Question: What action does an eNB take if it receives an INITIAL CONTEXT SETUP REQUEST with a QCI indicating a GBR bearer but without the GBR QoS Information IE?
Option 1: The eNB proceeds with the setup, using default GBR QoS parameters.
Option 2: The eNB considers the establishment of the corresponding E-RAB as failed.
Option 3: The eNB sends a request for additional information to the UE before proceeding.
Option 4: The eNB rejects the procedure with a generic failure message without specifying the cause.
Explanation: If an INITIAL CONTEXT SETUP REQUEST for a GBR bearer lacks the necessary GBR QoS Information, the eNB must consider the setup of that E-RAB as failed. This ensures bearers with specific QoS requirements are properly configured to meet those guarantees, preventing potential service quality issues.