NDLI: Secure performance analysis of buffer-aided cognitive relay networks

Content Provider	IEEE Xplore Digital Library
Author	Aiwei Sun Tao Liang Yajun Zhang
Copyright Year	2015
Description	Author affiliation: Inst. of Commun. Eng., Univ. of Sci. & Technol., Nanjing, China (Aiwei Sun; Yajun Zhang) \|\| Technol. Inst., Nanjing Telecommun., Nanjing, China (Tao Liang)
Abstract	The paper investigates a decode-and-forward buffer-aided relay selection for an underlay cognitive radio network in the presence of an eavesdropper. The secondary users operating on the same band used by primary user, so the QoS of primary user should be guaranteed. Eavesdropper can intercept the information transmission from the secondary transmitter or relay to the corresponding receiver, which is considered to threaten the security of cognitive radio networks. Finite buffer size is assumed to be available at the relay, so that the relay can store packets. We propose a max-ratio link selection scheme which can optimize the secrecy transmission performance by considering all possible source-to relay and relay to destination links and selecting the relay having the link which maximizes the signal to eavesdropper channel gain ratio. It incorporates the instantaneous strength of the wireless links as well as the status of the finite relay buffers and adapts the relay selection decision on the strongest available link by dynamically switching between relay reception and transmission, so it can take full advantage of the additional flexibility offered by relays with buffers. A closed-form expression for the secrecy outage probability is obtained, both simulation and theoretical results are shown based on the Markov chain to validate the proposed schemes and demonstrate that the proposed schemes can significantly enhance the secure performance compared to the conventional Max-min relay selection schemes.
Starting Page	490
Ending Page	495
File Size	554956
Page Count	6
File Format	PDF
ISBN	9781467381253
e-ISBN	9781467381260
DOI	10.1109/CompComm.2015.7387621
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Secrecy outage probability Receivers Interference Physical layer security Buffer-aided relay Cognitive radio Security Communication system security Relays
Content Type	Text
Resource Type	Article

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