Section: 7.2.22 Release Access Bearers Response
Content: The Release Access Bearers Response message is sent on the S11 interface by the SGW to the MME as part of the S1 release procedure and eNodeB initiated Connection Suspend procedure. It may also be sent on the S11 interface by the SGW to the MME as part of the Establishment of S1-U bearer during Data Transport in Control Plane CIoT EPS optimisation procedure (see clause 5.3.4B.4 of 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [3]). NOTE: The S1 release procedure is also used to release S11-U bearers for the Control Plane CIoT EPS optimisation, except in the case of data buffering in the MME. The message shall also be sent on the S4 interface by the SGW to the SGSN as part of the procedures: - RAB release using S4 - Iu Release using S4 - READY to STANDBY transition within the network Possible Cause values are specified in Table 8.4-1. Message specific cause values are: - "Request accepted". - "Request accepted partially". - "Context not found". Table 7.2.22-1: Information Element in Release Access Bearers Response Table 7.2.22-2: Load Control Information within Release Access Bearers Response Table 7.2.22-3: Overload Control Information within Release Access Bearers Response