Aptilo’s vendor agnostic 3GPP AAA in a Wi-Fi Calling solution goes beyond the standards with innovative features that allow you to always have the best-of-breed offering. The result is happy customers and reduced cost.
Below you will learn more about our next-generation Wi-Fi Calling solution and what makes Aptilo’s 3GPP AAA stand out from the crowd. Don’t miss our separate section what is Wi-Fi Calling if you want to better understand the concept of Wi-Fi Calling and what the benefits are for operators and their subscribers. Or to get a full perspective download our Wi-Fi Calling White Paper written by Tefficient.
What is a next-gen Wi-Fi Calling solution?
The next-generation Wi-Fi Calling solution uses devices with a native IMS stack and native VoLTE and VoWiFi applications (Voice over LTE and Voice over Wi-Fi). Connection over any Wi-Fi network is secured using the “untrusted” 3GPP Wi-Fi Access method. Don’t be fooled by the name “untrusted;” the connection is secured end-to-end through an IPSec tunnel between the device and the ePDG in the mobile core. The IPSec connection is automatically triggered anytime the device connects to a Wi-Fi network and has access to the Internet. The device is authenticated for Wi-Fi Calling through a secure SIM Authentication via the 3GPP defined SWm interface.
This brings two benefits to the operator: the connection is highly secure and the user can be reached for Wi-Fi Calling whenever he/she is connected to the Internet. Below we will discuss the Wi-Fi Calling architecture in more detail and Aptilo’s role in it.
The next-generation Wi-Fi Calling solution requires IMS support with VoLTE/VoWiFi. Operators that are using circuit-switched GSM for handling voice can still use the next-generation Wi-Fi Calling solution but there will be no seamless transfer of the calls between Wi-Fi and LTE. The IMS support is still required in this case for the VoWiFi.
Wi-Fi Calling Solution – Device support
The next-generation Wi-Fi Calling solution is supported in all newer smartphones models from leading vendors such as Apple, Samsung, HTC, Motorola and Nokia. Next-generation Wi-Fi Calling requires four things from the device:
- A native IMS stack.
- A native VoWiFi application.
- A native VoLTE application (optional for seamless call transfer).
- Support for SIM Authentication using EAP-AKA.
With this support the voice calls will continue without any interruption as the user moves between the Wi-Fi and LTE networks.