Wang, K;
Qi, N;
Liu, H;
Boulogeorgos, AAA;
Tsiftsis, TA;
Xiao, M;
Wong, KK;
(2024)
Reconfigurable Intelligent Surfaces Aided Energy Efficiency Maximization in Cell-Free Networks.
IEEE Wireless Communications Letters
10.1109/LWC.2024.3382778.
(In press).
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Abstract
As we move towards next-generation wireless networks, the need for sustainability through energy efficiency (EE) concepts becomes more important than ever. Meanwhile, technology enablers, such as beamforming and reconfigurable intelligent surfaces (RISs), if appropriately used in a synergetic manner, can deliver profound excellence in terms of EE. Motivated by this, in this paper, we introduce an EE maximization policy that accounts for the rate demands of the end-users in RIS-assisted cell-free networks. The policy aims at performing joint optimization of the transmit beamforming vectors and the RIS phase-shift matrices in order to maximize the EE. In this direction, we first formulate the corresponding optimization problem, which is non-convex. To solve it, we rely on advanced optimization methods such as quadratic and Lagrangian dual transforms. Numerical results highlight the superiority of the presented policy in comparison to baseline approaches and reveal the most impactful network parameters.
| Type: | Article |
|---|---|
| Title: | Reconfigurable Intelligent Surfaces Aided Energy Efficiency Maximization in Cell-Free Networks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/LWC.2024.3382778 |
| Publisher version: | http://dx.doi.org/10.1109/lwc.2024.3382778 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Reconfigurable intelligent surface, cell-free network, energy efficiency maximization, fractional programming, beamforming |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191308 |
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