基于延迟接受的低轨星座用户接入策略  

Delayed Acceptance-based User Access Strategy for Low Earth Orbit Satellite Constellations

作　　者：李学富 耿座学 王英伍 王培继 赵思卫 朱宇 杨明 魏小兰 刘靖 LI Xuefu;GENG Zuoxue;WANG Yingwu;WANG Peiji;ZHAO Siwei;ZHU Yu;YANG Ming;WEI Xiaolan;LIU Jing(Nujiang Power Supply Bureau,Yunnan Power Grid Co.,Ltd,Lushui,Yunan 673199,China;Aerosapce ShenZhou Smart System Technology Co.,Ltd,Beijing 100029,China)

机构地区：[1]云南电网有限责任公司怒江供电局,云南泸水673199 [2]航天神舟智慧系统技术有限公司,北京100029

出　　处：《航天器工程》2024年第1期26-35,共10页Spacecraft Engineering

摘　　要：针对低轨星座用户接入问题,设计了一种基于延迟接受的用户接入策略,综合考虑了多属性偏好序信息。对星地融合通讯系统进行建模,并利用连接关系矩阵描述用户与基站之间的覆盖关系。同时,根据卫星中继基站位置和低轨星座构型计算出卫星中继基站与卫星之间的连接关系矩阵,并将频谱资源划分为信道单元。根据建立的模型,综合考虑信道资源分配和干扰管理,提出多属性评价的偏好序信息,包括用户与小区回程链路的信道增益、干扰增益、小区回程容量和小区负载水平等。经过理论分析证明了所提出的匹配策略的稳定性和帕累托最优性。仿真结果表明所提出的用户接入策略(UADA)算法性能明显优于其他算法。In response to the user access challenges in low earth orbit(LEO)constellations,a delayed acceptance-based user access strategy is designed by considering a comprehensive integration of multi-attribute preference order information.Construct the model of the satellite-ground fusion communication system and describe the coverage relationship between users and base stations by connection matrix.Simultaneously,the connection relationship matrix between satellite relay stations and satellites is calculated by considering the positions of satellite relay stations and the LEO constellation configuration.Furthermore,the spectrum resources are divided into channel units.Based on the established model,a user access strategy research method,utilizing combinatorial optimization,is employed to comprehensively consider channel resource allocation and interference management methods.Multiple attributes for preference ordering are proposed,including channel gain,interference gain,backhaul capacity,and cell load level between users and cell backhaul links.Theoretical analysis demonstrates the stability and Pareto optimality of the proposed matching strategy.The simulation results show that the performance of the proposed UADA algorithm is significantly better than other algorithms.

关 键 词：星地融合通信系统 低轨星座 卫星中继基站 用户接入策略 延迟接受 

分 类 号：TN927[电子电信—通信与信息系统]