key drivers for lte success: services evolution · sms and messaging over lte lte is packet only...

THE Mobile Broadband Standard

© 3GPP 2011 3GPP Seminar, LTE Asia , 6 September 2011

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Key drivers for LTE success: Services Evolution

Balazs Bertenyi

Chairman of 3GPP TSG SA



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Outline

Overall 3GPP work areas IMS – the service platform for operators • Multimedia Telephony (MMTel)

Policy Control evolution (PCC) Access discovery and selection (ANDSF) Machine Type Communications (MTC) Device-to-device communication (D2D) Regulatory features (disaster warning, emergency calls, priority service) • Public Warning System (PWS) • Priority Services



Overall 3GPP work areas

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IMS and its evolution (1/2)

Basic IP Multimedia standards have been available since 2003

• Gradual addition of functions has created a carrier grade service

platform

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2011 2010 2009 2008 2007 2006 2005 2004 2003 2002

R5 R6 R7 R8 R9 R11

IMS Created Multimedia

Telephony

Services

Created

Optimizations

& Quality

Improvements

Common

IMS

(cover:

Fixed,

Cable)

Basic Voice

Call Cont.

IMS

Central

Services

Unauth.

Emergency

Calls

Various

Enhancements

2012 2013

R10

Inter UE

transfer

Various

Other

Enhancements



IMS and its evolution (2/2)

Work still ongoing on operational-related aspects • Jointly with the GSM Association on aspects of interconnect, roaming

and charging

• Local Breakout is utilized for connecting IMS media

• Optimized media path is important to reduce cost

• Legacy Charging Accounting and Interconnect principles should be re-used

Location requirements being addressed • Authorities in many countries require network-authenticated location

information stored for certain sessions (e.g. for court cases)

• Standards are being developped to address this

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SMS and Messaging over LTE

LTE is packet only and hence does not natively support legacy SMS

IMS based messaging may not be available at initial LTE deployments

Standards were developed to deliver legacy SMS over LTE

• A device that is attached both to LTE and 2G/3G can send and receive

legacy SMS over the legacy CS core network

• Enhancements to the necessary interfaces were defined to pass SMS between legacy CS core and EPC/LTE

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Policy Control (PCC)

The PCC framework allows QoS and Charging control of IP traffic

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Gy

Gz

Subscription Profile

Repository (SPR)

Rx

AF Sp

Gx

Offline

Charging

System

(OFCS) Gateway

PCEF

Policy and Charging Rules Function (PCRF)

Online Charging System (OCS)

Service Data F low

Based

Credit Control

Gxx

BBERF

Internet /

Operator IP

Services



PCC evolution

The PCC framework has been further enhanced to give operators an even wider range of control tools

Support for sponsored data connectivity has been added

Service awareness, deeper lookup of packets is also supported

Handling of privacy policies has been standardized

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Access Discovery and Selection (ANDSF)

EPC is a multi-access IP core system supporting both native 3GPP cellular

radio technologies and other IP access systems (802.x, etc…)

Legacy selection mechanisms have been available to choose a 3GPP cellular radio and PLMN

Additional standards were developed to take into account non-3GPP access technologies

• Access technology policies are uploaded to the device using Device Management procedures

Further work ongoing to fine-tune the granularity of the policies

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Machine Type Communications (MTC)

M2M is recognized as a key segment in future packet networks

Initial 3GPP efforts have focused on the ability to differentiate machine-type devices • This allows the operator to selectively handle such devices in overload

situations

• Low priority indicator has been added to the relevant UE-network procedures

• Overload and Congestion control is done on both core network and radio access network based on this indicator

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MTC – basic architecture

Work in progress…

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3GPP Boundary

MTC Server

GGSN / PGW / PDG

Proxy (TBD)

SGSN / MME

HLR / HSS

API MTCi

SMS-SC IP-SM-GW

Legacy SMS

IP SMS

MTCsp

Indirect model – service provider controlled

Indirect model – operator controlled Gr/S6a

Um / Uu /

LTE-Uu

RAN M2M

Application

Internal interfaces

(TBD)

Control plane User plane

Direct model Gi/SGi

M2M Application UE

MTC User

MTCsms



Evolution of MTC

Further functionality being added to 3GPP standards in the following areas • Reachability Aspects, MTC Feature control, Device Triggering

• Addressing, Identifiers - especially removal of MSISDN dependencies in the architecture

• Signaling Optimizations

• Small Data Transmissions

• MTC Monitoring

• ….

MTC is a substantial technical area, full completion will span across multiple future Releases

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Device-to-device Communication (D2D)

Proximity-based applications and services represent a recent and enormous social-technological trend • These applications and these services are based on the awareness that

two devices or two users are close to each other

• Awareness of proximity carries value, and generates demand for an exchange of traffic between them

Direct D2D communication is also essential for public safety services • e.g. in case of lack of network infrastructure in disaster situations)

3GPP has initated work on enhancing the LTE-EPC platform to support these capabilities

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Regulatory features – disaster response

Recent events have brought the different disaster response functions of the 3G/4G networks to the forefront

• Public Warning System (PWS) provides a secure framework for delivering Warning Messages to the devices

• The Japanese version of this system saved thousands of lives in the recent earthquake/tsunami disaster

• Priority Services • Mechanisms have been standardized to allow priority access to the

network services (voice calls, Internet, multimedia calls, etc…) for e.g. government officials in the event of a mass disaster

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Thank You

www.3gpp.org

More Information about 3GPP:

[email protected]

Balazs Bertenyi

3GPP TSG SA chairman

+36 20 9849152

[email protected]

key drivers for lte success: services evolution · sms and messaging over lte lte is packet only...

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