Question: What does the parameter `ims-VoiceOverNR-PDCP-MCG-Bearer-r15` indicate in relation to a User Equipment's (UE) NR PDCP capabilities?
Option 1: Whether the UE supports IMS voice over NR PDCP with only Master Cell Group (MCG) RLC bearer.
Option 2: Whether the UE supports IMS voice over NR PDCP with both MCG and Secondary Cell Group (SCG) RLC bearers.
Option 3: The maximum number of ROHC context sessions supported by the UE for IMS voice over NR.
Option 4: Whether the UE can continue an existing ROHC context for IMS voice calls when switching between MCG and SCG.
Explanation: This parameter specifically pertains to the support of IMS (IP Multimedia Subsystem) voice services over New Radio (NR) Packet Data Convergence Protocol (PDCP), focusing on the Master Cell Group (MCG) Radio Link Control (RLC) bearer. It indicates whether a UE is capable of handling IMS voice communications using only the MCG RLC bearer in an NR setup, which is crucial for understanding the device's compatibility with specific network configurations for voice services.