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Energy Efficient Heterogeneous Cellular Networks

Soh, Yong Sheng and Quek, Tony Q. S. and Kountouris, Marios and Shin, Hyundong (2013) Energy Efficient Heterogeneous Cellular Networks. IEEE Journal on Selected Areas in Communications, 31 (5). pp. 840-850. ISSN 0733-8716. doi:10.1109/JSAC.2013.130503.

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With the exponential increase in mobile internet traffic driven by a new generation of wireless devices, future cellular networks face a great challenge to meet this overwhelming demand of network capacity. At the same time, the demand for higher data rates and the ever-increasing number of wireless users led to rapid increases in power consumption and operating cost of cellular networks. One potential solution to address these issues is to overlay small cell networks with macrocell networks as a means to provide higher network capacity and better coverage. However, the dense and random deployment of small cells and their uncoordinated operation raise important questions about the energy efficiency implications of such multi-tier networks. Another technique to improve energy efficiency in cellular networks is to introduce active/sleep (on/off) modes in macrocell base stations. In this paper, we investigate the design and the associated tradeoffs of energy efficient cellular networks through the deployment of sleeping strategies and small cells. Using a stochastic geometry based model, we derive the success probability and energy efficiency in homogeneous macrocell (single-tier) and heterogeneous K-tier wireless networks under different sleeping policies. In addition, we formulate the power consumption minimization and energy efficiency maximization problems, and determine the optimal operating regimes for macrocell base stations. Numerical results confirm the effectiveness of switching off base stations in homogeneous macrocell networks. Nevertheless, the gains in terms of energy efficiency depend on the type of sleeping strategy used. In addition, the deployment of small cells generally leads to higher energy efficiency but this gain saturates as the density of small cells increases. In a nutshell, our proposed framework provides an essential understanding on the deployment of future green heterogeneous networks.

Item Type:Article
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URLURL TypeDescription
Soh, Yong Sheng0000-0003-3367-1401
Additional Information:© 2013 IEEE. Manuscript received April 15, 2011; revised November 2, 2012. This paper was presented in part at the IEEE International Conference on Communications, Budapest, Hungary, June 2013. This research was supported, in part, by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012-0005091 and No. 2012-0000919), SRG ISTD 2012037, CAS Fellowship for Young International Scientists Grant 2011Y2GA02, and SUTD-MIT International Design Centre under Grant IDSF1200106OH.
Funding AgencyGrant Number
National Research Foundation of Korea2012-0005091
National Research Foundation of Korea2012-0000919
SRG ISTD2012037
Chinese Academy of Sciences2011Y2GA02
SUTD-MIT International Design CentreIDSF1200106OH
Subject Keywords:Energy efficiency; green communications; heterogeneous wireless networks; power consumption; sleeping strategy; small cells; open access; stochastic geometry
Issue or Number:5
Record Number:CaltechAUTHORS:20130603-140357296
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Official Citation:Soh, Yong Sheng; Quek, Tony Q.S.; Kountouris, Marios; Shin, Hyundong, "Energy Efficient Heterogeneous Cellular Networks," Selected Areas in Communications, IEEE Journal on , vol.31, no.5, pp.840,850, May 2013 doi: 10.1109/JSAC.2013.130503
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38764
Deposited By: Tony Diaz
Deposited On:04 Jun 2013 19:07
Last Modified:09 Nov 2021 23:39

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