Lte Latin America 2011 Ims Assuming An Important Role On Lte V1.0

IMS Assuming an
Important Role
on LTE
Alberto Boaventura
alberto@oi.net.br
0 31 21 8875 4998

Mobile Broadband Industry Consolidation
2500 MM Mobile Internet Accesses
surpass Desktop Internet
Global Internet is still 2000 MM Accesses
growing :
1.8B Users, +13% Y/Y 18.8T 1500 MM
Minutes Spent, +21% Y/Y
1000 MM
But, mobile will be
500 MM
preferable access
in 4 Years 0 MM
2007E 2008E 2009E 2010E 2011E 2012E 2013E 2014E 2015E

Mobile Desktop Source: Morgan Stanley 2010

Revenue forecast per
application type
2008-2015

Source: Ericsson 2010

The MBB is rapidly consolidating, and in couple years will be the
preferable Internet access. Despite of that, voice services still
represents the most important part of revenue, but it is being replaced
by the new communication types …
Diretoria de Engenharia e Operações – Planejamento Técnico

Mainframe-> Mini-> Desktop -> Smartphones/Tablets

5 convergence trends: MBB + Social
Networking + Video + VoIP + usability in
differentiated devices

Mobile
Internet

Internet

Desktop

Mini 10 B+
Mainframe

1 B+

100 MM+
1 MM+ 10 MM+

1960 1970 1980 1990 2020+
Source: Morgan Stanley 2010

The expressive Mobile Internet growth projection is justified by
integration of functionalities (for personal use) in a single device, and
becoming in next years the preferential Internet device against desktops.

Market is eager for more thoughput
Rel 9 HSPA+ Rel 10 LTE
TV 3D DL: 84 Mbps DL:> 1 Gbps
HDTV UL: 23 Mbps BW: 100 MHz
BW: 10 MHz LTE Advanced
Rubust
On-Demand Augmented Rel 8 HSPA+ Rel 8 LTE
Gaming
Reality
DL: 42 Mbps DL: 326 Mbps
UL: 11,5 Mbps UL: 86 Mbps
Video P2P BW: 5 MHz 20 MHz
Conference Virtualization
Visual Mbps+
Networking
Rel 7 HSPA+
Mobile TV
Internet DL: 28 Mbps
Collaboration M2M UL: 11,5 Mbps
BW: 5 MHz

Music Games Mbps
Social Rel 6 HSPA
MMS
Networks
DL: 14 Mbps
Email Mobile Web UL: 11,5 Mbps
BW: 5 MHz

EDGE
Telemetry LBS/GPS kbps
DL:237 kbps
UL:59 kbps
EMS
IM GPRS
SMS DL:80 kbps
UL:20 kbps

The operators are still intensively investing in network infrastructure
and new band licenses in order to follow continuous market anxiety for
more throughput. de Engenharia e Operações – Planejamento Técnico
Diretoria

Web Based Services
Web Services:
• Lower Costs
• Minimum Risk
• Advertisement and Lower
Tariff Business Model
• Most important Telco
threat

Opeator Network:
• OPEX
Operator Transport Network • CAPEX
• License Obligations
SGSN/MME

MSAN/AGW
ONT

Operator Customers:
ONU modem
• Contract Obligations
• License Obligations
• Customer Prospect Cost
HSPA/LTE Wi-Fi FTTx xDSL
• Price Competition

But higher throughput enables services in the new web industry (over
the top), impacting severely the traditional operator business models.

Traffic and Revenue decoupling
Rapid and consistent mobile broadband consolidation, air interface
technology advances, machine type communication and new smart
devices will bring a tsunami of IP data traffic. In the same time, high
competition with lack technology barrier force a rapid service lifecycle
and new services becomes mature quickly, with low profitability.

Traffic

Revenue

Voice Dominant Data Dominant

New challenge: how to be profitable in data era?


IP Multimedia Subsystem
Control
New Service Creation
User Data
Self Provisioning
Service Portal
Transport
Service Only!!!
Billing IMS
QoS

Session Control

Service Access Control Transpor t Network
Transpor t Network

Privacy and Security

Multimedia
Access
Access
Network
Network Internet Access ONU
ONU

Transport Network

HSPA/LTE FTTx
HSPA/LTE FTTx Access Network

IMS is the most impressive and complete framework that allows
operator to offer differentiated services, controlled by network,
guarantying customer service experience and investment value
protection Diretoria de Engenharia e Operações – Planejamento Técnico

What is IMS role in LTE?
GSM/GPRS/EDGE
Call Session Control, or core of IMS,
MSS
GMSS
Um BTS (SR-VCC) Policy & Charging Control, introduced at
responsible for establishing, billing, event
BSC (MGCF)
coordination, media and resources beginning of IMS architecture, responsible
PLMN/
controlling and service development in to manage properly the network resources
PSTN/SS7
order to fulfill the serviceAand application
A-Bis based on service level requirements.
requirements. C/D C/D PCC gives to user applications the
Mc
IuCS
In LTE, the IMS will replace the existing required and fair network resources based
MGW
switch offices in CS Domain.
Gs/Gd/
HSS on service business requirements.
Sv/SGs
UMTS/HSPA/HSPA+
Gb GGSN
Uu Gr Gc
(P-GTW)

Gn Internet
Iub IuPS GTP-U Gi
NodeB RNC SGSN
(MME/SGW)
Mg

Cx Gm Gx

LTE/EPS
Mw Rx
Uu
There is no CS domain inPCRF The CS
S-CSCF P-CSCF LTE.
services, such as TDM calls and SMS, will
Mw
Gy
S1 be replaced (or migrated to) by services
ISC
ENodeB under IP network environment.
Ro

AS I-CSCF OCS IMS

IMS will not only enable the multimedia services, but this is one of the most
powerful tool for capturing opportunities and any service lifecycle stage: Rating
and charging services for developing compelling and competitive revenue
models. Diretoria de Engenharia e Operações – Planejamento Técnico

Is LTE proper to transport voice services?
200kHz
GSM/GPRS/EDGE 0 1 2 3 4 5 6 7
Um BTS MSS/MGW
BSC
PLMN/ Logical and physical channels are
PSTN/SS7 structured in 8 TS, named TRX. The TRX
A-Bis A capacity is 2,5 Erl @ 1% GoS
C
Services based on deterministic TDM
network.
HLR The spectral efficiency is 9 users per MHz

UMTS/HSPA/HSPA+
Uu NodeB
MSS/MGW
RNC 3,84MHz
PLMN/ Each 5MHz (3,84 MHz) carrier is able to
PSTN/SS7 transport 125 voice channel. But the RF
Iub Iu-CS
C limitation this number is around 60
channels, that corresponds 47Erl @ 1%
GoS
HLR
The spectral efficiency is 20 users per MHz

180 kHz
LTE/EPS
Uu Freq.
MME/S/PGW TTI/2
PLMN/
IMS
T.
PSTN/SS7
S1 S1 Sgi/ There is no dedicated resources (channels)
ENodeB Gm Cx/Sp for voice transport in LTE. The voice
services are based on VoIP, and the capacity
S6a
is function of statistical multiplexing
HSS premises.
The spectral efficiency is 80 user per MHz

Path to Support Voice and Legacy Services

Voice over
CSFB VoLTE
CS Domain

VoLGA


What is Circuit Switch Fall Back (CSFB)?
LTE
Uu

PLMN/
SGs
PSTN/SS7
S1 SGs
ENodeB MME/SGW/PGW MSC
C

HLR/HSS/AAA

GSM/UMTS A/Iu-CS
Um/Uu

Abis/Iub
BTS/NodeB BSC/RNC

► Defined in 3GPP TS 23.272, represents a short term solution for voice and legacy services
supporting in LTE network.
► Consists to redirect from LTE network any service based on CS domain (voice or SMS) to
2G/3G network
► Requires SGs interface activation for terminating services.


What is VoLTE?
SCC AS
LTE TAS
Uu

PLMN/
IMS PSTN/SS7
S1 Gm/Rx/SGi PSTN
ENodeB MME/SGW/PGW
Cx/Sp
I2/I3

HLR/HSS
Sv/SGs AAA/SPR

GSM/UMTS
Um/Uu C PSTN

Abis/Iub A/Iu-CS
BTS/NodeB BSC/RNC MSC
SR-VCC

► VoLTE is a GSMA and 3GPP conjunction initiative, supported in 3GPP IMS recommendation
framework, which architecture is defined IR.92 based on 3GPP TS 23.002 and TS 23.228.
► 3GPP vision for voice service support in LTE
► Needs Applications Servers for Service Centralization and Continuity (SCC), Telephony
► The service continuity and handover are guaranteed by SR-VCC (Single Radio Voice Call
Continuity), defined in 3GPP TS 23.216, using a special interface between MME and MSS, Sv,
for call achoring.

What is VoLGA (Voice over LTE via Generic Access)?

LTE
Uu

PLMN/
PSTN/SS7
S1 SGi/Sv A/Iu-CS
ENodeB MME/SGW/PGW VANC MSC
D’ C

HLR/HSS/AAA

GSM/UMTS A/Iu-CS
Um/Uu

Abis/Iub
BTS/NodeB BSC/RNC

► Based on Generic Access Network interface defined in 3GPP TS 43.318 and 23.879 for CS
services over PS domain.
► Not totally standardized, and there is no formal references in 3GPP, however there is specific
forum, with set of operators and suppliers participation: VoLGA Forum.
► Needs a specific network element: VANC (VoLGA Access Network Controller).
► Supports handover, but it needs huge integration job

Strengths & Weaknesses

CSFB VoLTE VoLGA
No IMS investment Voice and data services can be No IMS investment
delivered in the same network
3GPP standard, and widely
Strengths

supported in several vendors -> No need CS domain.
no roaming problems

Data sessions can be Requires IMS introduction or Not standardized by 3GPP
interromped during the voice expansion
calls. Only a single operator announced
In the first moment will not be support
ubiquitous and there will be
Weaknesses

Long call establishment time (at roaming problems. Needs terminal support.
least 3 seconds more);
Solves the problem for CS domain
Não utiliza os benefícios da alta (legacy services)
eficiência espectral do LTE;


Concerns for VoLTE

► Interconnection (ITX)
– It is imperative to standardize a technical model to be followed by
operators for network integration and interconnection:
• User and control plan protocols
• Visited and home network models
• QoS
• Service transparency
– GSMA is working in a set of recommendations that are being
synthesized in IR.34 and IR.88.
– And in Brasil? And in Latin America?

► Roaming
– It is important to create business models in order to be consistent with
financial and revenue sharing premises;
– GSMA created an interconnection model called IPX (IP eXchange), GRX
successor, for IP, VoIP and IMS interconnection services;
– And in Brasil? And in Latin America?


But IMS is not VoLTE only

3GPP ICS (IMS Centralized Services)

3GPP MMTEL (Multimedia Telephony Services)

GSMA RCS (Rich Communication Suite)


IMS Centralized Services
SCC AS (Service Centralization & Continuity) AS
► Specified in 3GPP TS 23.292, provides all service ICS User Agent
redefinitions, including over CS domain, for CS Access Adaptation
developing based on IMS.
Service control funcionalities (I1): Registration, Call
Control,Service Continuity
► All network services are provided via IMS
– Existing basic call and supplementary services
– New multi-media services (MMTel, Video etc.)
SCC AS
► Allows legacy UE access ISC
– Best effort service delivery – up to the UE SGSN/
capability GGSN
Gm/I1

– Access adaptation – allows non-IMS UE to gain Sv
access to IMS network CSCF
I2
ISC
► Fixed and Mobile Convergence
MSS/MGW
I3
– Agnostic to access network
– Guaranties fixed and mobile unified services TAS
Terminais (UE)
► Roaming support
ICS (Interface I1 & Gm support)
– Industry standard
Non ICS
► Service continuity
– Can be supported in different network and
MSC Server
operaors
Must support I2 and I3 interface functioonalities
► Needed for SR-VCC

IMS Centralized Services
Delivered Services Access Network Transport & IMS Application &
IP Backbone Services
Metro Ethernet

VoIP
Complete MMTEL Metro
PCRF AS
Boadband FTTx Ethernet
QoS
HLR/
IP Enriched services OLT HSS/AAA
IPTV over IMS
Real Time Services ONT x-CSCF
PTSN Simulation
Par de Fios
TAS

MSAN BRAS
MGCF
Rede 2G MGW
Voice over CS
Partial MMTEL SCC
Low data rate
IP Services BSC
BTS
BGCF
Rede 3G
Voice over CS (UMTS only)
MMTEL
VoIP
Complete MMTEL RNC
NodeB
Boadband Core
QoS MRFC
IP Enriched services
Mobile MRFP
LTE/EPC
IPTV over IMS Network
Real Time Services
PTSN Simulation IBCF IM SSF
IBGF
ENodeB MME/PGW


MMTEL (Multimedia Telephony Services)

► MMTel is a global standard, specified in 3GPPTS 22.173
(Stage 1) and 24.173 (Stage 3) for real time multimedia
communications.

► Establishes IMS service requirements for legacy CS domain
services and ETSI TISPAN.

► Provides, beyond CS Domain simulated basic and
supplementary services, the following Internet services:
– Chat: text message delivery
– Speech conversation
– Video communications
– File (pictures, video clips, data files etc.) transfer
– Point to point and point to multi-point
communications
– Dynamic session add-on and removal
– Presence-enabled address book
– Terminal capability adaptation
– Location services
► As standard, allows roaming between operators.


RCS (Rich Communication Suite)
► Project created by GSMA that represents a join industry effortin order to accelerate and fatcilitate
the service and application adoption, allowing interoperability, convergence, enriched multimedia
communication, advanced presence services based on IMS;

Enriched Call Enhanced
Voice calls with Messaging
multimedia content Conversational
sharing message experience

Enhanced
Phonebook
Agenda
Advanced presence
functionalities


The overall IMS framework is still evolving

2008- 2008 2009 2010 2011
EDGE E-EDGE

DL:237 kbps DL:1,89 Mbps
UL:59 kbps UL: 947 kbps
Access Network

Rel 7 HSPA+ Rel 8 HSPA+ Rel 9 HSPA+ Rel 10 HSPA+
DL: 28 Mbps DL: 42 Mbps DL: 84 Mbps DL: 168 Mbps
UL: 11,5 Mbps UL: 11,5 Mbps UL: 23 Mbps UL: 23 Mbps
BW: 5 MHz BW: 5 MHz BW: 10 MHz BW: 20/10 MHz

Rel 8 LTE Rel 9 LTE Rel 10 LTE
DL: 326 Mbps
Self Organized DL:> 1 Gbps
UL: 86 Mbps
Network BW: 100 MHz
20 MHz
LTE Advanced
Core Network and IMS

Rel 5 IMS EPC VoLGA OneVoice IMS
Evolved Pack First
Firs specification Operator
Core & Common specification in
in 2002 iniitiative
IMS - Release 8 2009

Rel 7 MMTEL CS Fall Back ICS & SRVCC VoLTE GSMA
First GSMA initiative
First First
specification in announced in
specification in specification SR-
2002 february 2010.
Rel.8 VCC Rel.8


Conclusions
► Although MBB is consolidating and in will be the preferable Internet access, voice services
still represents the most important part of revenue.

► LTE provides high throughput with low latency that is excellent for data services, but it
represents 10 times more spectrum efficiency than GSM for voice transport.

► The operators are still intensively investing in network infrastructure and new band licenses
in order to follow continuous market anxiety for more throughput. That enables other
competitors beyond operator control from new Web Service industry.

► IMS is the most impressive and complete framework that allows operator to offer
differentiated services, controlled by network, guarantying customer service experience and
investment value protection.

► Besides, IMS will enable the VoIP over LTE technology, taking advantage of high spectrum
efficiency, guarantying the user level experience and operator business premises.

► IMS does not only enable the multimedia services (such as VoLTE, MMTEL and ICS), but it is
one of the most powerful tool for capturing opportunities and any service lifecycle stage
(PCC): Rating and charging services for developing compelling and competitive revenue
models.

► Interconnection and roaming technical and business model are pragmatic open issues that
must be solved in next years.


Obrigado!
Gracias!
Thanks!
Alberto Boaventura
alberto@oi.net.br
0 31 21 8875 4998

Lte Latin America 2011 Ims Assuming An Important Role On Lte V1.0

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