Optimising coverage efficiency in heterogeneous wireless cellular networks
Article
Phan, C. and Vien, Q. 2020. Optimising coverage efficiency in heterogeneous wireless cellular networks. IET Communications. 14 (17), pp. 3022-3029. https://doi.org/10.1049/iet-com.2020.0313
Type | Article |
---|---|
Title | Optimising coverage efficiency in heterogeneous wireless cellular networks |
Authors | Phan, C. and Vien, Q. |
Abstract | In this paper, we first propose an analytical model for investigating the impacts of power allocation (PA) and cell density allocation (CDA) on coverage efficiency (CE) of heterogeneous wireless cellular networks (HWCNs) under limited resources in various propagation environment. It is shown that the interference among cells that belong to different tiers is reduced significantly in a higher path loss environment and results in a higher coverage. In addition, the overall network coverage of the HWCN can be further extended with the deployment of a higher cell density in a more lossy environment. This accordingly leads us to develop an optimization problem (OP) to maximize the CE by optimizing the PA and CDA for a downlink HWCN under the constraint of limited power at cells and total power available in the network. In particular, we propose a two-stage approach for solving the OP to sequentially obtain the heuristic value of the CDA and PA due to complicated objective function along with various involved parameters in the practical HWCN. Numerical results reveal that the coverage obtained by the heuristic solution at the first-stage is significantly improved with a lower power than the conventional approach. Furthermore, an enhanced overall CE is achieved for all cases of the power constraint when applying fully two stages in our proposed algorithm. |
Keywords | cellular radio; resource allocation; optimisation; bandwidth allocation; probability; radiofrequency interference; radiowave propagation; power constraint; optimising coverage efficiency; heterogeneous wireless cellular networks ; analytical model ; cell density allocation; propagation environment ; higher path loss environment ; network coverage; lossy environment optimisation problem; downlink HWCN |
Publisher | IET |
Wiley | |
Journal | IET Communications |
ISSN | 1751-8628 |
Electronic | 1751-8636 |
Publication dates | |
Online | 20 Oct 2020 |
27 Oct 2020 | |
Publication process dates | |
Deposited | 29 Oct 2020 |
Accepted | 23 Jul 2020 |
Output status | Published |
Accepted author manuscript | |
Copyright Statement | This paper is a postprint of a paper submitted to and accepted for publication in IET Communications and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library https://digital-library.theiet.org/content/journals/10.1049/iet-com.... |
Digital Object Identifier (DOI) | https://doi.org/10.1049/iet-com.2020.0313 |
Web of Science identifier | WOS:000588425300018 |
Language | English |
https://repository.mdx.ac.uk/item/891xw
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