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However, it also creates new challenges, such as increased interference and difficulty managing mobility. To ensure seamless base station connectivity and maintain a high quality of service, a reliable handover algorithm is necessary, especially in a UDN where the cell size is small. This paper proposes an optimisation method for handover parameters based on the Deep Deterministic Policy Gradient (DDPG) algorithm. It adjusts the handover margin (HOM) to determine the handover trigger points accurately and dynamically. Simulation results indicate that the system’s mobility performance has been greatly improved while maintaining high throughput and low latency at different speeds.",[11,12,13,14,15,16],"Kwong, Chiew Foong","Shi, Chenhao","Liu, Qianyu","Yang, Sen","Chieng, David","Kar, Pushpendu",[18,19,20,21,22,23],null,"0000-0002-1417-8091","0000-0002-2660-7287","0000-0002-1293-8990","0000-0002-9674-3436","0000-0002-0896-0650",2024,"https:\u002F\u002Fdoi.org\u002F10.1016\u002Fj.eswa.2023.122871","W4390570709","Expert Systems with Applications",[29,30,31,32,33,34,35,36,37],"Computer science","Handover","Artificial intelligence","Cellular network","Gradient method","Mathematical optimization","Computer 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