Question: For a User Equipment (UE) to transmit Sidelink Positioning Reference Signals (SL-PRS) using Scheme 2 resource selection, what are the conditions regarding its location and Radio Resource Control (RRC) state?
Option 1: The UE must be in RRC_CONNECTED state and inside NG-RAN coverage.
Option 2: The UE can be in any RRC state but must be outside NG-RAN coverage.
Option 3: The UE can transmit SL-PRS in any RRC state, both when inside NG-RAN coverage and when outside NG-RAN coverage.
Option 4: The UE must be in RRC_IDLE state and specifically directed by the network to transmit while inside NG-RAN coverage.
Explanation: According to the specifications for Scheme 2 resource selection, a UE can autonomously select transmission resources for SL-PRS from allocated resource pools without needing a specific RRC state (e.g., RRC_CONNECTED) and this flexibility applies whether the UE is inside or outside NG-RAN coverage. This highlights the autonomous nature of Scheme 2, allowing for more flexible deployment scenarios for sidelink positioning methods like SL-RTT, SL-AoA, SL-TDOA, and SL-TOA.