Channel assignment based on predictions of sensing result and channel occupancy rate in PhyC-SN

In the physical wireless parameter conversion sensor network (PhyC-SN), the sensor controls the frequency of carrier according to the sensing result and all the nodes inform the sensing results to the fusion center, simultaneously. The dynamic range of sensing result which node sends to FC depends on the available channels of frequency spectrum. In spectrum sharing to the other system (primary system), PhyC-SN (secondary system) considers the assignment between the quantization level of digital sensing result and the channel of frequency spectrum. In this paper, for constructing this assignment, the fusion center collects two types of tendencies. First one is the sensing results. The mean and variance value of sensing results can be estimated by data tracking technique. Second one is a channel occupancy rate (COR). From COR, the fusion center predicts the probability of finding non-occupied channel. The fusion center can construct the assignment map based on minimum mean square error between the predicted sensing result and the exact one. As a result, the constructed assignment achieves the high spectrum usage efficiency.