Security-Reliability Tradeoff for Distributed Antenna Systems in Heterogeneous Cellular Networks
Yulong Zou, Ming Sun, Jia Zhu, and Haiyan Guo

TL;DR
This paper proposes an interference-canceled antenna selection scheme to improve physical-layer security in heterogeneous cellular networks, balancing security and reliability for macro and small cells.
Contribution
It introduces the IC-OAS scheme that enhances security-reliability tradeoff by canceling interference, outperforming conventional methods in heterogeneous networks.
Findings
IC-OAS improves security-reliability tradeoff for macro and small cells.
Closed-form expressions for intercept and outage probabilities are derived.
Numerical results confirm the superiority of IC-OAS over traditional schemes.
Abstract
In this paper, we investigate physical-layer security for a spectrum-sharing heterogeneous cellular network comprised of a macro cell and a small cell, where a passive eavesdropper is assumed to tap the transmissions of both the macro cell and small cell. In the macro cell, a macro base station (MBS) equipped with multiple distributed antennas sends its confidential information to a macro user (MU) through an opportunistic transmit antenna. Meanwhile, in the small cell, a small base station (SBS) transmits to a small user (SU) over the same spectrum used by MBS. We propose an interference-canceled opportunistic antenna selection (IC-OAS) scheme to enhance physical-layer security for the heterogeneous network. To be specific, when MBS sends its confidential message to MU through an opportunistic distributed antenna, a special signal is artificially designed and emitted at MBS to ensure…
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Taxonomy
TopicsWireless Communication Security Techniques · Advanced MIMO Systems Optimization · Cooperative Communication and Network Coding
