VoLTE Adoption Status and Challenges

slide 2 | BICS confidential | 29 June 2016

OTTs are Cannibalising Traditional Voice Revenues

Is FREE the Catch Word

or

Is it Enhanced Ubiquitous User Experience?

Ovum 2015

slide 3 | BICS confidential | 29 June 2016

VoLTE offers Last Chance for Operators to revive its

Service Offering

VoLTE is the

‘premier’

communication

service over 4G

LTE is going strong:

LTE -> LTE-A (pre 5G) -> 5G

Voice will onboard LTE

between 2016-2020

Worldwide LTE Deployment Status

29/06/2016 BICS Confidential 4

GSA forecasts 550+ commercially launched LTE networks by the end of 2016

500+

operators 165 countries

1.3 Bio

subscribers

National VoLTE Deployment Status

29/06/2016 BICS Confidential 5

430 devices VoLTE ready 65% Mobile Networks

VoLTE ready by 2020

5

25

4

Americas

Africa

Asia

55 Operators have launched VoLTE in 34 Countries

19

Europe

1 ME

GSMA, 31 May 2016

IMS enables Next Generation Communication Services

29/06/2016 BICS Confidential 6

Communicate Anytime,

Anywhere,

Any Device Use any device,

any access

network/technology

SEAMLESS MOBILITY

ENHANCED SERVICES VoLTE, ViLTE, VoWiFi,

RCS, SMSoIP

UBIQUITY Global interoperability,

reachability

E2E QoS

QUALITY OF SERVICE

Operator Challenges for International VoLTE

29/06/2016 BICS Restricted 7

Operators have multiple challenges to deploy

VoLTE internationally:

Technical Challenges:

• International interconnects TDM to IP migration

• Upgrade infrastructure - NNI

• Carrier ENUM support

• Devices compatibility

• Multiple Roaming solutions

• eSRVCC support

Financial Challenges:

• Lack of Business Case

Strategic Challenge:

• Should Operator define its role as smart pipe?

Competition:

• OTTs are offering advanced communication services with global

interoperability and fast Time-to-Market

Key Success Criteria

29/06/2016 BICS Restricted 8

User should have same enhanced

communication experience when at home

and while roaming

International VoLTE is a two step process:

• Inter-working between Operators’

networks

• Roaming in other networks

Operator and IPX-P collaboration can enable services with global reach:

• Offer integrated Voice – VoLTE and WiFi Calling

• Offer Video over LTE

• Offer RCS

slide 9 | BICS confidential | 29 June 2016

IMS Inter-NNI between Operators Operators / IPX Provider Inter-co

SIP Proxy

slide 10 | BICS confidential | 29 June 2016

IPX enables Global Inter-operability

Smartphone D

VoLTE Network D

VoLTE Network C

Smartphone A

VoLTE Network A

Smartphone B

Smartphone C

VoLTE Network B

SIP Proxy/Hub

IPX

• Max 2 IPX hops in compliancy to GSMA IR.34 PRD guidelines

• Routing Transparency

• Interworking between different IMS releases

• SIP-IMS, SIP I, SIP T Signalling Protocol Inter-working

• including break-out to Legacy Voice

• B2BUA while normalising SIP parameters

• Real-time Codec negotiation and transcoding (if needed)

slide 11 | BICS confidential | 29 June 2016

VoLTE Network D

VoLTE Network C

SIP Proxy/Hub Smartphone A

VoLTE Network A

Smartphone B

Smartphone C

Smartphone D

Mediate interactions between networks

Normalize differences between networks

Identify call scenarios and charge accordingly

VoLTE Network B

IPX enables VoLTE Roaming Solution

slide 12 | BICS confidential | 29 June 2016

IPX enables Data driven VoLTE Roaming S8 Home Routing

IPX preserves the DSCP marking for Real time and Non-Real Time traffic

IPX

Accelerate VoLTE Adoption with ENUM Delegation

Op A Op B

ENUM

IMS

NNI

Op A Op B

ENUM

IMS

NNI

IPX

Bilateral

Hubbing

User A

(IMS)

User B

(IMS)

User B

(IMS)

User A

(IMS)

GSMA SONG V2 Proposal

Support Current and Future Voice Select NNI based on ENUM response

Op A IPX (s) Op B IMS

NNI

IMS

NNI

Non IMS

NNI Op B

ENUM

ENUM

response

Preferred

NNI

Op B User B IMS IMS

Op B User B non

IMS

Non IMS

Op B - IMS

- - IMS

Hubbing

“Select IMS NNI until non IMS B confirmation”

User A

(IMS) User B

(IMS)

User B

(IMS)

GSMA SONG V2 Proposal

For more information visit

WWW.BICS.COM

Divya Ghai Wakankar

divya.wakankar@bics.com