Question: For a User Equipment (UE) supporting FDD carrier aggregation with more than two Downlink (DL) component carriers, what is implied about its capabilities regarding multi-cell Hybrid Automatic Repeat Request (HARQ) ACK and periodic Channel State Information (CSI) reporting?
Option 1: The UE must support these features on PUSCH (Physical Uplink Shared Channel) only.
Option 2: Support for these features is optional on both PUCCH (Physical Uplink Control Channel) format 3 and PUSCH.
Option 3: The UE is required to support these features but only for TDD (Time Division Duplexing) carrier aggregation scenarios.
Option 4: The UE supports multi-cell HARQ ACK and periodic CSI reporting, as well as Scheduling Request (SR) on PUCCH format 3.
Explanation: If a UE supports FDD carrier aggregation with more than two DL component carriers (or TDD carrier aggregation), it implies the UE has capabilities for multi-cell HARQ ACK and periodic CSI reporting, along with Scheduling Request (SR) on PUCCH format 3, highlighting its advanced radio access capabilities in handling aggregated carriers efficiently.