21647743 ngn and ip multimedia
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Next Generation Networks (NGN)
&the IP Multimedia Subsystem (IMS)
Kevin SutherlandManagerCommunications Engineering Section
International Training Program07 September 2006
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What is NGN?... A concept for a framework for evolution of network
architecture and capabilities, as defined by ITU-TRecommendations
ITU-T SERIES Y: GLOBAL INFORMATION
INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND
NEXT-GENERATION NETWORKS
Next Generation Networks Frameworks and functional
architecture models Y.2001 (12/2004) General overview of NGN
Y.2011 (10/2004) General principles and general reference
model for Next Generation Networks
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NGN Definition from Y.2001
Next Generation Network (NGN):
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 enables unfettered access for users to networks and tocompeting service providers and/or services of their choice. Itsupports generalized mobility which will allow consistent and
ubiquitous provision of services to users.
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NGN Definition cntd Practical Description from ETSI
The convergence of the public switched telephonenetwork, the (PSTN) voice network,the wireless networks (WiFi / WiMAX / GSM / UMTS)and the data networks (Internet)
and broadcasting networks & services ?...
Convergence in the Dictionary
from the Latin verb convergere, i.e. to incline together
convergence is a coming together of two or more distinctentities or phenomena
Convergence in Technology
the combination of two or more different technologies in asingle device e.g. taking photos with a mobile phone,reading emails on a refrigerator, TV on your PC or interneton your TV
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Convergence new multimedia devices
Source:http://www.telstra.com.au/abouttelstra/investor/docs/tls 366_stratrevjustinmilne.pdf
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NGN key characteristics A concept, not just a technology Use packet-based data transfer (IP, ATM) Use multiple broadband, QoS enabled transport technologies
Independence of service-related functions from underlyingtransport-related functions, implying open interfaces
Interworking with legacy networks Supports generalised mobility, with presence/location
information
Unrestricted access by users to different services and/orservice providers
Converged services between Fixed/Mobile networks
Meet all Regulatory requirements, e.g. emergencycommunications, security/privacy, lawful interception etc.
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Existing Telecommunications
Benefits:
Worked well for stand-alone systems
Challenges:
Many Networks = High Operational and Interworking Costs Slow to introduce new services
Users require different devices for different services
Difficult to integrate new services or technologies
Services
Transport
& Access
Source: ASTAP05/WS-IP&NGN/13
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Emerging Telecommunications
Services and access technologies only need to interface to the
common transport layer (IP)
Access
Transport
ServicesInternet Protocol
Benefits: Rapid Service Deployment = New Service Revenues
Allow continued growth of the network
Flexible architecture for future growth and new technologies
Allows for competition at individual layers
Challenges: Legacy policy frameworks are challenged by the emerging
telecommunications model throughout the world
Source: ASTAP05/WS-IP&NGN/13
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Access and Service Independence
Each service must beintegrated to a specificaccess technology.
With many servicesconverging it becomescomplex to integratesingle access.
IP provides a commoninterface for access andservices
One point of interfacesimplifies theintroduction of newdevices and services.
video data voice
dsl wi-fi cable
Internet Protocol
video data voice
dsl wi-fi cable
Source: ASTAP05/WS-IP&NGN/13
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Networks in TransitionLower cost and
innovative services drives
network convergence
Corpor
ate
Video
PSTN
Servi
ces
Wireless
Voice
WWW
IP Core Broadcast
PSTN
Toll Bypass
IP
PSTN
Academic
Corporate
WWW
IP
Broadband
1G-2G
GSM
CDMA
IP
CATV
MPEG
IP
Source: ASTAP05/WS-IP&NGN/13
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Core IP/MPLS Networks
User
One schematic view of NGN
DSL
ASP
Network
WEB
ASP
Network
VoD
DOCSIS
IMS
MMS
GSMWi-Fi
Access
Transport
Services
SIP
PSTN
PSAP
Network
E911
Source: ASTAP05/WS-IP&NGN/13
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Driving forces for NGNs
Europe
Ageing networks in need of new equipment
Cost savings, new services North America
Cost savings, new services, competitiveness
Operators: IP core conversion, fixed-mobile convergence,
new service offerings (VoIP, IP-TV)
Asia Pacific Region Mobile users, less investment in legacy infrastructure, new services,
address space limitations, government NGN initiatives
Role-out of new networks in the countries in economic transition
Source: ASTAP05-FR10-PL-30
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Short term issues
Numbering
Regulation of
Standard Telephone
Service
Quality of
Service
Next Generation
Longer term issues
Emergency
Privacy
Security
Competition
Consumer
awareness
Jurisdiction
Core policy areas:
Consumer issues
Competition
Security
Scope for self-regulation
Policy implications.
Source: ASTAP05_WS.IP&NGN-09
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INNOVATION
Source: ASTAP05_WS.IP&NGN-09
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Access, security & interoperability
E-mail
SME E-commerce
PSTN,
NGN, 3G
E-banking
E-tax
Office systems
Intranets
E-business,
Managed
networks,
Corporate
networks
SMS
National security
SECURITYWiFiWiMAX
IP TV,
PVR
INTEROPERABILITY
ACCESSPay TV
spam
Free-to-air &
Satellite b/c
Source: ASTAP05_WS.IP&NGN-09
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ACCESS INTEROPERABILITY
Consumer Competition Security
EmergencyQuality of Service
Rights of redress
Directories
Privacy
Information
Cho
iceSpecial needs
Universal service
ConvergenceBundling
Bottlenecks
Interconnection &
access
Carrierselection
Numb
er portabi
lityMigration
Investment
STANDARDS
Critical InfrastructureViruses & firewalls
Network attack
Disaster recovery
Lawful Interception
Cybercrime
Mis
use
IDENTITY, NUMBERING, ADDRESSING
Source: ASTAP05_WS.IP&NGN-09
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Areas of interest for NGN standards activity International Telecommunications Union (ITU-T)
Study Groups (SG13 lead SG for NGN)
Telecommunication Standardization Advisory Group (TSAG)
NGN Global Standards Initiative (NGN-GSI), since Jan 2006
Built on NGN 2004 Project, Focus Group (FGNGN)
European Telecommunications Standards Institute (ETSI) TISPAN, 3GPP / IMS
Internet Engineering Task Force (IETF) Protocols (IP, SIP, MGCP, ENUM, etc)
Global Standards Collaboration (GSC)
Asia-Pacific Telecommunity (APT) ATP Standardisation Program (ASTAP), NGN Expert Group
Asia-Pacific Economic Cooperation (APEC) Telecommunicationsand Information Working Group APEC TEL
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Defining Standards
Smaller industry fora have helped shape international standards. IETF have developed many of the core NGN technologies (IP, MPLS, SIP, etc.)
3GPP integrated IP-based technologies into an instantiation of the NGN, IPMultimedia Subsystem (IMS)
Release based (ETSI TISPAN r1, 3GPP r7, ITU NGN r1-3) ITU involvement is necessary at the international level to define an
Evolutionary Framework to help solve interworking, mobility andservice definitions issues, but
There could be more pro-active cooperation between the telco andinternet stakeholders
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ITU-T Structural model of Functional components
Transport stratum
Service stratum
Media
Handling
Functions
Access
Functions
OthernetworksOther
networksCustomerFunctions
Transport
UserProfile
Functions
Application Functions
GatewayFunctions
Transport Control
Functions
Control
Media
NNIUNI
Edge
Functions
NetworkAttachment
Control Functions
Core Transport
functions
Core TransportFunctions
AccessTransportfunctions
AccessTransport
Functions
Service and ControlFunctions
Service
User
ProfileFunctions
ManagementFunctions
Ref: http://ties.itu.int/u/fgngn/fgngn/readonly/200504_Geneva/focus_group_reports/FGNGN-MR-0040r1.doc
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Current coverage of FGNGN Release 1
R e s o u r c e a n d
d m i s si o n
C o n t r o l F u n c t i o n s
R
C F
N e t o r k
c c e s s
t t a c h m e n t
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o r e t ra n s p o r tu n c t i o n s
c c e s s T r a n s p o r tu n c t i o n s
N G N
e r i n a l s
u s t o e r
N e t
o r k s
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r o
il e
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u s t o m e r a n d
T e r m i n a l2
u n c t i o n sQoS Aspec t s and one par t o f Cont ro l a spec t( IP QoS s igna li ng Requ i rement ) A par t o f
Re lease 1 coverage
Ref: http://ties.itu.int/u/fgngn/fgngn/readonly/200504_Geneva/focus_group_reports/FGNGN-MR-0040r1.doc
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ITU-T releases
18
TSB
Ta le 2 - List ofRelease 1 Delivera les
131/11, 3/11, 4/117/13PSTN/ISDN emulation and simulation6
131/11, 3/11, 4/117/13PSTN/ISDN evolution to NGN6
131/11, 3/11, 4/117/133
volution o4
Net5 orks to NGN6
134/17, 25/1615/13Security6
equirements4
or6
15
115/11Signalling requirements4
or IP7
oS T6 7
.IP7
oS.SIG.8
S14
1317/12, 3/4, 7/44/13, [Note 3]Per4
ormance measurement and management4
orNGN (T6
-pmm)3
135/114/13,3/136
esource and admission control4
unctions(T6
-rac4
)3
134/139 7
oS architecture4
or3
thernet net5 orks (T6
-enet)3
1323/164/136
equirements and4
rame5 ork4
or end-to-end7
oS in NGN (T6
-e2eqos.1)3
134/13@
ulti Service ProviderNNI4
or IP7
oS (T6
-msnniqos)3
134/139 7
oS control architecture4
or3
thernet-based IP access net5
orks (T6
-123.qos)3
131/113/13, 7/13PSTN/ISDN emulation architecture2
13,19, [Note 4]1/11, 5/19, 2/19, 3/193/13,6/13I@
S4
orNext Generation Net5 orks (IA
N)2
13,19, [Note 4]1/11, 6/13, 29/166/13, 2/19 [Note 4]A
unctional6
equirements4
orNGN@
obility (A 6 @
BC
)2
131/113/13
6
equirements
D
9
rchitecture
4
orNGN (
A 6 9
)2
132/13NGN6
elease 1 requirements1
131/13,2/13NGN6
elease 1 Scope1
AE E
roviF
g SG
[Note 2]
AssociateG
Q H estioF
/sCoorG
iF
atiF
g
Q H estioF
/SG [Note 1]
DeliveraI
le TitleWG
Provisio al allocatio ofNGNFG
elivera les to SG Q estio s
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Continuing ITU-T Work NGN Focus Group (FGNGN) scope complete Nov05
Work continues in the various ITU-T Study Groupsaccording to their allocated tasks (Questions)
SG 13 has a continuing (and lead) NGN Role
The ITU-T has announced a NGN Global StandardsInitiative (NGN-GSI) with the Goal to further
strengthen the ITU-Ts leading role in NGN standardwork
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The ETSI NGN Vision Mobile/Fixed Convergence, based on the IMS platform
A multi-service, multi-protocol, multi-access,IP based network - secure, reliable and trusted
Multi-services: delivered bya common QoS enabled core network.
Multi-access: diverse connectivity networks;fixed and mobile terminals, (Mobile, xDSL, etc)
Not one network, but different networks
that interoperate seamlessly Mobility / Nomadicity of both users and devices
My communications services anywhere, any terminal, anytime
>>> all of this leads to a true Next Generation Network
Source: ASTAP05-WP.IP&NGN-08_ETSI
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IP Multimedia Subsystem as defined by 3GPP
3GPP IMS standards define a network domain dedicated to the
control and integration of multimedia services.
IMS is defined by 3GPP from Release 5 onwards (2002)
3GPP2 equivalent of IMS is the MMD (MultiMedia Domain), fullyinteroperable with 3GPP IMS
IMS builds on IETF protocols
Based upon SIP, SDP, COPs and Diameter protocols
3GPP have enhanced these IETF protocols for mobility
IMS in short
Open-systems architecture that supports a range of IP-based services
over the PS domain, employing both wireless and fixed access
technologies
What is IMS?
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Services and Control
Adds call session control to the packet network (GPRS)
enables peer-to-peer real-time services - such as voice, video over a
packet-switched domain
scalable common service control (based on SIP) gives the ability to manage
parallel user services Media Mixing
Ability to pick and mix various multimedia flows in single or multiple
sessions
Can handle real-time voice, video, data
Connectivity Network Independence
Provides access to IP based services independent of the underlying
connectivity technology (mobile / fixed)
IMS is based upon an open standard with a strong evolutionary advantage
IMS architecture & SIP may be easily extended to provide for new services
What does IMS provide?
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Visited
Network
UE
Home
Network
ASS F HSS
GGSN
S-CSCFP-CSCF I-CSCF
Session control
services
Registration
ASinteraction
Chargingetc.
Access Point toNetwork
Hides Topology& Configuration
First Point ofContact
Privacy Control &QoS
Authorisation
LocalServices:Emergency &
Local Numbering
Diameter Protocol
SIP Protocol
IMS basic componentsCSCF CallState Control Functions
P ProxyI Interrogating
S Serving
UE User Equipment
SLF-Subscriber Location Function
HSS- HomeSubscriberServer
AS Application Server
GatewayGPRS
Support Node
Source: ASTAP05-WP.IP&NGN-08_ETSI
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IMS Architecture
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NGN Releases
Both ITU-T and ETSI are planning a series of phased
Releases of NGN standards. For the ITU-T: -
ARelease is a method of prioritizing by identifyinga set of
services to be addressed in a certain time frame. The ITU-T NGN-
FG should progress the work to define the service requirements
and capabilities needed to realize the services in addition to
definingother associated capabilities as needed to facilitate a
NGN in a first Release. The adoption of a release-based approachwill not prevent other work, such as the development of more
generic (release independent) capabilities, and the collation of
services, requirements and issues for later releases.
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TISPAN NGN Architecture
Access
Network Attachment
Subsystem
P
S
T
NAccess Transport
Network Core Transport Network
IMS
IP
(SIP -based)
IP Multimedia Subsystem(Core IMS )
Resource Control
Subsystem
TISPAN x S Connectivity Network
PSTN/ISDN emulation
Subsystem
PSTN/IS N Emulation to
support legacy terminals
Source: ASTAP05-WP.IP&NGN-08_ETSI
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ETSI TISPAN NGN Roadmap
2006
Towardsa converged Wireline and Wireless NGN Release 3
2007 2008
Release 1 Release 2
200920052004
xDSL,
WLANFTTx Fully
Nomadic
Release 1: bringing multimedia services
Limited mobility/user-controlled roaming
xDSL access focus; Access Network Attachment Subsystem
Release 2 optimizing access resource usage
According to user subscription profile and service use
Corporate users specific requirements
Release 3 introducing full (inter-domain) nomadicity
Higher bandwidth access (VDSL, FTTH, Wi-MAX )
???
2010
Source: ASTAP05-WP.IP&NGN-08_ETSI
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TISPAN NGN Rel-1 Scope
Described in DTR/TISPAN-00001-NGN-R1
Release-1 completed Dec.2005
Major service capabilities
Real time conversational services(Voice & Videotelephony)
Messaging (Instant Messaging, MMS),Presence Management
Legacy services emulation enabling
legacy PSTN/ISDN migration towards NGN Content delivery such as VOD, Video
Streaming, TV-Channel distribution (IPTV)
Network Architecture basis
xDSL access prime focus, also WLAN
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Home Networking standards development
due to the evolution of digital technology (e.g. media coding,
Internet), home networks have evolved towards a complexset of devices supporting services and applications in the
home-based business, information, entertainment and
security/control areas
various standards bodies are developing standards for HomeNetworking applications in this converged environment
Home Networks have a role in Next Generation Networking standards bodies have resolved to collaborate and promote
the development of harmonized Home Networking standards
and related networking standards.
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NGN Consumer Access
Multiple BroadbandAccess Options
xDSLEthernet
Home Shopping
Eth.DTV Tuner
Second Line
VoIP
Residential
Gateway
Live Content
Video on Demand
Games Console
NotebookNotebook
PDAPDA
Cable
Home
Security
Fiber
802.11b/g
Router
Set-top Box
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The Future Home
DSL/Cable
or MSOTelephone
Wireless
camera
Wireless
media
gateway
NAS for
MP3 & Video
Content
Integrated networks, content,
and entertainment systems
Managed Security
Managed Voice
Managed Wireless
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In closing NGN is a concept, not just a technology.
NGN is an attempt by operators to provide a single technology
platform into the future to support converged services
NGN is a global initiative, coordinated by the ITU-T
Robust and open standards are essential to the long term
success of IMS and NGN
Not everyone likes or agrees with the NGN concept
especially large parts of the internet community Regulators will have an interesting time trying to manage what
is likely to become a standards/systems battle between various
players
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Links
ITU-T NGN GSI http://www.itu.int/ITU-T/ngn/index.phtml
ETSI TISPANhttp://portal.etsi.org/portal_common/home.asp?tbkey1=TISPA
N
IETF http://www.ietf.org/
APT/ASTAP
http://www.aptsec.org/Program/ASTAP/EG/NGN/index.htm
GSC http://www.gsc.etsi.org/
DCITA - http://www.dcita.gov.au
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Thank you for your attention
Questions ?...
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