IPv6 on VoLTE

Yury Shefer shefys at gmail.com
Fri Nov 9 04:05:33 CET 2018

IMS 3GPP specification requires SIP integrity and confidentiality. You
may see IPsec/IPsec security association on the device when it is
communicating and/or registered with P-CSCF (uses SIP protocol). With
VoWiFi IPsec is used to establish a tunnel between UE (user
equipment/phone) and mobile network operator packet core (EPDG node).
So they're two different use cases.

More info:
[0] https://en.wikipedia.org/wiki/IMS_security#IMS_Access_Security_for_SIP
[1] 3G Security: 3GPP TS 33.203 - https://www.3gpp.org/DynaReport/33203.htm
[2] Access to the 3GPP Evolved Packet Core (EPC) via non-3GPP access
networks (VoWiFi) / 3GPP TS24.302- www.3gpp.org/dynareport/24302.htm
On Thu, Nov 8, 2018 at 2:15 AM Tarko Tikan <tarko at lanparty.ee> wrote:
> hey,
> > This might be confusing VoLTE with VoWiFI.  The latter will use IPSEC.
> Correct. What probably happened is that together with activating VoLTE,
> VoWIFI was also activated on the device. Makes sense as VoLTE users are
> typically moved to IMS environment.
> --
> tarko


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