Wi Fi Calling – Slides

8/17/2019 Wi Fi Calling – Slides

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WI-FI CALLING – A POWERCUSTOMER RETENTION TO

JOHAN TERVE, VP MARK


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ABOUT APTILO NETWORKS

• Market leader in Wi-Fi Service Management

• 100+ deployments in 70 countries

• Critical component for Wi-Fi calling & offloading

• Software solution & cloud service

• Reliable partner to leading telecom vendors

• HQ in Stockholm, Sweden


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OUR PRODUCT APTILO SMP


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SOME OF OUR CUSTOMERS100+ Carrier Wi-F

in more than 70 c

http://english.fetnet.net/


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WHY SHOULD OPERATORS CARE ABOUT W

WHAT IS NEXT-GENERATION WI-FI CALL

BENEFITS OF WI-FI CA

WHAT ABOUT QOS FOR WI-FI CAL

IS IT REALLY ENOUGH TO RELY ON A STANDARD 3GPP

TURNKEY SOLUTION OR BEST-OF-BR

CALL FLOWS IN NEXT-GENERATION WI-FI CA

AGEN


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THE TELECOM LANDSCAPE IS CHANGING

Mobility

Content(TV, Games etc.)

Basic

Rich

MobileFixed

MNO

Cable

MSO

Reason Cable M

to go

#1Fast

Slow


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LandlineWhy?

SIM-Card?What about my

other devices ?

Reason for Cable MSOand MNO to go

#2AND

NEW WAYS OF THINKING BY THE YOUNGER GENERATION


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Wi-Fi will prevail !

It’s up to Cable MSOs and MNOs

to capture this opportunity.

#3 reason


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WHAT IS THE COST OF CHURN?

0

50

100

150

200

250

T-Mobile, NL T-Mobile, AT KPN, NL EE, UK

E U R p e r c o n t r a c

t c u s t o m e r

The cost of churn and c

prevention is typically arou

of mobile service revenu

some cases above 20

www.tefficient.c

Source:

EURUSD268

214

161

107

54

This is 1.5-2.5 Billion /

for a 10 Billion operato

What if Wi-Fi could rethis by just 10%?

150+ Million is a dece

Wi-Fi budget!

Cost to recruit a new customer, compensating for the one that churned

http://www.tefficient.com/http://www.tefficient.com/


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CAN WI-FI ATTRACT NEW CUSTOMERS?

58% of respondents (and more for 4G swould churn to a mobile operator th

provided public Wi-Fi connectivity a

part of the subscription

Surveys aren’t the same as reality, but results signal how strong value there is in

Arqiva and Analysys Mason primary research on 2000 UK respondents http://www.arqiva.com/downloads/public-wi-fi-in-a-4g-wor

http://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.htmlhttp://www.arqiva.com/downloads/public-wi-fi-in-a-4g-world.html


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AGEN


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NATIVE WI-FI CALLING

Example of user experience : iPhone 6


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NATIVE WI-FI CALLING ON IPHONE 6

T-Mobile’s Wi -Fi

Calling symbol

LTE

strength Operator

Wi-Fi

Calling

Symbol

Wi-Fi

strength



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NATIVE WI-FI CALLING ON IPHONE 6

Same voice dialer

Same phone number



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WHAT IS NEXT-GEN WI-FI CALLING?

Wi-Fi

LTE

Wi-Fi RAN

S-GW

ePDG

P-GW

LTE RAN

Voice over Wi-Fi (VoWi-Fi)

Voice over LTE (VoLTE)

IMS Core

VoLTE/VoWi-Fi


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Wi-Fi

LTE

Wi-Fi RAN

S-GW

ePDG

P-GW

LTE RAN



Native support:

• VoWi-Fi

• VoLTE

• Call Transfer

VoWi-Fi VoLTESame

Dialer

1

IMS Core

VoLTE/VoWi-Fi


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Wi-Fi

LTE

Wi-Fi RAN

S-GW

ePDG

P-GW

LTE RAN



Native support:

• VoWi-Fi

• VoLTE

• Call Transfer

VoWi-Fi VoLTESame

Dialer

1

Secure IPSec tunnel

going through ANY

Wi-Fi Network

2

IMS Core

VoLTE/VoWi-Fi


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Wi-Fi

LTE

Wi-Fi RAN

S-GW

ePDG

P-GW

LTE RAN



Native support:

• VoWi-Fi

• VoLTE

• Call Transfer

VoWi-Fi VoLTESame

Dialer

1

Secure IPSec tunnel

going through ANY

Wi-Fi Network

2

ePDG terminating

IPSec and connecting

with P-GW

3

IMS Core

VoLTE/VoWi-Fi


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Wi-Fi

LTE

Wi-Fi RAN

S-GW

ePDG

P-GW

LTE RAN



Native support:

• VoWi-Fi

• VoLTE

• Call Transfer

VoWi-Fi VoLTESame

Dialer

1

Secure IPSec tunnel

going through ANY

Wi-Fi Network

2

ePDG terminating


with P-GW

3

IMS with support fo

VoWi-Fi and VoLTE

connecting to PSTN

4

IMS Core

VoLTE/VoWi-Fi


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Wi-Fi

LTE

Wi-Fi RAN

S-GW

ePDG

P-GW

LTE RAN



Native support:

• VoWi-Fi

• VoLTE

• Call Transfer

VoWi-Fi VoLTESame

Dialer

1

Secure IPSec tunnel

going through ANY

Wi-Fi Network

2

ePDG terminating


with P-GW

3

IMS with support fo

VoWi-Fi and VoLTE

connecting to PSTN

4

3GPP

Authen

and Aut

the Wi-

ser

5

IMS Core

VoLTE/VoWi-Fi

3GPP


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AGEN


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WI-FI CALLING BENEFITS - SUBSCRIBER

• Cellular Voice / Text Services reach into my home

• I can cancel my landline and rely on mobile only

• Seamless experience

• Integrated into my smartphone

• Calls transfer LTE Wi-Fi without interruption

• I can make calls from abroad using local rates

• At least if my operator applies T-Mobile’s policy

• HD voice calls

• Faster Call SetupAlso available for VoLTE


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WI-FI CALLING BENEFITS - OPERATOR

• Enhanced indoor coverage improves customer satisfaction

• Same charging models as for cellular voice

• Roaming may be a game changer in the industry

• No need to invest in femtocells or DAS to cover residents

• Large savings in both CAPEX and OPEX

•Small Cells still an option for dense areas

• Back in the driving seat – OTT less important for subs.

• Works over any Wi-Fi connection

• Low barrier for operators with existing IMS

• Only need to deploy ePDG and 3GPP AAA

• First mover will attract new subscribers


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AGEN


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QOS – GLASS HALF FULL OR HALF EMPTY


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Wi-Fi has limitedQoS control !


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Limited QoS

guarantee indoors

anyway for cellular !

Outdoor

Signal -30 db

1 watt


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Limited QoS

guarantee indoors


Outdoor

Signal -30 db

1 watt

I can control

QoS in myown Wi-Fi.

QOS GLASS HALF FULL OR HALF EMPTY


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Limited QoSguarantee indoors


Outdoor

Signal -30 db

1 watt

I can control

QoS in myown Wi-Fi.

Enough

capacity

in Wi-Fi ?


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QOS GLASS HALF FULL OR HALF EMPTY


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1.000

or 33

Vo


Limited QoSguarantee indoors


Outdoor

Signal -30 db

1 watt

I can control

QoS in my

own Wi-Fi.

Enough

capacity

in Wi-Fi ?802.11ac

1.3 Gbps

Often excess

capacity in a

Wi-Fi network

Home

10 Mbps

SET THE RIGHTEXPECTATIONS

“Mobile voice services

wherever you are

connected to Wi-Fi,

to the capabilities of

that Wi-Fi network”


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BENEFITS OF WI-FI CAWHAT ABOUT QOS FOR WI-FI CAL




AGEN

THE 3GPP AAA FUNCTION IN WI FI CALLI


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THE 3GPP AAA FUNCTION IN WI-FI CALLI

SWx

SWm

HSS 3GPP AAA

ePDG PGW

S6b

ANYWi-Fi

IMSEAP-AKA

User connectsto ANY Wi-Fi

network

1

THE 3GPP AAA FUNCTION IN WI FI CALLI


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THE 3GPP AAA FUNCTION IN WI-FI CALLI

SWx

SWm

HSS 3GPP AAA

ePDG PGW

S6b

ANYWi-Fi

IMSEAP-AKA

User connectsto ANY Wi-Fi

network

1

3GPP AAA authenticates andauthorize user for

Wi-Fi Calling

2

APTILO’S ADDITIONAL “SMARTS”


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APTILO S ADDITIONAL SMARTS

• The Aptilo SMP Wi-Fi Calling solution

provides optional “smarts”: • Additional multiple source look-ups for

service or user related policy decisions.

GTP (S2b)IPSec Tunnel (SWu)

SWx

SWm

HSS

Aptilo SMP Wi-Fi Calling

3GPP AAA

ePDG PG

S6b

D´/Gr`HLR

IMEAP-AKA

Polloo

CRMOther Db

Gx

ANYWi-Fi

non-SIM

Support

Wi-Fi Calling

Policy

Policy

Lookup



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• Support for non-SIM device provisionedby a Wi-Fi Calling application.


SWx

SWm

HSS


3GPP AAA

ePDG PG

S6b

D´/Gr`HLR

IMEAP-AKA

Wi-Fi Calling

Policy

Policy

Lookup

Polloo

CRMOther Db

Gx

ANYWi-Fi

non-SIM

Support



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•

Support for HLR.


SWx

SWm

HSS


3GPP AAA

ePDG PG

S6b

D´/Gr`HLR

IMEAP-AKA

non-SIM

Support

Wi-Fi Calling

Policy

Policy

Lookup

Polloo

CRMOther Db

Gx

ANY

Wi-Fi



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•

Support for HLR.

• User / Device Authentication and

Authorization for Wi-Fi access.


SWx

SWm

HSS


3GPP AAA

ePDG PG

S6b

D´/Gr`HLR

ANY

Wi-Fi

IMEAP-AKA

non-SIM

Support

Wi-Fi Calling

Policy

Policy

Lookup

Polloo

CRMOther Db

Gx

SWa

AccessGateway


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AGEN

TURN-KEY SOLUTIONS


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TURN-KEY SOLUTIONS

VENDOR A

3GPP AAAHSS/HLR

ePDG

VENDOR

3GPP AAA

ePDG

AP AP AP AP

I got somebody to hang if

something goes wrong.

VENDOR LOCK-IN BY TURN-KEY SOLUTIO


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VENDOR A

3GPP AAAHSS/HLR

ePDG

VENDOR

3GPP AAA

ePDG

AP AP AP AP

It will only work

with our own

3GPP AAA.

Our 3GPP

AAA worksbest with our

HSS.

Want to build

Wi-Fi? It’s ok

as long as you

go with us orvendor F.

If you go with

our Wi-Fi and

Gateways, you

will get the AAA

for free!



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VENDOR LOCK IN BY TURN KEY SOLUTIO

VENDOR A

3GPP AAAHSS/HLR

ePDG

VENDOR

3GPP AAA

ePDG

AP AP AP AP

It will only work

with our own

3GPP AAA.

Our 3GPP

AAA worksbest with our

HSS.

Want to build

Wi-Fi? It’s ok

as long as you

go with us orvendor F.

If you go with

our Wi-Fi and

Gateways, you

will get the AAA

for free!

Why are some vendors only pro

standards when they are sitting in

the standardization meetings?

Is there really such athing as a free lunch?

What if my turn-key vendo

terminates a critical produ

How can I get the best

functions to stay competitive?

WHY GO BEST-OF-BREED?


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WHY GO BEST OF BREED?

• Avoid vendor lock-in

• Choose best product

• Avoid supply risks

• Increase competition

ANY Wi-Fi Infrastructure Vendor

AP AP AP AP AP AP AP

ANY Mobile

Core Vendor

ePDG ePDGePDG ePDG

HSS HSS HSS

3GPPAAA

Vendor Agnostic

Vendor

may b

your inve

….what

save jus

rem

WHY GO BEST-OF-BREED?


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WHY GO BEST OF BREED?

• Avoid vendor lock-in

• Choose best product

• Avoid supply risks

• Increase competition

• Aptilo SMP enable best-of-breed

• 100+ deployments with all leadingvendors in more than 70 countries

• Pre-enabled adaptationswith vendor specificattributes (VSA) ANY Wi-Fi Infrastructure Vendor

AP AP AP AP AP AP AP

ANY Mobile

Core Vendor

ePDG ePDGePDG ePDG

HSS HSS HSS

3GPPAAA

Vendor Agnostic

Vendor

may b

your inve

….what

save jus

rem


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AGEN

EPDG TUNNEL SETUP


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• UE attach to Wi-Fi and obtain IP connectivity

• UE selects ePDG based on static IP configuration or DNS

• UE and ePDG perform mutual authentication during IPsec tunnel

establishment using public key certificates

• UE sends encapsulated EAP-AKA messages over IKEv2 to ePDG incl.

user identity (NAI) and potential APN (for IMS)

• ePDG de-capsulates EAP-AKA messages and sends to AAA

for authentication and authorization

• AAA fetch AKA authentication vectors generated by

the HSS (if not available). AAA extract IMSI for the user

• AAA initiates the authentication challenge with

ePDG and UE

• If successful, the AAA initiates the subscriber

profile retrieval with the HSS to check if the user

is authorized for the untrusted access and sends

server registration.

• If successful, the AAA sends the final authentication

answer incl. IMSI and MSK (Master Session Key)

3GPP AAA

SWx

Wi-FiEAP-AKA

Wi-Fi RAN

Untrusted

IPSec (SWu)IPSec

termination

SWm S6b

Aptilo SMPWi-Fi Calling

HSS

ePDG

Circuit

Switched

EPDG TUNNEL SETUP

1

3 4 5

6

7

8

9

2

1

2

3

4

5

6

7

8

9-EAP-AKA or AKA’ required for authentication

-The username part of NAI is based on IMSI

INITIAL ATTACH WITH GTP


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• PGW connection information is returned by the AAA as part of the response to the ePDG. Info on APN-AMBR, static QoS profile ca

• If the UE has provided an APN, the ePDG verifies that it is allowed by the user’s subscription.

If the UE has not provided an APN, the ePDG selects a default APN.

• The ePDG sends a Create Session Request (incl. info on IMSI, APN,RAT type, PDN address, EPS Bearer Identity, Default EPS Bearer QoS,

APN-AMBR, Charging Characteristics) message to the PGW

• The PGW creates a new entry based on the EPS Bearer Identity and

generates a Charging Id. The new entry allows the PGW to route

user plane traffic between the ePDG and the packet data network

and to start charging. If required, the PGW performs authentication

and authorization with the AAA to get access for the given APN.

• The selected PGW informs the AAA on its identity and

the selected S2b protocol variant (here GTP). The AAA

then informs the HSS of the PGW identity and

the associated APN.

• The PGW returns a Create Session Response

message to the ePDG incl. the UE IP address.

• The ePDG is now authenticated by the UE and

ePDG sends IP address to UE.

• IP connectivity is setup and packets are tunneled to and from

UE and PGW through IPSec and GTP. From the PGW to IMS,

normal IP-based routing takes place.

INITIAL ATTACH WITH GTP

10

16

15

14

12

14

17

1

3GPP AAA

SWx

Wi-Fi

EAP-AKA

Wi-Fi RAN

Untrusted

IPSec (SWu)IPSec

termination

SWm S6b


HSS

ePDG

Circuit

Switched

11

10

11

12

13

14

15

16

17 - IMSI is used for user identification

the GTPv2 based S2b interface

&


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No one knows CarrierWi-Fi better than we do

Multitude of Wi-Fi BusinessModels, login & billing option

Best-of-Breed Pre-integratedWi-Fi features

Large-Scale Carrier Wi-Fi

deployments

+100 Carrier Wi-Fi Customersin more than 70 countries

Vast experience withmobile core integration

&

ACRONYMS


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FORBACKUP SLI

ROAMING – 3GPP OPTIONS


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• 3GPP describes two options of roaming for “untrusted” access

•Routed to Home PGW/IMS

• Local Breakout (LBO) to Visited PGW/IMS

• Both options require an ePDG in the visited network

• The 3GPP two options facilitates that full control of the UE location ca

be achieved and international calls can be allowed/denied as a policy

decision by the home operator. Differentiated charging is possible.

3GPP ROAMING SCENARIO: HOME


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ROUTEDSWx

Wi-FiEAP-AKA

Wi-Fi RAN

Untrusted

IPSec(SWu)

IPSec termination

S2b(GTP or PMIPv6)

SGi

SWm

S6b

AAA

ServerHSS

ePDG

Home

IMS CoreVoLTE/VoWiFi

P-GW

Circuit

Switched

Visited network

Home operator

hPCRF

Gx

Gxb

Rx

3GPP ROAMING SCENARIO: LBO


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SWx

Wi-FiEAP-AKA

Wi-Fi RAN

Untrusted

IPSec(SWu)

IPSec termination

S2b(GTP or PMIPv6)

SGi

SWm

S6b

AAA

ServerHSS

Visted


Circuit

SwitchedSWd

Visited network

Home operator

hPCRF

vPCRFAAA

proxy

Gxb

Gx

S9

Rx

P-GW

ePDG

ROAMING: CONTROLLING INT. WI-FI CAL


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• In initial deployments, the UE will connect directly with the home ePDG

without any visited ePDG involved

• For this setup, no native information is available on what Wi-Fi network

which country the roaming UE voice client is connected

• cmp T-Mobile’s international Wi -Fi Calling rates to US numbers

• Two possible solutions to manage the inherent lack of

location info:

• based on the UE source IP address the ePDG could pass on information over using AVP Visited-Network-Identifier to the AAA server. An additional IP regisdatabase look-up (e.g. with ARIN, RIPE, APNIC, etc.) would be required.-> will require ePDG support

•

policy decision to authorize/deny the Wi-Fi Calling service based on UE locatavailable in HSS

ROAMING: CONNECTING TO HOME EPDG


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3GPP AAA

SWx

Wi-FiEAP-AKA

Wi-Fi RAN

Untrusted

IPSec(SWu)

IPSec termination

S2b(GTP or PMIPv6)

SGi

SWm S6b


HSS

ePDG


P-GW

Circuit

Switched

Visited

network

Home

operator

UE/EPDG INITIATED DETACH (S6B)


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Triggers

- UE lost Wi-Fi connection or power off

- IKEv2 tunnel release

HSS/AAA INITIATED DETACH (S6B)


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Triggers:

- Re-authentication timeout

- User’s subscription removed

PGW RESOURCE DEACTIVATION (S6B)


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Trigger

- Handover Wi-Fi – LTE: connections associated with the PDN are released but the PDN I

address is maintained in the PGW as the anchor point

HANDOVER - UNTRUSTED WI-FI TO LTE


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HANDOVER - LTE TO UNTRUSTED WI-FI


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Documents

Wi Fi Calling – Slides