naa a22 4500 510792332 CHVBK 20180411083324.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11277-012-0943-5 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0943-5 Fault-Tolerant Cooperative Spectrum Sensing Scheme for Cognitive Radio Networks [Elektronische Daten] [Huifang Chen, Ming Zhou, Lei Xie, Xu Jin] In order to solve the uncertainty resulting from shadowing effect and resist the attack from malicious cognitive radio (CR) users, we propose a fault-tolerant cooperative spectrum sensing scheme for CR networks, where an energy detection-based local spectrum sensing is performed at each CR user, a coefficient is used to weight each CR user's sensing result, a linear weighted fusion process is performed at the fusion center (FC) to combine received sensing results. For a fault-tolerant cooperative spectrum sensing scheme, the most important issue is to distinguish whether the CR user is reliable or not. In this paper, a reputation-based cooperative mechanism is presented to alleviate the influence of the unreliable sensing results from CR users suffering shadowing and the false sensing data from malicious CR users on the detection result at the FC. In proposed fault-tolerant cooperative scheme, each cooperative CR user has a reputation degree which is initialized and adjusted by the FC and used to weight the sensing result from the corresponding user in the fusion process at the FC. And then, two reputation degree adjusting methods are presented to manage the reputation degree of each CR user. Simulation results show that the proposed scheme can not only weaken the harmful influence caused by malicious CR users, but also alleviate the corrupted detection problem resulting from destructive channel condition between the primary transmitter and the CR user. Moreover, the detection performance of the fault-tolerant cooperative scheme, which has a feasible computational complexity and needs no instantaneous SNRs, is close to that of the optimal scheme. Springer Science+Business Media New York, 2012 Cognitive radio networks nationallicence Cooperative spectrum sensing nationallicence Fault-tolerant nationallicence Reputation nationallicence Chen Huifang Department of Information Science and Electronic Engineering, Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut Zhou Ming Department of Information Science and Electronic Engineering, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut Xie Lei Department of Information Science and Electronic Engineering, Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut Jin Xu Department of Information Science and Electronic Engineering, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/4(2013-08-01), 2379-2397 0929-6212 71:4<2379 2013 71 11277 https://doi.org/10.1007/s11277-012-0943-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0943-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen Huifang Department of Information Science and Electronic Engineering, Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhou Ming Department of Information Science and Electronic Engineering, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Xie Lei Department of Information Science and Electronic Engineering, Zhejiang Provincial Key Laboratory of Information Network Technology, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Jin Xu Department of Information Science and Electronic Engineering, Zhejiang University, No. 38, Zheda Road, 310027, Hangzhou, People's Republic of China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/4(2013-08-01), 2379-2397 0929-6212 71:4<2379 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer