Enhance your voice coverage and get back in control - doing VoWiFi with Radiator

Since Wi-Fi calling (VoWiFi) has been introduced into the market, operators are
increasing their indoor coverage overnight to provide better voice coverage to their subscribers and offer new voice models (both domestic and roaming). With new generation devices and automatic SIM authentication, end-users will never have to consider are they connected to LTE- or WiFi network.

Doing with seamless call transfer support between WiFi and VoLTE provides new opportunities for operators. For years, voice calls have been transmitted over Wi-Fi in the form of OTT applications such as Skype. The problem with OTT applications from an operator’s perspective is that the operator loses control and revenue. With VoWiFi voice calls and messaging work seamlessly for the end-user - and operator retains control.

Benefits for VoWiFi solution

For operator, several benefits are the same as for the end-user - for example better indoor coverage. Additional benefits come from getting the control back for the calls, making OTT players such as skype less important. WiFi is also low-cost solution to enhance voice service coverage and at the same time offload traffic from the core network. After all, VoWiFi is using sharing similar infrastructure as VoLTE.

For end-user, the benefits come from seamless voice and messaging solution between WiFi and LTE networks - provided that their smartphone will support the solution. At the same time WiFi calling will provide better indoor coverage as it will complement LTE network. Also, the operator can offer atttractive solutions that can for example minimise roaming charges when using VoWiFi.

How to do this with Radiator?

Radiator products provide the essential components for VoWifi authentication. Authentication is done with our Radiator SIM Pack that also includes 3GPP AAA Server - providing all the interfaces for 3GPP and non-3GPP authentication. When combined with Radiator Telco Pack Diameter support for policy control and authentication, your network will be ready for Wifi calling. Radiator integrates with all your evolved packet core and WiFi network elements via 3GPP interfaces.


Please contact our team at info(a)open.com.au - we are happy to provide you more information.

Using Radiator for Wi-Fi offloading: how to make savings in mobile packet core network

With Wi-Fi offloading, mobile operators can transfer traffic from their Evolved Packet Core network to Wi-Fi networks. One of the key reasons for this is cost savings - as an example from Radiator customer can demonstrate.Our customer has currently 50,000 public hotspots in their country - the best Wi-Fi coverage in the nation.

Hotspots in the country by operator

In order to get the most out of their Wi-Fi network, a solution was needed for automatic SIM authentication for mobile users. For this, our regional partner implemented a solution with Radiator SIM Pack for the customer. This enabled them to increase the network usage from 1 M usages  per month to over 70 million usages per month. A key component, in addition to Radiator SIM Pack, was iPhone Carrier Bundle with auto connect - that provides automatic authentication to the end-user.

After the initial surge, customer still sees growth of 13 % per month.

The current progress of WiFi Auto Connect usage

Because of the solution, customer is now offloading almost 600 TBytes of data from evolved mobile packet core (EPC) each month - and the amount is still growing. If cost of each GByte to the EPC is around USD $4, the customer is saving over USD $2M per month - and over $24M per year!

Amount of offloaded data by month

Interested in Wi-Fi offloading?

If you have interest in Radiator solutions for Wi-Fi offloading - please do not hesitate to contact our sales team at info@open.com.au