Path loss exponent analysis in Wireless Sensor Networks: Experimental evaluation
Path loss exponent analysis in Wireless Sensor Networks: Experimental evaluation
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DOI：
10.1109/indin.2013.6622857
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
J. Miranda;R. Abrishambaf;T. Gomes;Paulo Goncalves;J. Cabral;A. Tavares;J. Monteiro
中科院分区：
文献类型：
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作者：
J. Miranda;R. Abrishambaf;T. Gomes;Paulo Goncalves;J. Cabral;A. Tavares;J. Monteiro
无线传感器网络是一项新兴的技术，近年来在许多领域得到了应用。由于其无线特性，对其传播模型的分析对性能评估具有重要的理论意义和实用价值。在这方面，路径损耗指数是无线通信分析中被广泛考虑的重要参数之一。现有文献对无线传感器网络的路径损耗指数有几种理论评价。然而，目前还缺乏对路径损耗指数和阴影效应的实验评估。本文选择了无线传感器节点广泛部署的三个环境(自由空间、建筑和工业)来评估实验分析。利用接收信号强度指示器(RSSI)测量路径损耗和路径损耗指数，并在此基础上计算阴影效应的标准差。所有的测量参数都与文献中的理论分析进行了比较。
Wireless Sensor Networks are an emerging technology which has been recently adopted in many applications. Due to its wireless nature, the analysis of the radio propagation models plays an important role for performance evaluation in both theoretical and practical aspects. In this regards, path loss exponent is one of the most important parameter which has been considered widely in wireless communications analysis. There are several theoretical evaluations of path loss exponent for wireless sensor networks available in the literature. However there is a lack of experimental evaluation of both path loss exponent and the effect of shadowing. In this paper, three environments (free space, in building and industrial), where wireless sensor nodes are widely deployed, have been chosen in order to evaluate the experimental analysis. Path loss and path loss exponent are measured by means of Received Signal Strength Indicator (RSSI) and based on them, the standard deviation of shadowing effect is also calculated. All the measured parameters are compared with the theoretical analysis available in the literatures.