· After receiving the ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message, the UE shall stop timer T3396 if it is running for the APN indicated in the message and send an ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT message.
· The UE should check the Procedure transaction identity (PTI) in the ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST message to identify the UE requested PDN connectivity procedure to which this default bearer context activation is related.
· When the default bearer is activated as part of the attach procedure, the UE shall send the ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT message together with ATTACH COMPLETE message.
· When the default bearer is activated in response to the stand-alone PDN CONNECTIVITY REQUEST message, the UE shall send the ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT message alone.
· The UE shall include EPS bearer identity and Procedure transaction identity IEs in the ACTIVATE DEFAULT 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 DEFAULT EPS BEARER CONTEXT ACCEPT message, the MME shall stop the timer T3485, if the timer is running
Reference 3GPP TS 24.301
Example: ACTIVATE DEFAULT EPS BEARER CONTEXT ACCEPT with Attach Complete message
Activate Default EPS Bearer Context" is a term used in mobile telecommunications, particularly in LTE (Long-Term Evolution) networks. How Audio Fix It refers to the process of establishing a default Evolved Packet System (EPS).
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