Reinforcement learning system to mitigate small-cell interference through directionality
Reinforcement learning system to mitigate small-cell interference through directionality
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DOI：
10.1109/pimrc.2017.8292393
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
Anton Paatelma;D. Nguyen;H. Saarnisaari;Nagarajan Kandasamy;K. Dandekar
中科院分区：
文献类型：
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作者：
Anton Paatelma;D. Nguyen;H. Saarnisaari;Nagarajan Kandasamy;K. Dandekar
使用定向天线的波束控制技术预计将通过无处不在的小基站部署在无线网络容量扩展中发挥重要作用。然而，由于增加的协议开销以及缺乏能够很好地适应环境变化的强大天线波束选择技术，将定向天线集成到小型蜂窝的现有无线 PHY 和 MAC 堆栈中一直具有挑战性。本文介绍了 LinkPursuit 的设计、实现和评估，这是一种用于定向小蜂窝网络中分布式天线状态选择的新型学习协议。 LinkPursuit 依靠可重新配置的天线和同步时分多址 (TDMA) MAC 来实现同时定向传输和接收。此外，该系统采用了基于强化学习文献中众所周知的自适应追踪算法的实用天线选择协议。我们在 WARP 平台上实现了 LinkPursuit 的实时原型，并进行了大量实验来评估其性能。实证结果表明，在不同程度的交叉链路干扰下，LinkPursuit中适当使用方向性可以比全向传输获得更高的网络总速率。
Beam-steering techniques using directional antennas are expected to play an important role in wireless network capacity expansion through ubiquitous small-cell deployment. However, integrating directional antennas into the existing wireless PHY and MAC stack of small cells has been challenging due to the added protocol overhead and lack of a robust antenna beam selection technique that can adapt well to environmental changes. This paper presents the design, implementation, and evaluation of LinkPursuit, a novel learning protocol for distributed antenna state selection in directional small-cell networks. LinkPursuit relies on reconfigurable antennas and a synchronous TimeDivision Multiple Access (TDMA) MAC to achieve simultaneous directional transmission and reception. Further, the system employs a practical antenna selection protocol based on the well known adaptive pursuit algorithm from the reinforcement learning literature. We implement a realtime prototype of LinkPursuit on the WARP platform and conduct extensive experiments to evaluate its performance. The empirical results show that appropriate use of directionality in LinkPursuit can result in higher network sum rates than omnidirectional transmission under various degrees of cross-link interference.