Business Considerations
for
Migration to IMT-2000
Bosco Eduardo Fernandes
Siemens AG, ICM N PG SP NI IB
Vice President
International Affairs
Email:bosco.fernandes@siemens.com
ITU-BDT
ITU-BDTRegional
SeminarSeminar
on Regional
on IMT-2000
SeminarFor
onArab
IMT-2000
Region
For Arab29.09-2.10,
Region 200329.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
© Siemens, 2003
1
Content
„ The Services Delivery Challenge
„ Services Infrastructure
„ IMS Mechanisms
„ Operators Choice
„ Conclusions
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Services vision
QoS
realtime
low
delay
best
effort
Audio
Audio
Conversation
Conversation
Instant
Instant
Messaging
Messaging
SMS
SMS
Push
Push
to
to Talk
Talk
Video
Video
Conversation
Conversation
Video
Video
Streaming
Streaming
MMS
MMS
Bandwidth
For increased ARPU beyond GSM/GPRS,
UMTS (IMT
-2000) service scenarios include
(IMT-2000)
any combination of applications / services
presented seamlessly to the user
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Traffic Forecast for Mobile Services
350
300
Mbit/
User/
Month
Browsing & Download
250
Messaging
200
Real-Time Multimedia
150
100
Voice
50
(Minutes of Use x 9,6 kb/s)
0
2003 2004 2005 2006 2007 2008
Source: Siemens Mobile Networks Marketing, 2003
Note: Figures include consumer and enterprise traffic
„ Operators need to get ready for an increasing mixture of services over
the PS-Domain
„ Real-time and peer-to-peer services are part of the scenarios
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Services Presentation to the User
Usage
Scenario
IM
UMTS (IMT- 2000) communication scenarios provide any
combination of multimedia services
Push2Talk
Examples are:
Video
Conference
•
•
•
•
text and picture messaging
voice and video conversation
streaming video
Voice, video and data conferencing
„ Services of different categories
should be easy to use and
presented seamlessly to the user
realtime
low
delay
best
effort
Audio
Video
Audio
Video
conversational
Conversation
Conversation
Conversation
Conversation
Push2
Push2
Instant
interactive
Video
Instant
Video
Talk
Talk
Messaging
Streaming
Messaging
Streaming
streaming
SMS
MMS
SMS background
MMS
Services
Categories
QoS
Bandwidth
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Services Deployment and Operation
To increase (and retain) the subscriber base
operators are facing the following challenges:
Enable instant deployment and upgrade of services to stay competitive
Run on a large variety of multi-vendor devices
•
•
•
Mobile terminals
PDAs
PCs, Laptops
Enable seamless service access for the roaming user (VHE)
Allow inter-working of services with other operators
Low per-service CAPEX and OPEX
to earn money on low priced services as well
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Summary: Key Success Factors
– Enable smooth integration of different services from a
user perspective
– Expand the value chain including higher value services
– Build on existing MNO assets (authentication, charging,..)
to create a competitive advantage in service deployments
– Enable access to services from a large device base
– Flexible concept to include 3rd party services
– Keep CAPEX and OPEX low
while deploying multiple new services
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Content
„ The Services Delivery Challenge
„ Services Infrastructure
„ IMS Mechanisms
„ Operators Choice
„ Conclusions
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Network Elements for Mobile PS Services
„ The PS Domain provides connectivity to mobile services based on IP
Terminals
PSTN
PLMN
PS Domain
R
RAN
SGSN
IP
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
Internet
© Siemens, 2003
Enabling Mobile Multimedia Services
„ Introducing multimedia and peer-to-peer services into the mobile PSdomain requires new mechanisms
SIP-enabled
Terminals
-
Using the SIP Session Control is the industry trend
Basic service-support functions are required
(e.g. Session- / Service- / QoS-Control, Authentication, Feature
Interaction, Conferencing Support)
Service
Subscriptions
FI Support
SIP
R
Conferencing
Support
Session-Control
Service-Control
QoS-Control
SIP
RAN
SGSN
PSTN
PLMN
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
IP
29.9-2.10, 2003 Doha, Qatar
Internet
© Siemens, 2003
Enabling Mobile Multimedia Services
„ Inter-working with PSTN / CS-voice services require a media gateway
and a corresponding control function
SIP-enabled
Terminals
ISUP
Service
Subscriptions
FI Support
SIP
R
Conferencing
Support
SGSN
SIP
Session-Control
Service-Control
QoS-Control
SIP
RAN
Gateway
Control
Function
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
Media
Gateway
IP
29.9-2.10, 2003 Doha, Qatar
IP
PSTN
PLMN
TDM
Internet
© Siemens, 2003
Enabling Mobile Multimedia Services
„ The “IP Multimedia Subsystem” (IMS) standardized by 3GPP
provides the required service support functions
„ The resulting benefits for the operator are:
SIP-enabled
Terminals
-
service support functions are implemented once and utilized
by many applications, thus
reducing implementation time and effort for the applications
the standard enables multi-vendor environment
standardized future proof architecture
IMS
MRF
HSS
SubscriptionHSS
Service
SIP
R
Resource
Function
SGSN
SIP
CSCF
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
PSTN
PLMN
Gateway
Control
MGW
Call Session
Control Function
SIP
RAN
MGCF
ISUP
Media
Gateway
IP
29.9-2.10, 2003 Doha, Qatar
IP
TDM
Internet
© Siemens, 2003
SIP-enabled Terminals
Enabling Mobile Multimedia Services
„ Further Enabling Services added to the infrastructure
serve as advanced building blocks for mobile applications
„ Scenarios might include the use of different protocols
(SIP, http, …)
SIP, SIMPLE, HTTP
PS/LS
IMS
Location
Presence
Server
Server
Enabling
Service
ISUP
Server
Server
HSS
MGCF
SIP
HSS
CSCF
SIP
SIP
MGW
PSTN
PLMN
TDM
SIP
R
RAN
SGSN
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
IP
29.9-2.10, 2003 Doha, Qatar
IP
Internet
© Siemens, 2003
Applications for Mobile Services
„ The uniform infrastructure enables smooth integration of
different services from the user perspective
SIP Terminals
Client
IM
SIP, HTTP
Service
Service
SIP, SIMPLE, HTTP
PS/LS
PTT
IMS
Service
Service
Location
Presence
Server
Server
Server
Server
HSS
HSS
…
Service
Service
Enabling
Service
RTP
Applications
MGCF
CSCF
SIP
SIP
ISUP
MGW
PSTN
PLMN
TDM
SIP
R
RAN
SGSN
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
IP
29.9-2.10, 2003 Doha, Qatar
IP
Internet
© Siemens, 2003
Summary: IMS as the service infrastructure (1)
– Enable smooth evolution from existing base of
GSM/GPRS to UMTS/IMT-2000
(W-CDMA, TD-SCDMA, EDGE/GERAN)
– Support multi-vendor environment (open interfaces)
– Inter-working with CS fixed and mobile networks
– Future proof architecture with SIP protocol
– Flexible concept to include 3rd party services
– Use proven GSM evolved mobility management
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Summary: IMS as the service infrastructure (2)
– IMS is an essential part of the 3GPP Release 5 mobile
network specifications, approved in 2002
– 3GPP Release 5 is an ITU IMT-2000 family member,
described by ITU-T Rec. Q.1741.3 which has been
consented for approval by ITU-T SSG in June 2003
– Recommendation Q.1741.3 specifies IMS in terms of
•
the 3GPP network architecture, Core Network entities and interfaces
supporting IMS
•
Stage 1, 2, 3 specifications, including protocol elements, charging,
security for IMS
– Hence IMS is an existing ITU-T standard already
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Content
„ The Services Delivery Challenge
„ Services Infrastructure
„ IMS Mechanisms
„ Operators Choice
„ Conclusions
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
“Single Sign On”
for IMS-based Services
IMS subscribers are authenticated only once
The CSCF invokes the Application Server (AS) only after the successful
subscriber authentication
Application Servers (AS) do not have to authenticate the subscriber
again
The standardized SIM-based user authentication method ensures a high
security level and is independent of the underlying access network
Operators Network
Clients
PS
Domain HLR HSS
UMTS/
GPRS
IP
SGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
IMS
AS
CSCF
GGSN
AS
AS
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
WLAN access to IMS Services
IMS based services can be offered to users through different access
networks (e.g. GPRS, UMTS, EDGE, WLAN, Fixed Network)
WLAN is one of the possible mobile access methods to IMS services (e.g.
in hotels, airports or from home)
Peer to peer voice and video service control is performed by the IMS
based on the same feature set. This is independent of the underlying
transport network
Home Network
Clients
LAN
WLAN
BS
Access
Router
PS
Domain
HLR HSS
IMS
MGCF
AAA
CSCF
AS
PDGW
The Packet Data Gateway (PDGW) supports VPN (IPsec) and the
authentication via AAA/HSS
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
WLAN access to IMS Services
IMS based services can be offered to users through different access
networks (e.g. GPRS, UMTS, EDGE, WLAN, Fixed Network)
WLAN is one of the possible mobile access methods to IMS services (e.g.
in hotels, airports or from home)
Peer to peer voice and video service control is performed by the IMS
based on the same feature set. This is independent of the underlying
transport network
Home Network
Clients
LAN
WLAN
BS
Access
Router
PS
Domain
HLR HSS
IMS
MGCF
AAA
CSCF
AS
PDGW
The Packet Data Gateway (PDGW) supports VPN (IPsec) and the
authentication via AAA/HSS
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
CS Domain Roaming
„ “CS Domain Roaming” ensures the availability of voice services for
IMS subscribers when UTRAN/PS-Domain coverage is not available
„ Terminating Services can still be executed in the IMS before the call is
forwarded to the IMS subscriber who is roaming in the visited network
Home
PS Domain
HLR
Visited 2G
HSS
GSM
CS
Domain
MAP
ISUP
MGCF
TDM
Bearer
MGW
IMS
CSCF
IP
GGSN
„ This concept supports the phased introduction of UTRAN/PSDomain/IMS as a unified network infrastructure for voice and data
services since full UTRAN/PS-domain coverage does not have to be
available form the beginning
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
IMS Roaming
„ The 3GPP standard includes IMS roaming
„ IMS roaming enables optimised routing of IMS bearer traffic (e.g. peer to
peer voice traffic routed directly between the visited networks)
„ Optimised Routing leads to OPEX savings
„ The visited MNO (hosting the P-CSCF) is able to offer local services to
roaming IMS subscribers
Visited A
UMTS/
GPRS
Home A
PS
Domain
IMS
P-CSCF
S-CSCF
GGSN
Visited B
UMTS/
GPRS
Home B
PS
Domain
IMS
P-CSCF
S-CSCF
Bearer Traffic
Signaling
GGSN
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Charging of PS-Services
Usage
Scenario
Differentiated
Charging
IM
PTT
Video
Conference
Event
Content
Apps
Session
Time
Media
Transport
Volume
QoS
Billing
itemized bill
to the enduser
IMS enables standard charging methods to support differentiated billing
(volume, event, session and any combination)
Differentiated billing for different types of services allow competitive
billing strategies
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Summary: IMS Mechanisms
„ IMS enables the operator to build up new IP-based mobile services and
applications under his control
„ IMS provides the capability to offer any mixture of peer to peer real-time and
non-real-time services to increase ARPU and reduce churn rate
„ The IMS based highly scalable common service control infrastructure helps
the operator to keep OPEX low while deploying new services rapidly
„ Using an IP-transport network supports the fix/mobile convergence of those
services by enabling access over any network
„ Faster implementation of applications by re-using IMS service support
functions leads to CAPEX savings
„ IMS service support functions provide value-add
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Content
„ The Services Delivery Challenge
„ Services Infrastructure
„ IMS Mechanisms
„ Operators Choice
„ Conclusions
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
user pays
for service
and access
MNO
HLR
HSS
UMTS/
GPRS
Enabling
Services
Choice of Business Model #1
“Service completely hosted by MNO”
IMS
MNO
Services
Alternative
services access
possible
GW
FW
WLO
ISP/ASP
WLAN
GW
GW
End to End
service delivery
by MNO
Internet
Services
Telco
PSTN
xDSL
Enterprise
GW
LAN
GW
FW
Intranet
Services
Peer to Peer
Service access
Alternative Access
GW
FW
Gateway
Firewall
„ The MNO is able to expand the value chain including higher value
services
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
MNO
HLR
HSS
UMTS/
GPRS
IMS
GW
FW
WLO
WLAN
GW
Revenue
Share
ISP/ASP
User
authentication and
charging by MNO
Alternative
services access
possible
Partner
Services
GW
Telco
PSTN
xDSL
Enterprise
MNO
Services
GW
FW
Service
Contract
user pays
for service
and access
Enabling
Services
Choice of Business Model #2
“MNO provides services with partners”
GW
LAN
GW
FW
Intranet
Services
Peer to Peer
Service access
Alternative Access
GW
FW
Gateway
Firewall
„ The MNO is able to maintain full business relationship to the user while
including 3rd party services in his portfolio
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
user pays
for access
MNO
HLR
HSS
UMTS/
GPRS
Enabling
Services
Choice of Business Model #3
“MNO provides access only”
IMS
GW
FW
WLO
ISP/ASP
WLAN
GW
user pays
for service
Partner
Services
GW
Telco
PSTN
xDSL
Enterprise
MNO
Services
IP-based
Multimedia
Access business
separated from
services business
Operator provides
access to the
Internet allowing
mobile customers
to choose from any
(competing)
services in the web
GW
LAN
GW
FW
Intranet
Services
Peer to Peer
Service access
Alternative Access
GW
FW
Gateway
Firewall
„ The MNO provides access only (“Bit Pipe”)
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Operators Decision Points
IMS
IMS
Do we want to use
standardized
components?
Best
practice
Do we want to provide these
services on a homogeneous
infrastructure?
Do we want to control the
new services beyond
providing the bit-pipe?
Do we want to mix service categories
(conversational, streaming, messaging)
for multi-modal communication?
New MNO
business
opportunities
Do we want to deploy
IP based real-time
and non-real-time
multimedia services?
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
MNO’s choice
of business
model
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Single Platform Advantage
Single infrastructure reduces OPEX
- Single type of interfaces to Admin and Billing
- Central subscriber data base
Single infrastructure reduces CAPEX in the long term
- less effort to implement
- less effort to adapt to existing components
Single infrastructure enables inter-working between applications
- Common functions (e.g. group management)
- Common status information (e.g. presence, location)
Expensive !!
Lower OPEX and CAPEX
Admin1
Admin1
Admin2
Admin2
Admin3
Admin3
Application
Application
Application
Application
Application
Application
A.1
A.2
A.3
InfraInfraInfrastructure structure structure
If
If
Billing
Billing
If
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
Admin
Admin
Application
Application
A.1
Application
Application
A.2
Application
Application
A.3
Infrastructure
If
Billing
Billing
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Service Evolution
QoS
realtime
Audio
Audio
IMS m
Conversation
Conversation
andat
ory
low
delay
PTT
PTT
IM
IM
best
effort
Video
Video
Conversation
Conversation
IMS r
IMS n
SMS
SMS
MMS
MMS
ecom
meVideo
Video
nded
Streaming
Streaming
ice to
have
Bandwidth
„ Stronger demand for an IMS control infrastructure when moving
towards real-time services (e.g. Voice, Video, Conferencing)
„ Starting early on IMS avoids a change of the entire infrastructure
later!
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Summary: Operators Choice
Any operator willing to expand on his PS-Domain business
beyond “Bit-Pipe”, must build up a services infrastructure
Real-time and peer to peer services will be part of the
operator’s portfolio
IMS is designed to allow most efficient deployment of those
new services
The early decision for the right infrastructure is crucial to the
future deployment of seamless services
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Content
„ The Services Delivery Challenge
„ Services Infrastructure
„ IMS Mechanisms
„ Operators Choice
„ Conclusions
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Conclusions (1): Summary
3GPP open multi-vendor standards ensures no “lock-in” to a
particular vendor or radio technology
3GPP2 will use IMS as developed and evolved by 3GPP
Open Mobile Alliance (OMA) is using IMS as basis for access
independent services
IMS already common platform for mobile networks
IMS concepts can be applied to “Wireline” (fixed) networks
for Seamless Service Delivery as well
IMS can become THE common platform (for the migration
from legacy “fixed” networks there is still work to be
done).
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Conclusions (2): Role of ITU-T for
Seamless Service Delivery
Given that:
ITU has extensive leadership in “fixed” networks
IMS leadership is with 3GPP
Open Mobile Alliance is also working on access independent
services
The environment for fixed and mobile networks is different
(legacy systems, regulation, competitive environment,
operators/share-holders, …)
Rather than trying to create unique “NGN”
Recommendations for fixed/mobile/… networks,
it is more effective to accept ITU/3GPP/OMA “core
competencies” and better leverage collaborations!
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003
Thank You
for Your Attention!
ITU-BDT Seminar on Regional Seminar on IMT-2000 For Arab Region
29.9-2.10, 2003 Doha, Qatar
© Siemens, 2003