Analysis on Physical-Layer Security for Multi-Cell Coordination Aided Ultra-Dense Heterogeneous Networks

Zhihao ZHONG  Jianhua PENG  Kaizhi HUANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E100-B   No.10   pp.1846-1855
Publication Date: 2017/10/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
Category: Network
Keyword: 
ultra dense heterogeneous networks,  physical-layer security,  ubiquitous array,  massive MIMO,  multi-cell coordination,  

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Summary: 
In order to satisfy the very high traffic demand in crowded hotspot areas and realize adequate security in future fifth-generation networks, this paper studies physical-layer security in the downlink of a two-tier ultra dense heterogeneous network, where a ubiquitous array formed by ultra dense deployed small-cells surrounds a macrocell base station. In this paper, the locations of legitimate users and eavesdroppers are drawn from Poisson point processes. Then, the cumulative distribution functions of the receive signal-to-interference-plus-noise ratio for legitimate users and eavesdroppers are derived. Further, the average secrecy rate and secrecy coverage probability for each tier as well as for the whole network are investigated. Finally, we analyze the influences on secrecy performance caused by eavesdropper density, transmit power allocation ratio, antenna number allocation ratio, and association area radius.