Energy-Efficient Scheduling for Downlink Multi-User MIMO
2012 (English)In: IEEE International Conference on Communications (ICC) 2012, IEEE conference proceedings, 2012, 4390-4394 p.Conference paper, Presentation (Refereed)
Multi-user MIMO is the enabling technology forLTE-Advanced systems to meet IMT-Advanced targets. The gainof multi-user MIMO is achieved partially through advanced usergrouping,user-scheduling, and precoding. Traditionally, multiuserMIMO scheduling focuses solely on spectral-efficiency .That is, the scheduler will strike to balance the cell-edge userspectral-efficiency as well as the cell-average spectral-efficiency.Similar to spectral-efficiency, energy-efficiency is becoming increasinglyimportant for wireless communications. The energyefficiency is measured by a classical measure, “throughput perJoule”, while both RF transmit power and device electronic circuitpower consumptions are considered. In this paper, an energyefficientproportional-fair scheduling is proposed for downlinkmulti-user MIMO systems. To specific, the scheduling algorithmis proposed to balance cell-edge energy-efficiency and the cellaverageenergy-efficiency. The energy-efficient proportional-fairmetric is defined and the optimal power allocation maximizingthe performance measure is identified. System level evaluationsuggests that multi-user MIMO could improve the energyefficiencyof a wireless communication system significantly.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. 4390-4394 p.
energy efficient, MIMO, multi-user, downlink, scheduling
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-107382DOI: 10.1109/ICC.2012.6363935ScopusID: 2-s2.0-84871958515ISBN: 978-1-4577-2051-2OAI: oai:DiVA.org:kth-107382DiVA: diva2:575655
IEEE International Conference on Communications (ICC) 10-15 June 2012, Ottawa, Canada
Projectslow-energy wireless systems
QC 201302152013-02-152012-12-112014-01-16Bibliographically approved