Question: In NG-RAN, which measurements can be utilized by multiple peer UEs (e.g., anchor UEs) to determine a target UE's location using the Sidelink Time of Arrival (SL-TOA) positioning method?
Option 1: SL-RSRP only
Option 2: SL-PRS-RSRPP only
Option 3: SL-RTOA, and optionally SL-PRS-RSRP and/or SL-PRS-RSRPP
Option 4: CSI-RS (Channel State Information Reference Signal) measurements
Explanation: The correct answer is Option 3 because the SL-TOA positioning method, as defined in the context of NG-RAN for UE positioning, specifically leverages SL-RTOA (Sidelink Reference Time of Arrival) measurements. Additionally, to enhance accuracy or provide supplementary data, it may also utilize SL-PRS-RSRP (Sidelink Positioning Reference Signal Received Power) and/or SL-PRS-RSRPP (another variant of sidelink positioning reference signal power measurement). This combination allows for more precise location determination of a target UE relative to the positions of multiple peer UEs (such as anchor UEs), highlighting the method's flexibility in utilizing available signal measurements.