全维度天线异构网物理层安全微基站部署研究
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摘要
异构网络配置全维度多天线利用垂直维度能够有效提高系统的传输速率,然而也会造成信号的泄露,影响系统的物理层安全性能。基于此,该文在异构网络下行链路中,全维度天线采用波束成形方法消除干扰,应用随机几何的分析方法,得到合法用户的安全连接概率闭合表达式,其安全连接概率与异构网络基站密度有关。仿真结构验证了安全连接概率结论的正确性,同时在给定的场景中,确定了异构网络基站的密度值。
Heterogeneous network with full-dimensional(FD) multiple-input multiple-output(MIMO) can effectively improve the transmission rate by developing vertical dimensions; however, it can cause the signal leakage and decrease the system's physical layer security performances. In this paper, using the beamforming to eliminate the interference in the downlink of the heterogeneous network, we propose an analysis method with stochastic geometric theory to obtain the closed-form expression of the secure connection probability on the legitimate users. The secure connection probability is related to the density of heterogeneous network small cell base stations(BSs). Simulation results verify the correctness of the safety connection probability, and determine the density value of heterogeneous network BS in a given scenario.
Heterogeneous network with full-dimensional(FD) multiple-input multiple-output(MIMO) can effectively improve the transmission rate by developing vertical dimensions; however, it can cause the signal leakage and decrease the system's physical layer security performances. In this paper, using the beamforming to eliminate the interference in the downlink of the heterogeneous network, we propose an analysis method with stochastic geometric theory to obtain the closed-form expression of the secure connection probability on the legitimate users. The secure connection probability is related to the density of heterogeneous network small cell base stations(BSs). Simulation results verify the correctness of the safety connection probability, and determine the density value of heterogeneous network BS in a given scenario.
引文
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[2]CHEN Z,QIU L,LIANG X.Area spectral efficiency analysis of multi-antenna two-tier cellular networks[J].IEEE Communications Letters,2017,21(1):108-111.
[3]HAO W,YANG S.Small cell cluster-based resource allocation for wireless backhaul in two-tier heterogeneous networks with massive MIMO[J].IEEE Transactions on Vehicular Technology,2018,67(1):509-523.
[4]YAACOUB E,Al-HUSSEINI M.Achieving physical layer security with massive MIMO beamforming[C]//European Conference on Antennas and Propagation.Pairs,France:IEEE,2017:1753-1757.
[5]WANG H M,ZHENG T X,YUAN J,et al.Physical layer security in heterogeneous cellular networks[J].IEEETransactions on Communications,2016,64(3):1204-1219.
[6]ZHONG Z H,PENG J H,LUO W Y,et al.A tractable approach to analyzing the physical-layer security in k-tier heterogeneous cellular networks[J].China Communications,2015,12(s1):166-173.
[7]WANG W,TEH K C,LI K H.Artificial noise aided physical layer security in multi-antenna small-cell networks[J].IEEETransactions on Information Forensics&Security,2017,12(6):1470-1482.
[8]LI X,JIN S,SURAWEERA H A,et al.Statistical 3-Dbeamforming for large-scale mimo downlink systems over rician fading channels[J].IEEE Transactions on Communications,2016,64(4):1529-1543.
[9]LIU C,NATARAJAN B,XIA H.Small cell base station sleep strategies for energy efficiency[J].IEEE Transactions on Vehicular Technology,2016,65(3):1652-1661.
[10]LI Z,GRACE D,MITCHELL P.Traffic-aware cell management for green ultra-dense small cell networks[J].IEEE Transactions on Vehicular Technology,2017,66(3):2600-2614.
[11]DENG Y,WANG L,ELKASHLAN M,et al.Physical layer security in three-tier wireless sensor networks:a stochastic geometry approach[J].IEEE Transactions on Information Forensics&Security,2016,11(6):1128-1138.
[12]JO H S,SANG Y J,XIA P,et al.Heterogeneous cellular networks with flexible cell association:a comprehensive downlink sinr analysis[J].IEEE Transactions on Wireless Communications,2011,11(10):3484-3495.
[13]HERNANDEZ A R,ZAIDI S A R,MCLERNON D,et al.Tilt angle optimization in two-tier cellular networks-a stochastic geometry approach[J].IEEE Transactions on Communications,2015,63(12):5162-5177.