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Energy efficient resource allocation in two-tier OFDMA networks with QoS guarantees
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.ORCID iD: 0000-0003-4006-5848
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.ORCID iD: 0000-0003-4006-5848
2017 (English)In: Wireless networks, ISSN 1022-0038, E-ISSN 1572-8196Article in journal (Refereed) Published
Abstract [en]

In this paper, we study joint power and subchannel allocation problem for OFDMA based femtocell networks with focus on uplink direction. We minimize the aggregate power of all Femto user equipments and maximize the total system energy efficiency while satisfying the minimum required rate of all users. An interference limit constraint is considered to protect the QoS of macrocells. The original problem is a mixed-integer non-convex optimization problem which is converted to a convex problem using the time-sharing concept. Three algorithms are proposed to provide a scheme to optimize the goal function while meeting the constraints. The complexity order of all algorithms was investigated and was compared to other alternative solutions. The analytic and simulation results have demonstrated that the proposed algorithms could achieve significant power saving and better energy efficiency compared to existing algorithms. Energy efficient resource allocation in two-tier OFDMA networks with QoS guarantees.

Place, publisher, year, edition, pages
Springer, 2017.
Keyword [en]
Femtocell, Resource Allocation, Power Minimizations, Energy Efficiency, Convex Optimization
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-205192DOI: 10.1007/s11276-016-1442-5OAI: oai:DiVA.org:kth-205192DiVA: diva2:1087571
Note

QC 20170410

Available from: 2017-04-07 Created: 2017-04-07 Last updated: 2017-05-23Bibliographically approved

Open Access in DiVA

fulltext(1807 kB)39 downloads
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Publisher's full texthttps://link.springer.com/article/10.1007/s11276-016-1442-5

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CiteExportLink to record
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