LTE: Activate Dedicated EPS Bearer Context Accept

·          The ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT message is sent by the UE to the network to acknowledge the activation of a dedicated EPS bearer context associated with the same PDN address (es) and APN as an already active EPS bearer context

·          Upon receipt of the ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST message, the UE shall stop timer T3396, if it is running for the APN associated with the PDN connection and check the received TFT before taking it into use.

·          The linked EPS Bearer Identity included in the ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST message indicates to the UE to which default bearer, IP address and PDN the dedicated bearer is linked.

·          The UE shall include EPS bearer identity and Procedure transaction identity IEs in the ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT message.

·          The IE Protocol configuration options is included in the message when the UE wishes to transmit (protocol) data (e.g. configuration parameters, error codes or messages/events) to the network

·           Upon receipt of the Activate Dedicated EPS Bearer Context Accept message, the MME shall stop the timer T3485 

Reference 3GPP TS 24.301

Example: ACTIVATE DEDICATED EPS BEARER CONTEXT ACCEPT message