Joint beam-hopping pattern scheduling and power allocation for LEO satellite network

Due to the constraints of satellite payloads, traditional multi beam approaches often lead to the inefficient allocation of limited resources when addressing uneven traffic demands. One major trend noticed in satellite networks is the implementation of beam-hopping and full frequency multiplexing. It gives us flexibility in adjusting the time and power domains, enabling us to fulfil the uneven traffic demands and user latency performance requirements through appropriate beamhopping pattern (BHP) scheduling and power allocation. This paper proposes a joint beam-hopping pattern scheduling and power allocation scheme for low earth orbit (LEO) satellite networks to address the uneven traffic demands while ensuring the latency performance requirements of users. The problem is formulated as maximizing the minimum traffic satisfaction rate by optimizing the BHPs and power allocation across time slots. To solve this mixed-integer non-convex problem, a twostep approach is adopted. For areas with high levels of traffic demand, the proposed joint beam-hopping and power allocation strategy delivers over 90% traffic satisfaction. When compared to optimization without beam-hopping, it increases total system throughput by 15%.