URR Removal and CDR Reporting on Detach Call Flow
This section describes URR Removal and CDR Reporting on Detach call flow.

Step |
Description |
---|---|
1 |
A PDN session is established and URR is enabled for Sx session. The MME sends the Delete Session Request to the GTPC-EP. |
2 |
The GTPC-EP forwards the S11 Delete Bearer Request to the SGW-service pod. |
3 |
The SGW-service pod sends the Sx Session Modification Request to the PFCP proto. |
4 |
The PFCP proto sends the Sx Session Modification Response to the SGW-service pod with the cause as Request-Accepted. |
5 |
The SGW-service pod sends the S5 Delete Session Request to the GTPC-EP. |
6 |
The GTPC-EP sends the Delete Session Request to the PGW. |
7 |
The PGW sends the Delete Session Response to the GTPC-EP with the cause as Request-Accepted. |
8 |
The GTPC-EP sends the S5 Delete Session Response to the SGW-service pod with the cause as Request-Accepted. |
9 |
The SGW-service pod sends the Sx Session Delete Request to the PFCP proto. |
10 |
The SGW-service pod receives the Sx Session Delete Response from the PFCP proto with the cause as Request-Accepted. |
11 |
The SGW-service pod triggers the CDR generation. |
12 |
The SGW-service pod sends the CDR request to the GTPP-EP. |
13 |
The SGW-service pod sends the Delete Session Response to the GTPC-EP with the cause as Request-Accepted. |
14 |
The GTPC-EP pod forwards the Delete Session Response to the MME with the cause as Request-Accepted. |
15 |
The GTPP-EP sends the CDR ACK to the SGW-service pod. |