On the basics of Conditional Handover for 5G mobility

We are studying the mobility performance, outage and the signaling overhead of conditional handover (CHO) in Fifth Generation New Radio (5G NR) environment with challenging mobility. We observe that CHO will bring mobility robustness and outage gain but could lead to significant increase in signaling if not properly parameterized. Also, mobility robustness optimization (MRO) for CHO and CHO triggering based on source quality are found to improve performance significantly without increased signaling.