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Dynamic Resource Allocation for Spectrum Sharing
in Infrastructure-Based Cognitive Radio Networks Won-Yeol Lee and I. F. Akyildiz
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Abstract
Cognitive radio (CR) networking achieves high
utilization of the scarce spectrum resources without causing
any performance degradation to the licensed users. Since the
spectrum availability varies over time and space, CR networks
are required to have a dynamic spectrum sharing capability. This
allows fair resource allocation as well as capacity maximization
and avoids the starvation problems seen in the classical spectrum
sharing approaches. In this paper, a spectrum sharing framework
for infrastructure-based CR networks is proposed that addresses
these concerns by (i) opportunistically negotiating additional
spectrum based on the licensed user activity (exclusive allocation),
and (ii) having a share of reserved spectrum for each cell
(common use sharing). Our algorithm consists of inter-cell and
intra-cell spectrum sharing schemes, which account for the
maximum cell capacity, minimize the interference caused to
neighboring cells, and protect the licensed users. Simulation
results reveal that the proposed spectrum sharing framework
achieves better fairness and higher network capacity than the
conventional spectrum sharing methods.
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Last modified on Nov/17/2008