Question: What is the primary purpose of the Sidelink Positioning Reference Signal (SL-PRS) in NR and NG-RAN?
Option 1: To facilitate handover procedures between different base stations.
Option 2: To enable UE positioning using cellular-based methods, such as OTDOA and E-CID.
Option 3: To support sidelink communication for public safety applications.
Option 4: To facilitate Ranging/Sidelink positioning methods, such as SL-TOA, SL-TDOA, SL-RTT, SL-AoA.
Explanation: The Sidelink Positioning Reference Signal (SL-PRS) is specifically designed to support sidelink positioning methods, which enable User Equipment (UE) to determine its location using signals received from other UEs or base stations. These methods include SL-TOA (Sidelink Time of Arrival), SL-TDOA (Sidelink Time Difference of Arrival), SL-RTT (Sidelink Round Trip Time), and SL-AoA (Sidelink Angle of Arrival). The correct answer is Option 4, as it accurately reflects the primary purpose of SL-PRS.