Hi all,
While researching for Open Source IMS Services I’v found the presentation “What’s up with IMS & VoLTE?” at KamailioWorld 2018.
There is a quote that raises a question:
“Things, you shouldn’t expect (at least initially):
● Seamless handover between LTE and Wifi, as this requires some integration with the PGW of the LTE”
My question is: Has the VoLTE <-> VoWiFi Handover been implemented in the meantime?
BR Christian
Hi,
The handover between VoWifi and VoLTE is fairly simple, as it has little to do with IMS. Technically speaking, the data session is migrated from the PGW (LTE) to the ePDG (Wifi), using GTP on the S2b interface. The device keeps it's IP address and the the handover is fully transparent to the IMS and related systems. If someone is at MWC in a little more than a week and wants to chat, drop me a message.
Thanks, Carsten
Christian Hahn via sr-users sr-users@lists.kamailio.org schrieb am Do., 15. Feb. 2024, 09:41:
Hi all,
While researching for Open Source IMS Services I’v found the presentation “What’s up with IMS & VoLTE?” at KamailioWorld 2018.
There is a quote that raises a question:
“Things, you shouldn’t expect (at least initially):
● Seamless handover between LTE and Wifi, as this requires some integration with the PGW of the LTE”
My question is: Has the VoLTE <-> VoWiFi Handover been implemented in the meantime?
BR Christian __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
Hi Carsten,
thank you very much for your fast reply!
Good to know that from IMS point of view it is fairly simple, but as far as I know it is more complex for MME, PGW and ePDG. May you know any Open Source Mobile Core which is supporting VoLTE <-> VoWiFi HO with Kamailio?
Unfortunately, I am not at MWC, but I wishing you a productive time and interesting conversations!
BR Christian
Am Do., 15. Feb. 2024 um 10:33 Uhr schrieb Carsten Bock carsten@bock.info:
Hi,
The handover between VoWifi and VoLTE is fairly simple, as it has little to do with IMS. Technically speaking, the data session is migrated from the PGW (LTE) to the ePDG (Wifi), using GTP on the S2b interface. The device keeps it's IP address and the the handover is fully transparent to the IMS and related systems. If someone is at MWC in a little more than a week and wants to chat, drop me a message.
Thanks, Carsten
Christian Hahn via sr-users sr-users@lists.kamailio.org schrieb am Do., 15. Feb. 2024, 09:41:
Hi all,
While researching for Open Source IMS Services I’v found the presentation “What’s up with IMS & VoLTE?” at KamailioWorld 2018.
There is a quote that raises a question:
“Things, you shouldn’t expect (at least initially):
● Seamless handover between LTE and Wifi, as this requires some integration with the PGW of the LTE”
My question is: Has the VoLTE <-> VoWiFi Handover been implemented in the meantime?
BR Christian __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
Hi,
check out open5gs as MME or PGW. Regarding ePDG, there is activity in the osmocom Project, maybe you can put these two projects together: https://osmocom.org/projects/osmo-epdg, Otherwise there are references in strongswan for ePDG, but i did not hat the time to play around.,
Markus
On Thu, Feb 15, 2024 at 2:26 PM Christian Hahn via sr-users < sr-users@lists.kamailio.org> wrote:
Hi Carsten,
thank you very much for your fast reply!
Good to know that from IMS point of view it is fairly simple, but as far as I know it is more complex for MME, PGW and ePDG. May you know any Open Source Mobile Core which is supporting VoLTE <-> VoWiFi HO with Kamailio?
Unfortunately, I am not at MWC, but I wishing you a productive time and interesting conversations!
BR Christian
Am Do., 15. Feb. 2024 um 10:33 Uhr schrieb Carsten Bock <carsten@bock.info
:
Hi,
The handover between VoWifi and VoLTE is fairly simple, as it has little to do with IMS. Technically speaking, the data session is migrated from the PGW (LTE) to the ePDG (Wifi), using GTP on the S2b interface. The device keeps it's IP address and the the handover is fully transparent to the IMS and related systems. If someone is at MWC in a little more than a week and wants to chat, drop me a message.
Thanks, Carsten
Christian Hahn via sr-users sr-users@lists.kamailio.org schrieb am Do., 15. Feb. 2024, 09:41:
Hi all,
While researching for Open Source IMS Services I’v found the presentation “What’s up with IMS & VoLTE?” at KamailioWorld 2018.
There is a quote that raises a question:
“Things, you shouldn’t expect (at least initially):
● Seamless handover between LTE and Wifi, as this requires some integration with the PGW of the LTE”
My question is: Has the VoLTE <-> VoWiFi Handover been implemented in the meantime?
BR Christian __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
-
Carsten Bock -
Christian Hahn -
Markus Monka