Relay Selection Schemes for Dual-Hop Networks under Security Constraints with Multiple Eavesdroppers

IEEE Transactions on Wireless Communications - Tập 12 Số 12 - Trang 6076-6085 - 2013
Vo Nguyen Quoc Bao1, Nguyen Linh-Trung2, Merouane Debbah3
1Department of Telecommunications, Posts and Telecommunications Institute of Technology, Ho Chi Minh City, Vietnam
2Faculty of Electronics and Telecommunications, Vietnam National University, Hanoi, Vietnam
3Alcatel-Lucent Chair on Flexible Radio, SUPELEC, Gif-sur-Yvette, France

Tóm tắt

In this paper, we study opportunistic relay selection in cooperative networks with secrecy constraints, where a number of eavesdropper nodes may overhear the source message. To deal with this problem, we consider three opportunistic relay selection schemes. The first scheme tries to reduce the overheard information at the eavesdroppers by choosing the relay having the lowest instantaneous signal-to-noise ratio (SNR) to them. The second scheme is conventional selection relaying that seeks the relay having the highest SNR to the destination. In the third scheme, we consider the ratio between the SNR of a relay and the maximum among the corresponding SNRs to the eavesdroppers, and then select the optimal one to forward the signal to the destination. The system performance in terms of probability of non-zero achievable secrecy rate, secrecy outage probability and achievable secrecy rate of the three schemes are analyzed and confirmed by Monte Carlo simulations.

Từ khóa

#Rayleigh fading #security constraints #achievable secrecy rate #secrecy outage probability #Shannon capacity #relay selection

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Thông tin
Thông tin xuất bản

IEEE Transactions on Wireless Communications

Tập 12 Số 12

6076-6085

Thông tin tác giả