Current Downlink Data Notification Handling Call Flow

This section describes the Current Downlink Data Notification Handling call flow.

Current Downlink Data Notification Handling Call Flow
Current Downlink Data Notification Handling Call Flow Description

Step

Description

1

UPF sends a Sx Session Report Request with DLDR or ERIR to UDP-Proxy.

2

UDP-Proxy sends the Sx Session Report Request with DLDR or ERIR to PFCP.

3

PFCP sends the Sx Session Report Request with DLDR or ERIR to SGW-SRV.

4

The SGW-SRV sends the Downlink Data Notification (DDN) to GTP-S11.

5

SGW-SRV sends Sx Session Report Response to PFCP.

6

PFCP sends the Sx Session Report Response to UDP-Proxy.

7

UDP-Proxy sends the Sx Session Report Response to UPF.

8

GTP-S11 sends the DDN Notification to MME.

9

MME initiates a paging for UE and sends the DDN Acknowledgment to GTP-S11.

10

GTP-S11 sends the DDN Acknowledgment to SGW-SRV.

11

When the paging fails, MME sends the DDN Failure Indication to GTP-S11.

12

GTP-S11 sends the DDN Failure Indication to SGW-SRV.