UE Access and Authentication Request Call Flow
The section describes the UE access and Authentication Request procedure call flow.

Step |
Description |
---|---|
1 |
SEAF sends Nausf_UE_Authentication Request to AUSF. AUSF sends Nausf_UE_Authentication_Get Request with SUPI/SUCI and SN name to UDM/ARPF. |
2 |
UDM/ARPF sends Nudm_Authentication_Get response to AUSF. |
3, 4, 5 |
AUSF stores XRES and calculates HRES. It sends Nudm_Authentication_Get response to SEAF. |
6 |
SEAF sends Authentication Response to UE. |
7, 8 |
UE calculates Auth-Rsp and sends Authentcation response to SEAF. |
9, 10 |
SEAF sends HXRES* and sends Nausf_UEAuthentication_Authenticate Request to AUSF. |
11, 12 |
AUSF does RES* verification and sends Nausf_UEAuthentication_Authenticate Response to SEAF. |