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TIIS (한국인터넷정보학회)

Current Result Document : 4 / 4

한글제목(Korean Title) Supporting Trusted Soft Decision Scheme Using Volatility Decay in Cooperative Spectrum Sensing
영문제목(English Title) Supporting Trusted Soft Decision Scheme Using Volatility Decay in Cooperative Spectrum Sensing
저자(Author) Peng Lan   Lizhen Chen1   Guowei Zhang   Fenggang Sun   Feng Zhao   Jingyu Feng  
원문수록처(Citation) VOL 10 NO. 05 PP. 2067 ~ 2080 (2016. 05)
한글내용
(Korean Abstract)
영문내용
(English Abstract)
Cooperative spectrum sensing (CSS) for vacant licensed bands is one of the key techniques in cognitive radio networks. Currently, sequential probability ratio test scheme (SPRT) is considered as a powerful soft decision approach to improve the sensing result for CSS. However, SPRT assumes all secondary users (SU) are honest, and thus offering opportunities for malicious SUs to launch the spectrum sensing data falsification attack (SSDF attack). To combat such misbehaved behaviors, recent efforts have been made to trust mechanism. In this paper, we argue that powering SPRT with traditional trust mechanism is not enough. Dynamic SSDF attackers can maintain high trust in an alternant process of submitting honest or false sensing data, resulting in difficultly detecting them. Noting that the trust value of dymamic SSDF attackers behave highly volatile, a novel trusted SPRT scheme (VSPRT) based on volatility decay analysis is proposed in this paper to mitigate the harmful effect of dynamic SSDF attackers in the process of the soft-decision data fusion, and thus improving the accuracy of the final sensing result. Simulation results show that the VSPRT scheme outperforms the conventional SPRT schemes.
키워드(Keyword) cognitive radio   Relay networks   non-orthogonal cooperative protocol   power allocation   relay selection   channel capacity   cognitive radio   cooperative spectrum sensing   soft decision   security  
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