Section: .2 Delete Bearer Failure Indication
Content: A Delete Bearer Failure Indication shall be sent on the S5/S8 interface by the PGW to the SGW and on the S11 interface by the SGW to the MME as part of failure of eNodeB requested bearer release or MME Initiated Dedicated Bearer Deactivation procedure. The message shall also be sent on the S5/S8 interface by the PGW to the SGW and on the S4 interface by the SGW to the SGSN as part of failure of MS and SGSN Initiated Bearer Deactivation procedure using S4. This message shall be sent back if none of the bearers (not even a single one) included in the Delete Bearer Command message could be deleted. The Cause IE indicates that the EPS bearer has not been deleted in the PGW. When the SGW receives a Delete Bearer Failure Indication message from the PGW with the TEID set to zero in the GTPv2 header and the Cause IE is set to "Context Not Found", which implies that the PDN connection does not exist in the PGW, the SGW may send a Delete Bearer Request message to delete the PDN connection towards the MME/SGSN after sending the Delete Bearer Failure Indication message. Possible Cause values are specified in Table 8.4-1. Message specific cause values are: - "Context not found" Table .2-1: Information Elements in a Delete Bearer Failure Indication Table .2-2: Bearer Context within Delete Bearer Failure Indication Table 7.2.17-3: Overload Control Information within Delete Bearer Failure Indication