Cooperative Beam Association and Power Allocation in UD-LEO Satellite Communication Networks: A Spectrum Sharing Manner
Cooperative Beam Association and Power Allocation in UD-LEO Satellite Communication Networks: A Spectrum Sharing Manner
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DOI：
10.3390/electronics11030299
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发表时间：
2022-01
期刊：
影响因子：
2.9
通讯作者：
Jianfei Tong;Cheng Wang;Xiaoyan Zhao;Gaofeng Cui;Weidong Wang
中科院分区：
文献类型：
--
作者：
Jianfei Tong;Cheng Wang;Xiaoyan Zhao;Gaofeng Cui;Weidong Wang
近年来，SpaceX和OneWeb等超密集低地球轨道（LEO）卫星通信（UD-LSC）网络正在快速发展，以提供全球范围和宽带服务。然而，数以千计的低轨卫星被部署到太空，导致轨道和频率资源短缺。地球静止轨道（GEO）卫星系统和低轨卫星系统之间的频谱共享似乎是一个有前途的方式来缓解有限的频谱资源的问题。本文研究了一种联合波束关联和功率分配的协作方案，使UD-LSC网络与GEO卫星系统共享同一频谱。针对多颗LEO卫星之间的协作传输，首先提出了一种基于多对多匹配博弈的波束关联（MGBA）算法，以获得LEO卫星与波束小区之间的稳定匹配;然后提出了一种基于逐次凸近似（SCA）的功率分配（SPA）算法，以迭代获得次优的功率分配矩阵。仿真结果表明，所提出的MGBA-SPA方案在通信满意度方面优于其他对比方案，实现了业务请求与各地面波束小区提供容量之间的平衡。
In recent years, the ultra-dense low Earth orbit (LEO) satellite communication (UD-LSC) networks such as SpaceX and OneWeb are under rapid development to provide worldwide and broadband services. However, the deployment of thousands of LEO satellites into space leads to the shortage of the orbital and the frequency resources. Spectrum sharing between geostationary Earth orbit (GEO) satellite systems and LEO satellite systems seems to be a promising way to alleviate the problem of restricted spectrum resources. In this paper, a joint cooperative beam association and power allocation scheme for the UD-LSC network to share the same spectrum with a GEO satellite system is considered. By exploiting the cooperative transmission between multiple LEO satellites, we first propose a many-to-many match game-based beam association (MGBA) algorithm to obtain a stable matching between LEO satellites and beam cells, and then, we propose a successive convex approximation (SCA)-based power allocation (SPA) algorithm to iteratively acquire the sub-optimal power allocation matrix. Simulation results show that the proposed MGBA-SPA scheme outperforms other contrast schemes from the perspective of communication satisfaction, and it realizes the balance between the traffic request and the provided capacity of each ground beam cell.