TY - JOUR
T1 - Dimming-Aware Interference Mitigation for NOMA-Based Multi-Cell VLC Networks
AU - Eltokhey, Mahmoud Wafik
AU - Khalighi, Mohammad Ali
AU - Ghassemlooy, Zabih
N1 - Funding Information:
Manuscript received June 10, 2020; accepted June 30, 2020. Date of publication July 6, 2020; date of current version November 11, 2020. This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 764461 (VisIoN: Visible light based Interoperability and Networking). The associate editor coordinating the review of this letter and approving it for publication was H. Le-Minh. (Corresponding author: Mohammad-Ali Khalighi.) Mahmoud Wafik Eltokhey and Mohammad-Ali Khalighi are with Aix Marseille University, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 1997-2012 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11
Y1 - 2020/11
N2 - This letter proposes inter-cell interference mitigation in a dimming-aware way for multi-cell visible-light communication networks, through efficient time-scheduling, scaling, and coordination of non-orthogonal multiple access (NOMA) transmissions at the access points. By this method, users are grouped and served in different time slots depending on whether they are at the center or at the edge of the cell. This reduces the number of NOMA users per time slot, which decreases the network computational complexity, by reducing the average number of successive interference cancellation steps. Comparison of the proposed scheme with the classical NOMA over different dimming constraints shows an improvement of up to 39% and 37% in the average sum-rate and fairness, respectively, for a 30% duty cycle transmission in a 4-cell scenario with 8 users.
AB - This letter proposes inter-cell interference mitigation in a dimming-aware way for multi-cell visible-light communication networks, through efficient time-scheduling, scaling, and coordination of non-orthogonal multiple access (NOMA) transmissions at the access points. By this method, users are grouped and served in different time slots depending on whether they are at the center or at the edge of the cell. This reduces the number of NOMA users per time slot, which decreases the network computational complexity, by reducing the average number of successive interference cancellation steps. Comparison of the proposed scheme with the classical NOMA over different dimming constraints shows an improvement of up to 39% and 37% in the average sum-rate and fairness, respectively, for a 30% duty cycle transmission in a 4-cell scenario with 8 users.
KW - inter-cell interference
KW - multi-cell networks
KW - non-orthogonal multiple access
KW - Visible light communications
UR - https://www.scopus.com/pages/publications/85096157336
U2 - 10.1109/LCOMM.2020.3007552
DO - 10.1109/LCOMM.2020.3007552
M3 - Article
AN - SCOPUS:85096157336
SN - 1089-7798
VL - 24
SP - 2541
EP - 2545
JO - IEEE Communications Letters
JF - IEEE Communications Letters
IS - 11
M1 - 9133587
ER -