基于强化学习的云意识的HAPS轨迹优化在软切换混合FSO/RF合作传输系统中
Beibei Cui1,2, Shanyong Cai1,2, Liqian Wang1,2
1School of Electronic Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China.
Sensors (Basel, Switzerland)
|February 13, 2026
概括
本研究引入了一种使用无级代码 (RCs) 和深度强化学习 (DRL) 进行混合自由空间光学/无线电频率 (FSO/RF) 通信的新软切换方法. RC-PPO方法提高了高海拔平台站 (HAPS) 的网络吞吐量和轨迹平滑性.
科学领域:
- 卫星通信 卫星通信
- 光学无线通信的无线通信.
- 网络弹性 网络弹性
背景情况:
- 自由空间光学 (FSO) 链路提供高容量,但受到云引发的可用性问题.
- 混合FSO/射频 (RF) 系统和轨道优化提高了弹性,但传统的硬开关 (HS) 会导致不稳定.
- 现有的方法在混合FSO/RF系统中难以应对频繁的链路转换和不稳定的吞吐量.
研究的目的:
- 为使用软切换和深度强化学习 (DRL) 的混合FSO/RF系统开发一个共同的优化框架.
- 通过优化高空平台站 (HAPS) 轨迹,提高空间-空中-地面网络的稳定性和吞吐量.
- 为了应对DRL培训中无等级代码 (RCs) 的稀疏反所带来的挑战.
主要方法:
- 提出了一个联合优化框架,将软切换与RC和DRL集成在一起,以优化HAPS轨迹.
- 开发了一个以奖励形式的近接政策优化 (PPO) 代理来处理稀疏的RC反.
- 利用现实的ERA5气象数据进行模拟,以评估拟议的RC-PPO方法.
主要成果:
- 与硬切换近接政策优化 (HS-PPO) 基线相比,RC-PPO方法实现了更高的吞吐量.
- 模拟表明,使用RC-PPO方法,HAPS轨迹更加顺.
- 拟议的软切换机制使FSO和RF链路的同时传输成为可能,从而改善了数据接收.
结论:
- 该RC-PPO框架有效地提高了混合FSO/RF空间-空气-地面系统的吞吐量和轨道平滑性.
- 使用RC和基于DRL的轨迹优化软切换提供了比传统硬切换更稳定,更有效的解决方案.
- 这种方法通过HAPS提高了无处不在连接的整体弹性和性能.
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