Question: For a User Equipment (UE) operating in Time Division Duplexing (TDD) mode, what is a prerequisite for indicating support for a second CSI subframe set for periodic CSI reporting for dormant serving cells?
Option 1: Support for Carrier Aggregation (CA)
Option 2: Support for dormantSCellState-r15
Option 3: Capability for Enhanced Inter-Cell Interference Coordination (eICIC)
Option 4: Implementation of Massive MIMO (Multiple Input Multiple Output)
Explanation: A UE indicating support for a second CSI subframe set for periodic CSI reporting in dormant serving cells, while operating in TDD mode, must also support dormantSCellState-r15. This ensures coordinated management of dormant cells, optimizing network resource utilization and user experience.