Secure performance of emerging wireless sensor networks relying nonorthogonal multiple access

Abstract Recently the rapid growth of users’ demand leads to the development of advanced techniques to provide multimedia services (e.g., virtual reality and ultrahigh-definition video) and increasing demand in the Internet of Things (IoT) networks regarding multiple access to implement applications in practice. In addition, heterogeneous data traffic and massive connections are two barriers to implement the fifth-generation (5G) networks. To tackle the aforementioned challenges in 5G networks, nonorthogonal multiple access (NOMA) together with related IoT applications has been recently introduced. In principle, users who are capable of NOMA can be served, and nonorthogonal resource block is allocated to these NOMA users. However, secure performance of IoT system relying NOMA needs to be further studied since the existence of eavesdropper intends to overhear main signal. The theoretical analysis and numerical results are provided to verify the considered system. The prominent feature of NOMA-assisted IoT system is considered as useful guideline to implement some emerging techniques in fifth-generation (5G) network.