Analysis of Active Spectrum Handoff Effect Based on Cooperative Spectrum Prediction

摘要

In the cognitive radio network environment, because the sub-user opportunistic use of "spectrum hole" to communicate, resulting in the inevitable uninterrupted system for spectrum switching, and frequent spectral switching system performance significantly reduced. In this paper, an active spectrum switching method based on improved cooperative spectrum prediction is proposed based on the existing active spectrum switching based on single user prediction. This method can effectively improve the performance of spectrum switching by introducing the cooperative prediction module into the frame structure and the idea of dividing the frame structure frequency domain. Based on the experimental simulation, it is proved that the performance of the method is improved compared with the traditional single-user prediction active spectrum switching method and the periodic spectrum sensing switching method, the average switching delay, channel switching frequency and collision rate and other performance indicators have been effectively improved.