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基于ARQ反馈的无人机通信中继自主选择研究
Research on Autonomous Relay Selection in Unmanned Aerial Vehicle Communication Based on ARQ Feedback

DOI: 10.12677/HJWC.2020.106010, PP. 71-78

Keywords: 无人机，中继选择，ARQ反馈，多臂老虎机
UAV, Relay Selection, ARQ Feedback, Multi-Armed Bandit

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Abstract:

无人机通信是实现无人机功能的关键环节，且往往以中继通信方式存在。中继选择是提升中继通信效能的一种重要方法。本文研究无人机中继通信在无信息情况下通过自主学习进行中继选择的问题，提出基于自动重传请求(ARQ)反馈的1 bit成功与否信息构建效用函数(即信息成功传输概率)，并利用多臂老虎机(MAB)中的汤普森采样算法进行中继选择。实验表明，基于ARQ反馈的1 bit信息进行选择，无论信道差异大小，都能以较大的概率最终收敛到最优中继，并且信道差异大时，收敛速度更快更稳定，收敛到最优中继的概率更大。
UAV communication is the key link to realize the function of UAV, and it often exists in the way of relay communication. Relay selection is an important method to improve the efficiency of relay communication. This paper studies the problem of relay selection for UAV relay communication through autonomous learning in the absence of information, and proposes a utility function (that is, the probability of successful information transmission) based on the 1-bit success information feedback from the automatic repeat request (ARQ). And use the Thompson sampling algorithm in the multi-armed slot machine (MAB) for relay selection. Experiments show that the selection based on the 1-bit information of ARQ feedback can converge to the optimal relay with greater probability regardless of the channel difference, and when the channel difference is large, the convergence speed is faster and more stable, and the probability of convergence to the optimal relay is greater.

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