name: F1-C
full_form: F1 Control plane interface
context: 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. 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
description: The F1 Control plane interface (F1-C) is a communication pathway between Network Functions, specifically used in the context of Integrated Access and Backhaul (IAB) to carry control plane traffic.
explanation: The text explicitly states that F1-C is an "interface" used for carrying control plane traffic. This aligns with the definition of an interface as a point of connection or communication between different systems or components.
section_title: 6.1.4Protocol stacks of IAB
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