In this paper, we enhance physical layer security for downlink heterogeneous networks (HetNets) 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 (PHP). 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.
@article{arxiv.1709.06294,
title = {Physical Layer Security in Heterogeneous Networks with Jammer Selection and Full-Duplex Users},
author = {Weijun Tang and Suili Feng and Yuehua Ding and Yuan Liu},
journal= {arXiv preprint arXiv:1709.06294},
year = {2017}
}
Comments
13 pages, 12 figures. Accepted for publication at the IEEE Transactions on Wireless Communications