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Issue No. 07 - July (2011 vol. 10)
ISSN: 1536-1233
pp: 1042-1055
Wei Wang , Zhejiang University, Hangzhou, Beijing University of Posts and Telecommunications, Beijing and University of Michigan, Ann Arbor
Kang G. Shin , University of Michigan, Ann Arbor
Wenbo Wang , Beijing University of Posts and Telecommunications, Beijing
We propose a new framework of joint spectrum allocation and power control to utilize open spectrum bands in cognitive radio networks (CRNs) by considering both interference temperature constraints and spectrum dynamics. We first address a simpler problem for the case of a single flow. A TDM-based power-control strategy is adopted to achieve maximum end-to-end throughput by choosing an appropriate multihop route and spectrum combination for each single flow. Then, the simpler solution is extended to the multiflow case in which interflow interference and cumulative interference temperature must be considered. Considering the overhead of switching route and spectrum, the optimal waiting time before making a switch is derived. Our in-depth simulation study has shown that the proposed algorithms utilize spectrum more efficiently than other existing algorithms.
Cognitive radio networks (CRNs), multiple-hop flows, spectrum allocation, power control.

W. Wang, W. Wang and K. G. Shin, "Joint Spectrum Allocation and Power Control for Multihop Cognitive Radio Networks," in IEEE Transactions on Mobile Computing, vol. 10, no. , pp. 1042-1055, 2010.
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