Question: For a User Equipment (UE) that supports WLAN measurements, what is the requirement regarding reporting of an extended number of measurements of WLAN IDs, as per E-UTRA specifications?
Option 1: It is optional for UEs to report an extended number of WLAN ID measurements if they support WLAN measurements.
Option 2: Reporting of an extended number of WLAN ID measurements is mandatory only for UEs that do not support WLAN measurements.
Option 3: It is mandatory for UEs that support WLAN measurements to report an extended number of measurements of WLAN IDs.
Option 4: The requirement depends on the specific RRC protocol version implemented by the UE.
Explanation: This correct answer reflects the necessity for UEs capable of WLAN measurements to also support the reporting of a broader set of WLAN ID measurements. This ensures comprehensive network visibility and efficient resource management, particularly in heterogeneous network environments where both cellular (E-UTRA) and non-cellular (WLAN) technologies coexist. Mandatory support in such UEs aligns with the goal of enhanced network performance and user experience.