In this work, the intelligent reconfigurable surface (IRS) has been proposed to relax the requirement of line-of-sight (LOS) channel gain of the cell-edge user in the non-orthogonal multiple access visible light communication (NOMA-VLC) system, in which the physical layer security (PLS) of the cell-edge user has been enhanced by optimizing the power allocation method at the transmitter. Besides, different mobility models have been adopted for the paired NOMA users to cope with the real indoor environment. The optimal power allocation method and non-silent probability (NSP) of the transmitter are mathematically derived by considering different cases of users’ channel gains. Through simulations, performances of the secrecy rate of the cell-edge legitimate user and NSP of the transmitter are analyzed in detail, where the impacts of the main system parameters are also studied. This work can serve as a good reference for further study of the secure VLC system.
| [1] |
Hari S O K, Sah A K. Multi-user grouping for NOMA enabled VLC system. IEEE communications letters, 2024, 28(5): 1072-1076 J]
|
| [2] |
Yu L, Lv X, Zhang M, et al. . Performance analysis of NOMA-based VLC system in different IoT network environments. IEEE internet of things journal, 2024, 11(17): 27944-27954 J]
|
| [3] |
Li Q, Shang T, Tang T, et al. . Adaptive user association scheme for indoor multi-user NOMA-VLC systems. IEEE wireless communications letters, 2023, 12(5): 873-877 J]
|
| [4] |
Cao T, Zhang H, Song J. BER performance analysis for downlink nonorthogonal multiple access with error propagation mitigated method in visible light communications. IEEE transactions on vehicular technology, 2021, 70(9): 9190-9206 J]
|
| [5] |
Li G, Wang P, Yang T, et al. . Secrecy sum-rate enhancement for NOMA-VLC system with pseudo user. IEEE communications letters, 2023, 27(1): 243-247 J]
|
| [6] |
Peng H, Wang Z, Han S, et al. . Physical layer security for MISO NOMA VLC system under eavesdropper collusion. IEEE transactions on vehicular technology, 2021, 70(6): 6249-6254 J]
|
| [7] |
Dai L, Wang B, Yuan Y, et al. . Non-orthogonal multiple access for 5G: solutions, challenges, opportunities, and future research trends. IEEE communications magazine, 2015, 53(9): 74-81 J]
|
| [8] |
Lei L, Yuan D, Ho C K, et al. . Power and channel allocation for non-orthogonal multiple access in 5G systems: tractability and computation. IEEE transactions on wireless communications, 2016, 15(12): 8580-8594 J]
|
| [9] |
Bettstetter C, Hartenstein H, Pérez-Costa X. Stochastic properties of the random waypoint mobility model. Wireless networks, 2004, 10(5): 555-567 J]
|
| [10] |
Qian L, Chi X, Zhao L, et al. . Secure visible light communications via intelligent reflecting surfaces. Proceedings of the ICC 2021 IEEE International Conference on Communications, June 29, 2021, Montreal, QC, Canada. 2021, New York, IEEE16[C]
|
| [11] |
Ding Z, Schober R, Poor HV. A new QoS-guarantee strategy for NOMA assisted semi-grant-free transmission. IEEE transactions on communications, 2021, 69(11): 7489-7503 J]
|
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