Basic and Advance Validation on SGW-Egress (S5) Call Flow

The following section describes the Basic and Advance Validation on SGW-Egress (S5) call flow.

Basic and Advance Validation - S5 Call Flow
Basic and Advance Validation - S5 Call Flow Description

Step

Description

1

The PGW sends the Create Bearer Request to the S5-GTPC-EP pod.

The S5-GTPC-EP pod decodes the Create Bearer Request and performs basic validation.

2

If decoding or basic validation fails, or if SGW-SVC is not available, the S5-GTP-EP pod sends the Create Bearer Response failure message to the PGW.

3

If Create Bearer Request basic validation is successful, the S5-GTP-EP pod forwards the Create Bearer Request to the SGW-SVC pod.

SGW-SVC processes the Create Bearer Request and performs the following:

  • Mandatory IE check

  • Value check

  • Call State check

4, 5

If validation from Step 3 fails:

  • The SGW-SVC sends the Create Bearer Response failure message to the S5-GTP-EP pod.

  • The S5-GTP-EP pod forwards the Create Bearer Response failure message to the PGW.

6, 7

If validation from Step 3 is successful, the SGW-SVC performs the following:

  • Processes Create Bearer Request

  • Performs UP and PGW signaling

  • Sends Create Bearer Response success message to the S5-GTP-EP pod

The S5-GTP-EP pod forwards the Create Bearer Response success message to the PGW.