Flexible Resource Allocation for Differentiated QoS Provisioning in Beam-Hopping Satellite Communications System

Beam hopping technology can flexibly allocate system resources to achieve on-demand coverage in satellite communication system. However, most of the current research mainly focused on the improvement of system capacity while ignoring the optimization of user delay and quality of service (QoS). In this paper, we propose a maximal user service weight gain (maxUSWG) resource allocation algorithm in beam hopping satellite communication system. Specifically, the user service weight gain is determined by the current traffic demand and delay sensitivity of the cell. We propose to use the combination weights method for multiple attribute decision making based on maximizing deviations to calculate the weight of traffic demand and delay sensitivity. After the weighted decision attributes are obtained, the user service weight gain can be combined and evaluated. In order to maximize the user service weight gain, we allocate resources to the cell with larger weight gain until the power is exhausted or the number of working beams reaches a certain threshold. The simulation results show that the algorithm maxUSWG can effectively improve the QoS, increase the system throughput and improve the resource utilization.