Physical layer security for 5G non-orthogonal multiple access in large-scale networks
Physical layer security for 5G non-orthogonal multiple access in large-scale networks
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DOI：
10.1109/icc.2016.7510755
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发表时间：
2016-05
期刊：
影响因子：
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通讯作者：
Zhijin Qin;Yuanwei Liu;Z. Ding;Yue Gao;M. Elkashlan
中科院分区：
文献类型：
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作者：
Zhijin Qin;Yuanwei Liu;Z. Ding;Yue Gao;M. Elkashlan
本文研究了在大规模网络中应用非正交多址接入（NOMA）的物理层安全性。在所考虑的场景中，NOMA用户和窃听者在空间上随机分布。采用源节点周围的保护区来增强随机网络的安全性。为了描述所考虑场景的保密性能，推导了安全中断概率的新的精确表达式和渐近表达式。这些分析结果表明，保密分集阶数为\(m\)，它由信道条件差的用户决定。提供了蒙特卡罗模拟来验证所推导的分析结果。此外，还证实了通过扩大保护区范围或缩小用户区范围，可以提高NOMA网络的安全性能。
In this paper, the physical layer security of applying non-orthogonal multiple access (NOMA) in large-scale networks is investigated. In the considered scenario, both the NOMA users and eavesdroppers are spatially randomly deployed. A protected zone around the source node is adopted to enhance the security of a random network. In order to characterize the secrecy performance of the considered scenario, new exact and asymptotic expressions for the security outage probability are derived. These analytical results demonstrate that the secrecy diversity order is m, which is determined by the user with poor channel condition. Monte Carlo simulations are provided to verify the derived analytical results. Furthermore, it is also confirmed that the secure performance of the NOMA networks can be improved by either enlarging the scope of the protected zone or reducing the scope of the user zone.