How does 5G call flow?

5G Data call establishes virtual circuits between calling and called party for data transmission and reception over 5G network . There are two types of Data calls viz. Mobile Originating packet switched call and Mobile Terminating packet switched call.

5G NR (New Radio) is a new radio access technology (RAT) developed by 3GPP for the 5G (fifth generation) mobile network. It was designed to be the global standard for the air interface of 5G networks. … The study of NR within 3GPP started in 2015, and the first specification was made available by the end of 2017.

In a 5G network, the function of the HSS is split into the authentication server function (AUSF), the UDM, and the UDR (when it is a stateless architecture). The AUSF authenticates servers and provides encryption keys. The UDM stores and manages the data.