DocumentCode :
3766623
Title :
Performance analysis of secure buffer-aided cognitive radio network
Author :
Aiwei Sun;Tao Liang;Yajun Zhang
Author_Institution :
Institute of Communications Engineering, PLA University of Science & Technology, Nanjing, China
fYear :
2015
Firstpage :
1
Lastpage :
4
Abstract :
The paper investigates a buffer-aided relay selection scheme for an underlay cognitive radio network in the presence of an eavesdropper. Eavesdropper can intercept the information transmission from the secondary source or the relay to the corresponding receiver. Relay is equipped with a buffer of finite buffer size so that it can store packets. We propose a max-ratio secure link selection scheme which can optimize the secrecy transmission performance by selecting the link which maximizes the secrecy capacity. 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. A closed-form expression for the secrecy outage probability is obtained based on the Markov chain to validate the proposed scheme. Simulation and theoretical results demonstrate that the proposed scheme can significantly enhance the secure performance compared to the conventional max-min-ratio secure relay selection schemes.
Keywords :
"Relays","Cognitive radio","Security","Receivers","Communication system security","Interference"
Publisher :
ieee
Conference_Titel :
Communications in China (ICCC), 2015 IEEE/CIC International Conference on
Type :
conf
DOI :
10.1109/ICCChina.2015.7448612
Filename :
7448612
Link To Document :
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