Section: 6.5.2.3 UE requested PDN disconnection procedure accepted by the network
Content: Upon receipt of the PDN DISCONNECT REQUEST message, if it is accepted by the network, the MME shall initiate the bearer context deactivation procedure by sending the DEACTIVATE EPS BEARER CONTEXT REQUEST message including the linked EPS bearer identity of the default bearer associated with the PDN to disconnect from and the PTI. The behaviour of the MME is described in clause 6.4.4. Upon receipt of the DEACTIVATE EPS BEARER CONTEXT REQUEST message with a PTI which matches the value used for the PDN DISCONNECT REQUEST message, the UE shall stop the timer T3492 and enter the state PROCEDURE TRANSACTION INACTIVE. The behaviour of the UE is described in clause 6.4.4. The UE should ensure that the procedure transaction identity (PTI) assigned to this procedure is not released immediately. The way to achieve this is implementation dependent. While the PTI value is not released, the UE regards any received DEACTIVATE EPS BEARER CONTEXT REQUEST message with the same PTI value as a network retransmission (see clause 7.3.1). On reception of DEACTIVATE EPS BEARER CONTEXT ACCEPT message from the UE, the MME releases all the resources reserved for the PDN in the network.