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Open AccessArticle

Measurement and Characterization of Electromagnetic Noise in Edge Computing Networks for the Industrial Internet of Things

School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
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Author to whom correspondence should be addressed.
Sensors 2019, 19(14), 3104; https://doi.org/10.3390/s19143104
Received: 30 April 2019 / Revised: 8 July 2019 / Accepted: 11 July 2019 / Published: 13 July 2019
(This article belongs to the Section Internet of Things)
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Abstract

Edge computing and the Internet of Things (IOT) provide the technological basis for the development of intelligent manufacturing nowadays. In order to support the intelligent interconnection and application of all kinds of equipment in the industrial field, edge computing should be equipped close to or embedded in all kinds of equipment nodes in the industrial wireless network. Therefore, it is meaningful to investigate the wireless network design of the Industrial Internet of Things. Low power wireless sensor devices are widely used in the Industrial Internet of Things (IIoT), which are sensitive to electromagnetic noise. The electromagnetic noises in industrial scenarios are significantly different from the conventional assumed white noise. In this paper, the measurement results of electromagnetic noises at three different test positions are given in an automobile factory. The spectrum occupancy of the factory wireless environment in the 300 MHz–3 GHz band was obtained by frequency domain measurement. In the time domain measurement, four statistical parameters of the three bands of 315 MHz, 433 MHz, and 916 MHz were measured, and the electromagnetic noise distributions in different plant areas and different frequency bands were analyzed. According to the measurement results, the time-varying characteristics of electromagnetic noise can be characterized by continuous hidden Markov models (CHMM). These results are informative to the design and optimization for the edge computing networks for IIoT. View Full-Text
Keywords: edge computing; Industrial Internet of Things; electromagnetic noise; measurement; continuous hidden Markov model edge computing; Industrial Internet of Things; electromagnetic noise; measurement; continuous hidden Markov model
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Li, H.; Liu, L.; Li, Y.; Yuan, Z.; Zhang, K. Measurement and Characterization of Electromagnetic Noise in Edge Computing Networks for the Industrial Internet of Things. Sensors 2019, 19, 3104.

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