Physical Layer Security in Large-Scale Millimeter Wave Ad Hoc Networks
Physical Layer Security in Large-Scale Millimeter Wave Ad Hoc Networks
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DOI：
10.1109/glocom.2016.7842143
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
Yongxu Zhu;Lifeng Wang;Kai‐Kit Wong;R. Heath
中科院分区：
文献类型：
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作者：
Yongxu Zhu;Lifeng Wang;Kai‐Kit Wong;R. Heath
具有定向天线的无线网络（如毫米波（mmWave）网络）具有增强的安全性。然而，对于窃听者随机定位的大规模毫米波自组织网络，窃听者仍然可以拦截机密消息，因为它们可能驻留在信号波束中。本文探讨了毫米波ad hoc网络的物理层安全的潜力。具体来说，我们表征毫米波信道特性和大型天线阵列的保密性能的影响。我们还描述了人工噪声在这个网络中的影响。研究结果表明，在低发射功率下，使用低毫米波频率可以获得更好的保密性能，当发射功率增加时，需要从低毫米波频率向高毫米波频率过渡以获得更高的保密率。发射机通过使用宽波束图可以拦截更多的信息。此外，在节点密度较低的情况下，使用人工噪声可能无法提高保密率。
Wireless networks with directional antennas, like millimeter wave (mmWave) networks, have enhanced security. For a large scale mmWave ad hoc network in which eavesdroppers are randomly located, however, eavesdroppers can still intercept the confidential messages, since they may reside in the signal beam. This paper explores the potential of physical layer security in the mmWave ad hoc networks. Specifically, we characterize the impact of mmWave channel characteristics and large antenna arrays on the secrecy performance. We also characterize the impact of artificial noise in this networks. Our results reveal that in the low transmit power regime, the use of low mmWave frequency achieves better secrecy performance, when increasing transmit power, a transition from low mmWave frequency to high mmWave frequency is demanded for obtaining more secrecy rate. Eavesdroppers can intercept more information by using wide beam pattern. Furthermore, the use of artificial noise may be unable to enhance the secrecy rate for the case of low node density.