Security-Reliability Tradeoff for Friendly Jammer Aided Multiuser Scheduling in Energy Harvesting Communications

Xiao Jiang,Peng Li,Bin Li,Ruchuan Wang,Yulong Zou,Savio Sciancalepore

doi:10.1155/2021/5599334

Abstract

In this paper, we investigate the physical-layer security in an energy-harvesting (EH) multiuser network with the help of a friendly jammer (J), where multiple eavesdroppers are considered to tap the information transmission from users (Us) to base station (BS). In this system, a power beacon (PB) transmits radio frequency (RF) signals to Us for charging. In order to enhance the security of wireless transmission, we propose non-energy-aware multiuser scheduling (NEAMUS) scheme and energy-aware multiuser scheduling (EAMUS) scheme. For the purpose of comparison, we introduce conventional round robin multiuser scheduling (CRRMUS) scheme. The closed-form outage probability (OP) and intercept probability (IP) expressions of NEAMUS, EAMUS, and CRRMUS schemes are derived over Rayleigh fading channels. Additionally, we analyze the security-reliability tradeoff (SRT) of NEAMUS, EAMUS, and CRRMUS schemes in terms of OP and IP. Numerical results show that the proposed EAMUS scheme is superior to the CRRMUS scheme and NEAMUS scheme in terms of SRT, demonstrating the advantage of the proposed EAMUS scheme in improving the physical-layer security and reliability. Moreover, SRT performance of NEAMUS and EAMUS schemes can also be improved by increasing the number of users.

Highlights

We study the physical-layer security for a multiuser Energy harvesting (EH) wireless network consisting of multiple EH users (Us) in the face of multiple eavesdroppers (Es), where the Us, powered by a dedicated power beacon (PB), communicate with a base station (BS) with the help of a friendly jammer (J)
The Es and BS are equipped with multiple antennas. e main contributions of this paper can be summarized as follows: (i) We propose the non-energy-aware multiuser scheduling (NEAMUS) scheme and energy-aware multiuser scheduling (EAMUS) scheme in EH wireless network to protect the secure transmission of information from Us to BS
Given a special outage probability (OP) value, the intercept probability (IP) of the conventional round robin multiuser scheduling (CRRMUS), NEAMUS, and EAMUS schemes decreases with the increase of MER. at is to say, the physical-layer security of the proposed EH network can be effectively improved by increasing MER

Summary

Introduction

We present the non-energy-aware multiuser scheduling (NEAMUS) scheme, in which the user maximizing CSI of the main link will be selected to send messages. 3. Security and Reliability Analysis over Rayleigh Fading Channels is section provides the SRT performance analysis for NEAMUS and EAMUS schemes in terms of OP versus IP.

Results

Conclusion