Hi Ignacio,

Welcome to the mailing list!

VoWiFi is a pretty complex setup. You will need an IMS core, and Project 
Clearwater is a good choice for that. However, you will need quite a few other 
pieces to make it work, beyond just an EPC. I think you will need:

·         ePDG

·         P-GW

·         P-CSCF with support for IMS AKA

·         PCRF

·         AAA Authentication server to authenticate your handsets on the WiFi 
network.

I’ve talked to some of my colleagues, and we aren’t aware of any open source 
providers of these components. If you find any, we’re definitely interested.

Good luck – we’d love to hear if you get this working, or hit any issues with 
Project Clearwater.

Yours,

Chris

From: Clearwater [mailto:[email protected]] On 
Behalf Of Ignacio Verona
Sent: 25 May 2016 11:27
To: [email protected]
Subject: [Project Clearwater] Native WiFi calling

Hi all,

this is my first message to the list, so hello everyone! I work on the NFV/SDN 
area as a solution architect. My experience is mainly on the fixed services, so 
I'm familiar but not an expert on IMS and EPC technologies.

My question is the following:

After Apple introducing native Wifi Calling support on the latest iOS releases 
I was wondering if it might be possible to create a test environment using 
Clear Water. My main question is on the access side: For wifi calling, the UE 
discovers the ePDG by DNS, and uses it to setup an IPSec tunnel. So, a full EPC 
is required to test wifi calling? As far as I understand it is, because the PDG 
is the only node able to start the tunnel, both from the UE to itself and the 
GTP one to the PGW. If so, do you know of any suitable open source EPC 
implementation that could be used?

Does anyone have any experiences on this?

thanks a lot in advance,
Ignacio.
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