5G World 2016

Cédric Bonnet - Orange

London – June 30th, 2016

VoLTE Roaming: an opportunity

for new business models

1

2

VoLTE Roaming: an opportunity for

new business models

S8HR: a false good idea

LBO with no MTR:

a business evolution proposal

5G World - VoLTE Roaming: an opportunity for new business models

S8HR: a false good idea

VoLTE Roaming: the 2 main models in a nutshell:

Voice (LBO) or Data (S8HR) oriented

Local Breakout (LBO)

– Standardized and enhanced since 2010

– Visited network is service aware (voice oriented)

– 2 routing possibilities (Visited Routing or Home Routing)

– Same business model as Circuit Switch Voice

Concerns on complexity to deploy

S8HR

– Introduced by GSMA in 2014

– Still under 3GPP normalization (until 2017)

– Visited network is a bit pipe (data oriented)

Technical concerns on local services and lawful obligations

Business concerns on value deflation

5G World - VoLTE Roaming: an opportunity for new business models

VPMN HPMN

IMS

Carrier (IPX)

IMS IMS

Voice Voice

Value deflation

Quality deflation

Service deflation

Voice Operator vs. Voice OTT

5G World - VoLTE Roaming: an opportunity for new business models

Operators

Universal-Interoperable

QoS

Chargeable

Backward compatibility

OTT

Community

Best effort

Free

Standalone

LBO S8HR

S8HR: complexity and costs to come Based on 3GPP T3 23.749 and TR 33.827 outputs

5G World - VoLTE Roaming: an opportunity for new business models

• New IMS/PCC procedures

• Impacts on P-CSCF and PCRF Retail

Charging

• No support of eSRVCC

• Lots of IOT tests to achieve Voice

Continuity

• Impacts on VPMN and HPMN

• Impacts on UE and procedures Emergency

Calls

• IPSec to be deactivated at IMS

• Virtual P-CSCF to add in VPMN Lawful

interceptions

Common mistakes about VoLTE Roaming

5G World - VoLTE Roaming: an opportunity for new business models

« LBO = RAVEL »: FALSE

– 2 variants, Home Routing and Visited Routing: using one architecture

or the other is under HPMN decision and on a Call by Call basis.

– You can even start without deploying the VPMN loopback (RAVEL)

– In S8HR, however, you’ll never have the choice.

« With LBO HPMN do not control its customers »: FALSE

– Whatever the chosen architecture (S8HR, LBO HR, LBO VR), the

HPMN handles the call control.

– S-CSCF and AS (for services) are ALWAYS located in the HPMN!

« With LBO, you need to use VPMN IMS »: PARTIALLY FALSE

– Only the IMS edge equipment (P-CSCF) is triggered in the VPMN.

– The other equipment, that have difficult integration with devices (S-

CSCF, HSS, TAS…) remain in the HPMN.

Conclusion – S8HR was a false good idea

5G World - VoLTE Roaming: an opportunity for new business models

S8HR would have been a good idea for voice OTT

services in Roaming

Operators are not OTTs: Complexity and costs

would come with S8HR!

Moving to OTT services may lead OTT to come on

operator services!

LBO has been designed to meet both operators

and customer expectations

LBO with no MTR: a business evolution proposal

Let’s discuss the business model of the interconnection

between VPMN and HPMN for roaming VoLTE (LBO case)

5G World - VoLTE Roaming: an opportunity for new business models

HOME

MNO

EPC EPC

EPC

EPC

S8

Data

Roaming

Roaming

IMS Signaling

+ media

Interco Interco

Interco

S8 Home Routing LBO Home Routing LBO Visited Routing

Voice Service oriented model

(LBO)

Data oriented model

(S8HR)

IMS

IMS

IMS

IMS

Roaming

IMS Signaling

HOME

MNO

Visited

MNO Visited

MNO

Visited

MNO

Interco IMS HOME

MNO

Scope

IMS NNI

Technically, Roaming IMS and interconnection IMS are SIP

based (IMS-NNI) but with some specifies

5G World - VoLTE Roaming: an opportunity for new business models

IPX

Service Roaming IMS Interco IMS

Technical

Differences

• Registration

• SMS

• Only SIP (no Media) for LBO/VR

• ENUM (NP and user profile)

• Voice Breakout to legacy (if B user is not IMS)

Visited

Home

IMS A Sender

IMS B Receiver

IMS Roaming service IMS Interconnection service

SIP Proxy IPX SIP Proxy

Proposal: remove MTR cascaded model for VoLTE

roaming traffic (LBO)

5G World - VoLTE Roaming: an opportunity for new business models

• High coupling between roaming

and interconnection

• Complex Roaming IoT, depending

on interconnection cost

Challenges

Remove MTR cascaded model for

roaming traffic between Visited IMS

and home IMS (for MOC/MTC)

SIP/media exchanged between visited

and home will be transported by

carrier with a signaling model

Able to charge roaming terminating

calls in roaming IoT using TAP

(instead of MTR)

Valid for LBO/HR (sig/media on NNI)

and LBO/VR (only sig on NNI)

Proposal

Interconnection for roaming VoLTE should be a

technical enabler using signaling

5G World - VoLTE Roaming: an opportunity for new business models

MINs

SIG

Voice

(Circuit)

Roaming Wholesale Interconnection Wholesale for roaming traffic Voice Technology

Mobile Terminating Rate

Today

Futu

re

SIP signaling

Minutes Visited Home

MINs VoLTE

(LBO)

Mobile Terminating Rate

Minutes Visited Home

VoLTE

(LBO) Minutes Visited Home

OR

In any case, non-roaming Voice Interconnection between operators

remains on per minute basis!

Proposal is consistent with SMS business model

5G World - VoLTE Roaming: an opportunity for new business models

Roaming Wholesale Interconnection Wholesale for roaming traffic Technology

Today

Nbr SMS SMS Visited Home SIG

SS7 signaling

SIG

Futu

re

SIP signaling

SMSoIMS

(LBO) Visited Home Nbr SMS

Non-roaming SMS Interconnection between operators still remain

on per message basis!

Conclusion – LBO with no MTR:

An opportunity to ease wholesale and retail offers

5G World - VoLTE Roaming: an opportunity for new business models

VoLTE Roaming (LBO) brings a new dedicated interconnection leg, that

didn’t exist in legacy networks.

There is an opportunity to define simplified business models.

The proposal is to consider VoLTE Roaming as a Signaling

interconnection rather than a cascaded MTR interface with no impact on

the classic non-roaming interconnection.

Main Benefits:

– Reduce complexity on the interconnection

– Consistent wholesale charging principles for LBO and S8HR

– Allow to develop Roaming retail offers

Fraud Architecture

RCS

Interconnection LTE MSISDN

CAP

M2M EU REG LBO

3GPP

MAP

GSMA

I3

MVNO

IREG

TADIG

WIFI

ORLCF

Alliage

SoR GLR

Hubbing GRX

IPX

SHR DATA

Voice

SMS

MMS

HLR MSC

SGSN

GGSN

Applet

WSMS

TAP NRTRDE

CRIPP

QOS

CEC

training

BEREC

MME

PCRF

E2E

SIM

Hermes

Mercury

Saturne

2G

3G

4G

IMSI

IMEI

GPRS

SIF

SMS control

Dual IMSI

SMSC

ABS

HUR

CDR

SS7

Skill center Prepaid

Postpaid

Diameter

Billing

Operation

Services

DNS

Performance

Roaming

VoLTE

Sigtran

LBO Flash IP

VoIP

Apps

USIM

RAEX

IOT

SIP

ISUP

OTA

GSM

UMTS

PLMN

VLR

ETSI OPEX

CAPEX

MVNE

TCAP

IMS

HD

OLN

AMEA

EME 2.5G

DRF

MNP

Rin

Rout

ARP

DSP

STP IPv4

IPv6

API

NOSC

hub

planning

project

OMA

carrier

RFP

RFI

IT

MS

MSISDN

Camel

Charging

SBC

CTI

simbox

OCSI

MOC

MTC

wholesale

retail

ISD

NITZ

OR

RBE PP

DCH

FCH

SCP

INAP

OCS

CFU

CF

CLI

CRBT

EPC

GMSC

VHE

GSE

ODB

PSTN

VPN

WLAN

Thank You!