Research On Resource Allocation Of High Throughput Satellite Based On Beam-hopping

As a powerful supplement to the ground communication,due to its long frequency bandwidth,wide coverage,long transmission distance,strong adaptability,satellite communication is widely used.In order to meet the growing demand for traffic,high-throughput satellites have emerged.Its beams have larger coverage areas and larger cells to supplement and expand dense ground networks.Due to the diversity of service types,traditional resource allocation for multi-beam is likely to limit satellite performance and cause a waste of resource.In order to make effective use of on-board resources,many scholars at home and abroad have made in-depth research on resource allocation,and proposed a theory named "beam-hopping",which could optimize satellite resources from time domain.Its resource allocation algorithm and pattern design have also become a hot topic.However,the existing research has drawbacks such as low spectrum utilization,serious co-channel interference,complicated calculations,waste of resources,requirements of high-traffic beams can't be met,discrete time allocation of beam,relatively abstract technical concepts and so on.Considering the problems above,this paper first uses full frequency reuse in the business model.In terms of resource allocation,power allocation is done according to the traffic requirements of each cluster.Moreover,the convex optimization algorithm is improved in slot allocation and the combination algorithm is used to complete the reallocation of slots.Simulation results show that the improved algorithm imcreases business satisfaction,reduces the complexity of calculation,lowers waste of resources,makes the allocated traffic meet the dynamic demand better.Secondly,pre-assignment is used as the basis,with the help of interference avoidance mechanism of space division and time division,the design of the beam-hopping pattern uses high-traffic beam priority as the criterion.The results show that the beams with high traffic demand are met and the time allocation of single beam is relatively continuous.Finally,based on the STK+Matlab platform,this paper completes the scenario simulation of the resource allocation algorithm,including processes like scenario establishment,generation of deamand traffic,allocation of resources and so on.Which intuitively demonstrates the flexibility of beam-hopping and verify the feasibility and effectiveness of the algorithm.