Research On Link Resource Allocation Technology Of Multi-Beam Satellite System

With the continuous development of information network,the traditional terrestrial network is difficult to meet the growing demand for differentiated services due to its characteristics.Satellites with wide coverage and strong communication capabilities are often used as a supplement to other communication systems.Among them,beam-hopping technology of multi-beam satellite can flexibly allocate onboard resources through time fragmentation,which is of great significance in the scenario of resource constraints and uneven spatial-temporal distribution of differentiated services.Therefore,in view of the contradiction between limited satellite resources and communication service quality,this thesis focuses on the joint allocation of satellite point beam and beam power in beam-hopping technology,and discusses the impact of multi-dimensional resource allocation strategy on the performance of multi-beam satellite communication system.The main innovations and work are as follows:First of all,in the framework of multi-beam geostationary orbit satellite communication system,aiming at the problem of limited on-board resources,this thesis studies efficient beam power resource management methods.Introducing the concept of long-term throughput,this thesis proposes a satellite beam power resource allocation algorithm based on long-term throughput,which achieves flexible allocation of satellite resources according to the actual situation of the communication scenario.In the case of resource constraints,the system still has good throughput.Second,for diverse service types,this thesis extracts the coarsegrained features of services according to the delay and importance resource characteristics of various services,establishes the satellite service classification model to classify and manage the differentiated services.This thesis also studies the time-varying law of satellite user service demand,and proposes a beam-hopping satellite system service prediction algorithm to predict the service arrival in the next time slot onboard data buffer queue.Finally,on the basis of ensuring the system throughput,aiming at the problems of limited onboard resources and uneven spatiotemporal distribution of services,this thesis integrates a differentiated service model to further study the impact of multi-dimensional resource allocation on system energy efficiency and communication service quality,and constructs a multi-agent cooperative optimization network model.Based on the traffic flow prediction results,this thesis proposes a multi-objective optimization algorithm for the joint allocation of beam and power of beamhopping satellite to jointly allocate the multi-dimensional resources of the satellite.The experiment shows that the algorithm can effectively reduce energy efficiency,improve the utilization of resources and improve the spectral efficiency of satellite communication system on the basis of ensuring system reliability and user service quality.