End-to-end security-reliability analysis of multi-hop cognitive relaying protocol with TAS/SC-based primary communication, total interference constraint and asymmetric fading channels

Received: 10 November 2017 Revised: 28 September 2018 Accepted: 18 October 2018

DOI: 10.1002/dac.3854

RESEARCH ARTICLE

End-to-end security-reliability analysis of multi-hop

cognitive relaying protocol with TAS/SC-based primary

communication, total interference constraint and

asymmetric fading channels

Pham Minh Nam1,2 Tran Trung Duy3 Phan Van Ca1

1Faculty of Electrical and Electronics

Engineering, HCMC University of

Technology and Education, Ho Chi Minh

City, Vietnam

2Faculty of Electronics Technology,

Industrial University of Ho Chi Minh City,

Ho Chi Minh City, Vietnam

3Department of Telecommunications, Ho

Chi Minh City, Vietnam

Correspondence

Tran Trung Duy, Department of

Telecommunications, Posts and

Telecommunications Institute of

Technology (PTIT), 11 Nguyen Dinh

Chieu, Ho Chi Minh City, Vietnam.

Email: [email protected]

Funding information

National Foundation for Science and

Technology Development , Grant/Award

Number: 102.04-2017.317

Summary

In this paper, we analyze the tradeoff between outage probability (OP) and

intercept probability (IP) for a multi-hop relaying scheme in cognitive radio

(CR) networks. In the proposed protocol, a multi-antenna primary transmitter

(PT) communicates with a multi-antenna primary receiver (PR), using transmit

antenna selection (TAS) / selection combining (SC) technique, while a sec￾ondary source attempts to transmit its data to a secondary destination via a

multi-hop approach in presence of a secondary eavesdropper. The secondary

transmitters such as source and relays have to adjust their transmit power to

satisfy total interference constraint given by PR. We consider an asymmetric fad￾ing channel model, where the secondary channels are Rician fading, while the

remaining ones experience the Rayleigh fading. Moreover, an optimal interfer￾ence allocation method is proposed to minimize OP of the primary network. For

the secondary network, we derive exact expressions of end-to-end OP and IP

which are verified by Monte Carlo simulations.

KEYWORDS

asymmetric fading channels, cognitive radio, multi-hop relaying protocol, security-reliability

analysis

1 INTRODUCTION

To solve the spectrum scarcity issue in wireless communication networks, cognitive radio (CR)1,2 has been proposed to

increase the spectrum efficiency. In CR, licensed users (primary users) share licensed bands to unlicensed users (sec￾ondary users), follows underlay, overlay, or interweave scenario.3 Among these methods, underlay spectrum sharing can

guarantee the continuous data transmission for the secondary network.4-6 However, the secondary transmitters operat￾ing on the underlay model must adjust their transmit power to satisfy the interference constraint given by the primary

receivers. With the limited transmit power, cooperative relay protocols7,8 can be employed to improve performance of

the secondary systems. Particularly, the authors in9,10 proposed and analyzed outage performance of dual-hop cognitive

amplify-and-forward (AF) relay networks over independent non-identically distributed (INID) Rayleigh and Nakagami-m

fading channels, respectively. Dual-hop cooperative cognitive decode-and-forward (DF) protocols with relay selection

methods were investigated in.11,12 The authors of13 studied outage performance of cognitive cooperative networks in

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https://doi.org/10.1002/dac.3854