Create Session Request Failure Handling

This section covers the Create Session Request procedure failure scenarios.

When failure occurs during Initial Attach procedure, subscriber context isn’t created,

When another PDN setup fails, PDN isn’t created in subscriber context.

The following table summarizes cnSGW-C behavior during different stages in the call processing for various failure types:

cnSGW-C Behavior for Create Session Request Proceudure Failure Scenarios

Scenarios

Sx Signaling (Revert)

S11 Signaling (Revert)

S5 Signaling

  • Create Session Request advance validation failure

  • Sx Session Establishment Response failure from User Plane (UP)

No

Negative - Create Session Response

No

  • Create Session Response failure

Yes

Delete traffic endpoint for newly created bearers

Negative - Create Session Response

No

  • Sx Modify Response process failure

Yes

Delete traffic endpoint for newly created bearers

Negative - Create Session Response

Delete Session Request to delete newly created session