Double Threshold based Optimal Device Selection Scheme for D2D or Sidelink Network

TL;DR

This paper introduces a double threshold-based device selection scheme for D2D networks that improves spectral efficiency and physical layer security, demonstrating significant BER performance gains and enhanced security in various scenarios.

Contribution

The paper proposes a novel double threshold-based device selection scheme that optimizes device choice for improved security and spectral efficiency in D2D communications.

Findings

Achieves over 4 dB performance gain at BER of 0.004 compared to existing schemes.

Enhances physical layer security in D2D networks.

Effective across different distance, device, and modulation scenarios.

Abstract

Device-to-device (D2D) or Sidelink aided communication is regarded as one of the most promising technologies to improve the spectral efficiency of the 5G and beyond communication system. However, two main challenges exist: 1) the selection of the optimal number of devices for improving the spectral efficiency, and 2) improving the physical layer security of such a communication system. The optimal device improves the secrecy capacity, and the selection of optimal devices enhances the physical layer security. Therefore, in this paper, we propose a double threshold-based optimal device selection (ODS) scheme for a cooperative wireless network with amplify and forward (AF) protocol in the presence and absence of an eavesdropper to enhance the physical layer security for the D2D network. The proposed scheme is analyzed with different distance cases, device scenarios, and modulation schemes. The bit error rate (BER) performance analysis concludes that a performance gain of more than 4 dB is achieved at the BER of 0:004 for the proposed double threshold-based ODS scheme compared to the existing ODS scheme at a high signal to noise ratio (SNR). Furthermore, the proposed scheme enhances the physical layer security.