Question: What is one of the functions of Mobility Robustness Optimization in an inter-system environment?
Option 1: To prioritize handovers based on UE speed
Option 2: To detect and prevent ping-pongs between different systems
Option 3: To optimize NG-RAN node configuration for better coverage
Option 4: To manage UE History Information IE in the HANDOVER REQUIRED message
Explanation: Mobility Robustness Optimization is responsible for detecting ping-pongs that occur when a UE is handed over between different systems, such as from 5GS to EPS and back to 5GS within a short time frame. This function helps prevent unnecessary handovers and ensures the UE remains connected to the most suitable system for its service needs.