Service Delivery in IMS –the PoC case study
DRAFT
1
报告人简历
Dirk Weiler : Vice President of Siemens Information and Communication Mobile, based in Munich, Germany, is responsible for all standardization and fora activities of Siemens Mobile Networks worldwide. He has 18 years of experience in mobile communication. After his graduation in Physics from the University of Cologne in 1985, he started working for Siemens in the development of the analog mobile communication system C450. He hold various management positions in the areas of development, research, intellectual property, standardization and marketing. Since 1988 he has been working actively in standardization in ETSI, 3GPP, ITU, IETF.
DRAFT
Service Delivery in IMS –
the PoC case study
CCSA Workshop on OMABeijing, 20 August 2003
Dirk WeilerVice President Standardization and Fora,
Siemens Information and Communication Mobile
3Service Delivery in IMS –the PoC case study
DRAFTContent
The Services Delivery Challenge
Services Infrastructure
Operators Choice
The PoC case study
4Service Delivery in IMS –the PoC case study
DRAFTServices vision
Bandwidth
real-time
lowdelay
besteffort
QoS
VideoConversation
VideoConversation
AudioConversation
AudioConversation
VideoStreaming
VideoStreamingInstant
MessagingInstant
Messaging
SMSSMS MMSMMS
For increased ARPU beyond GSM/GPRS,For increased ARPU beyond GSM/GPRS,UMTS (IMT-2000) service scenarios includeUMTS (IMT-2000) service scenarios includeany combination of applications / servicesany combination of applications / services
presented seamlessly to the userpresented seamlessly to the user
For increased ARPU beyond GSM/GPRS,For increased ARPU beyond GSM/GPRS,UMTS (IMT-2000) service scenarios includeUMTS (IMT-2000) service scenarios includeany combination of applications / servicesany combination of applications / services
presented seamlessly to the userpresented seamlessly to the user
Pushto TalkPush
to Talk
5Service Delivery in IMS –the PoC case study
DRAFT
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
Mbit/
User/
Month
Browsing & Download
Messaging
Real-Time Multimedia
Voice (Minutes of Use x 9,6 kb/s)
Source: Siemens Mobile Networks Marketing, 2003
50
100
150
200
250
300
350
2003 2004 2005 2006 2007 20080
Note: Figures include consumer and enterprise traffic
Traffic Forecast for Mobile Services
6Service Delivery in IMS –the PoC case study
DRAFTServices Presentation to the User
UMTS (IMT- 2000) communication scenarios provide any combination of multimedia services
Examples are:- text and picture messaging- voice and video conversation- streaming video- Voice, video and data conferencing
UsageScenario
IMIM
Push2TalkPush2Talk
VideoVideo
ConferenceConference
Bandwidth
real-time
lowdelay
besteffort
QoS
VideoConversation
VideoConversation
VideoStreaming
VideoStreaming
InstantMessaging
InstantMessaging
SMSSMS MMSMMS
AudioConversation
AudioConversation
Push2Talk
Push2Talk
conversational
streaminginteractive
background
Se
rvic
es
Ca
teg
ori
es Services of different categories
should be easy to use and presented seamlessly to the user
7Service Delivery in IMS –the PoC case study
DRAFTServices Deployment and Operation
To increase (and retain) the subscriber baseoperators 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
Allow inter-working of services with other operators
Low per-service CAPEX and OPEXto earn money on low priced services as well
8Service Delivery in IMS –the PoC case study
DRAFTContent
The Services Delivery Challenge
Services Infrastructure
Operators Choice
The PoC case study
9Service Delivery in IMS –the PoC case study
DRAFTNetwork Elements for Mobile PS Services
GGSNRAN SGSN
PS DomainPS Domain
IP InternetR
PSTNPLMN
The PS Domain provides connectivity to mobile services based on IP
Terminals
10Service Delivery in IMS –the PoC case study
DRAFTEnabling Mobile Multimedia Services
GGSNRAN SGSN Internet
Session-ControlService-Control
QoS-Control
ServiceSubscriptionsFI Support
R
SIPSIP
IP
PSTNPLMN
Introducing multimedia and peer-to-peer services into the mobile PS-domain requires new mechanisms
- 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)
ConferencingSupport
SIP-enabledTerminals
11Service Delivery in IMS –the PoC case study
DRAFTEnabling Mobile Multimedia Services
GGSNRAN SGSN Internet
GatewayControl
Function
MediaGateway
PSTNPLMN
SIPSIP
ISUP
SIP
IPIP
TDM
R
Inter-working with PSTN / CS-voice services require a media gateway and a corresponding control function
SIP-enabledTerminals
Session-ControlService-Control
QoS-Control
ServiceSubscriptionsFI Support
ConferencingSupport
12Service Delivery in IMS –the PoC case study
DRAFTEnabling Mobile Multimedia Services
GGSNRAN SGSN Internet
CSCFCall Session
Control Function
HSSSubscription Service
HSS
MRFResource Function
MGCFGatewayControl
MGWMedia
Gateway
PSTNPLMN
SIPSIP
ISUP
SIP
SIP-enabledTerminals
IMSIMS
IPIP
TDM
R
The “IP Multimedia Subsystem” (IMS) standardized by 3GPP provides the required service support functions
The resulting benefits for the operator are:- 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
13Service Delivery in IMS –the PoC case study
DRAFTEnabling Mobile Multimedia Services
GGSNRAN SGSN Internet
MGCF
MGW
PSTNPLMN
ISUP
IMSIMS
IPIP
TDM
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 LocationServer
LocationServerPresence
ServerPresence
Server
EnablingEnablingServiceService
R
SIPSIP
SIP
-en
ab
led
Term
inals
PS/LSPS/LS
CSCFCSCFHSSHSS HSS
SIP
SIP
14Service Delivery in IMS –the PoC case study
DRAFT
…Service
…Service
Applications for Mobile Services
GGSNRAN SGSN Internet
MGCF
MGW
PSTNPLMN
ISUP
IMSIMS
IPIP
TDM
SIP, SIMPLE, HTTP LocationServer
LocationServerPresence
ServerPresence
Server
EnablingEnablingServiceService
R
SIPSIP
SIP
Term
inals
PS/LSPS/LS
CSCFCSCFHSSHSS HSS
SIPR
TP
ApplicationsApplicationsClientClient SIP, HTTP
PoCServicePoC
ServiceIMService
IMService
The uniform infrastructure enables smooth integration of different services from the user perspective
15Service Delivery in IMS –the PoC case study
DRAFTContent
The Services Delivery Challenge
Services Infrastructure
Operators Choice
The PoC case study
16Service Delivery in IMS –the PoC case study
DRAFT
Choice of Business Model #1“Service completely hosted by MNO”
Peer to PeerService accessAlternative Access
IMSIMS
UMTS/GPRS
Ena
blin
gS
ervi
ces
Ena
blin
gS
ervi
ces
HLRHSS MNO
ServicesMNO
Services
InternetServicesInternetServices
MNO
WLO
Telco
ISP/ASP
GWGW
GWGWPSTNxDSL
GWFWGWFW
WLAN
user paysfor serviceand access
GWGW
IntranetServicesIntranetServicesLAN
Enterprise GWFWGWFW
GW GatewayFW Firewall
The MNO is able to expand the value chain including higher value services
End to End service delivery by MNO
Alternative services access possible
17Service Delivery in IMS –the PoC case study
DRAFT
Choice of Business Model #2“MNO provides services with partners”
Peer to PeerService accessAlternative Access
IMSIMS
UMTS/GPRS
Ena
blin
gS
ervi
ces
Ena
blin
gS
ervi
ces
HLRHSS MNO
ServicesMNO
Services
MNO
WLO
Telco
ISP/ASP
GWGWPSTNxDSL
WLAN
user paysfor serviceand access
GWGW
IntranetServicesIntranetServicesLAN
Enterprise GWFWGWFW
GW GatewayFW Firewall
The MNO is able to maintain full business relationship to the user while including 3rd party services in his portfolio
PartnerServicesPartner
ServicesGWGW
GWFWGWFW
GWFWGWFW
Se
rvic
eC
on
tra
ct
RevenueShare
User authentication and charging by MNO
Alternative services access possible
18Service Delivery in IMS –the PoC case study
DRAFT
Choice of Business Model #3“MNO provides access only”
Peer to PeerService accessAlternative Access
IMSIMS
UMTS/GPRS
Ena
blin
gS
ervi
ces
Ena
blin
gS
ervi
ces
HLRHSS MNO
ServicesMNO
Services
MNO
WLO
Telco
ISP/ASP
GWGWPSTNxDSL
WLAN
user paysfor access
GWGW
IntranetServicesIntranetServicesLAN
Enterprise GWFWGWFW
GW GatewayFW Firewall
The MNO provides access only (“Bit Pipe”)
PartnerServicesPartner
ServicesGWGW
GWFWGWFW
IP-basedMultimedia
IP-basedMultimedia
user paysfor service
Access business separated from services business
Operator provides access to the Internet allowing mobile customers to choose from any (competing) services in the web
19Service Delivery in IMS –the PoC case study
DRAFTOperators Decision Points
IMSIMS
Do we want to deploy IP based real-timeand non-real-time
multimedia services?
Do we want to mix service categories (conversational, streaming, messaging)
for multi-modal communication? New MNO business
opportunities
Do we want to control the new services beyond providing the bit-pipe?
MNO’s choice of business
model
Do we want to use standardized components?
Do we want to provide these services on a homogeneous infrastructure?
Best practice
20Service Delivery in IMS –the PoC case study
DRAFTSingle 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)
Application
A.1Application
A.1
Admin1Admin1
BillingBillingIf IfIf
Application
A.2Application
A.2Application
A.3Application
A.3
Infra-structure
Admin2Admin2 Admin3Admin3
Infra-structure
Infra-structure
Expensive !!
Application
A.1Application
A.1
BillingBillingIf
Application
A.2Application
A.2Application
A.3Application
A.3
AdminAdmin
Infra-structure
Lower OPEX and CAPEX
21Service Delivery in IMS –the PoC case study
DRAFTService Evolution
Bandwidth
real-time
lowdelay
besteffort
QoS
VideoConversation
VideoConversation
AudioConversation
AudioConversation
VideoStreaming
VideoStreaming
IMIM
SMSSMS MMSMMS
PTTPTT
IMS nice to have
IMS recommended
IMS mandatory
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!
22Service Delivery in IMS –the PoC case study
DRAFTContent
The Services Delivery Challenge
Services Infrastructure
Operators Choice
The PoC case study
23Service Delivery in IMS –the PoC case study
DRAFTMarket expectations on service delivery
Support of new business models Enable easy service development Support of fast service deployment Enable innovative mobile multimedia services like
Customized infotainment (gaming)
Enhanced voice/video communication over IP (push-to-talk)
Integrated services for- Enterprises (integrated calendar services)- Mobile business workers (mobile intranet)- Consumers (click to call from web pages)
Streaming of voice/video
Support flexible charging and m-payment Support quality of service Provide global roaming
24Service Delivery in IMS –the PoC case study
DRAFTService delivery in 3GPP (IMS)
3GPP addresses some of these market expectations 3GPP specifies the IP Multimedia Subsystem (IMS) that
provides Architecture for the realization of multimedia services
Framework for charging Roaming Security Mechanisms for service provisioning by 3rd parties
– IMS services/functions• Presence
• Messaging
• Group management
• Conferencing
– IMS capabilities• Session management
• User data access
• Event subscription and
notification
• Authentication
25Service Delivery in IMS –the PoC case study
DRAFTService delivery in OMA
OMA aims at addressing all market expectations OMA specifies a service environment that comprises
Mechanisms for service provisioning by 3rd parties
– Service enablers• Location
• Presence and availability
• Messaging
– Common functions (tbd)• Authentication
• Charging
• ...
26Service Delivery in IMS –the PoC case study
DRAFTRelation and overlap of domains
PoC
(ffs)
Charging
Service A Service B Service C
Service Enablers and
Common Functions
IMS Service Control
IMS Session Control
Ses
sio
n
Man
ag
eme
nt
Co
nfe
ren
cin
g
Gro
up
Man
ag
eme
nt
PresenceMessaging
Pre
sen
ce
IMS
Mes
sag
ing
Connectivity
(ffs)
OMA Domain
3GPP/3GPP2Domain
IMS
Ch
arg
ing
Fra
mew
ork
IMS
Ne
two
rk A
rch
itec
ture
Stepped demarcation
Border of domains
These specifications are either not complete or may not necessarily exist in 3GPP2
* *
*
**
Currently the specification work of 3GPP partly overlaps with OMA activities– Degree of overlap varies and depends on particular issues– A straight demarcation line cannot be introduced at present
27Service Delivery in IMS –the PoC case study
DRAFT
Scope of OMA
(OSE)
Scope of 3GPP/3GPP2
(IMS service Provisioning)
IMS Session Control layer(X-CSCF, HSS, ...)
Enabling Services Layer
Application Layer(e.g. PoC, Chat, BuddyList)
S-CSCF
ISC
proprietary
SIP-AS
SIP-AS
OSA
OSA-GW
OSA-AS
Relation to be clarified
Adjust the scope of 3GPP and OMA
The goal – Establish continuity of standardization
process– Prevent fragmentation of standards– Consistent reuse of 3GPP IMS
capabilities and mechanisms by OMA service enablers (e.g. Push-to-Talk over
Cellular, Instant Messaging, Presence)
The benefit– Accelerate the service enablers
definition process by leveraging IMS capabilities in an interoperable way
– Protect heavy investments in standardization efforts and product development of IMS
– Save resources by avoiding duplcation of work
28Service Delivery in IMS –the PoC case study
DRAFTWhat is PoC?
PoC – push to talk over Cellular
What it is:
29Service Delivery in IMS –the PoC case study
DRAFTPoC as an example for work split
PoC client
GLMS
Im
Is If
It
AC
CE
SS
NE
TW
OR
K
PoC
Serv
er
SIP
/ I
P C
ore
(b
ase
d o
n IM
S/M
MD
cap
ab
ilitie
s)
Ik
Bold box identifies PoC functional entities
Presence Server
Ipl
Ips
Ipp
It: Floor Control and media Is: PoC Client to Proxies Session Signaling If: Proxy to PoC Server Session Signaling Im: Group Mgmt to PoC Client Ik:Group Mgmt to PoC Server
IMS, ISC
IMS, Ut
IMS, Gm
30Service Delivery in IMS –the PoC case study
DRAFTRelation of IMS and PoC
PoC client - SIP/IP Core POC Is = IMS Gm
- Session signaling, authentication, registration
SIP/IP Core – PoC Server PoC If = PoC ISC
- Service signaling and charging
PoC Client – Group List Management Server PoC Im = IMS Ut
- Group management
31Service Delivery in IMS –the PoC case study
DRAFT
Collaboration between 3GPP/2 and OMAThe way forward
Compatibility of release schedules Ensure mutual visibility and communication of Work
Programme and Work Items Visibility of each other’s WI progress
Mutual information on a periodic basis of specific WI status and progress
Establishment of coordinators on WG/WI level Avoid additional/unnecessary requirements documents
Exchange information on periodic basis of requirements documents and their current status
Resolving interaction with common third parties Agree on which organisation is the lead contact into
specific third organisations to ensure consistency of inputs Avoiding duplication of work
Need to review current list of WIs to identify any overlap Identify in which organisation each work area is best
performed and identify a single responsible group
DRAFTService Delivery in IMS – the PoC case study
CCSA Workshop on OMABeijing, 20 August 2003
Dirk Weiler <[email protected]>Vice President Standardization and Fora,
Siemens Information and Communication Mobile
Thank You Thank You for Your for Your
Attention!Attention!