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Sensors 2017, 17(5), 1128; doi:10.3390/s17051128

Simultaneous Wireless Power Transfer and Secure Multicasting in Cooperative Decode-and-Forward Relay Networks

1
Department of Electronic Engineering, Gachon University, Seongnam, Gyeonggi 13120, Korea
2
Department of Computer Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
3
Department of Electronic Engineering, Myongji University, Yongin, Gyeonggi 17058, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard M. Reindl
Received: 3 March 2017 / Revised: 3 May 2017 / Accepted: 12 May 2017 / Published: 16 May 2017
(This article belongs to the Special Issue Wireless Rechargeable Sensor Networks)
View Full-Text   |   Download PDF [290 KB, uploaded 16 May 2017]   |  

Abstract

In this paper, we investigate simultaneous wireless power transfer and secure multicasting via cooperative decode-and-forward (DF) relays in the presence of multiple energy receivers and eavesdroppers. Two scenarios are considered under a total power budget: maximizing the minimum harvested energy among the energy receivers under a multicast secrecy rate constraint; and maximizing the multicast secrecy rate under a minimum harvested energy constraint. For both scenarios, we solve the transmit power allocation and relay beamformer design problems by using semidefinite relaxation and bisection technique. We present numerical results to analyze the energy harvesting and secure multicasting performances in cooperative DF relay networks. View Full-Text
Keywords: physical layer security; secure multicasting; wireless power transfer; relay networks physical layer security; secure multicasting; wireless power transfer; relay networks
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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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Lee, J.-H.; Sohn, I.; Kim, Y.-H. Simultaneous Wireless Power Transfer and Secure Multicasting in Cooperative Decode-and-Forward Relay Networks. Sensors 2017, 17, 1128.

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