Question: In accordance with radio resource management requirements, what is the condition for a UE's reported CQI during the time period T3 after SCell activation?
Option 1: The UE reports a zero CQI index for both PSCell and SCell.
Option 2: The UE reports a valid CQI only for the PSCell.
Option 3: The UE may report either a valid or an invalid CQI for both PSCell and SCell.
Option 4: The UE shall report a valid CQI for both PSCell and SCell, with non-zero CQI index for the SCell.
Explanation: This is correct because during T3 after SCell activation, the UE must report a valid Channel Quality Indicator (CQI) for both the Primary Serving Cell (PSCell) and the Secondary Serving Cell (SCell), ensuring the SCell's CQI index is non-zero. This ensures the network receives accurate quality feedback for resource management, crucial in wireless communications, especially in 5G NR deployments where dynamic resource allocation is key.