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Resource Distribution Approaches in Spectrum Sharing Systems

Yamada, Takefumi; Burgkhardt, Dennis 1; Cosovic, Ivan; Jondral, Friedrich K. 1
1 Communications Engineering Lab (CEL), Karlsruher Institut für Technologie (KIT)

Abstract:

It is increasingly difficult to satisfy growing demands for spectrum with the conventional policy of fixed spectrum allocation. To overcome this problem, flexible/dynamic spectrum sharing methods that can significantly improve spectrum utilization of the spectrum have gained increasing interest recently. This paper presents two dynamic spectrum sharing approaches, a centralized and a decentralized one. The centralized approach is based on hierarchical trading. Each level of hierarchy is composed of "markets" that are associated with a certain spatial area and trading occurrence frequency, whereas area size and trading occurrence frequency depend on the hierarchy level. The decentralized approach is based on game-theory. There, it is assumed that the operators are averse to unequal payoffs and act unselfishly, enabling a stable and sustainable community. Numerical results show that, in the observed scenario, both proposals outperform the reference case of fixed resource allocation significantly in terms of utilized bandwidth. Whereas, negotiation costs for spectrum brokerage appear in the centralized approach, nonnegligible amounts of spectrum are lost in the decentralized approach due to collisions. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000010649
Originalveröffentlichung
DOI: 10.1155/2008/598080
Scopus
Zitationen: 10
Web of Science
Zitationen: 8
Dimensions
Zitationen: 12
Cover der Publikation
Zugehörige Institution(en) am KIT Communications Engineering Lab (CEL)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2008
Sprache Englisch
Identifikator ISSN: 1687-1472, 1687-1499
KITopen-ID: 1000010649
Erschienen in EURASIP journal on wireless communications and networking
Verlag Hindawi
Band 2008
Seiten Art.Nr. 598080
Nachgewiesen in Scopus
Web of Science
Dimensions
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