Section: .2 Modify Bearer Failure Indication
Content: The Modify 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 HSS Initiated Subscribed QoS Modification procedure, or when the SQCI flag or the PSCI flag is set to the Context Response message. It 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 HSS Initiated subscribed QoS modification, or when the SQCI flag or the PSCI flag is set to the Context Response message. It shall also be sent on the S2a/S2b interface by the PGW to the TWAN/ePDG as part of failure of HSS Initiated Subscribed QoS Modification procedure. Cause IE indicates that an EPS bearer has not been updated in the PGW. Possible Cause values are specified in Table 8.4-1. Message specific cause values are: - "Context not found" - "Service denied". Table .2-1: Information Elements in a Modify Bearer Failure Indication Table 7.2.14-2: Overload Control Information within Modify Bearer Failure Indication