Physical Layer Security in Heterogeneous Networks With Jammer Selection and Full-Duplex Users

In this paper, we enhance physical layer security for downlink heterogeneous networks by using friendly jammers and full-duplex users. The jammers are selected to transmit jamming signal if their interfering power on the scheduled users is below a threshold, meanwhile the scheduled users confound th...

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Bibliographic Details
Published inIEEE transactions on wireless communications Vol. 16; no. 12; pp. 7982 - 7995
Main Authors Tang, Weijun, Feng, Suili, Ding, Yuehua, Liu, Yuan
Format Journal Article
LanguageEnglish
Published IEEE 01.12.2017
Subjects
Fading channels
full-duplex
heterogeneous networks
Interference
Jamming
Network security
Physical layer
Physical layer security
poisson hole process
stochastic geometry
Wireless communication
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Summary:In this paper, we enhance physical layer security for downlink heterogeneous networks by using friendly jammers and full-duplex users. The jammers are selected to transmit jamming signal if their interfering power on the scheduled users is below a threshold, meanwhile the scheduled users confound the eavesdroppers using artificial noise by full-duplexing. Using the tools of stochastic geometry, we derive the expressions of connection probability and secrecy probability. In particular, the locations of active jammers are modeled by a modified Poisson hole process. Determining the jammer selection threshold is further investigated for connection probability maximization subject to the security constraints. A greedy algorithm is proposed to efficiently solve this problem. The accuracy of the theoretical analysis and the efficiency of the proposed algorithm are evaluated by numerical simulations.
ISSN:1536-1276
DOI:10.1109/TWC.2017.2755640