Enhancing the Handover Performance in Heterogeneous High-speed Railway Communication Networks: A Bayesian-based Method

How to improve the handover performance is one fundamental issue in high-speed railway communication (HSRC) network. This paper proposes a novel handover enhancement scheme for the Control/User plane split heterogeneous network in the HSRC network. In contrast to traditional handover scheme, the proposed handover scheme triggers the handover on the basis of a predicted reference handover point (RHP) to reduce the communication interruption to both serving and target eNBs. To facilitate the proposed scheme, a nonlinear relationship among the distance to RHP, the received signal strength (RSS) and the speed of the train is modeled based on the distribution of RSS. Further, a handover trigger scheme is proposed based on Bayesian regression. Simulation results show that compared with traditional handover scheme, the proposed one achieves lower outage probability.