Question: For a User Equipment (UE) camped on a Non-Terrestrial Network (NTN) cell, what condition must be met for the UE to potentially support NTN neighbor cell measurements based on the service start time of the neighbor cell?
Option 1: The UE must support LTE-M (Long Term Evolution for Machines).
Option 2: The serving cell broadcasts the neighbor cell's service start time using a specific RRC (Radio Resource Control) message.
Option 3: The UE supports the feature 'ntn-Connectivity-EPC-r17'.
Option 4: The NTN cell operates exclusively in TDD (Time Division Duplexing) mode.
Explanation: This is because, according to the specifications, the feature of supporting NTN neighbor cell measurements based on the service start time of the neighbor cell is only applicable if the UE supports 'ntn-Connectivity-EPC-r17'. This indicates a specific capability requirement for the UE to utilize this feature, highlighting the importance of understanding the interplay between UE capabilities and network features in telecom networks.