URR Installation on Initial Attach Call Flow
This section describes URR Installation on Initial Attach call flow.

Step |
Description |
---|---|
1 |
The MME sends the Create Session Request to the GTPC-EP. |
2 |
The GTPC-EP forwards the Create Session Request to the SGW-service pod. |
3 |
The SGW-service pod sends the Sx Session Establishment Request to the PFCP proto |
4 |
The PFCP proto sends the Sx Session Establishment Response to the SGW-service with the cause as Request-Accepted. |
5 |
The SGW-service pod sends the S5 Create Session Request to the GTPC-EP. |
6 |
The GTPC-EP sends the S5 Create Session Request to the PGW. |
7 |
The PGW sends the Create Session Response to the GTPC-EP with the cause as Request-Accepted. |
8 |
The GTPC-EP sends the S5 Create Session Response to the SGW-service with the cause as Request-Accepted. |
9 |
The SGW-service pod sends the Sx Session Modification Request to the PFCP proto. |
10 |
The SGW-service pod receives the Sx Session Modification Response from the PFCP proto with the cause as Request-Accepted. |
11 |
The SGW-service pod sends the S5 Create Session Response to the GTPC-EP with the cause as Request-Accepted. |
12 |
The GTPC-EP forwards the S5 Create Session Response to the MME with the cause as Request-Accepted. |