混合射频与光学LEO卫星的吞吐量分析与星载缓冲区大小规划
Throughput Analysis and On-Board Buffer Sizing for Hybrid RF and Optical LEO Satellites
AI总结：
本文分析混合RF/激光LEO卫星网络在有限缓冲、干扰感知调度和天气相关中断下的吞吐量与缓冲区规划，发现通过优化调度优先级可在最小化缓冲需求的同时实现最大吞吐量并降低丢包概率。
摘要：
低地球轨道（LEO）卫星网络正日益采用基于自由空间光通信（FSO）的激光通信。尽管激光星间链路提供高吞吐量和低延迟，但射频（RF）上行和下行链路在恶劣大气条件导致光学中断期间仍为保持连接所必需。混合RF/FSO上行和下行链路由于流量不对称和容量可变，需要在卫星网络节点中进行高效的传输调度和缓冲区大小规划。本文分析了具有有限缓冲区容量、干扰感知调度和天气相关激光链路中断概率的混合RF/激光卫星网络中的吞吐量性能和缓冲区大小规划。数值结果表明，激光通信带来了显著的性能提升。与其通过增加卫星发射功率来最大化吞吐量，我们可以选择合适的传输调度优先级以实现最大吞吐量，同时最小化缓冲区需求，并在不同天气条件和约束下降低丢包概率。
英文摘要：
Low Earth Orbit (LEO) satellite networks are increasingly adopting laser communications based on Free Space Optics (FSO). Although laser inter-satellite links offer high throughput and low latency, RF up- and downlinks remain necessary to maintain connectivity during optical outages caused by adverse atmospheric conditions. The hybrid RF/FSO up- and downlinks require an efficient transmission scheduling and buffer sizing in satellite network nodes, due to traffic asymmetry and variable capacity. This paper analyzes throughput performance and buffer sizing in hybrid RF/laser satellite networks with finite buffer capacity, interference-aware scheduling, and weather-dependent laser link outage probabilities. Numerical results indicate that laser communications bring significant performance gains. Instead of increasing the transmission power of the satellite to maximize the throughput, we can select a suitable transmission scheduling priority to achieve a maximum throughput, while minimizing the buffer requirement, and lowering packet loss probability under varying weather conditions and constraints.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
