Delete Default Bearer Procedure Failure Handling

This section covers the PGW-initiated default bearer deletion procedure failure scenarios.

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

cnSGW-C Behavior for Delete Default Bearer Procedure Failure Scenarios

Scenarios

SGW-service Behavior

Signaling

Output

Delete Bearer Request advance validation failure

Send failure/No signaling over Sx/PGW

Negative - S5 Delete Bearer Response

Session/PDN is not deleted

Sx Session Modify failure

Skip failure and continue

Send S11 Delete Bearer Request towards MME

S5 Delete Bearer Response (Cause = Accepted)

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

Session/PDN is deleted

S11 Delete Bearer Request failure

Skip failure and continue

Send Delete Bearer Response (Cause = Accepted) to PGW

Sx Delete Request (to Delete traffic endpoint)

Session/PDN is deleted

Sx Session Delete Request failure

Skip failure and continue

Send Delete Bearer Response (Cause = Accepted) to PGW

Session/PDN is deleted