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Sensors 2017, 17(2), 377; doi:10.3390/s17020377

Performance Analysis of Physical Layer Security of Opportunistic Scheduling in Multiuser Multirelay Cooperative Networks

1
Graduate School of Smart City Science Management, Hongik University, Seoul 30016, Korea
2
Department of Electronics and Computer Engineering, Hongik University, Seoul 30016, Korea
3
Department of Computer and Information Communications Engineering, Hongik University, Seoul 30016, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 6 December 2016 / Revised: 25 January 2017 / Accepted: 8 February 2017 / Published: 15 February 2017
(This article belongs to the Section Sensor Networks)
View Full-Text   |   Download PDF [365 KB, uploaded 15 February 2017]   |  

Abstract

In this paper, we study the physical layer security (PLS) of opportunistic scheduling for uplink scenarios of multiuser multirelay cooperative networks. To this end, we propose a low-complexity, yet comparable secrecy performance source relay selection scheme, called the proposed source relay selection (PSRS) scheme. Specifically, the PSRS scheme first selects the least vulnerable source and then selects the relay that maximizes the system secrecy capacity for the given selected source. Additionally, the maximal ratio combining (MRC) technique and the selection combining (SC) technique are considered at the eavesdropper, respectively. Investigating the system performance in terms of secrecy outage probability (SOP), closed-form expressions of the SOP are derived. The developed analysis is corroborated through Monte Carlo simulation. Numerical results show that the PSRS scheme significantly improves the secure ability of the system compared to that of the random source relay selection scheme, but does not outperform the optimal joint source relay selection (OJSRS) scheme. However, the PSRS scheme drastically reduces the required amount of channel state information (CSI) estimations compared to that required by the OJSRS scheme, specially in dense cooperative networks. View Full-Text
Keywords: physical layer security; opportunistic scheduling; cooperative relaying transmissions; maximal ratio combining; selection combining; secrecy outage probability physical layer security; opportunistic scheduling; cooperative relaying transmissions; maximal ratio combining; selection combining; secrecy outage probability
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MDPI and ACS Style

Shim, K.; Do, N.T.; An, B. Performance Analysis of Physical Layer Security of Opportunistic Scheduling in Multiuser Multirelay Cooperative Networks. Sensors 2017, 17, 377.

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