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Joint user association and power allocation for cell-free visible light communication networks

Joint user association and power allocation for cell-free visible light communication networks
Joint user association and power allocation for cell-free visible light communication networks

As a complementary technology for conventional radio frequency communication, visible light communication (VLC) is a potential form of the optical wireless communication, which can provide both communication and illumination simultaneously. Since load balancing and power control for interference management are key challenges in the network deployment, we consider a joint user association and power allocation scheme in a cell-free VLC network to improve the system performance. It is mathematically formulated as a non-convex network utility maximization problem in consideration of the user fairness, load balancing, and power control. To tackle this non-convex problem, we divide it into two subproblems (i.e., the user association subproblem and the power allocation subproblem) and solve them with the dual projected gradient algorithm and successive convex approximation algorithm iteratively until a stationary point is found. Simulation results verify that significant gain can be achieved with the proposed scheme compared with the user association schemes without consideration of the power control.

dual theory, network utility maximization, power allocation, user association, Visible light communication
0733-8716
136-148
Jiang, Rui
5222e4f7-e7e1-4aff-a9d0-9fef1db084c2
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Haas, Harald
cdf0c1b3-2410-4cb4-bdc2-0221b5290267
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Jiang, Rui
5222e4f7-e7e1-4aff-a9d0-9fef1db084c2
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Haas, Harald
cdf0c1b3-2410-4cb4-bdc2-0221b5290267
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6

Jiang, Rui, Wang, Qi, Haas, Harald and Wang, Zhaocheng (2018) Joint user association and power allocation for cell-free visible light communication networks. IEEE Journal on Selected Areas in Communications, 36 (1), 136-148. (doi:10.1109/JSAC.2017.2774400).

Record type: Article

Abstract

As a complementary technology for conventional radio frequency communication, visible light communication (VLC) is a potential form of the optical wireless communication, which can provide both communication and illumination simultaneously. Since load balancing and power control for interference management are key challenges in the network deployment, we consider a joint user association and power allocation scheme in a cell-free VLC network to improve the system performance. It is mathematically formulated as a non-convex network utility maximization problem in consideration of the user fairness, load balancing, and power control. To tackle this non-convex problem, we divide it into two subproblems (i.e., the user association subproblem and the power allocation subproblem) and solve them with the dual projected gradient algorithm and successive convex approximation algorithm iteratively until a stationary point is found. Simulation results verify that significant gain can be achieved with the proposed scheme compared with the user association schemes without consideration of the power control.

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More information

Accepted/In Press date: 16 September 2017
e-pub ahead of print date: 16 November 2017
Published date: 1 January 2018
Keywords: dual theory, network utility maximization, power allocation, user association, Visible light communication

Identifiers

Local EPrints ID: 417478
URI: https://eprints.soton.ac.uk/id/eprint/417478
ISSN: 0733-8716
PURE UUID: e41fd300-bb50-4779-a38f-74054d625e83
ORCID for Qi Wang: ORCID iD orcid.org/0000-0003-2645-5807

Catalogue record

Date deposited: 01 Feb 2018 17:30
Last modified: 01 Feb 2018 17:30

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Contributors

Author: Rui Jiang
Author: Qi Wang ORCID iD
Author: Harald Haas
Author: Zhaocheng Wang

University divisions

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