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Voice over LTE: Industry, Standardization
and Market Realities and Perspectives
Carl Ford, Crossfire Media
Dan Warren, GSMA
Manuel Vexler, Huawei
IMTC VoLTE
Webinar
Stefan Svensson, Ericsson
Anatoli Levine, RADVISION Geng Wu, Intel
• How to ask questions:
– Twitter @IMTCORG ((http://twitter.com/imtcorg)
– Skype chat: imtcorg
• Presentation will be available at IMTC
SlideShare Account:
http://www.slideshare.net/imtcorg
Voice over LTE: Industry, Standardization and Market
Realities and Perspectives
2
© GSM Association 2011
VoLTE Background and extensions Dan Warren, Senior Director of Technology, GSMA
VoLTE – to date
History – „One Voice‟ profile handed to GSMA and became IR.92, the UNI SIP
Profile for UE to IMS network.
– First version of IR.92 completed April 2010 - continuing improvements via
GSMA CR process.
Roaming and Interconnect (and in particular the combination of the two), have
proved difficult to complete.
– Technically optimal approaches do not take into account the need to interwork
or fall back to existing Circuit Switched techniques.
– Commercial requirements further restrict the technical solution.
– Work in 3GPP initiated to address the requirements – RAVEL work item.
Now, work to extend beyond the original VoLTE service has spawned new threads
of work.
Current status of VoLTE
VoLTE service expected to appear first in North America during late 2011/early
2012.
– Device implementation combines VoLTE with Wideband codec, Video, RCS.
– Baseband implementation but expected to have OS accessibility to some IMS-
based features.
In the meantime, Europe and Asian operators likely to launch first with CSFB.
– Delays in SR-VCC capability making CSFB a likely first Voice deployment for
many operators.
– CSFB still viewed as sub-optimal - improvements in set-up time for CSFB being
proposed in 3GPP.
Everyone is heading to VoLTE – just taking different paths to get there.
VoLTE Extensions
To be enhanced once 3GPP work is complete
IMS with
CS voice
UNI profile
Over 3G
The original One Voice profile with enhancements
Under approval
Terminal to Network
LTE access Network
Under approval
3G access
IR.64 – IMS control for all voice calls
Two main features: Terminating Access Domain Selection
– Determine whether to route terminating
call to CS or PS access
Single Radio Voice Call Continuity
– Maintains IMS call control when moving
from LTE to 2G/3G CS
Service Centralization in the IMS: IMS “controls” both circuit and packet voice calls
IMS
T-ADS
CS
PS
IMS
CS
PS
SRVCC
IR.94 – Video over LTE
Network Network
Network
Normal call with voice and video
mono or bidirectional
Multi party call with voice and
video
Network
Dial-in to external video conference
system
Video switching Video switching
Early media
(video announcement, video ring “tone”,
…)
IR.58 – extension of IR.92 to 3G HSPA bearer
Minimum mandatory set of 3GPP features that a wireless device and network are
required to implement in order to guarantee an interoperable, high quality IMS-based
telephony service over HSPA
Other
functionalities
Bearer
management
LTE radio
capabilities
IMS
media
IMS
features
Other
functionalities
Bearer
management
HSPA radio
capabilities
IMS
media
IMS
features
IR.92 IR.58 IR.58 is very similar to IR.92 (IMS profile for
voice and SMS over LTE) and inherits as much
as possible from IR.92, in particular:
The document framework, with similar
corresponding section numbering whenever possible
The document contents, with a simple reference to
IR.92 when the content is agreed to be equivalent
How to prove it works - IOT
IMTC SuperOp, May 2011
– Handset focus but struggled with lack of handsets
available from vendors.
– IMTC hosting a VoLTE webinar – 30th Nov.
MSF VoLTE Interoperability Event, September 2011
– Hosted by Vodafone and China Mobile.
– Demonstrated calls, interconnect and roaming.
– Detailed results announced 8th November.
– Planning further IOT on VoLTE with GSMA and ETSI
for 2012.
HUAWEI TECHNOLOGIES CO., LTD.
VoLTE (and SMS over LTE!):
An Infrastructure and Device
Manufacturer Vendor
Prospective
Nov. 2011
Manuel Vexler Chief Marketing Officer IMS/NGN
HUAWEI TECHNOLOGIES CO., LTD. Page 13
Planning considerations for VoLTE and SMSoLTE
Mobile Operators
Forecast
Voice will be the primary
income source in next five
years
Mobile voice will
continue to be in high
demand from consumers $640
$660
$680
$700
$720
$740
$760
$780
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
2009 2010 2011 2012 2013 2014
Is mobile SMS
growing at the
expense of
mobile voice?
HUAWEI TECHNOLOGIES CO., LTD. Page 14
VoLTE Prospects 2012-2015
Voice is mandatory for EPC/LTE launching plans
2010.12.24 LTE launched,
in 2015 LTE will cover
70% population, on
2012.3 launch VoLTE
2011Q2 LTE will launch, in
2013 LTE will cover whole
US, and in 2013 will
launch VoLTE；
2010.12.05 LTE launched,
in 2013 LTE will cover 2/3
population, in 2012Q4
VoLTE will be launched
2010.12.01 LTE launch,
on 2011Q4 support CSFB；
24
166
HUAWEI TECHNOLOGIES CO., LTD. Page 15
• GSMA IR92.30 (VoLTE Profile)
• 3GPP R10 (MMTel、ICS、eSRVCC、PCC）
• GSMA RCS 2.0/3.0/4.0
• Clear Roadmap from major supplier
• 100+ kinds of LTE devices are available now
• 6 of which are handsets
• More handsets in pipeline
Launch LTE Service in 2010.Dec：
• HTC Thunderbolt
• Motorola DROID Bionic 4G
• LG Revolution
• Samsung 4G LTE Smartphone
Will launch LTE Service in 2011H1
• What will happen on terminal side ?
Terminal side: Development of LTE handset is speeding up
GSMA VoLTE
Initiative
Network side: Standard & technology approach mature
• QC smart phone chipset roadmap: 2011H2
• Expected IMS/SRVCC handset: 2012H2
Smartphone ES:2Q2011
CS:4Q2011
Modem
(LTE/HSPA+)
CS:3Q2010
Modem+VOICE
(HSPA+/LTE
TD-SCDMA)
ES:4Q 2011
Fast Developing Ecosystem: 100+ LTE Devices Available
HUAWEI TECHNOLOGIES CO., LTD. Page 16
VoLTE end-to-end: a phased approach
Initial LTE Voice Solution
LTE CPE/USB Dongle
Initial LTE mobile voice
Early LTE handset
Target LTE mobile voice
LTE VoIP handset
2011 2012 2013
Voice over CPE/Dongle
2011 ~
CS Voice, LTE Data
2011H2 ~
VoIMS/SRVCC
2012H2 ~
•SMSoSGs for LTE data card •VoIP over LTE CPE •VoIP/RCS via Soft client + LTE USB dongle
•CSFB Commercialization •Other LTE voice options
•IMS/SRVCC commercialization •Coexist of CSFB &IMS，early handset &
inbound roamer support •Service consistence via ICS arch.
VoIMS/SRVCC Trial
2011~2012H1
2014
VoLTE
Opportunity
HUAWEI TECHNOLOGIES CO., LTD. Page 17
CTAS
CTAS
RCS AS
SingleSDB (HLR/HSS/PC
RF)
SingleCORE (CS、IMS)
SingleEPC
2G/3G
LTE
MGW MSC-S IMS
Core
SBC
Fixed、Mobile
FMC/ICT Service…
IM、Presence、NAB、sharing
Terminal Network Service
Strategy：
• Diverse LTE terminals
Solution：
• VoIP capable LTE CPE
• VoIP/RCS Client + LTE Date card
• Mobile VoIP capable LTE handset
Strategy：
• Keep it simple as possible
Solution：
• SingleCORE
• SingleEPC
• SingleSDB
Strategy：
• Enriched end user experience
•Solution：
• RCS & integration with SNS
• HD Voice and Video Call
• FMC & ICT convergent service
Huawei E2E VoLTE Solution Overview
HUAWEI TECHNOLOGIES CO., LTD. Page 18
Summary
Network Evolution
Challenge:
Difficult to upgrade existing
CS/HLR
Huawei response:
Keep them ‘as is’ and
minimize the impact to
existing network
Complexity Challenge:
Multiple cores used to
deliver, voice, video and
connectivity in LTE
Huawei response:
SingleCORE
End User Acceptance
Challenge:
Must ensure voice quality
and rich experience
Huawei response:
SRVCC/eSRVCC, HD
voice & video, RCS, and ICT convergence…
Thank you www.huawei.com
Copyright©2011 Huawei Technologies Co., Ltd. All Rights Reserved.
The information contained in this document is for reference purpose only, and is subject to
change or withdrawal according to specific customer requirements and conditions.
HUAWEI TECHNOLOGIES CO., LTD. Page 20
Enrich experience Simple Easy to deploy
Aggregation design in
SingleCORE@Mobile solution
SE2600
Common
TAS
(ATS9900)
MSC-S
(MSOFTX3000)
SingleSDB
MMTel
SCC AS IP-SM-
GW
Fixed
voice
IBCF
MGCF
VIG
Server
mAGCF
SBC
P-CSCF
ATCF
ATGW
SAE-
HSS
HLR
IMS-
HSS
PCRF
Anchori
ng
IM-SSF
SRVCC
IWF
CSFB
Proxy VoLTE/VoBB PSTN renewal
key role in FMC evolution
ATCF/ATGW is defined in 3GPP R10 for eSRVCC
ENUM/
DNS
VOLTE – Ericsson perspective
Stefan Svensson Senior Product Manager,
Telephony Evolution
Business Unit Networks
Volte is happening now
Operators planning commercial launch mid-2012
Network vendors providing products/solutions
Terminal industry moving into IODT/IOT phase
LTE deployed on frequencies relevant for VoLTE
LTE coverage increasing fast
VOLTE - network and service evolution
Spotty LTE coverage Areas with continuous
LTE coverage
Continuous IMS voice
over PS coverage
CS LTE
LTE
LTE LTE
CSFB
LTE
LTE LTE
LTE LTE LTE
LTE
LTE LTE
LTE
LTE LTE
LTE LTE
LTE LTE
LTE
LTE LTE
LTE LTE
LTE LTE LTE
LTE
LTE LTE
LTE
LTE LTE
LTE LTE
LTE LTE
LTE LTE
LTE
LTE LTE
3G / HSPA CS LTE LTE LTE
LTE LTE
LTE LTE
LTE LTE
LTE LTE
LTE
SRVCC
LTE
LTE LTE
LTE LTE
Multi-media Extended supplementary
services
Multi-access Multi-device
VoLTE (IR.92/94
)
Network
Evolution
Service
Evolution
End-to-end approach to ensure telecom
grade services
LTE
EPC
NETWORK
MANAGEMENT
IMS and
MOBILE CORE
Sofia:
Luigi is amazing
CHOOSE A SPONSORCHOOSE A SPONSOR
Drag and drop any
sponsor into your
address book and get
free messaging and gifts!
DEVICES
0
50
10 0
150
20 0
250
30 0
Lab
test
Field
test
SPD [ms]
UE delays
Estimated AMR delay
Average RTP latency
0
1
2
3
4
5
6
Call set-up time[s]
IDLE-IDLE IDLE-CONNECTED CONNECTED-IDLE CONNECTED-
CONNECTED
Lab tests
Field tests
Volte is happening now
Realization happens now
Technology efficiency & superior end-user experience
Industry aligned
VoLTE - beyond voice communication
“End-to-end” for optimized introduction
Slide title
Do not add objects or
Public | © Ericsson AB 2011 | 2011-11-30 | Page 26
VoLTE – Intel Perspective
Dr. Geng Wu
Chief Architect
Wireless Technology Division
But deliver different, fragmented experiences
Many Connected Compute Devices
Our Goal: Improve the Experience
Desktops Laptops Embedded Smartphones Tablets Smart TVs Netbooks
Enabling a Consistent Experience Across the Continuum
VoLTE Offers Extensive Capabilities
Basic Services
requirements Voice
SMS Emergency
call
Interoperability
requirements
Circuit Switched
Fallback (CSFB)
Single Radio Voice
Call Continuity (SRVCC)
Packet switched
handover
HD Voice
Video and multimedia
Converged services
Video/Audio
Conferencing
Roaming
Other services
QoS (reserved BW)
Supplementary
services
Voice: AMR codec, WB-AMR
optional
Security: IMS AKA for authentication
and encryption
Supplementary services: 3GPP
MMTel TS 24.173
Emergency Call: 3GPP Release 9,
TS 23.167
SMS over IP: 3GPP TS 23.272,
TS23.221,TS 24.301
SRVCC : 3GPP TS 23.216,
optional
CSFB : 3GPP TS 23.272
Signaling Compression: 3GPP TS
24.229
Security
Enable value
added services
Standard based on
3GPP
Rigorous Testing Process is Essential
VoLTE
Devices
LTE RAN IMS Gateway
IMS Enabled
MGW
Internet
Legacy RAN
IP
Backhaul
Legacy
phones PSTN
Provisioning VoLTE
server
Services
server
VoIP/SIP
Devices
IP Multimedia Subsystem IP based operator network
Thank you!
Name: Title:
Voice over LTE: Software Vendor and
IMTC IMS AG Perspective
Tsahi Levent-Levi CTO, Technology Business Unit and Co-Chair, IMTC IMS AG
Anatoli Levine Sr. Director, Product Management and President, IMTC
Interoperability
Standard ≠ Implementation
Signaling
Capabilities
Media
Technologies
Telecom Standardization Process
VoLTE
Specification
Implementation
Testing IOT testing
Certification
Telecom Standardization Process
VoLTE
Specification
Implementation
Testing IOT testing
Certification
Telecom Standardization Process
VoLTE
Specification
Implementation
Testing IOT testing
Certification
R&D
Telecom Standardization Process
VoLTE
Specification
Implementation
Testing IOT testing
Certification
R&D
QA
Telecom Standardization Process
VoLTE
Specification
Implementation
Testing IOT testing
Certification
R&D
QA
Telecom Standardization Process
VoLTE
Specification
Implementation
Testing IOT testing
Certification
R&D
QA
What does the IMTC IMS AG Does?
Test specification
Read the standards
Write test cases related to interoperability
F2F Events
Test products of different vendors
Report back specification “bugs” to the GSMA
Benefits of IMTC
By Engineers for Engineers
“devoid” of politics
Focus on implementations and testing
Where are the Software Vendors?
VoLTE
Specification
Implementation
Testing IOT testing
Certification
R&D
QA
Protocol stacks and IMS clients supporting VoLTE to ease development effort of vendors
Testing tools for development, testing and certification of VoLTE products
Want To Know More?
Visit our site – www.imtc.org
Blog – blog.imtc.org
Email [email protected]
Or contact :
IMTC Secretary
IMTC, Inc.
2400 Camino Ramon, Suite 375
San Ramon, CA 94583
Phone : +1.925.275.6600
Fax : +1.925.275.6691
Email : [email protected]
44
Carl Ford, Crossfire Media Dan Warren, GSMA Manuel Vexler, Huawei
Thank You!
Stefan Svensson, Ericsson Anatoli Levine, RADVISION Geng Wu, Intel
