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Interference Range-Reduced Cooperative Multiple Access with Optimal Relay Selection for Large Scale Wireless Networks

1,2,3, 1,2,3,4, 1,2,3, 1,2,3, 5,* and 6
1
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
2
Beijing Laboratory for General Aviation Technology, Beijing 100191, China
3
Beijing Key Laboratory for Network-Based Cooperative Air Traffic Management, Beijing 100191, China
4
Sino-French Engineer School, Beihang University, Beijing 100191, China
5
School of Computer Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China
6
Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77840, USA
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(11), 2565; https://doi.org/10.3390/s19112565
Received: 2 May 2019 / Revised: 25 May 2019 / Accepted: 2 June 2019 / Published: 5 June 2019
(This article belongs to the Section Sensor Networks)
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PDF [4965 KB, uploaded 5 June 2019]
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Abstract

Cooperative communication improves the link throughput of wireless networks through spatial diversity. However, it reduces the frequency reuse of the entire network due to the enlarged link interference range introduced by each helper. In this paper, we propose a cooperative medium access control (MAC) protocol with optimal relay selection (ORS-CMAC) for multihop, multirate large scale networks, which can reduce the interference range and improve the network throughput. Then, we investigate the performance gain achieved by these two competitive factors, i.e., the spatial frequency reuse gain and spatial diversity gain, in large scale wireless networks. The expressions of maximum network throughput for direct transmissions and cooperative transmissions in the whole network are derived as a function of the number of concurrent transmission links, data packet length, and average packet transmission time. Simulation results validate the effectiveness of the theoretical results. The theoretical and simulation results show that the helper can reduce the spatial frequency reuse slightly, and spatial diversity gain can compensate for the decrease of the spatial frequency reuse, thereby improving the network throughput from the viewpoint of the whole network. View Full-Text
Keywords: large scale wireless networks; medium access control (MAC); cooperative MAC protocol; helper selection; spatial diversity gain; spatial frequency reuse gain large scale wireless networks; medium access control (MAC); cooperative MAC protocol; helper selection; spatial diversity gain; spatial frequency reuse gain
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Liu, K.; Wang, R.; Yue, C.; Liu, F.; Lu, T.; Xiong, Z. Interference Range-Reduced Cooperative Multiple Access with Optimal Relay Selection for Large Scale Wireless Networks. Sensors 2019, 19, 2565.

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