University of Oulu

Y. Jiang et al., "Energy-Efficient Noncooperative Power Control in Small-Cell Networks," in IEEE Transactions on Vehicular Technology, vol. 66, no. 8, pp. 7540-7547, Aug. 2017. doi: 10.1109/TVT.2017.2673245

Energy-efficient noncooperative power control in small-cell networks

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Author: Jiang, Yanxiang1; Lu, Ningning1; Chen, Yan2;
Organizations: 1National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
2School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611051, China
3Department of Electronic Engineering, University of York, York YO10 5DD, U.K.
4Centre for Wireless Communications, University of Oulu, Oulu 90014, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.4 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2017
Publish Date: 2018-08-02


In this paper, energy-efficient power control for small cells underlaying a macrocellular network is investigated. We formulate the power control problem in self-organizing small-cell networks as a noncooperative game and propose a distributed energy-efficient power control scheme, which allows the small base stations (SBSs) to take individual decisions for attaining the Nash equilibrium (NE) with minimum information exchange. In particular, in the noncooperative power control game, a nonconvex optimization problem is formulated for each SBS to maximize their energy efficiency (EE). By exploiting the properties of parameter-free fractional programming and the concept of perspective function, the nonconvex optimization problem for each SBS is transformed into an equivalent constrained convex optimization problem. Then, the constrained convex optimization problem is converted into an unconstrained convex optimization problem by exploiting the mixed penalty function method. The inequality constraints are eliminated by introducing the logarithmic barrier functions, and the equality constraint is eliminated by introducing the quadratic penalty function. We also theoretically show the existence and the uniqueness of the NE in the noncooperative power control game. Simulation results show remarkable improvements in terms of EE by using the proposed scheme.

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Series: IEEE transactions on vehicular technology
ISSN: 0018-9545
ISSN-E: 1939-9359
ISSN-L: 0018-9545
Volume: 66
Issue: 8
Pages: 7540 - 7547
DOI: 10.1109/TVT.2017.2673245
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This work was supported in part by the National 863 Project under Grant 2015AA01A709, the National Basic Research Program of China (973 Program 2012CB316004), the Natural Science Foundation of China under Grant 61221002 and Grant 61521061, and the U.K. Engineering and Physical Sciences Research Council under Grant EP/K040685/2.
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