1 research outputs found
Artificial Interference Aided Physical Layer Security in Cache-enabled Heterogeneous Networks
Caching popular contents is a promising way to offload the mobile data
traffic in wireless networks, but so far the potential advantage of caching in
improving physical layer security (PLS) is rarely considered. In this paper, we
contribute to the design and theoretical understanding of exploiting the
caching ability of users to improve the PLS in a wireless heterogeneous network
(HetNet). In such network, the base station (BS) ensures the secrecy of
communication by utilizing some of the available power to transmit a pre-cached
file, such that only the eavesdropper's channel is degraded. Accordingly, the
node locations of BSs, users and eavesdroppers are first modeled as mutually
independent poisson point processes (PPPs) and the corresponding file access
protocol is developed. We then derive analytical expressions of two metrics,
average secrecy rate and secrecy coverage probability, for the proposed system.
Numerical results are provided to show the significant security advantages of
the proposed network and to characterize the impact of network resource on the
secrecy metrics.Comment: submitted to IEEE ICC 201