UE Access and Authentication Request Call Flow

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

UE Access and Authentication Request Call Flow
UE Access and Authentication Request Call Flow Description

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.