Title: Analysis of outage probability and optimising secrecy capacity in physical layer security based on wireless cooperative relay networks

Authors: Nabila Sehito; Shouyi Yang; Raja Sohail Ahmed Larik; Ghulam Raza; Safi Ullah

Addresses: School of Information Engineering, Zhengzhou University, 100, Science Avenue, Zhengzhou, 450001, China; Department of Computer Science, Ilma University Karachi, Sindh 74900, Pakistan ' School of Information Engineering, Zhengzhou University, 100, Science Avenue, Zhengzhou, 450001, China ' Department of Computer Science, Ilma University Karachi, Sindh 74900, Pakistan; School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China ' Department of Electronics, Quaid-i-Azam University Islamabad, Pakistan ' Department of Software Engineering, Mehran Engineering University, Pakistan

Abstract: This paper examines cooperative relay networks for physical layer security, utilising amplify-and-forward (AF) and decode-and-forward (DF) protocols in the system. We looked at how likely it is that the hybrid decode and forward (HYDF) wireless cooperative relay network would go down and discovered that the proposed DPSBR scheme does better than the SPSBR scheme in terms of both OP and SOP. The relay nodes serve as reliable and collaborative entities that enhance the security and dependability of the communication system. Mathematical models precisely predict outage probability based on system parameters, including transmit power, channel conditions, and the number of relay nodes. The analytical results provide valuable insights into the security performance of the cooperative relay network, with a focus on physical layer security. However, in a single relay environment, we incorporate distance parameters and path loss exponents. Our proposed model outperforms the AF-DF. OP-SOP schemes concerning, secrecy capacity and analysis have been verified for accuracy through Monte Carlo simulations.

Keywords: cooperative communication; amplifies and forward; physical layer; decoder and forwarder; secrecy rate; outage probability; full duplex mood.

DOI: 10.1504/IJICS.2025.145119

International Journal of Information and Computer Security, 2025 Vol.26 No.1/2, pp.159 - 177

Received: 24 Jan 2024
Accepted: 16 Oct 2024
Published online: 19 Mar 2025 *

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