Mobility Robustness Optimization in Future Mobile Heterogeneous Networks: A Survey

Ensuring reliable and stable communication during the movements of mobile users is one key issues in networks. In recent years, several studies have been conducted to address related Handover (HO) self-optimization Heterogeneous Networks (HetNets) for Fourth Generation (4G) Fifth (5G) Various solutions developed determine or estimating optimum ideal settings Control Parameters (HCPs), such as Time-To-Trigger (TTT) Margin (HOM). However, complexity, high requirements, upcoming structure ultra-dense HetNets require more advanced HO techniques future implementation. This paper that may implemented next-generation by reviewing state-of-the-art algorithms. The discussed this survey are focus on Mobility Robustness Optimization (MRO), which a significant function 4G 5G applied will preserve continuous connection between User Equipment (UE) eNBs UE mobility, thereby enhancing quality. various algorithms revealed different outcomes. discusses pros cons these techniques, further examines challenges solutions. New directions implementation also identified. contribute understanding mobility management, particularly relation control parameters HetNets.