Question: In SL-TDOA positioning, what is primarily utilized from two or more peer UEs (e.g., anchor UEs) to estimate the target UE's position?
Option 1: SL-RSTD measurements of SL-PRS and geographical coordinates of peer UEs
Option 2: Cell ID of the serving cell and the signal strength of the peer UEs
Option 3: Round-Trip Time (RTT) measurements from the target UE to the peer UEs
Option 4: Reference Signal Received Power (RSRP) from multiple base stations
Explanation: SL-TDOA positioning relies on measuring the time difference of arrival of Sidelink Positioning Reference Signals (SL-PRS) from multiple peer UEs. The target UE's position is calculated using these SL-RSTD measurements, combined with knowledge of the geographical coordinates of the transmitting peer UEs and their relative sidelink timing, enabling precise location estimation in NG-RAN environments.