GPS-Free Maintenance of A Free-Space-Optical Link Between Two Autonomous Mobiles
GPS-Free Maintenance of A Free-Space-Optical Link Between Two Autonomous Mobiles
复制标题
两个自主移动设备之间自由空间光链路的无 GPS 维护
DOI：
10.1109/tmc.2016.2602834
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发表时间：
2017
影响因子：
7.9
通讯作者：
G. Winkelmaier
中科院分区：
文献类型：
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作者：
M. Khan;M. Yuksel;G. Winkelmaier
自由空间光（FSO）通信具有提供光级无线通信速度的潜力。它还可以帮助解决传统的基于RF的技术所遇到的无线容量问题。尽管其容量优势，FSO通信是容易移动的。由于FSO收发器是高度定向的，它们需要建立和维护彼此之间的视线（LOS）。我们考虑两个自主的移动的节点，每个节点都有一个FSO收发器安装在一个可移动的头能够旋转360度。我们提出了一种新的方案，处理的问题，自动维护的LOS对齐的两个节点之间的机械转向的FSO收发器。我们设计的协议，以保持满足最低接收功率或信号噪声比（SNR）的手机之间的FSO链路。我们还提出了一个原型实现这样的移动的节点与FSO收发器。对准协议的有效性进行评估，通过分析从模拟和使用原型进行的实验得到的结果。结果表明，通过使用这样的机械可操纵的收发器和一个简单的自动对准机制，它是可能的，以维持光无线链路在移动的设置与标称中断。
Free-Space-Optical (FSO) communication has the potential to provide optical-level wireless communication speeds. It can also help solve the wireless capacity problem experienced by the traditional RF-based technologies. Despite its capacity advantages, FSO communication is prone to mobility. Since the FSO transceivers are highly directional, they require establishment and maintenance of line-of-sight (LOS) between each other. We consider two autonomous mobile nodes, each with one FSO transceiver mounted on a movable head capable of rotating 360 degree. We propose a novel scheme that deals with the problem of automatic maintenance of LOS alignment between the two nodes with mechanical steering of the FSO transceivers. We design protocols to maintain an FSO link between the mobiles satisfying a minimum received power or signal-to-noise ratio (SNR). We also present a prototype implementation of such mobile node with FSO transceivers. The effectiveness of the alignment protocol is evaluated by analyzing the results obtained from both simulations and also experiments conducted using the prototype. The results show that, by using such mechanically steerable transceivers and a simple auto-alignment mechanism, it is possible to maintain optical wireless links in a mobile setting with nominal disruption.