Low-complexity energy-efficient resource allocation for the downlink of cellular systems

Héliot, F., Imran, M. A. and Tafazolli, R. (2013) Low-complexity energy-efficient resource allocation for the downlink of cellular systems. IEEE Transactions on Communications, 61(6), pp. 2271-2281. (doi:10.1109/TCOMM.2013.042313.120516)

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Abstract

Energy efficiency (EE) is undoubtedly an important criterion for designing power-limited systems, and yet in a context of global energy saving, its relevance for power-unlimited systems is steadily growing. Equally, resource allocation is a well-known method for improving the performance of cellular systems. In this paper, we propose an EE optimization framework for the downlink of planar cellular systems over frequency-selective channels. Relying on this framework, we design two novel low-complexity resource allocation algorithms for the single-cell and coordinated multi-cell scenarios, which are EE-optimal and EE-suboptimal, respectively. We then utilize our algorithms for comparing the EE performance of the classic non-coordinated, orthogonal and coordinated multi-cell approaches in realistic power and system settings. Our results show that coordination can be a simple and effective method for improving the EE of cellular systems, especially for medium to large cell sizes. Indeed, by using a coordinated rather than a non-coordinated resource allocation approach, the per-sector energy consumption and transmit power can be reduced by up to 15% and more than 90%, respectively.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Héliot, F., Imran, M. A., and Tafazolli, R.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IEEE Transactions on Communications
Publisher:IEEE
ISSN:0090-6778
ISSN (Online):1558-0857
Published Online:30 April 2013
Copyright Holders:Copyright © 2013 IEEE
First Published:First published in IEEE Transactions on Communications 61(6): 2271-2281
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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