Abstract
This paper studies the relay selection schemes in mobile communication system over Nakagami-m channel. To make efficient use of licensed spectrum, both single relay selection (SRS) scheme and multirelays selection (MRS) scheme over the Nakagami-m channel are proposed. Also, the intercept probability (IP) and outage probability (OP) of the proposed SRS and MRS for the communication links depending on realistic spectrum sensing are derived. Furthermore, this paper assesses the manifestation of conventional direct transmission scheme to compare with the proposed SRS and MRS ones based on the Nakagami-m channel, and the security-reliability trade-off (SRT) performance of the proposed schemes and the conventional schemes is well investigated. Additionally, the SRT of the proposed SRS and MRS schemes is demonstrated better than that of direct transmission scheme over the Nakagami-m channel, which can protect the communication transmissions against eavesdropping attacks. Additionally, simulation results show that our proposed relay selection schemes achieve better SRT performance than that of conventional direct transmission over the Nakagami-m channel.
Highlights
Cognitive radio (CR) [1] is considered as one of the most promising technologies to significantly improve spectrum utilization [2]
It is of great significance to enhance the security-reliability trade-off (SRT) [7] performance based on the CR network
We set the initial signalto-noise ratio (SNR) γp as 10 dB and data rate is employed as R = 1 bit/s/Hz in this simulation
Summary
Cognitive radio (CR) [1] is considered as one of the most promising technologies to significantly improve spectrum utilization [2]. Relays selection schemes over the Rayleigh fading channel were proposed to improve the SRT performance of the CR networks [16]. The Nakagami-m channel is more accordant with channel characteristics in realistic communication systems compared with that of Rayleigh fading channel and Ricean channel It is widely used for modeling wireless fading channels, including Rayleigh and the one-sided Gaussian distribution as special cases [17,18,19]. Different from [16], we propose a scenario that investigates the SRT performance over the Nakagami-m channel, which can better capture the characteristics of the physical channel [20,21,22,23]. Relay selection schemes in mobile communication systems over the Nakagami-m channel are well investigated, and mathematical SRT analysis of the proposed SRS and MRS schemes over the Nakagami-m channel is first provided.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
