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Future Internet 2017, 9(2), 19;

An Adaptive Back-Off Mechanism for Wireless Sensor Networks

School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai 264209, China
Shandong Computer Science Center, Jinan 250014, China
Shandong Provincial Key Laboratory of Computer Networks, Jinan 250014, China
Author to whom correspondence should be addressed.
Academic Editor: Jose Ignacio Moreno Novella
Received: 6 April 2017 / Revised: 11 May 2017 / Accepted: 22 May 2017 / Published: 1 June 2017
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Wireless sensor networks (WSNs) have been extensively applied in many domains such as smart homes and Internet of Things (IoT). As part of WSNs’ communication protocols, back-off mechanisms play an essential role in the deployment of wireless channels for network nodes and have been at the core of ensuring effective communication. The performance of many back-off algorithms is excellent in light or middle load networks. However, it degrades dramatically in heavy load networks. In this paper, we propose an adaptive contention window medium access control (MAC) protocol to improve the throughput performance under heavy load. By using the number of historical collisions as the parameter in the back-off mechanism to reflect the channel status, the size of the contention window is adjusted automatically, and the throughput of network is then improved. Simulation results show that our optimized MAC protocol has higher throughput and energy efficiency. View Full-Text
Keywords: wireless sensor networks; MAC protocols; back-off mechanism; throughput wireless sensor networks; MAC protocols; back-off mechanism; throughput

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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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Sun, P.; Li, G.; Wang, F. An Adaptive Back-Off Mechanism for Wireless Sensor Networks. Future Internet 2017, 9, 19.

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