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Reputation-Based collaborative spectrum sensing Scheme in Cognitive Radio Networks

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Journal of Shanghai Jiaotong university(Science) 2011年第6期16卷 641-647页

作者：赵士康何迪李文化朱伏生 Department of Electronic Engineering Shanghai Jiaotong University ARCON Corporation Zhongxing Telecommunication Equipment Corporation

collaborative spectrum sensing is proposed to improve the detection performance in cognitive radio (CR) networks. However, most of the current collaborative sensing schemes are vulnerable to the interference of the malicious secondary users (SUs). In this paper we propose a reputation-based collaborative spectrum sensing scheme to improve the security of cooperative sensing by mitigating the impacts of misbehaviors. The fusion center calculates the reputation rating of each SU according to their history reports to weight their sensing results in the proposed scheme. We analyze and evaluate the performance of the proposed scheme and its advantages over previous schemes in expansibility and integrity. Simulation results show that the proposed scheme can minimize the harmful influence from malicious SUs.

关键词： cognitive radio (CR) collaborative spectrum sensing reputation-based scheme security

A collaborative spectrum sensing SCHEME USING FUZZY COMPREHENSIVE EVALUATION IN COGNITIVE RADIO

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Journal of Electronics(China) 2009年第3期26卷 326-331页

作者： Yang Wendong Ye Yuhuang Cai Yueming Xu Youyun Institute of Communications Engineering PLA University of Science and Technology Nanjing 210007 China Institute of Microwave Communication Fuzhou University Fuzhou 350002 China

Cognitive Radio(CR) is a promising technology to solve the challenging spectrum scarcity ***, to implement CR, spectrum sensing is the groundwork and the *** this paper, a collaborative spectrum sensing scheme using fuzzy comprehensive evaluation is *** final sensing decision of the proposed scheme is based on the combination of distributed sensing results of different Secondary Users(SUs).To improve the reliability of the sensing decision, the combination procedure takes into account the credibility of each SU, which is evaluated using fuzzy comprehensive *** effect of the presence of malicious SUs and malfunctioning SUs on the performance of the proposed scheme is also *** efficiency of the scheme is validated through analysis and simulation.

关键词： Cognitive Radio (CR) collaborative spectrum sensing Fuzzy comprehensive evaluation

A SPARSITY AND COMPRESSION RATIO JOINT ADJUSTMENT METHOD FOR collaborative spectrum sensing

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Journal of Electronics(China) 2012年第6期29卷 604-610页

作者： Chi Jingxiu Zhang Jianwu Xu Xiaorong College of Telecommunication Engineering Hangzhou Dianzi University Institute of Information and Communication Engineering Zhejiang University

spectrum sensing is the fundamental task for Cognitive Radio (CR). To overcome the challenge of high sampling rate in traditional spectral estimation methods, Compressed sensing (CS) theory is developed. A sparsity and compression ratio joint adjustment algorithm for compressed spectrum sensing in CR network is investigated, with the hypothesis that the sparsity level is unknown as priori knowledge at CR terminals. As perfect spectrum reconstruction is not necessarily required during spectrum detection process, the proposed algorithm only performs a rough estimate of sparsity level. Meanwhile, in order to further reduce the sensing measurement, different compression ratios for CR terminals with varying Signal-to-Noise Ratio (SNR) are considered. The proposed algorithm, which optimizes the compression ratio as well as the estimated sparsity level, can greatly reduce the sensing measurement without degrading the detection performance. It also requires less steps of iteration for convergence. Corroborating simulation results are presented to testify the effectiveness of the proposed algorithm for collaborative spectrum sensing.

关键词： collaborative spectrum sensing Sparsity level Compression ratio Joint adjustment method

Joint spectrum sensing and spectrum Access for Defending Massive SSDF Attacks:A Novel Defense Framework

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Chinese Journal of Electronics 2022年第2期31卷 240-254页

作者： XU Zhenyu SUN Zhiguo GUO Lili Muhammad Zahid Hammad Chintha Tellambura College of Information and Communication Engineering Harbin Engineering University Department of Electrical and Computer Engineering University of Alberta

Multiple secondary users(SUs) perform collaborative spectrum sensing(CSS) in cognitive radio networks to improve the sensing performance. However,this system severely degrades with spectrum sensing data falsification(SSDF) attacks from a large number of malicious secondary users, i.e., massive SSDF attacks. To mitigate such attacks, we propose a joint spectrum sensing and spectrum access framework. During spectrum sensing,each SU compares the decisions of CSS and independent spectrum sensing(IndSS), and then the reliable decisions are adopted as its final decisions. Since the transmission slot is divided into several tiny slots, at the stage of spectrum access, each SU is assigned with a specific tiny time slot. In accordance with its independent final spectrum decisions, each node separately accesses the tiny time *** results verify effectiveness of the proposed algorithm.

关键词： CSS cognitive radio telecommunication security multiple secondary users spectrum access framework independent final spectrum decisions signal detection sensing performance joint spectrum sensing massive SSDF attacks radio spectrum management collaborative spectrum sensing spectrum sensing data falsification attacks malicious secondary users independent spectrum sensing

Efficient Centralized Cooperative spectrum sensing Techniques for Cognitive Networks

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Computer Systems Science & Engineering 2023年第1期44卷 55-65页

作者： P.Gnanasivam G.T.Bharathy V.Rajendran T.Tamilselvi Department of Electronics and Communication Engineering Jerusalem College of EngineeringPallikaranaiChennai600100Tamil NaduIndia Department of Electronics and Communication Engineering Vels Institute of ScienceTechnology&Advanced StudiesPallavaramChennai600117Tamil NaduIndia

Wireless Communication is a system for communicating information from one point to other,without utilizing any connections like wire,cable,or other physical *** Radio(CR)based systems and networks are a revolutionary new perception in wireless *** sensing is a vital task of CR to avert destructive intrusion with licensed primary or main users and discover the accessible spectrum for the efficient utilization of the *** Cooperative spectrum sensing(CSS)is a kind of spectrum *** of the test metrics designed till now for sensing the spectrum is produced by using the Sample Covariance Matrix(SCM)of the received *** of the methods that use the SCM for the process of detection are Pietra-Ricci Index Detector(PRIDe),Hadamard Ratio(HR)detector,Gini Index Detector(GID),*** paper presents the simulation and comparative perfor-mance analysis of PRIDe with various other detectors like GID,HR,Arithmetic to Geometric Mean(AGM),Volume-based Detector number 1(VD1),Maximum-to-Minimum Eigenvalue Detection(MMED),and Generalized Likelihood Ratio Test(GLRT)using the MATLAB *** PRIDe provides better performance in the presence of variations in the power of the signal and the noise power with less computational complexity.

关键词： Cohnitive radio network collaborative spectrum sensing sample covariance matrix pietra-ricci index detector cooperative spectrum sensing generalized likelihood ratio test maximum-to-minimum eigenvalue detection volume-based detector number