Question: In a Dual Connectivity (DC) scenario, how does the Master eNodeB (MeNB) ensure that the User Equipment Aggregate Maximum Bit Rate (UE-AMBR) is not exceeded?
Option 1: By dynamically adjusting the UE-AMBR based on SeNB's available resources.
Option 2: Solely by limiting the resources it allocates to the UE in the Master Cell Group (MCG).
Option 3: By both limiting the resources allocated to the UE in MCG and indicating a limit to the Secondary eNodeB (SeNB) for its compliance.
Option 4: By ignoring the UE-AMBR for split bearers on both uplink and downlink.
Explanation: In a Dual Connectivity setup, ensuring UE-AMBR compliance requires coordination between the MeNB and SeNB. The correct approach involves two measures: (1) the MeNB limits its own resource allocation to the UE in the Master Cell Group (MCG), directly controlling what it provides; and (2) it communicates a limit to the Secondary eNodeB (SeNB), ensuring that the SeNB also adheres to this cap, thereby collectively preventing the UE-AMBR from being exceeded. This dual-action approach is crucial for managing aggregated bit rates across both nodes in a DC scenario.