lte latin america 2011 ims assuming an important role on lte v1.0
DESCRIPTION
Presented in Informa LTE LATAM Forum 2011, it intends to provide an overview about voice service support in LTE and what is the IMS role in this new enviroment, passing through the alternative solutions for voice support in LTE.TRANSCRIPT
Diretoria de Engenharia e Operações – Planejamento Técnico
Mobile Broadband Industry Consolidation
Global Internet is still growing :
1.8B Users, +13% Y/Y 18.8T Minutes Spent, +21% Y/Y
But, mobile will be preferable access
in 4 Years
Source: Morgan Stanley 2010
0 MM
500 MM
1000 MM
1500 MM
2000 MM
2500 MM
2007E 2008E 2009E 2010E 2011E 2012E 2013E 2014E 2015E
Mobile Desktop
Mobile Internet Accesses
surpass Desktop Internet
Accesses
Source: Ericsson 2010
Revenue forecast per application type
2008-2015
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
1960 1970 1980 1990 2020+
Mainframe Mini
Desktop
Internet
Mobile Internet
1 MM+ 10 MM+
100 MM+
1 B+
10 B+
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.
Diretoria de Engenharia e Operações – Planejamento Técnico
Market is eager for more thoughput
TV 3D
Rubust Gaming
P2P
HDTV
On-Demand
Virtualization Video
Conference Visual
Networking
Augmented Reality
Collaboration
Mobile TV Internet
Music
MMS
M2M
Telemetry
Mobile Web
Games
Social Networks
LBS/GPS
SMS
IM EMS
kbps
Mbps
Mbps+
The operators are still intensively investing in network infrastructure
and new band licenses in order to follow continuous market anxiety for
more throughput.
DL:237 kbps UL:59 kbps
EDGE
DL: 326 Mbps
UL: 86 Mbps
20 MHz
Rel 8 LTE
DL: 28 Mbps UL: 11,5 Mbps BW: 5 MHz
Rel 7 HSPA+
DL: 42 Mbps UL: 11,5 Mbps BW: 5 MHz
Rel 8 HSPA+
DL: 84 Mbps UL: 23 Mbps BW: 10 MHz
Rel 9 HSPA+ DL:> 1 Gbps BW: 100 MHz LTE Advanced
Rel 10 LTE
DL:80 kbps UL:20 kbps
GPRS
DL: 14 Mbps UL: 11,5 Mbps BW: 5 MHz
Rel 6 HSPA
Diretoria de Engenharia e Operações – Planejamento Técnico
Operator Transport Network
Web Based Services
HSPA/LTE Wi-Fi xDSL
Operator Customers:
• Contract Obligations
• License Obligations
• Customer Prospect Cost
• Price Competition
Opeator Network:
• OPEX
• CAPEX
• License Obligations
Web Services:
• Lower Costs
• Minimum Risk
• Advertisement and Lower
Tariff Business Model
• Most important Telco
threat
ONT
ONU modem
MSAN/AGW
SGSN/MME
FTTx
But higher throughput enables services in the new web industry (over
the top), impacting severely the traditional operator business models.
Diretoria de Engenharia e Operações – Planejamento Técnico
Traffic and Revenue decoupling
Voice Dominant Data Dominant
Traffic
Revenue
New challenge: how to be profitable in data era?
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.
Diretoria de Engenharia e Operações – Planejamento Técnico
IMS
Access
Network
Transpor t Network
HSPA/LTE
ONU
FTTx
IP Multimedia Subsystem
Access Network
Transport Network
Internet Access
Multimedia
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
Billing
QoS
New Service Creation
Self Provisioning Service Portal
Session Control
Service Access Control
Privacy and Security
User Data
Control
Access
Network
Transpor t Network
HSPA/LTE
ONU
FTTx
Transport Service Only!!!
Diretoria de Engenharia e Operações – Planejamento Técnico
Internet
PLMN/
PSTN/SS7
What is IMS role in LTE?
BTS
Gs/Gd/
Sv/SGs
A-Bis
IuPS RNC NodeB
Iub
Uu
Um BSC
GSM/GPRS/EDGE
UMTS/HSPA/HSPA+
Gi
MSS
(SR-VCC) GMSS
(MGCF)
C/D C/D
Gr Gb
A
IuCS
Gn
Gc
SGSN
(MME/SGW)
HSS MGW
Mc
GTP-U
ENodeB S1
LTE/EPS
Uu
Cx Gx Gm
I-CSCF
Mw
Mw
IMS AS
ISC
PCRF P-CSCF S-CSCF
Rx
OCS
Ro
Gy
Mg
GGSN
(P-GTW)
Policy & Charging Control, introduced at beginning of IMS architecture, responsible to manage properly the network resources
based on service level requirements.
PCC gives to user applications the required and fair network resources based
on service business requirements.
Call Session Control, or core of IMS, responsible for establishing, billing, event
coordination, media and resources controlling and service development in
order to fulfill the service and application requirements.
In LTE, the IMS will replace the existing switch offices in CS Domain.
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.
There is no CS domain in LTE. The CS services, such as TDM calls and SMS, will be replaced (or migrated to) by services
under IP network environment.
Diretoria de Engenharia e Operações – Planejamento Técnico
Is LTE proper to transport voice services?
0 1 2 3 4 5 6 7
200kHz
PLMN/
PSTN/SS7
BTS
A-Bis
Um BSC
GSM/GPRS/EDGE
MSS/MGW
C
HLR
A
Logical and physical channels are structured in 8 TS, named TRX. The TRX capacity is 2,5 Erl @ 1% GoS
Services based on deterministic TDM network.
The spectral efficiency is 9 users per MHz
UMTS/HSPA/HSPA+
RNC
NodeB
Iub
Uu
Iu-CS
PLMN/
PSTN/SS7
MSS/MGW
C
HLR
Each 5MHz (3,84 MHz) carrier is able to
transport 125 voice channel. But the RF
limitation this number is around 60
channels, that corresponds 47Erl @ 1%
GoS
The spectral efficiency is 20 users per MHz
3,84MHz
LTE/EPS
ENodeB S1
Uu MME/S/PGW
Cx/Sp
HSS
IMS
PLMN/
PSTN/SS7
S1 Sgi/
Gm
S6a
Freq.
T.
TTI/2
180 kHz
There is no dedicated resources (channels)
for voice transport in LTE. The voice
services are based on VoIP, and the capacity
is function of statistical multiplexing
premises.
The spectral efficiency is 80 user per MHz
Diretoria de Engenharia e Operações – Planejamento Técnico
Path to Support Voice and Legacy Services
Voice over CS Domain
CSFB VoLTE
VoLGA
Diretoria de Engenharia e Operações – Planejamento Técnico
What is Circuit Switch Fall Back (CSFB)?
A/Iu-CS
Uu
LTE
ENodeB S1
MME/SGW/PGW
Abis/Iub
Um/Uu
GSM/UMTS
SGs
BSC/RNC BTS/NodeB
MSC
C
SGs
► 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.
HLR/HSS/AAA
PLMN/
PSTN/SS7
Diretoria de Engenharia e Operações – Planejamento Técnico
What is VoLTE?
Sv/SGs
Uu
LTE
ENodeB S1
MME/SGW/PGW
Abis/Iub
Um/Uu
GSM/UMTS
Gm/Rx/SGi
BSC/RNC BTS/NodeB
Cx/Sp
► 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.
HLR/HSS
AAA/SPR
IMS PSTN
A/Iu-CS
C
MSC
SR-VCC
PSTN
SCC AS
TAS
I2/I3
PLMN/
PSTN/SS7
Diretoria de Engenharia e Operações – Planejamento Técnico
What is VoLGA (Voice over LTE via Generic Access)?
A/Iu-CS
Uu
LTE
ENodeB S1
MME/SGW/PGW
Abis/Iub
Um/Uu
GSM/UMTS
A/Iu-CS
BSC/RNC BTS/NodeB
MSC
C
► 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
VANC
SGi/Sv
D’
HLR/HSS/AAA
PLMN/
PSTN/SS7
Diretoria de Engenharia e Operações – Planejamento Técnico
Strengths & Weaknesses
CSFB VoLTE VoLGA
Str
en
gth
s
No IMS investment
3GPP standard, and widely supported in several vendors -> no roaming problems
Voice and data services can be delivered in the same network
No need CS domain.
No IMS investment
We
akn
ess
es
Data sessions can be interromped during the voice calls.
Long call establishment time (at least 3 seconds more);
Não utiliza os benefícios da alta eficiência espectral do LTE;
Requires IMS introduction or expansion
In the first moment will not be ubiquitous and there will be roaming problems.
Not standardized by 3GPP
Only a single operator announced support
Needs terminal support.
Solves the problem for CS domain (legacy services)
Diretoria de Engenharia e Operações – Planejamento Técnico
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?
Diretoria de Engenharia e Operações – Planejamento Técnico
But IMS is not VoLTE only
3GPP ICS (IMS Centralized Services)
3GPP MMTEL (Multimedia Telephony Services)
GSMA RCS (Rich Communication Suite)
Diretoria de Engenharia e Operações – Planejamento Técnico
IMS Centralized Services
► Specified in 3GPP TS 23.292, provides all service
redefinitions, including over CS domain, for
developing based on IMS.
► All network services are provided via IMS
– Existing basic call and supplementary services
– New multi-media services (MMTel, Video etc.)
► Allows legacy UE access
– Best effort service delivery – up to the UE
capability
– Access adaptation – allows non-IMS UE to gain
access to IMS network
► Fixed and Mobile Convergence
– Agnostic to access network
– Guaranties fixed and mobile unified services
► Roaming support
– Industry standard
► Service continuity
– Can be supported in different network and
operaors
► Needed for SR-VCC
CSCF
I3
SCC AS
ISC
MSS/MGW
SGSN/
GGSN
TAS
Gm/I1
I2
ISC
Sv
Terminais (UE)
ICS (Interface I1 & Gm support)
Non ICS
MSC Server
Must support I2 and I3 interface functioonalities
SCC AS (Service Centralization & Continuity) AS
ICS User Agent
CS Access Adaptation
Service control funcionalities (I1): Registration, Call Control,Service Continuity
Diretoria de Engenharia e Operações – Planejamento Técnico
Core
Mobile
Network
Metro
Ethernet
Par de Fios
MSAN BRAS
ONT
OLT
FTTx
Metro Ethernet
IMS Centralized Services Access Network
BTS
Rede 2G
BSC
RNC NodeB
Rede 3G
ENodeB
LTE/EPC
MME/PGW
Transport & IP Backbone
IMS
x-CSCF
MGCF
MGW
AS PCRF
BGCF
IBCF
IBGF
MRFC
MRFP
Application & Services
TAS
SCC
MMTEL
IM SSF
Delivered Services
VoIP
Complete MMTEL
Boadband
QoS
IP Enriched services
IPTV over IMS
Real Time Services
PTSN Simulation
Voice over CS
Partial MMTEL
Low data rate
IP Services
Voice over CS (UMTS only)
VoIP
Complete MMTEL
Boadband
QoS
IP Enriched services
IPTV over IMS
Real Time Services
PTSN Simulation
HLR/
HSS/AAA
Diretoria de Engenharia e Operações – Planejamento Técnico
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.
Diretoria de Engenharia e Operações – Planejamento Técnico
RCS (Rich Communication Suite)
Enriched Call Voice calls with
multimedia content
sharing
Enhanced
Messaging Conversational
message experience
Enhanced
Phonebook Agenda
Advanced presence
functionalities
► 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;
Diretoria de Engenharia e Operações – Planejamento Técnico
The overall IMS framework is still evolving
DL:237 kbps UL:59 kbps
EDGE
DL:1,89 Mbps UL: 947 kbps
E-EDGE
DL: 326 Mbps UL: 86 Mbps
20 MHz
Rel 8 LTE
Self Organized Network
Rel 9 LTE
DL: 28 Mbps UL: 11,5 Mbps BW: 5 MHz
Rel 7 HSPA+
DL: 42 Mbps UL: 11,5 Mbps BW: 5 MHz
Rel 8 HSPA+
DL: 84 Mbps UL: 23 Mbps BW: 10 MHz
Rel 9 HSPA+
DL: 168 Mbps UL: 23 Mbps BW: 20/10 MHz
Rel 10 HSPA+
Firs specification in 2002
Rel 5 IMS
2008- 2008 2009 2010 2011
First specification in 2002
Rel 7 MMTEL
Evolved Pack Core & Common IMS - Release 8
EPC
DL:> 1 Gbps BW: 100 MHz LTE Advanced
Rel 10 LTE
First specification in 2009
VoLGA
First specification SR-VCC Rel.8
ICS & SRVCC
First specification in Rel.8
CS Fall Back
Ac
ce
ss
Netw
ork
C
ore
Ne
two
rk a
nd
IM
S
Operator iniitiative
OneVoice IMS
GSMA initiative announced in february 2010.
VoLTE GSMA
Diretoria de Engenharia e Operações – Planejamento Técnico
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.
