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Extending cellular calls to Wi-Fi devices – a dream come true for smart device users

This blog is by Michael Clever,  Senior Vice President, Core Cluster at Nokia Networks.Twitter: @nokianetworks

Millions of mobile users have multiple devices with Wi-Fi connection capabilities, but so far it has been only possible to make and receive calls with devices which have cellular subscription – in other words, a SIM card. Nokia Networks helps operators better serve the needs of people on the move with the new multi-device service – a dream come true for people who have ever wished they could reuse their phone numbers across different devices and manage their cellular voice calls also with tablets, personal computers or smartwatchs.

The new multi-device feature is readily available for smart device users globally and is compliant with major smartphone platforms. The SIM identity of the smartphone serves as a common identifier for all the devices. The feature allows mobile users to make and receive calls with their smart device of choice, and the calls can be transferred from the cellular network to Wi-Fi and back. The connection is possible even when the smartphone and the other device are not connected to the same Wi-Fi network. This makes life easier for people with multiple Wi-Fi only devices.

Nokia Networks’ complete end-to-end solution makes this feature a reality and easy to deploy in the operator’s network. For operators, a clear benefit is the possibility to further increase subscriber loyalty by offering new, innovative services when launching VoLTE and Voice over Wi-Fi. Our strong pre-verification and service expertise enables shorter device and network interoperability testing times and can speed up time-to-market of this feature.

Nokia Networks’ solution is based on the market-leading IMS/VoLTE solution, and the calling experience is provided by Nokia Open Telecom Application Server (TAS) chosen by more than 30 mobile operators worldwide. The multi-device subscription design utilizes the capabilities of our subscriber data management (SDM) solution. The device activation and subscription management can be automated with Nokia Serve atOnce Device Manager (SADM). Operators will be able to realize the true potential of their IMS network assets, increase service availability and provide voice services even in areas of missing or poor cellular coverage.

Nokia Networks is at the forefront of enabling the human possibilities of this technology. Our innovation in this area relies on open standards while ensuring full interoperability with the latest smart device capabilities. We have developed the multi-device concept in close co-operation with leading operators.

Our solution is built on Nokia Core Network and consists of network element upgrades, new software, and integration services. It enables calls in the operator’s network between smartphones, tablets, personal computers and other Wi-Fi enabled devices without the need to assign distinct phone numbers to all the devices. Nokia Networks is working closely together with its open ecosystem of technology partners whose components are part of this solution.

Read more about VoLTE, Voice over Wi-Fi and network coverage here: Combining Wi-Fi and cellular networks is a key to better coverage.

Please share your thoughts on this topic by replying below – and join the Twitter discussion with @nokianetworks using #VoWiFi #VoLTE #innovation #NetworksPerform #mobilebroadband #WiFi.

Michael Clever

About Michael Clever

Michael is Senior Vice President and Head of Cloud RAN Edge Cloud Platforms, Mobile Networks, Nokia. No matter what the topic – and he’s worked on a lot of them during his 30+ years in the network business – Michael always thinks "customer first." When he’s not driving Nokia’s Cloud RAN Edge Cloud business, you’ll find him outdoors enjoying sports with his family and friends.

Tweet me at @michael_clever 

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