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J. Sens. Actuator Netw. 2018, 7(1), 6; doi:10.3390/jsan7010006

A Novel Spectrally Efficient Asynchronous Multi-Channel MAC Using a Half-Duplex Transceiver for Wireless Networks

Department of Computer Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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Author to whom correspondence should be addressed.
Received: 8 December 2017 / Revised: 18 January 2018 / Accepted: 29 January 2018 / Published: 30 January 2018
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Abstract

Multi-channel medium access control (MAC) protocols maximize network performance by enabling concurrent wireless transmissions over non-interfering channels. Despite physical layer advancements, the underlying IEEE 802.11 MAC standard cannot fully exploit features and support high-performance applications. In this work, we propose the novel spectrally efficient asynchronous multi-channel MAC (SA-MMAC) protocol for wireless networks using a single half-duplex transceiver. A full-duplex mode of operation on data channels reduces the signaling overhead and boosts the spectrum efficiency. A revamped contention mechanism of IEEE 802.11 addresses the multi-channel hidden terminal problem, and a jamming signal from the receiver addresses the collisions in control signals. Furthermore, the control channel is used for data transmissions to increase the bandwidth utilization but under a restricted half-duplex mode to avoid causing a bottleneck situation. The simulator is tested for correctness. The results suggest that the protocol can work well on 3, 4, or 12 concurrent channels with high node density, providing about 12.5 times more throughput than IEEE 802.11 and 18% to 95% more throughput than its multi-channel variants under saturated traffic conditions. View Full-Text
Keywords: multi-channel MAC; 802.11 wireless networks; asynchronous; control channel reuse; half-duplex transceiver; event-driven simulation; python simulator; multi-channel hidden terminal multi-channel MAC; 802.11 wireless networks; asynchronous; control channel reuse; half-duplex transceiver; event-driven simulation; python simulator; multi-channel hidden terminal
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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

Devendiran, A.; Sheltami, T.; Mahmoud, A. A Novel Spectrally Efficient Asynchronous Multi-Channel MAC Using a Half-Duplex Transceiver for Wireless Networks. J. Sens. Actuator Netw. 2018, 7, 6.

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