Section: 6.1.4 Protocol stacks of IAB
Content: Figure 6.1.4-1 shows the protocol stack for F1-U between IAB-DU and the IAB-donor-CU-UP, and Figure 6.1.4-2 shows the protocol stack for F1-C between IAB-DU and the IAB-donor-CU-CP. In these example figures, F1-U and F1-C traffic are carried over two backhaul hops. NOTE: F1 needs to be security-protected as described in TS 33.501[ Security architecture and procedures for 5G System ] . The security layer is not shown in the Figure 6.1.4-1, Figure 6.1.4-2 and Figure 6.1.4-3. Figure 6.1.4-1: Protocol stack for F1-U of IAB Figure. 6.1.4-2: Protocol stack for F1-C of IAB Figure 6.1.4-3 shows the protocol stack for F1-C between IAB-DU and the IAB-donor-CU-CP, when the F1-C traffic is exchanged via the MeNB. Fig. 6.1.4-3: Protocol stack for IAB F1-C traffic exchanged via the MeNB Figure 6.1.4-4 shows the protocol stack for F1-C between IAB-DU and the IAB-donor-CU-CP, when the F1-C traffic is exchanged via the MgNB. Fig. 6.1.4-4: Protocol stack for IAB F1-C traffic exchanged via the MgNB Figure 6.1.4-5 shows the protocol stack for F1-C between IAB-DU and the IAB-donor-CU-CP, when the F1-C traffic is exchanged via the SgNB. Fig. 6.1.4-5: Protocol stack for IAB F1-C traffic exchanged via the SgNB