Security-reliability analysis in uplink cognitive satellite-terrestrial networks with LEO relaying

IF 4.4 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Computer Networks Pub Date : 2025-04-10 DOI:10.1016/j.comnet.2025.111272

Peng Zhang , Qing Guo

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Abstract

This paper investigates the security and reliability performance of hybrid cognitive satellite-terrestrial networks employing a Low Earth Orbit (LEO) satellite as a decode-and-forward (DF) relay. The terrestrial user (TU) operates within an underlay cognitive radio (CR) network, where the primary user (PU) shares its spectrum with the TU while imposing interference power constraints to protect its quality-of-service. To counteract eavesdropping from a terrestrial adversary, the TU incorporates artificial noise (AN) into its transmission, creating a tradeoff between security and reliability. The TU-to-LEO and TU-to-PU links are modeled using Shadowed Rician and Nakagami-

m

fading, respectively. Key performance metrics, including the outage probability (OP) and intercept probability (IP), are analyzed under varying system parameters such as power-splitting factor, channel conditions, and interference thresholds. Analytical results are validated through Monte Carlo simulations, and simplified approximations are presented for practical implementation. Results demonstrate the efficacy of the proposed approach in balancing security and reliability.

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基于LEO中继的上行认知星地网络安全可靠性分析

本文研究了采用低地球轨道卫星作为译码转发中继的混合认知卫星-地面网络的安全性和可靠性。地面用户（TU）在底层认知无线电（CR）网络中运行，其中主用户（PU）与TU共享其频谱，同时施加干扰功率限制以保护其服务质量。为了抵消来自地面对手的窃听，TU在其传输中加入了人工噪声（AN），在安全性和可靠性之间进行了权衡。TU-to-LEO和TU-to-PU链路分别使用阴影专家和Nakagami-m衰落建模。关键性能指标，包括中断概率（OP）和拦截概率（IP），在不同的系统参数下进行分析，如功率分割系数、信道条件和干扰阈值。通过蒙特卡罗模拟对分析结果进行了验证，并给出了简化的近似方法以供实际应用。结果证明了该方法在平衡安全性和可靠性方面的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computer Networks 工程技术-电信学

CiteScore

10.80

自引率

3.60%

发文量

434

审稿时长

8.6 months

期刊介绍： Computer Networks is an international, archival journal providing a publication vehicle for complete coverage of all topics of interest to those involved in the computer communications networking area. The audience includes researchers, managers and operators of networks as well as designers and implementors. The Editorial Board will consider any material for publication that is of interest to those groups.