PROJECT TITLE :

Experimental Link Quality Characterization of Wireless Sensor Networks for Underground Monitoring

ABSTRACT:

Wireless underground sensor networks (WUSNs) are a category of wireless sensor networks (WSNs) with buried nodes, which communicate wirelessly through soil with sensor nodes located aboveground. Because the communication medium (i.e., soil) between traditional over-the-air WSNs and WUSNs differs, communication characteristics should be totally characterized for WUSNs, specifically to enable development of economical communication protocols. Characterization of link quality could be a fundamental building block for varied communication protocols. The aim of this paper is to experimentally investigate the link quality characteristics of the 3 communication channels obtainable in WUSNs for underground pipeline monitoring to gain further insight into protocol development for WUSNs. To this finish, received signal strength (RSS), link quality indicator (LQI), and packet reception ratio (PRR) are characterised for the 3 communication channels in WUSNs. The RSS and PRR results show that the underground-to-underground channel is extremely symmetric and temporally stable, however its range is severely restricted, and that the aboveground-to-underground/underground-to-underground channels are uneven and exhibit similar temporal properties to over-the-air communication channels. Interestingly, the results show that RSS could be a higher indicator of PRR than LQI for all three channels underneath thought.


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