An Efficient Resource Allocation Mechanism for Beam-hopping Based LEO Satellite Communication System

Abstract

LEO satellite communication network has become a promising approach to provide broadband access to internet service in low infrastructure areas. However, the LEO satellites are generally cost-constrained and the relative motion between the earth and LEO satellite is high-speed. As a result, the LEO satellite faces limited on-board resources and changing traffic demand distribution. In this paper, we design a beamhopping based system for LEO satellite communication, where the onboard resources are allocated flexibly according to the traffic demand distribution, which can improve the performance of throughput and onboard resource utilization. Specifically, a beam-hopping based LEO satellite communication system is constructed and the resource allocation problem is formulated. Then, we propose a greedy algorithm to resolve it. Evaluation results show that the beam-hopping system outperforms the fixed beam system and random beam hopping system in terms of throughput and request satisfied ratio.