Section: 4.3.2 Roaming architecture
Content: Figure 4.3.2-1 represents the Roaming architecture with local breakout and Figure 4.3.2-2 represents the Roaming architecture with home-routed traffic for interworking between 5GS and EPC/E-UTRAN. Figure 4.3.2-1: Local breakout roaming architecture for interworking between 5GS and EPC/E-UTRAN NOTE 1: There can be another UPF (not shown in the figure above) between the NG-RAN and the UPF + PGW-U, i.e. the UPF + PGW-U can support N9 towards the additional UPF, if needed. NOTE 2: S9 interface from EPC is not required since no known deployment exists. Figure 4.3.2-2: Home-routed roaming architecture for interworking between 5GS and EPC/E-UTRAN