Research on QoS-Sensitive Interference Avoidance Algorithm Based on Multi-Beam Coordinated Scheduling for Beam Hopping Satellite Systems

This paper investigates the downlink resource allocation and beam scheduling strategy for beam hopping satellite system. To avoid the co-frequency interference caused by multi-beams dwelled in adjacent cells, a QoS-sensitive Interference Avoidance Algorithm based on Multi-Beam Coordinated Scheduling (QIMC) is proposed. Initially, an interference threshold model is established based on the clustering mapping relationship between beams and cells. Subsequently, an objective function is constructed based on delay thresholds and cache capacity, which is used to differentiate the priority of beam scheduling. Then the Maximum-Largest Weighted Delay First (M-LWDF) function is optimized to consider the system performance, integrating throughput, traffic demand, and service fairness, which achieves real-time joint scheduling and space-time domain resource allocation for Inter-cluster beams. The QIMC algorithm enhances system reliability by mitigating interference between adjacent cells and ensures the QoS requirements for differentiated traffic. Simulation results show that the QIMC algorithm safeguards the traffic demands by reducing the Packet Loss Ratio (PLR) and average delay, and improves the system throughput. This demonstrates the superiority of the algorithm.