Question: In E-UTRAN's Standalone mode for User Equipment (UE) positioning, what additional information is the UE expected to report alongside the vertical component of its position, if available?
Option 1: Cell ID and Serving Cell's Geographic Location
Option 2: An estimate of the location uncertainty and an indication of used positioning method(s)
Option 3: Signal Strength of neighboring cells and UE's velocity
Option 4: Type of positioning method used exclusively (e.g., GPS, A-GPS, etc.)
Explanation: In the context of precise location services in telecom networks, reporting both an estimate of the location uncertainty and the positioning method(s) used is crucial for the network to assess the reliability and potential applications of the provided location fix. This aligns with enhancing the overall efficiency and accuracy of location-based services within E-UTRAN.