Question: In NG-RAN, which of the following describes a mode where the User Equipment (UE) estimates the Angle of Departure (AoD) using Bluetooth beacons for positioning?
Option 1: UE measures received signals from Bluetooth beacons and calculates AoA.
Option 2: UE transmits a Bluetooth CTE signal to enable beacons to estimate AoA from the UE.
Option 3: UE uses assistance data about Bluetooth beacon's antenna configuration to estimate AoD from the Bluetooth beacons.
Option 4: UE combines Bluetooth measurements with WLAN data to directly estimate AoD.
Explanation: The correct answer is Option 3 because, according to the provided context, the UE estimates AoD by utilizing assistance data regarding the Bluetooth beacon's antenna configuration, which is a specific mode supported by the Bluetooth positioning method in NG-RAN.