Question: What characterizes an EPS bearer/E-RAB as a GBR (Guaranteed Bit Rate) bearer in the E-UTRAN?
Option 1: Dedicated network resources are permanently allocated with a Guaranteed Bit Rate (GBR) value at bearer establishment/modification.
Option 2: It is established by the UE's request for high-priority traffic.
Option 3: It is always assigned to the default bearer for a PDN connection.
Option 4: It operates without any queue management policy.
Explanation: An EPS bearer/E-RAB is classified as a GBR (Guaranteed Bit Rate) bearer when dedicated network resources, associated with a Guaranteed Bit Rate value, are permanently allocated at the time of bearer establishment or modification. This allocation ensures a guaranteed bit rate for the bearer, distinguishing it from Non-GBR bearers which do not have such guarantees. This is crucial for applications requiring consistent and predictable throughput in telecom networks.