DDN Handling with Internal DDN Delay Timer Call Flow

This section describes the DDN Handling with Internal DDN Delay Timer call flow.

DDN Handling with Internal DDN Delay Timer Call Flow
DDN Handling with Internal DDN Delay Timer Call Flow Description

Step

Description

1

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

2

UDP-Proxy sends the Sx Session Report Request with DLDR/ERIR (BGIPC Call) to Protocol.

3

Protocol sends the Sx Session Report Request with DLDR/ERIR to SGW-SRV.

4

SGW-SRV sends a Sx Session Report Response to Protocol.

5

Protocol sends the Sx Session Report Request to UDP-Proxy.

6

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

7

SGW-SRV sends the Downlink Data Notification to GTP-S11.

8

GTP-S11 sends the Downlink Data Notification to UDP-Proxy.

9

UDP-Proxy sends the Downlink Data Notification to MME.

10

After MME initaites paging for UE, MME sends the Downlink Data Notification Acknowledgement to UDP-Proxy.

11

UDP-Proxy sends the Downlink Data Notification Acknowledgement to GTP-S11.

12

GTP-S11 sends the Downlink Data Notification Acknowledgement to SGW-SRV.

13

MME sends the Modify Bearer Request for DATA PDN to UDP-Proxy.

14

UDP-Proxy sends the Modify Bearer Request for DATA PDN to GTP-S11.

15

GTP-S11 sends the Modify Bearer Request for DATA PDN to SGW-SRV.

16

SGW-SRV sends the Modify Bearer Request for DATA PDN to Protocol.

17

Protocol and UPF processes the Sx Modify Bearer Request for DATA PDN.

18

Protocol sends Sx Modify Response for DATA PDN to SGW-SRV.

19

SGW-SRV sends Sx Modify Response for DATA PDN to GTP-S11.

20

GTP-S11 sends Sx Modify Response for DATA PDN to UDP-Proxy.

21

UDP-Proxy sends Sx Modify Response for DATA PDN to MME.