Question: For a User Equipment (UE) to support measurements at velocities up to 500km/h in a High-Speed Train Scenario with Single Frequency Network (HST-SFN), what additional capability must the UE also support, as per E-UTRA specifications?
Option 1: Inter-RAT Handover Capability
Option 2: measurementEnhancements-r14
Option 3: Enhanced Cell ID (ECID) Locationing
Option 4: Carrier Aggregation (CA) for multiple bands
Explanation: To ensure seamless and accurate measurements at high velocities in HST-SFN scenarios, a UE must support not only specific enhancements for such conditions but also foundational measurement enhancements. Supporting measurementEnhancements-r14 is crucial for backward compatibility and a robust measurement framework, serving as a prerequisite for more advanced enhancements.