5G access network

- [Instructor] Let's talk about the architecture. … The radio access network architectures, … as we used to call it, … we actually got rid of the R because we think … the access network architecture is more general … when just supporting a specific radio. … And you can see on the right-hand side … on the bottom side some true 5G base stations. … We refer to them as gNB, okay? … So these are the 5G base stations. … They're connected between each other with an Xn interface … and forming essentially the access network … and the gNBs are connected to the 5G core network … which goes up on this slide. … Now on the left-hand side you see some base stations … which still have eNB in the title, … enhanced node b, as we used to call our base stations in 4G. … Now they are not any more called purely eNB, … they're called NG-eNB and the reason is … is because whilst these are 4G base stations … towards the mobile terminal, … they are 5G base stations towards the core network. … So if a base station is able to connect to a 5G core …