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There is one video in out ppt so
I am not attaching it( Its bulkyso) .
This will be the sequence.
Find you slides.Slide number 48 ( before
thank you slide)
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IP Multimedia Subsystem
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WHAT IS IMS
It is a complete architecture and framework
that enables the convergence of voice data,
video and mobile n/w technology over an IP
based infrastructure.
It will fill up the gap between two most
successful communication paradigm cellular
and internet technology.
The vision of IMS is to provide cellular access to
all the service that the internet provides.
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HISTORY OF IMS
It was first introduced in 3GPP release5.
SIP was the main protocol during thetime .
Release 6 &7 of the 3GPP to include
additional feature like
o Presence service.
o Group management.
o Interworking with WLAN.
o Fixed broadband access.
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HISTORY OF IMS(Contd.)
After coming to 3GPP2 the IMS was
largley adopts from 3GPP release 5.
OMA(open mobile alliances) plays an
important role on specifying and
developing IMS service
standardization.
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WHY DO WE NEED OF IMS
IMS provides a common platform to reduce
time-to market for rolling out new multimedia
service.
IMS provides multimedia service with quality of
service(QoS) enablement.
It allows operator to charge multimedia session
appropriately.
IMS allows all service to be available
irrespective of user location.
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3 G P P R e le a se C o n ce p t
2 0 1 12 0 1 02 0 0 92 0 0 82 0 0 72 0 0 62 0 0 52 0 0 42 0 0 32 0 0 22 0 0 12 0 0 0
R99 R4 R5 R6 R7 R8 R9 R10
HighSpeed
Accesses
IPCore
Network
Service
s
UM TS HS PA DL HS PA UL LT
E LT
E Ad
vH
S
P
A
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EP C
Co
mm
IM SI
M SMM
Te l
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3GPP Release 5
IMS was first developed as part of Rel 5 in 2002. It is based on IETF
protocols such as SIP and SDP that are very mature. These
technologies have been embraced by the industry as the
signalling mechanism for multimedia applications.
Release 5 (frozen 2002): SA3 added 3 new specifications, e.g.:
TS 33.203 IMS security
TS 33.210 Network domain security: IP layer
3GPP R5 & R7 added MIMO antenna and 16QAM (Uplink)/
64QAM (Downlink) modulation
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MS home
MSvisited
S domainR99 access security
authentication&key agreement security mechanism
agreement
integrity
protection
network domain security
( ) ( - )IMS SIP security Rel 5
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UMTS System: 3GPP R4
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UMTS : 3GPP R5
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W LA N in te rw orkin g in 3 G P P
WLAN access zone can be connected to cellular core
network
& &Shared subscriber database charging authentication( ) WLAN Direct IP access
( )Shared services WLAN 3GPP IP Access
Service continuity is the next step
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WLAN Interworking inRelease 6-7
Scenario 1 - Common Billing and Customer
Care
Single customer relationship Customer receives one bill from the mobile
operator for the usage of both 3GPP and
WLAN services
Does not pose any new requirements on
3GPP specifications
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WLAN Interworking inRelease 6-7
Scenario 2 - 3GPP system based Access
Control and Charging
Authentication, authorization and
accounting are provided by the 3GPP
system
The security level of these functions applied
to WLAN is in line with that of the 3GPPsystem
User does not see significant difference in
the way access is granted
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Scenario 3: Access to 3GPP system PS based
services
Extends 3GPP system PS based services to the
WLAN, e.g. IMS based services, location based
services, instant messaging, presence based
services
Scenario 4: Service Continuity Allows the services supported in Scenario 3 to
survive a change of access between WLAN and
3GPP systems
Change of access may be noticeable to the user,
WLAN Interworking inRelease 6-7
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WLAN Interworking inRelease 6-7
Scenario 5: Seamless services
Provide seamless service continuity between the
access technologies, for the services
supported in Scenario 3
Means minimizing aspects such as data loss and
break time during the switch between access
technologies
Scenario 6: Access to 3GPP CS Services
Allows access to services provided by the
entities of the 3GPP Circuit Switched Core
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IMS Architecture
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Architecture
S SS
Session ControlHSS
CentralizedDatabases
Media Control& Gateways
PSTNG 3GMobileirelessBroadbandWirelineBroadband. /esEnterprize
Services plane( )Application Layer
Session Control Plane( )Session and DB Layer
Media Control Plane(Media Control& )Gateway Layer
Network Plane( )Access and Transport
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Architecture
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IMS Layers
Transport Layer
Control layer
Device Layer , , ,IMS devices such as computers mobile phones PDAs and digital phones are able to connect to the I
.Converge the traditional PSTN network to IP network
( ),rol Function CSCF which handle SIP registration of the end points and process SIP signal messaging o
Service PlaneApplication layer
, , ,e desired application server such as telephony messaging multimedia etc also provide the interface
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Core network
Home subscriber server:-
IP Multimedia Private Identity
IP Multimedia Public Identity
Globally Routable User Agent URI
Wildcarded Public User Identity
Call/session control
A Proxy-CSCF(P-CSCF)
A Serving-CSCF(S-CSCF
An Interrogating-CSCF(I-CSCF
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Contd.
Application servers
SIP AS
IP Multimedia Service Switching Function (IM-SSF
OSA Service Capability Server (OSA SCS)
Functional model
Public Service Identity
Media Servers(MRF) MRFC
MRFP
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Contd.
Breakout Gateway
PSTN Gateways
Signalling Gateway (SGW)
Media Gateway Controller Function (MGCF)
Media Gateway(MGW)
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NGN Interconnection
There are two types ofNext Generation Networking
Interconnection:-
Service oriented Interconnection (SoIx)
Connectivity oriented Interconnection (CoIx)
Charging
Offline Charging
Online Charging
http://en.wikipedia.org/wiki/Next_Generation_Networkinghttp://en.wikipedia.org/wiki/Next_Generation_Networking -
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Fixed Mobile Convergence(FMC)
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IMS Technology Evolution
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IMS Access NetworkIndependence
RNC( )MSC Server
SGSN
GGSN
CNCN
MGW
BSC
/UMTS GPRS/UMTS GPRS
WLANWLAN
CorporateCorporate
-P CSCF
-I CSCF
MRF
MGW
MGCF
IMSIMS
-S CSCF
SIP ApplicationServersSIP Application
Servers
HSS
CDMA 2000CDMA 2000/DSL Cable Modem/DSL Cable Modem
/DSLAM CMTS
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IMS Converged Communications Services Vision
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IMS Common Platform
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Different Service, SingleMedium
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Traditional View
SS7
MSC
SCPHLR
Carrier A/GSM ANSI Network
MSC
HLR
Carrier B/GSM ANSI Network
SCP
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IMS View
UE1
SIP
IMS NetworkCarrier A
IMS NetworkCarrier B
ASsHSS
HSS
ASs
CSCFs CSCFs
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Billing in IMS
Packet/Switch n w
CSCF
SIP
HSS
S S SIP
M
CCF
SCF
CircuitSwitch
/n w
Balance mgmt
Replenishment
Pr
od
uc
t
Ca
ta
lo
g
CONVERGENT CHARGING
Online Charging
Offline Charging
Mediation
Diameter
IMS ApplicationServer
IMSSessionControl
IMS interworkingGateways
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Relationship between useridentities
Benefits of IMS
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Benefits of IMS
hared Resources edia server resources ommon user data ingle user profile across applications ntegrated applications
hared Resources edia server resources ommon user data in gle u ser p rof il e a cr os s a pp lic at ion s ntegrated applications
ession Control ( )ommon Session Control SIP rovides common service policies everages investments across multiple applications
ession Control ( )ommon Session Control SIP rovides common service policies everages investments across multiple applications
ccess Network Agnostic liminates multiple service solutions etwork transparency onsistent services across networks
ccess Network Agnostic liminates multiple service solutions etwork transparency onsistent services across networks
onverged Applications cross Networks ed uc ed de vel op ment c ost s and t ime ,oice Video and data services /rite once use many
onverged Applications cross Networks ed uce d d ev el opm en t c os ts an d t im e ,oice Video and data services /rite once use many
Transport
Control
Applications
DSL Mobile PSTN
Voice
Video
Hosted
Services eb ContentData
SIP
Access
CMTS
Business drivers for IMS
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Business drivers for IMS
- /Customer Lock in Churn reduction Improve margin Improve TTM
( )Time To Market
s stay with an operator e.gn/w data storage network initiated actions, community products etc.
qOne stop shop approach
qLower Opex & Capex.
qAll-encompassing tariff structure for fixed and mobile.
qUnifying platforms across networksqqq
qEnable services to have a shortIntroduction phase to overall PLC (Product
qRevenue Sharing with content provi
IMS Services
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q PUSH-TO-TALK over mobile phone.q Interactive Gamingq Shared foldersq Instant Messaging servicesq Voice Messagingq Voice and Video Telephony
q Video-conferencing.q Real Time Video Sharing.
IMS Services
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M S V e n d o r s
IMS Deployment
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IMS Deployment
Wireless Operator Infrastructure Vendor Service Planned
BT (UK) Undisclosed BT Fusion fixed/mobile
converged phone service
eAccess (Japan) Lucent Multimedia, HSDPA
France Telecom Siemens Fixedmobile convergence
MM02 (UK) Siemens Push-to-talk over cellular (POC), multimedia
conferencingSaunalahti (Finland) Nokia VoIP and rich multimedia to
both mobile and fixedtelephony customers
Telecom Italia Mobile Ericsson and Nokia Video sharing
Telefonica (Spain) Ericsson Converged wireless/wireline
IMS deployment
Telia Sonera(Nordic region)
Ericsson, Nokia, and Siemens Instant messaging, videosharing, gaming amongdifferent mobile operators
TMN (Portugal) Nokia Video sharing
IMS Equipment Revenue
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IMS Equipment Revenue
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44
l o b a l S e r v i c e R e v e n u e
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45
t h i n I M S S y s t e m s R e v e n u e G l o b a
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1.Vendors/ProductAvailability
2.Internal businessprocesses
3.Interoperability
4.Interfaces frominfrastructure toapplications
5.Integration with legacy
o r C h a l l e n g e s i n I m p l e m e n t i n
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, , ,SIP RTSP RTP and
HTTP
pplication Layerransport Layer
etwork Layer
Malformed packetsFloods DoS attacksHijacking
Attack
Layers
DoS
Attacks
Unauthorized access Theft of service Theft of bandwidth
Revenue
Attacks
Mutual Authentication IPSec or TLS Encrypted Signaling IPSec Encrypted Bearer Data
SecureAccess
TCP and UDP IP and ICMP
S e c u r i t y
t M a t u r i t y D e m a n d D r i v e r s a n d R i s k
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48
,
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Thank You