Question: In NG-RAN, what does the Sidelink Angle-of-Arrival (SL-AoA) positioning method primarily utilize to determine the direction between a pair of UEs?
Option 1: SL-TDOA (Sidelink Time Difference of Arrival) measurements and SL-PRS-RSRQ (Sidelink Positioning Reference Signal Received Quality)
Option 2: SL-AoD (Sidelink Angle of Departure) measurements from the target UE and SL-PRS-RSRP from peer UEs
Option 3: Round-Trip Time (RTT) measurements between the target UE and multiple anchor UEs
Option 4: SL angle of arrival measurements (and optionally SL-PRS-RSRP and/or SL-PRS-RSRPP) of sidelink signals received at or transmitted by UEs
Explanation: The correct answer highlights the primary utilization of SL-AoA positioning method. This method leverages the angle of arrival measurements of sidelink signals, optionally complemented with signal strength measurements (SL-PRS-RSRP and/or SL-PRS-RSRPP), to determine the direction between UEs, crucial for calculating the target UE's location relative to peer UEs in NG-RAN.