Voice Over NR (VoNR Call Flow)

We are seeing 5G Stand Alone (SA) data services are rolling out throughout the world, it is very much essential for MNOs to provide services such as Voice/Video calls. To achieve this, 3GPP standards have defined that the 5G network must provide the Voice services using 5G RAN, 5GC and IMS. 5G radio technology is known as New Radio (NR), and the Voice services using 5G RAN, 5G Core and IMS is referred to as Voice over New Radio-VoNR .

Voice Over NR Network Architecture:

Voice Over NR network Architecture is consist of 5G RAN, 5G Core and IMS network. A high level architecture is shown below. (Only major network functions are included). This network architecture supports Service based interface using HTPP protocol.

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