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• W15696939 abstract "A study by Federal Communication Commission shows that most of the spectrum in current wireless networks is unused most of the time, while some spectrum is heavily used. Recently dynamic spectrum access (DSA) has been proposed to solve this spectrum inefficiency problem, by allowing users to opportunistically access to unused spectrum. One important question in DSA is how to efficiently share spectrum among users so that spectrum utilization can be increased and wireless interference can be reduced. Spectrum sharing can be formalized as a graph coloring problem. In this report we focus on surveying spectrum sharing techniques in DSA networks and present four representative techniques in different taxonomy domains, including centralized, distributed with/without common control channel, and a real case study of DSA networks --DARPA neXt Generation (XG) radios. Their strengths and limitations are evaluated and compared in detail. Finally, we discuss the challenges in current spectrum sharing research and possible future directions. Comments University of Pennsylvania Department of Computer and Information Science Technical Report No. MSCIS-09-11. This technical report is available at ScholarlyCommons: http://repository.upenn.edu/cis_reports/907 Spectrum Sharing In Dynamic Spectrum Access Networks WPE-II Written Report" @default.
• W15696939 created "2016-06-24" @default.
• W15696939 creator A5091524023 @default.
• W15696939 date "2009-01-01" @default.
• W15696939 modified "2023-09-27" @default.
• W15696939 title "Spectrum Sharing in Dynamic Spectrum Access Networks: WPE-II Written Report" @default.
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• W15696939 hasPublicationYear "2009" @default.
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