URR Installation on Initial Attach Call Flow

This section describes URR Installation on Initial Attach call flow.

URR Installation on Initial Attach Call Flow
URR Installation on Initial Attach Call Flow Description

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.