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Wireless Communications and Mobile Computing
Volume 2018, Article ID 4359261, 11 pages
Research Article

On the Secrecy Capacity of 5G New Radio Networks

School of Computer Science and Technology, North China University of Technology, Beijing 100144, China

Correspondence should be addressed to Ke Xiao; moc.361@oaix_nahez

Received 30 November 2017; Accepted 2 April 2018; Published 7 May 2018

Academic Editor: Gui-Ling Sun

Copyright © 2018 Ke Xiao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The new radio technology for the fifth-generation wireless system has been extensively studied all over the world. Specifically, the air interface protocols for 5G radio access network will be standardized by the 3GPP in the coming years. In the next-generation 5G new radio (NR) networks, millimeter wave (mmWave) communications will definitely play a critical role, as new NR air interface (AI) is up to 100 GHz just like mmWave. The rapid growth of mmWave systems poses a variety of challenges in physical layer (PHY) security. This paper investigates those challenges in the context of several 5G new radio communication technologies, including multiple-input multiple-output (MIMO) and nonorthogonal multiple access (NOMA). In particular, we introduce a ray-tracing (RT) based 5G NR network channel model and reveal that the secrecy capacity in mmWave band widely depends on the richness of radio frequency (RF) environment through numerical experiments.