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Future Internet 2017, 9(2), 14; doi:10.3390/fi9020014

An Energy Efficient MAC Protocol for Wireless Passive Sensor Networks

1
School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai 264209, China
2
China Mobile Group Shandong Company Limited Dongying Brunch, Dongying 257000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jose Ignacio Moreno Novella
Received: 9 March 2017 / Revised: 14 April 2017 / Accepted: 15 April 2017 / Published: 19 April 2017
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Abstract

Medium Access Control (MAC) protocol is one of the key network protocols that ensure Wireless Sensor Networks (WSNs) maintain high performance during communication. MAC protocol design plays an important role in improving the performances of the whole network. First, Wireless Passive Sensor Networks (WPSNs) and MAC protocols are introduced in this paper. Second, some existing MAC protocols are introduced. Sensor MAC (S-MAC) protocol is analyzed and existing improved backoff algorithms are introduced. A new MAC protocol called Improved Sensor MAC (IS-MAC) is then proposed to solve the problem that the contention window (CW) during carrier sense is fixed in S-MAC protocol. IS-MAC protocol is able to adjust CW in terms of network load, so energy consumption can be decreased. Finally, according to the simulation results on NS2, the proposed protocol has better performance in terms of throughput and energy consumption. View Full-Text
Keywords: Wireless Passive Sensor Networks (WPSNs); Medium Access Control (MAC) protocol; backoff algorithm; contention window (CW); energy efficiency Wireless Passive Sensor Networks (WPSNs); Medium Access Control (MAC) protocol; backoff algorithm; contention window (CW); energy efficiency
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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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MDPI and ACS Style

Yu, Q.; Li, G.; Hang, X.; Fu, K.; Li, T. An Energy Efficient MAC Protocol for Wireless Passive Sensor Networks. Future Internet 2017, 9, 14.

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