Question: In NG-RAN, which measurement(s) can be utilized by multiple peer UEs to determine a target UE's location using the Sidelink Time of Arrival (SL-TOA) positioning method?
Option 1: SL-PRS-RSRP only
Option 2: SL-RTOA (and optionally SL-PRS-RSRP and/or SL-PRS-RSRPP)
Option 3: Handover-related Reference Signal Received Power (RSRP)
Option 4: Downlink Channel Measurement for RRM
Explanation: The correct answer is Option 2 because, according to the principles of SL-TOA positioning in NG-RAN, the method leverages SL-RTOA measurements as a primary component. Additionally, it may optionally incorporate SL-PRS-RSRP and/or SL-PRS-RSRPP measurements from sidelink signals received by multiple peer UEs (like anchor UEs) to accurately determine the target UE's location relative to these peers. This approach enhances positioning accuracy by utilizing both time of arrival and signal strength metrics when available.