Pre-phase Improvement For Distributed Spectrum Sensing in Cognitive Radio Networks

Ying Dai, Jie Wu
2014 EAI Endorsed Transactions on Mobile Communications and Applications  
This paper considers a pre-phase of spectrum sensing in cognitive radio networks (CRNs), which is about how to choose a channel for spectrum sensing. We take the time dimension, spectrum dimension, and spacial dimension into account and propose a sense-in-order model. In this model, each node maintains four states regarding each channel, based on the neighbors' shared information. We construct a state transition diagram for the four states and design an algorithm for every node to calculate the
more » ... de to calculate the probability of choosing each channel. Extensive simulation results testify to the performance of our model. In addition, we conduct experiments on the USRP/Gnuradio testbed to prove the main part of the sense-in-order model with directional antennas. Experimental results show that the average success percentage under the settings of the testbed is above 70%.
doi:10.4108/mca.1.4.e2 fatcat:o7zyat2mebei7cadlt6rvcqv7e