Beam Handover Based on Multi-Attribute Decision in User-Centric LEO Satellite Networks

User terminals are subjected to frequent handovers in the multi-beam low-orbit satellite networks. In order to achieve a better balance between the user's communication quality and system performance, we construct a multi-beam low-orbit satellite coverage model and propose a multi-attribute decision scheme to select the handover target beam. This paper considers not only beam handover but also inter-satellite handover. The weight of the attribute is based on user preference and realtime system measurements, which include both subjective and objective metric. Simulation results show that the proposed handover scheme outperforms the existing traditional ones in terms of inter-satellite handover times, the average signal strength, and the average channel utilization variance.