Question: What is a key characteristic of Supplementary Uplink (SUL) in relation to the aggregated uplink?
Option 1: The UE can transmit simultaneously on both the supplementary uplink and the uplink of the carrier being supplemented.
Option 2: The UE can only be scheduled to transmit on the supplementary uplink, not on the uplink of the carrier being supplemented.
Option 3: The UE is required to transmit on both the supplementary uplink and the uplink of the carrier being supplemented at all times.
Option 4: The UE may be scheduled to transmit either on the supplementary uplink or on the uplink of the carrier being supplemented, but not on both at the same time.
Explanation: This option correctly highlights a key difference between SUL and aggregated uplink. In SUL, the UE has the flexibility to be scheduled for transmission on either the supplementary uplink or the original uplink of the carrier being supplemented, but it cannot transmit on both simultaneously.