AMF-MME (N26_Idle) Scenario Call Flow

This section describes the AMF-MME (N26_Idle) Scenario call flow.

AMF-MME (N26_Idle) Scenario Scenario Call Flow
AMF-MME (N26_Idle) Scenario Call Flow Description

Step

Description

1

The UE starts a registration procedure.

2

The UE sends a Registration Request to the NGRAN.

3

The NGRAN performs the AMF selection.

4

The NGRAN forwards the Registration Request to the AMF.

5a

The AMF sends the Context Request to the MME.

5b

The MME sends the Context Response to the AMF.

6

The AMF sends the Context Acknowledgment to the MME.

7

From the Context Acknowledgment message onwards, the call flow is the same as Idle Mode Registration to AMF from MME Call Flow except for UDM, PCF, and AUSF. For further information, see Idle Mode Registration to AMF from MME Call Flow in the chapter Internode Registration Support in this document.

8

The HSS+UDM sends the Cancel Location Request to the MME.

9

The MME sends the Cancel Location acknowledgment to the HSS+UDM.

10

The UE sends the Registration Accept message to the AMF.

11

The AMF sends the Registration Complete message to the UE.