Practical Considerations in the Implementation of Collaborative Beamforming on Wireless Sensor Networks.
Practical Considerations in the Implementation of Collaborative Beamforming on Wireless Sensor Networks.
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DOI：
10.3390/s17020237
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发表时间：
2017-01-26
期刊：
影响因子：
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通讯作者：
García-Pineda M
中科院分区：
文献类型：
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作者：
Felici-Castell S;Navarro EA;Pérez-Solano JJ;Segura-García J;García-Pineda M
无线传感器网络(WSNs)是由空间分布的自主传感器设备组成的，称为MOTES。这些微尘有自己的电源、处理单元、传感器和无线通信，但有许多限制，如有限的能量、带宽和计算能力。在这些网络中，至少有一个称为信宿的微尘充当与其他网络连接的网关。这些传感器网络运行监控应用程序，然后这些微尘收集的数据需要由接收器检索。当该接收器位于远场时，文献中已经有许多基于协作波束成形(CB)的建议，也称为分布式或协作波束成形，以使这些远程通信到达该接收器。在本文中，我们对相关工作进行了深入的研究，并分析了做好CB的要求。为了在真实场景中实施这些通信，我们将从商业微尘及其约束的角度考虑这些要求和假设是否可行。此外，我们将更进一步，考虑不同的替代方案，通过放宽这些要求，试图找到可行的假设来与商业微尘进行这些类型的通信。这项研究考虑了没有一个中央时钟来同步WSN中的所有微尘，并且所有微尘具有相同的硬件。这是一项在无线传感器网络上进行CB的可行性研究，使用从商业微尘的实验数据中获得的随机延迟的模拟场景。
Wireless Sensor Networks (WSNs) are composed of spatially distributed autonomous sensor devices, named motes. These motes have their own power supply, processing unit, sensors and wireless communications However with many constraints, such as limited energy, bandwidth and computational capabilities. In these networks, at least one mote called a sink, acts as a gateway to connect with other networks. These sensor networks run monitoring applications and then the data gathered by these motes needs to be retrieved by the sink. When this sink is located in the far field, there have been many proposals in the literature based on Collaborative Beamforming (CB), also known as Distributed or Cooperative Beamforming, for these long range communications to reach the sink. In this paper, we conduct a thorough study of the related work and analyze the requirements to do CB. In order to implement these communications in real scenarios, we will consider if these requirements and the assumptions made are feasible from the point of view of commercial motes and their constraints. In addition, we will go a step further and will consider different alternatives, by relaxing these requirements, trying to find feasible assumptions to carry out these types of communications with commercial motes. This research considers the nonavailability of a central clock that synchronizes all motes in the WSN, and all motes have identical hardware. This is a feasibility study to do CB on WSN, using a simulated scenario with randomized delays obtained from experimental data from commercial motes.