Optimizing Energy Efficiency Over Energy-Harvesting LTE Cellular Networks

We consider the problem of downlink scheduling in an LTE network powered by energy harvesting devices. We formulate optimization problems that seek to optimize popular energy efficiency metrics subject to mandatory LTE network constraints along with energy harvesting causality constraints. We identi...

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Vydané v:IEEE transactions on green communications and networking Ročník 1; číslo 3; s. 320 - 332
Hlavní autori: Mahdavi-Doost, Hajar, Prasad, Narayan, Rangarajan, Sampath
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: IEEE 01.09.2017
Predmet:
Approximation algorithms
Downlink
energy causality constraints
energy efficiency
Energy harvesting
Long Term Evolution
LTE cellular network
matroid
Measurement
Optimization
Resource management
submodular maximization
ISSN:2473-2400, 2473-2400
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Shrnutí:We consider the problem of downlink scheduling in an LTE network powered by energy harvesting devices. We formulate optimization problems that seek to optimize popular energy efficiency metrics subject to mandatory LTE network constraints along with energy harvesting causality constraints. We identify a key sub-problem pertaining to maximizing the weighted sum rate that is common for all optimization problems that we consider, and is also of independent interest. We show that the latter sub-problem can be reformulated as a constrained submodular set function maximization problem which enables us to design a constant-factor approximation algorithm for maximizing the weighted sum rate. We leverage this algorithm to design approximation algorithms (with provable performance guarantees) for maximizing all considered energy efficiency metrics over an energy harvesting LTE downlink. Our proposed algorithms are simple to implement and offer superior performance.
ISSN:2473-2400
2473-2400
DOI:10.1109/TGCN.2017.2717789