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Open AccessArticle

Secure Communication for Uplink Cellular Networks Assisted with Full-Duplex Device-to-Device User

by Xin Song 1,2, Lin Xia 1,2,*, Siyang Xu 1,2 and Yue Wang 1,2
1
Engineering Optimization and Smart Antenna Institute, Northeastern University, Qinhuangdao 066004, China
2
School of Computer Science and Engineering, Northeastern University, Shenyang 110819, China
*
Author to whom correspondence should be addressed.
Future Internet 2020, 12(10), 175; https://doi.org/10.3390/fi12100175
Received: 26 September 2020 / Revised: 12 October 2020 / Accepted: 16 October 2020 / Published: 18 October 2020
(This article belongs to the Section Cybersecurity)
In this paper, the secure communication based on the full-duplex (FD) device-to-device (D2D) in cellular networks is proposed. For the proposed scheme, the novel model is established, in which a D2D user is played as a relay operating in FD mode to assist in the secure transmission of uplink information. Considering that the D2D user as a relay is untrusted, D2D link rate maximization is formulated with the constraint of secrecy rate, which ensures the security of uplink cellular networks. To cope with the optimization problem, the optimal power allocation factors of the cellular user (CU) and the D2D user are jointly optimized. Firstly, by using the monotonicity of the objective function, the optimal solution of the power allocation factor at the D2D user can be obtained. Subsequently, the closed-form expression of the optimal power allocation factor at the CU is derived and verified that the solution is the global minimum point. Simulation results verify that the proposed scheme has better output performance than the conventional scheme.
Keywords: D2D communication; FD untrusted relay; physical layer security; power allocation D2D communication; FD untrusted relay; physical layer security; power allocation
MDPI and ACS Style

Song, X.; Xia, L.; Xu, S.; Wang, Y. Secure Communication for Uplink Cellular Networks Assisted with Full-Duplex Device-to-Device User. Future Internet 2020, 12, 175.

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