Vol.125, No.1, 2020, pp.239-257, doi:10.32604/cmes.2020.010778
OPEN ACCESS
ARTICLE
Performance Analysis of Intelligent CR-NOMA Model for Industrial IoT Communications
  • Yinghua Zhang1,2, Jian Liu1, Yunfeng Peng1, Yanfang Dong2, Changming Zhao3,*
1 School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing, 100083, China
2 Dawning Information Industry Co., Ltd., Beijing, 100193, China
3 School of Computer Science, Chengdu University of Information Technology, Chengdu, 610225, China
* Corresponding Author: Changming Zhao. Email: zcm84@cuit.edu.cn
(This article belongs to this Special Issue: Intelligent Models for Security and Resilience in Cyber Physical Systems)
Received 01 April 2020; Accepted 03 May 2020; Issue published 18 September 2020
Abstract
Aiming for ultra-reliable low-latency wireless communications required in industrial internet of things (IIoT) applications, this paper studies a simple cognitive radio non-orthogonal multiple access (CR-NOMA) downlink system. This system consists of two secondary users (SUs) dynamically interfered by the primary user (PU), and its performance is characterized by the outage probability of the SU communications. This outage probability is calculated under two conditions where, a) the transmission of PU starts after the channel state information (CSI) is acquired, so the base station (BS) is oblivious of the interference, and b) when the BS is aware of the PU interference, and the NOMA transmission is adapted to the more comprehensive knowledge of the signal to interference plus noise ratio (SINR). These results are verified by simulations, and their good agreement suggests our calculations can be used to reduce the complexity of future analysis. We find the outage probability is reduced when the SUs move further away from the primary transmitter or when the signal from PU is less powerful, and the BS always has better performance when it is aware of the interference. The findings thus emphasize the importance of monitoring the channel quality and realtime feedback to optimize the performance of CR-NOMA system.
Keywords
Industrial internet of things (IIoT); non-orthogonal multiple access (NOMA); quality of service (QoS); successive interference cancellation (SIC)
Cite This Article
Zhang, Y., Liu, J., Peng, Y., Dong, Y., Zhao, C. (2020). Performance Analysis of Intelligent CR-NOMA Model for Industrial IoT Communications. CMES-Computer Modeling in Engineering & Sciences, 125(1), 239–257.
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