OpenAirInterface Access and Mobility Management Function (AMF) Feature Set¶
1. 5GC Service Based Architecture¶
2. OAI AMF Available Interfaces¶
| ID | Interface | Status | Comment |
|---|---|---|---|
| 1 | N1 | ✅ | Communicate with UE via NAS message |
| 2 | N2 | ✅ | Communicate with gNB via NGAP message |
| 3 | N8 | ✅ | Interface to/from UDM (e.g., retrieve UE subscription data) |
| 4 | N11 | ✅ | Interface to/from SMF (e.g., N1N2MessageTransfer, PDU Session Services) |
| 5 | N14 | ❌ | Interface between AMFs |
| 6 | N15 | ❌ | Interface between AMF and PCF |
3. OAI AMF Feature List¶
Based on document 3GPP TS 23.501 V16.0.0 §6.2.1.
| ID | Classification | Status | Comments |
|---|---|---|---|
| 1 | Termination of RAN CP interface (N2) | ✅ | Communicate with gNB via NGAP message |
| 2 | Termination of NAS (N1) | ✅ | Communicate with UE via NAS message |
| 3 | NAS ciphering and integrity protection | ✅ | |
| 4 | Registration management | ✅ | |
| 5 | Connection management | ✅ | |
| 6 | Reachability management | ❌ | |
| 7 | Mobility Management | ✅ | Support N2 Handover |
| 8 | Lawful intercept (for AMF events and interface to LI System) | ❌ | |
| 9 | Provide transport for SM messages between UE and SMF | ✅ | |
| 10 | Transparent proxy for routing SM messages | ❌ | |
| 11 | Access Authentication | ✅ | |
| 12 | Access Authorization | ✅ | |
| 13 | Provide transport for SMS messages between UE and SMSF | ❌ | |
| 14 | Security Anchor Functionality (SEAF) | ✅ | |
| 15 | Location Services management for regulatory services | ❌ | |
| 16 | Provide transport for Location Services messages between UE and LMF as well as between RAN and LMF | ✅ | |
| 17 | EPS Bearer ID allocation for interworking with EPS | ❌ | |
| 18 | UE mobility event notification | ✅ | |
| 19 | Support for Control Plane CIoT 5GS Optimisation | ❌ | |
| 20 | Provisioning of external parameters | ❌ | |
| 21 | Support non-3GPP access networks | ❌ |