Multi-Step Spectrum States Prediction Based on Long Short-Term Memory

To support increasing number of wireless devices under limited spectrum resources, it is of great significance to explore more efficient spectrum usage strategies. In this paper, a spectrum states prediction approach based on long short-term memory (LSTM) has been proposed to reduce latency and improve spectrum efficiency. We first determine the threshold adaptively by the kernel density estimation (KDE) method, and then data preprocessing is performed on the retrieved dataset. After that, the preprocessed data is fed into the LSTM network for training and validation. The proposed scheme is capable of single-step and multi-step prediction with different time resolutions. At last, simulation results are presented and discussed to show the effectiveness of the proposed approach. By taking advantage of the information in historical data, the devices can perform channel pre-selection and avoid conflict efficiently.