Question: In a 5G NR network, for the UE to trigger Event A4 (Neighbour becomes better than threshold), what condition must be met considering the hysteresis parameter (Hys) and the variables defined for this event?
Option 1: Mn + Ofn - Ocn < Thresh - Hys
Option 2: Mn + Ofn + Ocn + Hys > Thresh
Option 3: Mn + Ofn + Ocn – Hys > Thresh
Option 4: Mn - Ofn + Ocn + Hys < Thresh
Explanation: To trigger Event A4 (entering condition), the neighbouring cell's measurement must surpass a certain threshold after considering offsets but before applying hysteresis. This ensures the neighbour is significantly better, warranting potential handover or reevaluation of the serving cell. The correct formula reflects this logic by subtracting the hysteresis from the combined measurements and offsets, then comparing it to the threshold (Mn + Ofn + Ocn – Hys > Thresh). This setup prevents premature triggering due to minor fluctuations, aligning with the purpose of hysteresis in wireless networks.