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Asymptotic behavior of ultra-dense cellular networks and its economic impact
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Radio Systems Laboratory (RS Lab). KTH, School of Information and Communication Technology (ICT), Centres, Center for Wireless Systems, Wireless@kth.ORCID iD: 0000-0003-4986-6123
2014 (English)In: 2014 IEEE Global Communications Conference, GLOBECOM 2014, 2014, 4941-4946 p.Conference paper (Refereed)
Abstract [en]

This paper investigates the relationship between base station (BS) density and average spectral efficiency (SE) in the downlink of a cellular network. This relationship has been well known for sparse deployment, i.e. when the number of BSs is small compared to the number of users. In this case the SE is independent of BS density. As BS density grows, on the other hand, it has previously been shown that increasing the BS density increases the SE, but no tractable form for the SE-BS density relationship has yet been derived. In this paper we derive such a closed-form result that reveals the SE is asymptotically a logarithmic function of BS density as the density grows. Further, we study the impact of this result on the network operator's profit when user demand varies, and derive the profit maximizing BS density and the optimal amount of spectrum to be utilized in closed forms. In addition, we provide deployment planning guidelines that will aid the operator in his decision if he should invest in densifying his network or in acquiring more spectrum.

Place, publisher, year, edition, pages
2014. 4941-4946 p.
Keyword [en]
Average spectral efficiency, Base station density, Network economics, Profit maximization, Spectrum amount, Stochastic geometry, Ultra-dense cellular network, Base stations, Mobile telecommunication systems, Profitability, Stochastic systems, Wireless networks, Cellular network, Mobile security
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-167494DOI: 10.1109/GLOCOM.2014.7037588ScopusID: 2-s2.0-84924358331ISBN: 9781479935116OAI: diva2:820638
2014 IEEE Global Communications Conference, GLOBECOM 2014, 8 December 2014 through 12 December 2014

QC 20150612

Available from: 2015-06-12 Created: 2015-05-22 Last updated: 2015-06-12Bibliographically approved

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Zander, Jens
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Radio Systems Laboratory (RS Lab)Center for Wireless Systems, Wireless@kth
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