Line-of-Sight Discovery in 3D Using Highly Directional Transceivers
Line-of-Sight Discovery in 3D Using Highly Directional Transceivers
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DOI：
10.1109/tmc.2018.2885061
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发表时间：
2019-12
影响因子：
7.9
通讯作者：
M. Khan;S. Bhunia;M. Yuksel;Lawrence Kane
中科院分区：
文献类型：
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作者：
M. Khan;S. Bhunia;M. Yuksel;Lawrence Kane
定向射频(RF) /自由空间光（FSO）收发器有潜力在下一代无线网络中发挥重要作用。它们在提高频谱利用率、提高数据传输速率和降低从不需要的源截获的可能性方面是有利的。尽管有这些优点，使用定向收发器通信需要建立和维护视距（LOS）。因此，在具有RF/FSO定向收发器的移动自组网中，通信链路的建立或邻居发现起着重要的作用。我们考虑在3D空间中悬停的两个节点（无人机或四轴飞行器），每个节点都有一个定向收发器，安装在机械可操纵的球形结构/头部上，它们可以在水平面上360度扫描，在垂直平面上360度扫描。我们提出了一种新的方案来解决这些节点之间LOS对齐的自动发现和建立问题。我们进行了大量的模拟，以证明所提出的邻居发现方法的有效性。我们还开发了一个概念验证原型并进行了实验。仿真和实验结果表明，在不使用GPS支持的情况下，使用这种机械可操纵定向收发器可以在几秒钟内与相似的相邻节点建立通信链路。
Directional Radio Frequency (RF) / Free-Space-Optical (FSO) transceivers have the potential to play a significant role in future generation wireless networks. They are advantageous in terms of improved spectrum utilization, higher data transfer rate, and lower probability of interception from unwanted sources. Despite these advantages, communications using directional transceivers require establishment and maintenance of line-of-sight (LOS). Thus, establishment of the communication link or neighbor discovery plays an important role in mobile ad hoc networks with RF/FSO directional transceivers. We consider two nodes (Unmanned Aerial Vehicles (UAVs) or quadcopters) hovering in 3D space, each with one directional transceiver mounted on a mechanically steerable spherical structure/head, with which they can scan 360 degrees in the horizontal plane and 360 degrees in the vertical plane. We propose a novel scheme that deals with the problem of automatic discovery and establishment of LOS alignment between these nodes. We performed extensive simulations to show the effectiveness of the proposed neighbor discovery method. We also developed a proof-of-concept prototype and conducted experiments with it. The results obtained from both simulations and experiments show that, using such mechanically steerable directional transceivers, it is possible to establish communication links to similar neighboring nodes within several seconds without using GPS support.