通信学报2025，Vol.46Issue(3)：212-220,9.DOI:10.11959/j.issn.1000-436x.2025051
基于非稳态MAB的低地球轨道卫星系统异构用户接入方法
Non-stationary MAB based access method for heterogeneous users in LEO satellite systems
摘要
Abstract
Provided that both throughput-sensitive and delay-sensitive users access the low earth orbit(LEO)satellite sys-tem simultaneously,a non-orthogonal multiple access(NOMA)access method using non-stationary multi-armed bandit(MAB)was proposed to enhance the system spectral efficiency and access flexibility for the heterogeneous users.Firstly,a utility function was established to jointly consider the age of information(AoI)of delay-sensitive users and the through-put requirements of throughput-sensitive users.Then,an optimization problem was formulated to maximize the joint util-ity function,while satisfying the constraints of rate thresholds and packet buffering time.Since the traditional convex op-timization methods couldn't solve this problem,by using the beamforming to suppress the inter-group interference,a dy-namic access scheme based on the non-stationary MAB was proposed to realize the intelligent pairing,scheduling,and reliable access for the heterogeneous users.Finally,computer simulations demonstrate the reliability and superiority of the proposed method,and reveal the impact of discount factor and packet buffer threshold on the system performance.关键词
低地球轨道卫星系统/非正交多址接入/信息年龄/非稳态多臂赌博机Key words
LEO satellite system/non-orthogonal multiple access/age of information/non-stationary MAB分类
电子信息工程引用本文复制引用
林敏,孙昊,赵柏,郭焱,杨绿溪..基于非稳态MAB的低地球轨道卫星系统异构用户接入方法[J].通信学报,2025,46(3):212-220,9.基金项目
国家自然科学基金资助项目(No.62471255) The National Natural Science Foundation of China(No.62471255) （No.62471255）
