TCP Performance Over Satellite-Based Hybrid FSO/RF Vehicular Networks: Modeling and Analysis
TCP Performance Over Satellite-Based Hybrid FSO/RF Vehicular Networks: Modeling and Analysis
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DOI：
10.1109/access.2021.3101903
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发表时间：
2021
期刊：
影响因子：
3.9
通讯作者：
Thang V. Nguyen;Chuyen T. Nguyen;Hoang D. Le;A. Pham
中科院分区：
文献类型：
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作者：
Thang V. Nguyen;Chuyen T. Nguyen;Hoang D. Le;A. Pham
近年来，人们对利用低地球轨道卫星网络从空间接入互联网的兴趣日益浓厚。在车联网（IoV）的最后一英里接入领域，混合自由空间光（FSO）/射频（RF）通信最近吸引了全球的研究努力。虽然传输控制协议（TCP）是互联网上部署最广泛的传输协议，但其在LEO卫星辅助的混合FSO/RF车载网络的易出错环境中的性能还没有得到很好的理解。本文开发了一个全面的TCP性能的跨层方法的基础上的分析模型，考虑FSO和RF卫星衰落信道，分别由伽马-伽马和Nakagami- $m$分布建模。采用了RS码和选择性自动重传请求SR-ARQ等差错控制技术。数值结果定量地表明在最后一英里链路的传输错误和不同的参数/设置的错误控制解决方案对TCP性能的影响。该文件还支持选择适当的TCP变种所考虑的网络。
Recent years have witnessed a growing interest in Internet access from space assisted by low earth orbit (LEO) satellite networks. In the domain of the last-mile access for the Internet of Vehicles (IoV), hybrid free-space optical (FSO)/radio-frequency (RF) communication has recently attracted worldwide research efforts. While the transmission control protocol (TCP) is the most widely deployed transport protocol on the Internet, its performance in the error-prone environment of LEO satellite-assisted hybrid FSO/RF vehicular networks is not well understood. This paper develops a comprehensive analytical model based on the cross-layer approach for TCP performance, considering the FSO and RF satellite fading channels, modeled by the Gamma-Gamma and Nakagami- $m$ distributions, respectively. The error-control solutions, including the Reed-Solomon (RS) code and Selective repeat automatic repeat request (SR-ARQ), are also employed. Numerical results quantitatively demonstrate the impact of transmission errors at last-mile links and different parameters/settings of error-control solutions on the TCP performance. The paper also supports the selection of proper TCP variants for the considered networks.