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Sensors 2019, 19(2), 272; https://doi.org/10.3390/s19020272

Efficient Location Service for a Mobile Sink in Solar-Powered Wireless Sensor Networks

1
Department of Electronic Engineering, Soongsil University, Seoul 06978, Korea
2
Department of Smart Systems Software, Soongsil University, Seoul 06978, Korea
3
Department of Software Convergence, Soongsil University, Seoul 06978, Korea
*
Author to whom correspondence should be addressed.
Received: 9 December 2018 / Revised: 5 January 2019 / Accepted: 8 January 2019 / Published: 11 January 2019
(This article belongs to the Special Issue Energy Harvesting Sensor Systems)
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Abstract

By utilizing mobile sinks in wireless sensor networks (WSNs), WSNs can be deployed in more challenging environments that cannot connect with the Internet, such as those that are isolated or dangerous, and can also achieve a balanced energy consumption among sensors which leads to prolonging the network lifetime. However, an additional overhead is required to check the current location of the sink in order for a node to transmit data to the mobile sink, and the size of the overhead is proportional to that of the network. Meanwhile, WSNs composed of solar-powered nodes have recently been actively studied for the perpetual operation of a network. This study addresses both of these research topics simultaneously, and proposes a method to support an efficient location service for a mobile sink utilizing the surplus energy of a solar-powered WSN. In this scheme, nodes that have a sufficient energy budget can constitute rings, and the nodes belonging to these rings (which are called ring nodes) maintain up-to-date location information on the mobile sink node and serve this information to the other sensor nodes. Because each ring node only uses surplus energy to serve location information, this does not affect the performance of a node’s general operations (e.g., sensing, processing, and data delivery). Moreover, because multiple rings can exist simultaneously in the proposed scheme, the overhead for acquiring the position information of the sink can be significantly reduced, and also hardly increases even if the network size becomes larger. View Full-Text
Keywords: solar-powered; wireless sensor network; mobile sink; energy-aware; location service; scalable; blackout time; throughput; latency solar-powered; wireless sensor network; mobile sink; energy-aware; location service; scalable; blackout time; throughput; latency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kang, M.; Yoon, I.; Noh, D.K. Efficient Location Service for a Mobile Sink in Solar-Powered Wireless Sensor Networks. Sensors 2019, 19, 272.

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