Full-Duplex Small-Cell Networks: A Physical-Layer Security Perspective
Full-Duplex Small-Cell Networks: A Physical-Layer Security Perspective
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DOI：
10.1109/tcomm.2018.2811495
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发表时间：
2018-03
影响因子：
8.3
通讯作者：
Ayda Babaei;A. Aghvami;Arman Shojaeifard;Kai‐Kit Wong
中科院分区：
文献类型：
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作者：
Ayda Babaei;A. Aghvami;Arman Shojaeifard;Kai‐Kit Wong
我们提供了全双工（FD）小型细胞网络中物理（PHY） - 层级安全性能的理论研究。在这里，基于均匀的泊松点过程的抽象模型遵循多个Antenna基站（BSS）和用户设备（UES）（UES）。为了促进FD通信，我们考虑了：1）通过任意半径的后卫区域和2）使用带有任意统计数据的RICIAN褪色分布在BS侧的后卫区域的连续干扰取消能力。在被动和勾结的窃听的不同情况下，我们在窃听器的泊松领域的存在下研究了小细胞网络PHY层安全性能。考虑到线性零功能的射击，我们表征了下行链路和上行链路的秘密速率，并为不同的有用和干扰信号统计数据提供了闭合表达式。在某些感兴趣的特殊情况下，我们将非线性曲线拟合技术应用于大量（确切的）理论数据，以便获得所考虑的不同千古率和ergodic的保密率的封闭形式近似值。我们的发现表明，除了提高光谱效率外，FD功能还可以显着提高PHY层的安全性能，尤其是在多Aantenna通信和干扰取消方案的帮助下。
We provide a theoretical study of physical (PHY)-layer security performance in full-duplex (FD) small-cell networks. Here, the multi-antenna base stations (BSs) and user equipments (UEs) follow from the homogeneous Poisson point process-based abstraction model. To facilitate FD communications, we take into account: 1) successive interference cancellation capability at the UE side via guard regions of arbitrary radii and 2) residual self-interference at the BS side using Rician fading distribution with arbitrary statistics. We investigate the small-cell network PHY-layer security performance in the presence of a Poisson field of eavesdroppers, under the different scenarios of passive and colluding eavesdropping. Considering linear zero-forcing beamforming, we characterize the downlink and the uplink ergodic secrecy rates and derive closed-form expressions for the different useful and interference signals statistics. In certain special cases of interest, we apply non-linear curve-fitting techniques to large sets of (exact) theoretical data in order to obtain closed-form approximations for the different ergodic rates and ergodic secrecy rates under consideration. Our findings indicate that the FD functionality, in addition to enhancing the spectral efficiency, can significantly improve the PHY-layer security performance, especially with the aid of multi-antenna communications and interference cancellation schemes.