Delete Session Procedure Failure Handling

This section covers the MME-initiated Deletion Session procedure failure scenarios.

The following table represents cnSGW-C behavior for the failure scenarios:

cnSGW-C Behavior for Delete Session Procedure Failure Scenarios

Scenarios

SGW-service Behavior

Signaling

Output

Delete Session Request advance validation failure

Send failure/No signaling over Sx/MME

Negative - S11 Delete Session Response

Session/PDN is not deleted

Sx Session Modify Request failure

Skip failure and continue

Send Delete Session Request towards PGW

Send Delete Session Response (Cause = Accepted) to MME

Sx Delete Request (to Delete traffic endpoint) depends upon Sx Session Modify Response

Session/PDN is deleted

S5 Delete Session Request failure

Skip failure and continue

Send Delete Session Response (Cause = Accepted) to MME

Sx Delete Request (to Delete traffic endpoint)

Session/PDN is deleted

Sx Session Delete Request failure

Skip failure and continue

Send Delete Session Response (Cause = Accepted) to MME

Session/PDN is deleted