scholarly journals Strategy-Based Gain Ratio Power Allocation in Non-Orthogonal Multiple Access for Indoor Visible Light Communication Networks

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 15250-15261 ◽  
Author(s):  
Siyu Tao ◽  
Hongyi Yu ◽  
Qing Li ◽  
Yanqun Tang
Keyword(s):  
Visible Light ◽  
Power Allocation ◽  
Communication Networks ◽  
Multiple Access ◽  
Visible Light Communication ◽  
Gain Ratio ◽  
Visible Light Communication Networks

scholarly journals Power Allocation of Non-Orthogonal Multiple Access Based on Dynamic User Priority for Indoor QoS-Guaranteed Visible Light Communication Networks

2018 ◽  
Vol 8 (8) ◽  
pp. 1219 ◽  
Author(s):  
Siyu Tao ◽  
Hongyi Yu ◽  
Qing Li ◽  
Xiangwei Bai ◽  
Yanqun Tang
Keyword(s):  
Visible Light ◽  
Power Allocation ◽  
Communication Networks ◽  
User Satisfaction ◽  
Multiple Access ◽  
Visible Light Communication ◽  
Small Cells ◽  
System Throughput ◽  
User Data ◽  
User Priority

Non-orthogonal multiple access (NOMA) simultaneously provides multi-user access over the same frequency band or time period, which can significantly improve system throughput in visible light communication (VLC) networks. However, the different interference components of NOMA and the diversified user requirements in VLC are difficult to coordinate. To guarantee both throughput enhancement and quality of service (QoS) satisfaction, this paper presents a power allocation scheme based on dynamic user priority in indoor NOMA-VLC networks. We introduce fuzzy logic (FL) to flexibly analyse user priority and assign signal power using multi-dimensional user features. The experimental results show that our method achieves the best performance in terms of user fairness and satisfaction. In indoor VLC, which has small cells with a high user density, our method outperforms contrastive schemes in terms of the average user data rate (AUDR). Therefore, in comparisons between static and dynamic user priority, our study indicates the fairness advantages of FL for the dynamic evaluation of user priority. In comparisons between NOMA and orthogonal multiple access, our study reflects the AUDR advantages of non-orthogonal methods. Furthermore, in comparisons of user satisfaction, our method outperforms existing methods, indicating the achievement of the QoS guarantee.

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