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3GPP and Fixed Mobile Convergence

TSG-SA presentation

Stephen Hayes, SA chairman

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Topics to Discuss

• Brief Overview of TSG-SA• Role of 3GPP in Fixed Mobile

Convergence• UMA and Fixed Mobile Convergence• IMS and Fixed Mobile Convergence• Future Work• Conclusions

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3GPP SA• SA = System Aspects• Technical Responsibilities

– Requirements Establishment– Architecture Definition– System Devices (Security, Codecs, O&M)

• Organizational Responsibilities– Project coordination– Release scheduling and planning– Working methods

• Working Groups– SA1 – Services– SA2 – Architecture– SA3 – Security– SA4 – Codecs– SA5 – O&M (including Charging)

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Two Paths to Fixed Mobile Convergence

• UMA (Unlicensed Mobile Access)• IMS (IP Multimedia Subsystem)

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3GPP Taking the Lead in FMC• 3GPP specified IMS as part of Rel 5 with improvements in

Rel 6• 3GPP specified UMA as part of Rel 6• 3GPP added support for I-WLAN in Rel 6• 3GPP is enhancing IMS to support fixed broadband in Rel 7• 3GPP adding Voice Call Continuity in Rel 7• Many IMS based optimizations in Rel 7• IMS Based Multimedia services in Rel 7

1999 2000 2001 2002 2003 2004 2005 2006

Rel 99 Rel 4 Rel 5 Rel 6 Rel 7?

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UMA (Unlicensed Mobile Access)

• Standardized in 3GPP GERAN• Called GAN in 3GPP• Originally developed as a way to extend

coverage/reduce cellular congestion• Extends GSM call control to

WLAN/Bluetooth accesses• Handset uses GSM/GPRS call control• PLMN services provided• Transparent to mobile core network

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UMA (GAN) Concept

UMA enabled dual mode handset

Cellular Access Network

Generic Access Network

PrivateNetwork

BSC

IP AccessNetwork

GANC

MobileCore

Network

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Uptake of UMA for FMC

• UMA used in many early fixed mobile convergence deployments

• UMA incorporated into FMCA PRDs• UMA specified as part of Packetcable 1.5

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IMS

• SIP/SDP based session control• Protocols are access independent• Originally developed as a way to provide

multimedia services in 3GPP• Greater integration with IP network• Intended for support of HPLM based

multimedia applications• Basis of most NGN work

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IMS is Access Independent (in Theory)

3GPPDefinedRadioAccessesFor Packet

FixedAccesses

Non-3GPPDefinedRadioAccesses

GPRS

WCDMA

HSPA

HSPA+

LTE

802.11

802.x

3GPP2MDN

DSL

Cable

IMS

EDGE

TD-SCDMA

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Organizations using IMS

Mobile Mobile

IPIP

ResidentialResidential

Wireline Access to IMS

PoCPoC MessagingMessagingGLMSGLMS MultimediaMultimediaTelephonyTelephony

Cellular Access to IMS

PresencePresenceCSICSI

WLAN Access to IMS

VCCVCC MultimediaMultimediaTelephonyTelephony

MultimediaMultimediaTelephonyTelephony

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3GPP coordination of IMS

• 3GPP Maintains Control of IMS Core Specs• Goal is to have a single IMS• Other organizations submit requirements for

additions to IMS Core• 3GPP works closely with IETF on SIP usage• Overlapping membership/common delegates• Workshops held as needed

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This requires enhancing IMS beyond just the needs of mobile

• Example additions done for TISPAN– NAT Traversal– Extensions for ISUP compatibility– Alternative authentication methods– Border Control Functionality– Terminology Changes

• However some additions also needed by mobile operators– Regulatory compliance

• Emergency Call, Legal Intercept

– Supplementary Service analogs

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Work also going on to aid CS->IMS Transition• CSI (Combinational Services)

– Complement CS services with IMS services

• VCC (Voice Call Continuity)– Voice handovers between IMS and CS bearers

• Multimedia Service Definition– Robust interoperable multimedia telephony

• Improving IMS quality– Faster session setup, improved performance,

better voice quality

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3GPP R7 WIDs related to IMS

Generic VoIP Improvements• IMS Emergency Calls (EMC1) – SA1/SA2/CT1• Lawful Intercept for VoIP (LI-7A) – SA3 LI• System Enhancements for Fixed Broadband Access to IMS (FBI, ISE) – SA2/SA3/SA5/CT1,CT3• Evolution of Policy Control and Charging (PCC) – SA2,SA5, CT3• IMS Trace & E2E IMS Trace (OAM7-Trace) – SA5,CT1• O&M Enhancements to support IMS & IP bearers – SA5• IMS Security Extensions – SA3• Diameter of the PDG Wi Interface (DIAMWi)– CT3• Support of SMS & MMS over generic 3GPP IP Access (SMSIP) – SA2• Identification of Communication Services in IMS (servID) – SA2,CT1• Optimizations for Multimedia Telephony over IMS – SA4• IMS Multimedia Telephony; media handling and interaction – SA4• Characterization of Adaptive Jitter Management Performance for VoIP Services (OMTIMS) – SA4• End-to-End Multimedia Services Performance Metrics (E2EMSPM) – SA4• Multimedia Interworking between IMS & CS Networks – CT3• Study on IMS Enhancements and Optimisations for Real Time Communication – SA2• Multimedia Priority Service – SA1

RAN Improvements• Enhancement of Radio Perf for VoIMS

(voIMS) – SA2• Continuous Connectivity – RAN1• Delay Optimization for CS & PS

(RANimp) – RAN2

Multimedia Telephony (MITe) Voice Call Continuity (VCC)

GERAN Improvements• Support of Conversational

Services in A/Gb mode via the PS Domain (SCSAGB) – GERAN1, GERAN2

• Future GERAN Evolution (FGE) - GERANx

I-WLAN Improvements • LCS for 3GPP Interworking

WLAN (LCS3-IWLAN) – SA2,SA3

• Enhancement to support QoS provisioning over 3GPP/WLAN Interworking (WLAN-SC) – SA2

*Study Items Marked in Red

Combinational Services (CSI)

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Uptake of IMS for FMC

• Adopted by many organizations– 3GPP2 (MDN)– TISPAN NGN Rel 1 (and subsequent releases)– ATIS NGN Focus Group– ITU-T SG19 (FMC)– Cablelabs (Packetcable 2.0)

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The Challenge of IMS

• 3GPP is chartered to develop systems for mobile operators

• 3GPP membership is primarily mobile operators and vendors

• Maintaining a “common IMS” extends slightly outside of the 3GPP charter

• Reconciling requirements from different industry segments (which sometimes compete) is never easy.

• The benefits of a “common IMS” make it worth the headaches.

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3GPP Work after Rel-7

• 3GPP has long term studies ongoing– All IP Network (AIPN)– Evolved radio accesses (LTE)– System Architecture Evolution (SAE)

• This work will leverage and are expected to be optimized for IMS

• New organizations may adopt IMS• It is expected 3GPP will continue to get

requirements in to enhance IMS

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Conclusions

• 3GPP is currently taking the lead in FMC standardization

• Widespread industry acceptance of UMA• Widespread industry acceptance of IMS• IMS is the path for NGN, but constant

vigilance is required to ensure there is only one IMS.