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Dynamic throughput maximization for the user-centric visible light downlink in the face of practical considerations

Dynamic throughput maximization for the user-centric visible light downlink in the face of practical considerations
Dynamic throughput maximization for the user-centric visible light downlink in the face of practical considerations

The concept of amorphous-boundary-based user-centric cells invoked for visible light communication (VLC) was shown to offer extra throughput benefits over the conventional network-centric VLC. However, this improvement was quantified based on a number of idealized simplifying assumptions, such as operating exactly at the Shannon capacity. Also, the light emitting diode in VLC was assumed to have no non-linear distortion and no clipping distortion. Furthermore, greedily supporting all the user equipments in the system may in fact reduce the achievable throughput, when the transmit power is restricted. To provide more practical performance estimate, in this paper, the dynamic throughput maximization of user-centric VLC (UC-VLC) systems is investigated under a range of practical considerations, where the number of served UEs, the modulation-mode assignment and the power allocation strategy are all dynamically decided by our proposed heuristic dynamic-programming-based algorithm. Our simulations indicate that both the achievable throughput and the outage probability of the proposed UC-VLC system is better than that of the conventional NC-VLC system, under a range of practical constraints.

Amorphous cell, Dynamic programming, Modulation assignment, Power allocation, Visible light communication
1536-1276
5001-5015
Feng, Simeng
038a3c0d-9d57-4031-8d38-2203ea230e79
Zhang, Rong
e54ae375-3495-4e40-aff1-4b8635ee2ede
Li, Xuan
de28eeac-cc76-4297-9897-3110b74971b0
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Feng, Simeng
038a3c0d-9d57-4031-8d38-2203ea230e79
Zhang, Rong
e54ae375-3495-4e40-aff1-4b8635ee2ede
Li, Xuan
de28eeac-cc76-4297-9897-3110b74971b0
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Feng, Simeng, Zhang, Rong, Li, Xuan, Wang, Qi and Hanzo, Lajos (2018) Dynamic throughput maximization for the user-centric visible light downlink in the face of practical considerations. IEEE Transactions on Wireless Communications, 17 (8), 5001-5015, [8370239]. (doi:10.1109/TWC.2018.2836429).

Record type: Article

Abstract

The concept of amorphous-boundary-based user-centric cells invoked for visible light communication (VLC) was shown to offer extra throughput benefits over the conventional network-centric VLC. However, this improvement was quantified based on a number of idealized simplifying assumptions, such as operating exactly at the Shannon capacity. Also, the light emitting diode in VLC was assumed to have no non-linear distortion and no clipping distortion. Furthermore, greedily supporting all the user equipments in the system may in fact reduce the achievable throughput, when the transmit power is restricted. To provide more practical performance estimate, in this paper, the dynamic throughput maximization of user-centric VLC (UC-VLC) systems is investigated under a range of practical considerations, where the number of served UEs, the modulation-mode assignment and the power allocation strategy are all dynamically decided by our proposed heuristic dynamic-programming-based algorithm. Our simulations indicate that both the achievable throughput and the outage probability of the proposed UC-VLC system is better than that of the conventional NC-VLC system, under a range of practical constraints.

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More information

Accepted/In Press date: 9 May 2018
e-pub ahead of print date: 31 May 2018
Published date: 1 August 2018
Keywords: Amorphous cell, Dynamic programming, Modulation assignment, Power allocation, Visible light communication

Identifiers

Local EPrints ID: 423216
URI: http://eprints.soton.ac.uk/id/eprint/423216
ISSN: 1536-1276
PURE UUID: 6db933e3-0966-41d2-b239-b8997b4c3ac7
ORCID for Qi Wang: ORCID iD orcid.org/0000-0003-2645-5807
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 19 Sep 2018 16:30
Last modified: 07 Oct 2020 01:33

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Contributors

Author: Simeng Feng
Author: Rong Zhang
Author: Xuan Li
Author: Qi Wang ORCID iD
Author: Lajos Hanzo ORCID iD

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