WCDMA for UMTS: HSPA Evolution and LTE
WCDMA for UMTS: HSPA Evolution and LTE
Challenges of real-time secondary usage of spectrum
Computer Networks: The International Journal of Computer and Telecommunications Networking
A Framework for Unified Spectrum Management (USM) in Heterogeneous Wireless Networks
IEEE Communications Magazine
A survey on spectrum management in cognitive radio networks
IEEE Communications Magazine
Cognitive functionality in next generation wireless networks: standardization efforts
IEEE Communications Magazine
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
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This paper proposes spectrum sharing algorithms between two Universal Mobile Telecommunication System (UMTS) operators in order to improve underutilization of the spectrum. Furthermore, it investigates the call setup delays present in the proposed Fixed Spectrum Allocation (FSA) and Dynamic Spectrum Allocation (DSA) schemes, and the associated messages involved. The spectrum efficiency gains of the proposed algorithms are obtained by simulations. The impact of the queuing and call setup messages on the overall algorithm performance is also discussed. It is shown that due to the proposed techniques, spectrum sharing gain of about three percent (3%) is possible at an operating point of 98% satisfaction ratio, when the impact of the call setup messages is considered.