Standards Compliance
The SMF is one of the control plane (CP) NFs of the 5G core network. The SMF uses different interfaces to communicate with the other NFs or nodes. For example, the N4 interface exists between the SMF and User Plane Function (UPF). Each of the SMF interfaces comply to a specific version of the 3GPP specification depending on the compliance version supported.
Use the following table to determine the compliance mapping of each SMF interface and the 3GPP Standards specification versions.
Interface | Relationship | 3GPP Specification | Version |
---|---|---|---|
N11 |
Between AMF and SMF |
29.518 29.502 |
For December 2018 Compliance Support: 15.2.0 For June 2019 Compliance Support: 15.4.0 |
N7 |
Between PCF and SMF |
29.512 |
For December 2018 Compliance Support: 15.2.0 For June 2019 Compliance Support: 15.4.0 |
N4 |
Between UPF and SMF |
29.244 |
For December 2018 Compliance Support: 15.2.0 For June 2019 Compliance Support: 15.4.0 |
Nnrf |
Between NRF and SMF |
29.510 |
For December 2018 Compliance Support: 15.0.0 For June 2019 Compliance Support: 15.4.0 |
N10 |
Between UDM and SMF |
29.503 |
For December 2018 Compliance Support: 15.2.1 For June 2019 Compliance Support: 15.4.0 |
N40 |
Between SMF and CHF |
32.291 |
For December 2018 Compliance Support: 15.1.0 For June 2019 Compliance Support: 15.3.0 |
N1 |
Between UE and AMF |
24.501 |
For December 2018 Compliance Support: 15.2.0 For June 2019 Compliance Support: 15.4.0 |
N2/NGAP |
Between RAN and AMF |
38.413 |
For December 2018 Compliance Support: 15.2.0 For June 2019 Compliance Support:15.4.0 |