The growing deployment and advanced development of high-speed train (HST) systems, coupled with the reliance on and demand for constant Internet connectivity any time any where, have necessitated the imminent provisioning of broadband Internet services in HSTs. Train-to-ground communications mostly suffers from frequent handoffs due to the high mobility of the trains. To provision high-speed Internet services in HSTs, we propose a novel solution named Free-space OptiCs Utilization in high-Speed trains (FOCUS). Our solution takes advantage of the high optical bandwidth of free space optics (FSO) to provide high data rates. FOCUS aims to improve the trainto- ground communications system by deploying on-roof FSO transceivers. To minimize the number of handoff processes, the control unit inside the train forwards each request to go through the proper transceiver. The proposed mechanism decreases the packet loss ratio and increases network performance in high-speed train communications.

中文翻译：

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在高速铁路网络中使用 FSO 提供互联网接入


高速列车 (HST) 系统的不断部署和先进发展，加上对随时随地持续互联网连接的依赖和需求，迫切需要在高速列车中提供宽带互联网服务。由于列车的高机动性，车地通信大多受到频繁切换的影响。为了在高铁中提供高速互联网服务，我们提出了一种名为“高速列车中自由空间光学利用”（FOCUS）的新颖解决方案。我们的解决方案利用自由空间光学 (FSO) 的高光学带宽来提供高数据速率。 FOCUS 旨在通过部署车顶 FSO 收发器来改善车地通信系统。为了最大限度地减少切换过程的数量，列车内的控制单元将每个请求转发到适当的收发器。所提出的机制降低了高速列车通信中的丢包率并提高了网络性能。