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In cognitive networks, cognitive radios utilize spectrum sensing technology to avoid interference to primary users. There are two important factors associated with spectrum sensing: detection probability and false alarm probability. The higher the detection probability, the better the primary users are protected. On the other hand, for cognitive radios the lower the false alarm probability, the more...
In this paper, an Opportunity Spectrum Access (OSA) strategy for multiuser was proposed. Assuming each CR user only can sense one channel at a time due to hardware restraints. And they only can sense one time during a slot time. The idle probability of each channel is predicted by the POMDP framework. If all CR users use the same OSA strategy with deterministic POMDP framework, collision will happen...
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