Section: 15.5.2 Support for Mobility Robustness Optimization 15.5.2.1 General
Content: Mobility Robustness Optimisation aims at detecting and enabling correction of following problems: - Connection failure due to intra-system or inter-system mobility; - Inter-system Unnecessary HO (too early inter-system HO from NR to E-UTRAN with no radio link failure); - Inter-system HO ping-pong; - PSCell change failure; - Inter-system voice fallback failure; - Fast MCG recovery failure. MRO provides means to distinguish the above problems from NR coverage related problems and other problems, not related to mobility. For detection of a sub-optimal successful handovers, MRO additionally enables observability of: - Successful HO due to intra-NR mobility; - Successful HO due to inter-RAT mobility. For detection of a sub-optimal successful PSCell addition/change, MRO additionally enables observability of: - Successful PSCell addition/change.