Call Flows
This section describes the key call flows for this feature.

Step |
Description |
---|---|
1 |
The MME sends the Delete Session Request to the S11-GTP-EP. |
2 |
The S11-GTP-EP routes this message with TEID value to the Service-POD (SGW) which handles this session. |
3 |
The Service-POD (SGW) sends the Sx Modification Request to PFCP-EP. |
4 |
The PFCP-EP sends the Sx Modification Confirmation to the Service-POD (SGW). |
5 |
The Service-POD (SGW) sends the Delete Session Request to the PGW through the S5-SGW-EGRESS-GTP-EP. |
6 |
The Service-POD (SGW) receives the Delete Session Request from the PGW through the S5-SGW-EGRESS-GTP-EP. |
7 |
The Service-POD (SGW) sends the Sx Delete Request to PFCP-EP. |
8 |
The Service-POD (SGW) receives the Sx Delete Confirmation from PFCP-EP. |
9 |
The Service-POD (SGW) sends Release TEID in ID-MGR to Node-Mgr. |
10 |
The Service-POD (SGW) receives the Release TEID Confirmation from the Node-Mgr. |
11 |
The Service-POD (SGW) sends the Delete Session Response to S11-GTP-EP. |
12 |
The S11-GTP-EP sends the Delete Session Response to the MME. |
13 |
The Service-POD (SGW) sends the Session Update or Delete in database message to the CDL. |

Step |
Description |
---|---|
1 |
The PGW/SMF sends the Delete Bearer Request to the S5-SGW-EGRESS-GTP-EP. |
2 |
The S5-SGW-EGRESS-GTP-EP performs routing of this message with TEID value to the same pod that has hosted this session. The S5-SGW-EGRESS-GTP-EP sends the Delete Bearer Request to the Service-POD (SGW). |
3 |
The Service-POD (SGW) sends the Sx Modification Request to PFCP-EP and receives Sx Mod Cnf from it. |
4 |
The PFCP-EP sends the Sx Modification Confirmation to the Service-POD (SGW). |
5 |
The Service-POD (SGW) sends the Delete Bearer Request to the MME through the S11-GTP-EP. |
6 |
The S11-GTP-EP forwards the Delete Bearer Request to the MME. |
7 |
The MME sends the Delete Bearer Response to the S11-GTP-EP. |
8 |
The S11-GTP-EP forwards the Delete Bearer Response to the Service-POD (SGW). |
9 |
The Service-POD (SGW) sends the Sx Delete Request to the PFCP-EP. |
10 |
The Service-POD (SGW) receives the Sx Delete Confirmation from the PFCP-EP. |
11 |
The Service-POD (SGW) sends the Release TEID in ID-MGR to the Node-Mgr. |
12 |
The Service-POD (SGW) receives the Release TEID Confirmation from the Node-Mgr. |
13 |
The S11-GTP-EP sends the Delete Bearer Response to the PGW through S5-SGW-EGRESS-GTP-EP. |
14 |
The S5-SGW-EGRESS-GTP-EP sends the Delete Bearer Response to the PGW/SMF. |
15 |
The Service-POD (SGW) sends the Session Update or Delete in database message to the CDL. |