Physical Layer Security Scheme Based on Base Station Cooperation in Dense Heterogeneous Networks

Abstract Physical layer security of non-orthogonal multiple access (NOMA) system which uses simultaneous wireless information and power transfer (SWIPT) technique is deeply dicussed in this paper. Generally, eavesdropper in the downlink of NOMA system may use successive interference cancellation technology (SIC) to obtain the secrecy information of receiver. To tackle this problem, we propose a physical layer security scheme to minimize the transmit power of the base station (BS) while the secrecy rates of receivers are guaranteed. Moreover, semidefinite relaxation (SDR) method and successive convex approximation (SCA) technique are combined to solve above non-convex problem. Simulation results show that in comparison with other methods, our method can effectively reduce the transmit power of the BS.

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A multicarrier-based physical layer security scheme for the multicast systems

2013 IEEE Third International Conference on Information Science and Technology (ICIST) ◽

10.1109/icist.2013.6747839 ◽

2013 ◽

Cited By ~ 4

Author(s):

Tong Lin ◽

Kai-Zhi Huang ◽

Wen-Yu Luo

Keyword(s):

Physical Layer Security ◽

Physical Layer ◽

Security Scheme

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Physical layer security transmission scheme based on artificial noise in cooperative SWIPT NOMA system

EURASIP Journal on Wireless Communications and Networking ◽

10.1186/s13638-021-02020-3 ◽

2021 ◽

Vol 2021 (1) ◽

Author(s):

Yong Jin ◽

Zhentao Hu ◽

Dongdong Xie ◽

Guodong Wu ◽

Lin Zhou

Keyword(s):

Interference Cancellation ◽

Physical Layer Security ◽

High Energy ◽

Physical Layer ◽

Base Station ◽

Artificial Noise ◽

Transmitted Power ◽

Transmission Scheme ◽

Convex Problem ◽

Security Problem

AbstractAiming at high energy consumption and information security problem in the simultaneous wireless information and power transfer (SWIPT) multi-user wiretap network, we propose a user-aided cooperative non-orthogonal multiple access (NOMA) physical layer security transmission scheme to minimize base station (BS) transmitted power in this paper. In this scheme, the user near from BS is adopted as a friendly relay to improve performance of user far from BS. An energy harvesting (EH) technology-based SWIPT is employed at the near user to collect energy which can be used at cooperative stage. Since eavesdropper in the downlink of NOMA system may use successive interference cancellation (SIC) technology to obtain the secrecy information of receiver, to tackle this problem, artificial noise (AN) is used at the BS to enhance security performance of secrecy information. Moreover, semidefinite relaxation (SDR) method and successive convex approximation (SCA) technique are combined to solve the above non-convex problem. Simulation results show that in comparison with other methods, our method can effectively reduce the transmitted power of the BS on the constraints of a certain level of the secrecy rates of two users.

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Physical-Layer Security Improvement with Reconfigurable Intelligent Surfaces for 6G Wireless Communication Systems

Sensors ◽

10.3390/s21041439 ◽

2021 ◽

Vol 21 (4) ◽

pp. 1439

Author(s):

Janghyuk Youn ◽

Woong Son ◽

Bang Chul Jung

Keyword(s):

Wireless Communication ◽

Physical Layer Security ◽

Communication Systems ◽

Low Cost ◽

Physical Layer ◽

Base Station ◽

Wireless Communication Systems ◽

Secrecy Rate ◽

Pilot Signal ◽

Time Division

Recently, reconfigurable intelligent surfaces (RISs) have received much interest from both academia and industry due to their flexibility and cost-effectiveness in adjusting the phase and amplitude of wireless signals with low-cost passive reflecting elements. In particular, many RIS-aided techniques have been proposed to improve both data rate and energy efficiency for 6G wireless communication systems. In this paper, we propose a novel RIS-based channel randomization (RCR) technique for improving physical-layer security (PLS) for a time-division duplex (TDD) downlink cellular wire-tap network which consists of a single base station (BS) with multiple antennas, multiple legitimate pieces of user equipment (UE), multiple eavesdroppers (EVEs), and multiple RISs. We assume that only a line-of-sight (LOS) channel exists among the BS, the RISs, and the UE due to propagation characteristics of tera-hertz (THz) spectrum bands that may be used in 6G wireless communication systems. In the proposed technique, each RIS first pseudo-randomly generates multiple reflection matrices and utilizes them for both pilot signal duration (PSD) in uplink and data transmission duration (DTD) in downlink. Then, the BS estimates wireless channels of UE with reflection matrices of all RISs and selects the UE that has the best secrecy rate for each reflection matrix generated. It is shown herein that the proposed technique outperforms the conventional techniques in terms of achievable secrecy rates.

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