Opportunistic relay selection improves reliability–reliability tradeoff and security–reliability tradeoff in random cognitive radio networks

• DOI: 10.1049/iet-com.2016.0702
• Publication Date: 2016-09-21T17:43:18Z
• Authors: Xiaoming Xu; Weiwei Yang; Yueming Cai
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

This study investigates the physical-layer security in random cognitive radio network (CRN) consisting of randomly distributed primary nodes, secondary relay nodes and eavesdroppers, where share spectrum eavesdroppers attempt to intercept transmissions. The authors develop a framework analysis reliability–reliability tradeoff (RRT) security–reliability (SRT) CRNs, reliability are quantified terms secrecy outage probability connection probability. RRT evaluates performance between networks SRT inside network. Furthermore, they propose an opportunistic selection (ORS) scheme enhance confidential transmission. It is demonstrated that ORS significantly improves as density relays increases, outperforms conventional direct transmission when larger than certain value. actually promotes understandings tradeoffs provides insights on system design for practical CRNs.