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Mobile Core Evolution to IMS
Elena Romero,
IMS Sales Manager
© Ericsson AB 2005
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Why IMS?
IP Multimedia Subsystem (IMS) is a standardised architecture (defined by
3GPP/3GPP2) for offering services on the packet domain.
It is a generic architecture for offering multimedia services.
IMS is independent of Access, supports: UMTS, GPRS, fixed line, WLAN etc.
IMS Communication
Pre-IMS Communication
Voice
Voice
SMS
Instant Messaging
MMS
Video Conferencing
Application sharing
Others
SMS
Instant
Messaging
MMS
1)
2)
3)
4)
Decide on communication mode/media
Create content
Send/call the chosen person
Disconnect and reconnect if changing media
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1)
2)
3)
4)
2
See who is available beforehand (presence)
See which mode/media to use
Contact and create content
Change media in real time
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Why IMS- operator perspective?
How can IMS solve these issues?
Increased competition from VoIP
service providers
Provide IP Telephony
Rapid broadband roll-out
due to access deregulation
Fight back competitors
Wireline & Wireless
Operators
Increase ARPU and
reduce churn via new
attractive services
Bundled services
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Secure valuable position
in the value chain
Be more than a bit-pipe provider
Improve net income via reduced costs and
new multimedia
services
Cost efficient solution
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The core of IMS
Combining the best of two worlds
Performance and scalability
characteristics of the
Telecom Industry Solutions
Open, flexible service development
ability of the Datacom industry
IMS
Datacom Industry
Telecom Industry
Standardized, end-2-end services that are interoperability tested
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Standardization Bodies related to
IMS
UE
Application Server
OMA/TISPAN
Presence Client
POC Client
GM Client
Presence Server
POC Server
GM Server
e2e Services
Standards secures interoperability and gives
ISC
quicker consensus
3GPP IMSin the industry
Service Enabling Framework,
e2e Infrastructure
e.g. Presence FW
GM, Presence, Session
Control Interface etc
P-CSCF
HSS/SLF S-CSCF
I-CSCF
MRFC
MRFP
SigComp SIP
SDP H.248
Diameter
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MGCF
BGCF
IETF
ZZZZ
IP ”Toolbox”
Radius
XXXX
YYYY
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All-IP network- target network
Multimedia services via IMS and SIP
Service
Layer
Common support functions
Control
Layer
TeS
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IMS
MSS
IP Network
Conn.
Layer
Access
Layer
Applications & Content
Fixed
Wireless
BB Access
6
2/3G Access
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Efficient evolution to all-IP
Different paths depening on operator situation - 4 key trends
Service
technology
Service
technology
Application driven fixed
operators:
IMS
-Introduce new services
-Introduce IP infrastructure
-Evolve voice network
SS
CS
IMS
SS
CS
Time
Service
technology
Softswitch and network
evolution centric fixed
operators:
IMS
SS
CS
Softswitch and network
evolution centric mobile
operators:
IMS
IMS
-Modernize voice network
-Reduce network costs
-Introduce IP infrastructure
-Introduce IMS based services
-Introduce new services
-Introduce IP infrastructure
-Evolve voice network
Time
Converged
operators
Service
technology
Application driven mobile
operator:
SS
CS
CS
Time
-Modernize and expand voice
network
-Reduce network costs
-Introduce IP infrastructure
-Introduce IMS based services
Time
Fixed operators
© Ericsson AB 2005
Mobile operators
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Network centric mobile operator
Starting point
Need
Needfor
formodernization
modernization
TDM
Need
Needfor
forless
lessnodes
nodes
Need
for
a
Need for aless
lesstrunks
trunks
TDM
Create
Createan
anIP
IPcore
corenetwork
network
for
forpayload
payloadand
andsignaling
signaling
Other
Networks
Reduce
Reducecosts
costs
Need
Needfor
forhigh
highbandwidth
bandwidth
access
accesssupport
support
TDM
TDM
TDM
E1, STM-1, STM-4
(Trunks)
TDM
TDM
Wireless access
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MobileSoftswitch
Softswitch
Introduction of softswitchesMobile
Controls
ControlsMGW
MGWvia
viaH.248
H.248
Reduced costs, IP core network
100
100%
%PSTN
PSTNEmulation
Emulation
Handles
Handlesall
allthe
thecall
callcontrol
control
Supports
multiple
Supports multiple
interconnect
interconnectprotocols:
protocols:xxxx
xxxx
Other PSTN/ISDN
Network
MSS
Internet
TDM
MGW
MGWperforms
performslocal
local
switching
switching
transmission
transmissionsavings
savings
GGSN
TDM
Media
Gateway
Media
Gateway
IP/MPLS Network
IP
IPCore
Corenetwork
network
Major
Majorsavings
savingsdue
duetotoIP
IP
transport
Media
transportand
andsignaling
signaling
Gateway
Service
Serviceassurance
assuranceand
and
SGSN
network
networkredundancy
redundancyvia
via
Diffserv
Diffservand
andMPLS
MPLS
Savings
Savingsdue
duetoto
compression
compression
2G/3Gaccess
Access
Wireless
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Modernization of access network
Support for mobile broadband
Other PSTN/ISDN
Network
Internet
MSS
Multiple
Multipleaccess
accessalternatives
alternatives
Support
Supportfor
forGSM/GPRS/EDGE
GSM/GPRS/EDGE
access
access
Support
Supportfor
for3G
3Gaccess
accessincluding
including
HSDPA
HSDPA
GGSN
Media
Gateway
IP/MPLS Network
Media
Gateway
Media
Gateway
SGSN
2G/3G Access
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Introduction of IMS
Stepwise introduction of IMS based services
Other PSTN/ISDN
Network
PSTN
PSTNemulation
emulation
domain
domain
MSS
MSScontrolled
controlled
Telephony
Telephonyover
overIP
IP
Common
CommonIP
IP
backbone
backbonewith
withDiffserv
Diffserv
and
andMPLS
MPLS
SIGTRAN
SIGTRANsignaling
signaling
AS
Internet
IMS
MSS
SIP
Media
Gateway
GGSN
IMS
IMSdomain
domain
IMS
IMS&&Application
Application
controlled
controlled
Multimedia
Multimediaservices
services
PTT
PTT
weShare
weShare
Presence
Presence
Etc.
Etc.
IP/MPLS Network
Media
Gateway
Media
Gateway
SGSN
2G/3G Access
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IMS as key service enabler
Mobile IP Telephony a reality- all services via IP (SIP)
Other PSTN/ISDN
Network
AS
Internet
IMS
MSS
SIP
GGSN
IMS
IMSdomain
domain
IMS
IMS&&Application
Application
controlled
controlled
Mobile
MobileIP
IPTelephony
Telephony
SIP
to
the
SIP to theend
end
device
device all-IP
all-IP
Media
Gateway
IP/MPLS Network
Media
Gateway
Media
Gateway
SGSN
2G/3G Access
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Add fixed access
A fully converged network
Other PSTN/ISDN
Network
Fixed
Fixedservices
servicesoffered
offered
via
viaIMS
IMS
Network
Networkconvergence
convergence
AS
Internet
IMS
Server
SIP
GGSN
Media
Gateway
IP/MPLS Network
Media
Gateway
Media
Gateway
SGSN
2G/3G Access
Wireline access
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Provide a multimedia experience
Enabling richer communication for end users
Add
Addaaonline
online
game
game
Presence
Add
AddInstant
Instant
Messaging
Messaging
Add
Addaavideo
video
support
support
Game session
Instant messaging
Basic
Basicvoice
voice
session
session
Video session
Voice
Richer communication enabled by IMS
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Combinational Services
A combinational service is created by combining a CS speech call
and one or more PS media streams
The services that are mixed have the same A-and B-party and,
when combined, appear as a single task to the end-user
Circuit switched
Voice
Video, data ...
Packet
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switched
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Broad application spectra
Legacy and value
added voice services
(IN, Parlay)
Standardized services
for Mass-market
Defining
services
Differentiating
services
Media
AS
AS
AS
AS
AS
AS
GW
CSCF
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What is being said about IMS
Comments from previous IMS conferences
“We will achieve more in 5 years
than we have done the last 20!”
“Pre-standard services threats long
term business potential”
European operator
“Availability of IMS-enabled devices
– key for success”
European vendor
“Our goal - excellence in user
experience”
European operator
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