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Open AccessArticle

An Optimized Relay Selection Technique to Improve the Communication Reliability in Wireless Sensor Networks

1
Department of Automation and Systems, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
2
Department of Computer Engineering, Federal University of Santa Catarina, Araranguá 88906-072, Brazil
3
INEGI, Faculty of Engineering, University of Porto, Porto 4200-465, Portugal
4
Catarinense Federal Institute, Blumenau 89070-270, Brazil
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
This paper is extension version of the conference paper: Laurindo, S.; Nassiffe, R.; Moraes, R.; Montez, C.; Araujo, G.; Valle, O. Smart: Adequate selection of relay nodes to support cooperative communication in WSNs. In Proceedings of the 2017 IEEE 13th International Workshop on Factory Communication Systems (WFCS), Trondheim, Norway, 31 May–2 June 2017.
Sensors 2018, 18(10), 3263; https://doi.org/10.3390/s18103263
Received: 20 July 2018 / Revised: 13 September 2018 / Accepted: 20 September 2018 / Published: 28 September 2018
(This article belongs to the Section Internet of Things)
Wireless Sensor Networks (WSN) are enabler technologies for the implementation of the Internet of Things (IoT) concept. WSNs provide an adequate infrastructure for the last-link communication with smart objects. Nevertheless, the wireless communication medium being inherently unreliable, there is the need to increase its communication reliability. Techniques based on the use of cooperative communication concepts are one of the ways to achieve this target. Within cooperative communication techniques, nodes selected as relays transmit not only their own data, but also cooperate by retransmitting data from other nodes. A fundamental step to improve the communication reliability of WSNs is related to the use of efficient relay selection techniques. This paper proposes a relay selection technique based on multiple criteria to select the smallest number of relay nodes and, at the same time, to ensure an adequate operation of the network. Additionally, two relay updating schemes are also investigated, defining periodic and adaptive updating policies. The simulation results show that both proposed schemes, named Periodic Relay Selection and Adaptive Relay Selection, significantly improve the communication reliability of the network, when compared to other state-of-the-art relay selection schemes. View Full-Text
Keywords: relay selection; cooperative diversity; cooperative communication; wireless sensor network; WSN relay selection; cooperative diversity; cooperative communication; wireless sensor network; WSN
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Laurindo, S.; Moraes, R.; Nassiffe, R.; Montez, C.; Vasques, F. An Optimized Relay Selection Technique to Improve the Communication Reliability in Wireless Sensor Networks. Sensors 2018, 18, 3263.

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