
HFC, FTTH
DMB
Intelligent Home Network/ u-sensor Network
Integrated Terminal
Athens, Greece, 8 May 2009
Voice Network
Internet
Mobile Network
Broadcasting
High-speed Data Network
Supporting New Service
Requirements
Broadband
QoS
Security
Mobility
Multicasting
3. Field Trial of NGUN
Overall Model of NGUN
NGUN
Services
Disaster/crisis
management
Structural health
Logistics, SCM monitoring
NGUN Applications
Agricultural control
U-Health care
Ubiquitous
web services
SN
Directory service
Access
Network
Mobile
RFID
Reader
NGUN
Networks
Disaster SurveillanceMilitary Field
Context modeling
and management
Contents management Spatial info management
Management
Access
Network
Access
Network
Access
Network
SN Gateway
Sensor node
RFID
Reader
SN Gateway
NGUN Middleware
NGN,
Internet,
etc.
Access
Network
Access Gateway
SN Gateway
End Devices/
Networks
3. Field Trial of NGUN
Application to Climate Change subject

Solution against climate change
A global issue in ICT fields as well.
ITU is holding two symposia on ICTs and climate change.
Wiscons
in Univ.
2004
Antarctic ice
chunk collapsing
Glacier shrank,
Mountain
LHOTSE,
Himalayas
1916 and 2001,
Chamonix, Switzerland
(Source: Green peace,
Paris)
Athens, Greece, 8 May 2009
3. Field Trial of NGUN
Application to ‘Weather Information Service’
SNSP #2
SNSP #3
Raw data
Sensed data
Emergency
Management
Center
Sensor networks
service provider
#1
Collect/Analysis/
Process/Estimate
environmental
info
Value-added service providers
Weather info, local nature info, security, healthcare, etc.
Athens, Greece, 8 May 2009
National Disaster
Monitoring Center
Raw or
Value-added
sensed data
Consumer services
SMS/Email/Call/Multimedia, etc.
Value-added sensed
data
3. Field Trial of NGUN
Application to Healthcare Service
Sensed
data
Connecting to
insurance
NGUN Healthcare
service provider
Collect/Analysis/
Process/Estimate
vital body signs
Connecting to
hospital
Sensors on Patients
Raw or
value-added
sensed data
Status report to
family
Monitoring vital signs
Value-added service providers
Weather info, local nature info, security, healthcare, etc.
Athens, Greece, 8 May 2009
Emergency call
3. Field Trial of NGUN
Application to restructuring infrastructure - Korea
After 2005.10
Athens, Greece, 8 May 2009
Before 2005.10
3. Field Trial of NGUN
Application to restructuring infrastructure - Korea
PDA
802.11a/b/g
Wireless NIC
Mesh Node
Laptop
PC
Node
1
580m
Node
2
City hall
180m
DVI
Cable PC
Node
5
LCD Panel
Node
6
Node
150m
3
Node
4
170m
260m
802.11a/b/g
Wireless PCI
Adapter
WiFi -AP
2.4GHz
Node
8
180m
Node
7
5m
AP
5m
Node10
WiFi
Mesh
Node
190m
390m
WiFi
Mesh
Node
PoE Cable
Street light Mesh
Node/AP
Node
9
350m
Node11
840m
100Base T
740m
100Base T
Switch
WiFiMesh
Node12
5GHz
Switch
510m
Node13
210m
Node14
• Sensors everywhere
• Monitoring every managed objects
Dissolved oxygen serial
• Managing street lights, road traffic,
city facilities, stream and air
pollutions, road freezing and
flooding, etc.
temperature
PH
serial
serial
WiFi -AP
Zigbee
2.4GHz
2.4GHz
[Gateway Node]
750m
860m
Node15
Node1
330m
6
Zigbee
2.4GHz
[water level sensor]
serial
sensor TransmitterComm. device
Athens, Greece, 8 May 2009
District
office
Water quality
Comm. device
Transmitter
Source: Samsung SDS, 2007
4. Conclusion
Life with NGUN
Urban areas
Office
• Routing support to permit seamless
roaming
• Provide location-aware and
personalized advice for vehicle drivers
• Collaboration with other group using
multimedia conference  reduce cost
• Create new business from real-time
and location-based commerce
Ubiquitous
Networking
Public facilities
• Real-time congestion and weather
information-based traffic
management  increase road
capacity
• Monitoring secular change of road and
building  prevent accident
Athens, Greece, 8 May 2009
Home
• The home is constantly monitored
(even inhabitants’ medical conditions)
• Support social connections of elderly
people
Thank you for
your attention !!!
Athens, Greece, 8 May 2009