EMC/QX/R-04:063 Uen Rev A CDG IR Team 2004-12-131 IP MultiMedia Subsystem (IMS) New Service Possibilities Alain Bouvier [email protected] CDG

EMC/QX/R-04:063 Uen Rev A CDG IR Team2004-12-13 1

IP MultiMedia Subsystem (IMS) New Service Possibilities

Alain Bouvier

[email protected]

CDG International Roaming Team Meeting

Kauai, December 13-14, 2004


Covering…

IMS Overview; IMS Interworking & Roaming; Ericsson IMS offering.


Main IMS Standardization groups

3GPP TSG SA WG2 (Architecture); 3GPP TSG SA WG1 (Services); 3GPP2 TSG-X WG 3.2 - MultiMedia Domain (MMD); 3GPP2 TSG-X WG 3.4 - MultiMedia Services (MMS).


Third Party Statement On IMS

“In the next 18 months, carriers will implement IMS platforms largely for specific

applications, creating beachheads for its market penetration. Beyond that, IMS will

become a standard service environment for wireless operators and for creating

converged mobile and fixed services.” (Source: Yankee group March 22, 2004)


IMS Momentum

The OMA (Open Mobile Alliance) “IMSinOMA” Requirements Document (RD) provides a single general use case which rationalizes IMS as the only globally standardized SIP-based architecture (to date) that addresses the needs of mobile operators in terms of session management, security, mobility, QoS and charging.“OMA service enablers shall make use of capabilities provided by the 3GPP and 3GPP2 IP Multimedia Subsystem (IMS) when IMS is used”;

The ETSI TISPAN Group (Telecoms & Internet converged Services & Protocols for Advanced Networks) NGN (Next Generation fixed Network) will use the 3GPP IMS technology.


IMS Overview IMS is an framework for

enabling advanced IP services & applications on top of packet bearer;

IMS supports new IP based MM services and interoperability with traditional telephone services;

IMS is “access aware” & “access independent”: WCDMA, GSM, CDMA2000, wireline, WLAN, etc.

SupportSystem

ProvisioningProvisioning

ManagementManagement

ChargingCharging

Number MappingNumber Mapping

Common System

I-CSCFI-CSCFP-CSCFP-CSCF

HSSHSS

MRFPMRFPMRFPMRFP

MRFCMRFC

S-CSCFS-CSCF

IMS clients

Application Layer

ASAS

Applications; Service Enablers:

Group Mgmt;

Conferencing;

Messaging;Presence;

Service Execution Environment

Etc.

Applications; Service Enablers:

Group Mgmt;

Conferencing;

Messaging;Presence;

Service Execution Environment

Etc.ASAS

Interworking

SBGSBG

MGCFSGW

MGCFSGW

MMGWMMGW

IP Network

CS Network

AS : Application Server - Application logicCSCF : Call Session Control Function - Session control and signalingHSS : Home Subscriber Server - Maintains the home subscriber profileMRF : Media Resource Function - Media stream manipulationSBG: Session Border GatewayMGCF: Media Gateway Control FunctionMMGW: MultiMedia GateWaySGW: Signaling Gateway


IMS Overview (cont…)

Registration

Service invocation

Authentication

Charging

Media distribution

Policy handling

Location

Presence

Group management

Messaging

Conferencing

Service Enablers and Core Elements dynamically work together to create new Multimedia services;

Elements are reused in different combinations.

Service Enablers Service Core Elements


IMS Main Benefits

Naturally enables convergence of internet and telecommunication services;

IMS introduces common functions and enablers that can be reused (i.e. horizontal functions such as charging, provisioning and presence can be re-used for additional services launched);

IMS is an architecture that supports many operator’s requirements of the Data Services business model (e.g. provides Network Control when required, i.e. provide control or push it to the client if it makes more sense).


Next Generation Network (NGN) Requirements

• …Interworking & World Wide Roaming…; (Source: CDG FGWN

Group)

“IMS Interworking means that two different IMS networks are connected through Inter-PLMN IP network to enable SIP

control and transport of user plane”

“IMS Roaming means that VPLMN packet network resources are used in order to connect to the IMS core network, which

resides in HPLMN (short term case) or VPLMN”

(Source: GSMA IR.65 – “IMS Roaming & Interworking Guidelines”)


Other ?Other ?

CRX/GRX?

CRX/GRX?

Internet?

Internet?

IMS InterworkingGRX is preferred for:MMS/IMS Interworking

Access Network

Access Network

S-CSCF

I-CSCF P-CSCF

GGSN

SGSN

UE

ServerServer

GPRS/UMTS

Access Network

Access Network

S-CSCF

P-CSCF I-CSCF

HA

ServerServer

UE

PDSN

CDMA2000

PDSN : Packet Data Serving NodeHA : Home AgentSGSN : Serving GPRS Support NodeGGSN : Gateway GPRS Support NodeGRX : GPRS Roaming ExchangeCRX : CDMA Roaming Exchange


HomeNetwork

IMS Roaming – PCSCF in HPLMN

CRXCRX

IMS Home Network

IMS Home Network

S-CSCF

HSS

HA

VisitedNetwork

IMS Visited

Network

IMS Visited

Network

PDSN

UE

P-CSCF

IMS roamers connect to the HPLMN through Mobile IP (MIP) giving full service control to the HPLMN;

The visited network does not have to have an IMS domain.


IMS Roaming – PCSCF in VPLMN

HomeNetwork

CRXCRX

IMS Home Network

IMS Home Network

S-CSCF

HSS

VisitedNetwork

IMS Visited

Network

IMS Visited

NetworkUE

I-CSCF

IMS control shared between home and visited network;

Offers benefits like improved QoS and security. The VPLMN is not a bit pipe.

P-CSCFPDSN


Ericsson IMSOfferings

CommercialOfferings

TrialOfferings

AvailableNow

Services offering for IPMMAdvisory servicesManaged servicesIntegration services

Engine Multimedia Wireline VoIP, IPCentrex, other MM services

EMM

Ericsson Instant TalkCompliant with the only available multi-vendor specification (PoC)

EIT IP Multimedia System IMS infrastructure including SIP reachability, presence, GLMS, ISC, etc.

IPMM

Service Development StudioDevelopment tool for new applications

SDS

weShareA family of Combinational Services combining the CS and PS domain

weShare


Ericsson Instant Talk (EIT)

IP Multi MediaIPMM

CSCF - CallSessionControl

Function

MRF - MediaResourceFunction

HSS - HomeSubscriber

Server

Instant Talk Application

Server

Ericsson’s implementation of Push-to-Talk over Cellular (PoC);

Based on IPMM (i.e. Ericsson’s implementation of IMS/MMD);

Contact list integrated with phones;

Media

SignalingEIT

Client

User Features Example: Open/closed chat user groups Add users to an on-going session Group management from handset Pre-defined and add-hoc groups Subscribe to each others presence Do not Disturb (DnD) Floor control


weShare – an Evolution Path to Mobile MM

Perceived “real-time”-ness

WS-ImageWS-Motion

Mode 2“Communicate & Share”

1. Call.2. Create/find content.3. Send it while talking. 4. Talk about it.

Directions on a mapShared BrowsingWhiteboard

Mode 3“Communicate, Share &

Interact”

1. Call.2. Create/find content.3. Add it while talking.4. Talk about it, interact with it, point to it, manipulate it…

1. Create/find content.2. Send it.3. Call and ask to retrieve.4. Wait.5. Talk about it.

MMSemail

Mode 1“Verbal protocol”


Conclusion

IMS is getting momentum as the architecture of choice for the introduction of Mobile & Fix Multimedia Services;

Regulatory bodies in Europe are encouraging the industry to address the Interworking and Roaming issues in order to avoid the fragmentation of IMS services;

The GSMA organization has introduced the “IMS Roaming & Interworking Guidelines” document and recommends using GRX networks for Interworking/Roaming;

Combinational Services enables the combination of real-time CS voice with near-real-time Packet Data services to enrich the end-user’s experience.


QUESTIONS ?

? ?

TAKING YOU FORWARD

Documents

EMC/QX/R-04:063 Uen Rev A CDG IR Team 2004-12-131 IP MultiMedia Subsystem (IMS) New Service Possibilities Alain Bouvier [email protected] CDG