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This article investigates the problem of distributed channel selection in opportunistic spectrum access (OSA) system in which the channel states varying from slot to slot due to the influence of fading. The existing work considering with timevarying environment supposed users can receive a reward after successful contention of a channel. This assumption is not conformed to the realistic dynamic channel...
Opportunistic spectrum access (OSA) is a key technique enabling the secondary users (SUs) in a cognitive radio (CR) network to transmit over the “spectrum holes” unoccupied by the primary users (PUs). In contrast to OSA, with spectrum sharing (SS) is allowed to transmit regardless of the PU's on/off status, provided that the resulting interference to PU is kept below a predefined threshold. In this...
Opportunistic spectrum access (OSA) has been regarded as the most promising approach to solve the paradox between spectrum scarcity and waste. Intelligent decision making is key to OSA and differentiates it from previous wireless technologies. In this article, a survey of decision-theoretic solutions for channel selection and access strategies for OSA system is presented. We analyze the challenges...
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