VoLTE and Wi-Fi Calling

VoIP enabling new services over fixed, cellular, and Wi-Fi networks:

voice-over-Long Term Evolution (VoLTE)
Wi-Fi calling – see for example: http://www.aptilo.com/ Links to an external site.
Rich Communications Services (RCS) – IMS services for “enhanced” messages, multimedia calls, …

See for example: TeleGeography, ‘Telenor Sweden deploying Ericsson IMS network to enable VoLTE, Wi-Fi calling’, 11-Aug-2015, https://www.telegeography.com/products/commsupdate/articles/2015/08/11/telenor-sweden-deploying-ericsson-ims-network-to-enable-volte-wi-fi-calling/index.html Links to an external site.

Slide Notes

TeleGeography, ‘Telenor Sweden deploying Ericsson IMS network to enable VoLTE, Wi-Fi calling’, 11-Aug-2015. [Online]. Available: https://www.telegeography.com/products/commsupdate/articles/2015/08/11/telenor-sweden-deploying-ericsson-ims-network-to-enable-volte-wi-fi-calling/index.html Links to an external site. . [Accessed: 15-Aug-2015]

Transcript

[slide548] Today, VoLTE, Voice over LTE, and Wi-Fi calling are exploding enormously. Here in Sweden, some of you may have seen companies like Aptillo. They're one of the major people helping operators to provide Wi-Fi calling services. There's a big battle over, should we do Voice over LTE? Or should we do a fallback to an earlier 3G VoIP system? Why is this such a big issue? Well, because in LTE, we got completely rid in our core network of all circuit-switched networks. It's all only packet-switched. So that radically changes things. It turns out that because to get high data rates in LTE, we need long frames, but we saw that the data in a voice audio frame was very small. So the overhead sending it over LTE by itself is incredibly high. So an interesting thesis looked at saying, well, what do I do? I take my VoIP traffic and I take my bulk data traffic and I combine them together into a frame and I ship that off. So now I reduce my overhead on my VoIP tremendously. So a very, very interesting approach. Mixing the traffic before you send it already in the device, and then at the remote end, splitting it. The voice traffic goes off its way, the other traffic goes off its own way. Telenor Sweden using Ericsson's IMS network already in 2015.