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Spectrum Sharing in mmWave Cellular Networks via Cell Association, Coordination, and Beamforming
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0001-6737-0266
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0001-9810-3478
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0002-2289-3159
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2016 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 34, no 11, 2902-2917 p.Article in journal (Refereed) Published
Abstract [en]

This paper investigates the extent to which spectrum sharing in millimeter-wave (mmWave) networks with multiple cellular operators is a viable alternative to traditional dedicated spectrum allocation. Specifically, we develop a general mathematical framework to characterize the performance gain that can be obtained when spectrum sharing is used, as a function of the underlying beamforming, operator coordination, bandwidth, and infrastructure sharing scenarios. The framework is based on joint beamforming and cell association optimization, with the objective of maximizing the long-term throughput of the users. Our asymptotic and non-asymptotic performance analyses reveal five key points: 1) spectrum sharing with light on-demand intra-and inter-operator coordination is feasible, especially at higher mmWave frequencies (for example, 73 GHz); 2) directional communications at the user equipment substantially alleviate the potential disadvantages of spectrum sharing (such as higher multiuser interference); 3) large numbers of antenna elements can reduce the need for coordination and simplify the implementation of spectrum sharing; 4) while inter-operator coordination can be neglected in the large-antenna regime, intra-operator coordination can still bring gains by balancing the network load; and 5) critical control signals among base stations, operators, and user equipment should be protected from the adverse effects of spectrum sharing, for example by means of exclusive resource allocation. The results of this paper, and their extensions obtained by relaxing some ideal assumptions, can provide important insights for future standardization and spectrum policy.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016. Vol. 34, no 11, 2902-2917 p.
Keyword [en]
Spectrum sharing, millimeter wave networks, coordination, beamforming
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-198575DOI: 10.1109/JSAC.2016.2615259ISI: 000388202700009ScopusID: 2-s2.0-84998655260OAI: oai:DiVA.org:kth-198575DiVA: diva2:1057718
Note

QC 20161219

Available from: 2016-12-19 Created: 2016-12-19 Last updated: 2017-01-11Bibliographically approved

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