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Energy-efficient Coordinated Resource Allocation for the Downlink of Cellular Systems

Heliot, F, Imran, MA and Tafazolli, R Energy-efficient Coordinated Resource Allocation for the Downlink of Cellular Systems In: ICT Future Network & Mobile Summit, 2013-07-03 - 2013-07-05, Lisbon, Portugal.

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Energy efficiency (EE) is growing in importance as a system design crite- rion for power-unlimited system such as cellular systems. Equally, resource allocation is a well-known method for improving the performance of the latter. In this paper, we propose two novel coordinated resource allocation strategies for jointly optimizing the resources of three sectors/cells in an energy-efficient manner in the downlink of multi-cell/sector systems. Given that this optimization problem is non-convex, it can only be optimally solved using high complexity exhaustive search. Here, we propose two practical approaches for allocating resources in a low complexity manner. We then compare our novel approaches against other existing non-coordinated and co- ordinated ones in order to highlight their benefit. Our results indicate that our first approach performs the best in terms of EE but with a low level of fairness in the user rate allocation; whereas our second approach provides a good trade-off between EE and fairness. Overall, base station selection, i.e. allowing only one sector to transmit at a time, is a very energy-efficient approach when the sleeping power is considered in the base station power model.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions : Surrey research (other units)
Authors : Heliot, F, Imran, MA and Tafazolli, R
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:24
Last Modified : 23 Jan 2020 13:02

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