Question: What is the primary purpose of the UE requested bearer resource allocation procedure in EPS?
Option 1: To release existing bearer resources for a traffic flow aggregate.
Option 2: To modify an existing QoS demand (QCI) for a dedicated EPS bearer context.
Option 3: To establish a new PDN connection for emergency bearer services.
Option 4: To request an allocation of bearer resources for a traffic flow aggregate with specific QoS demand (QCI).
Explanation: The UE requested bearer resource allocation procedure is used by the UE to request bearer resources for a traffic flow aggregate, specifying the required QoS demand (QCI) and optionally sending a GBR requirement. This matches option 4, which correctly describes the primary purpose of this procedure.