5GC点对点接口 | 网络功能关系 | 协议 |
| N1 | UE-AMF | 5G NAS |
| N2 | gNodeB-AMF | MGAP |
| N3 | gNodeB-UPF | GTP-U(GTPv1) |
| N4 | SMP-UPF | PFCP(CUPS) |
| N5 | PCF-AF | http2 |
| N6 | UPF-DN | 纯IP协议，如https |
| N7 | SMF-PCF | http2 |
| N8 | AMF-UDM | http2 |
| N9 | UPF-UPF | GTP-U(GTPv1) |
| N10 | SMF-UDM | http2 |
| N11 | AMF-SMF | http2 |
| N12 | AMF-AUSF | http2 |
| N13 | AUSF-UDM | http2 |
| N14 | AMF-AMF | http2 |
| N15 | AMF-PCF | http2 |
| N16 | SMF-SMF | http2 |
| N26 | MME-AMF | GTPv2 |
| N33 | API-AF | http2 |
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