Abstract
Spectrum allocation is a key research problem for cognitive radio (CR) networks. However, most existing graphbased algorithms focus only on spectrum allocation and don’t take power control into consideration. In this paper, a novel joint spectrum allocation and power control algorithm called cost and connection degree based (CCB) algorithm in cognitive radio networks is proposed. A new utility function is designed to describe the system total utility in our system model. Simulation results show that CCB algorithm performs better than the traditional algorithm both in QoS requirements of secondary users (SUs) and in the numbers of satisfied users.
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