Energy-Efficient Wake-Up Signalling for Machine-Type Devices Based on Traffic-Aware Long-Short Term Memory Prediction

Reducing energy consumption is a pressing issue in low-power machine-type communication (MTC) networks. In this regard the Wake-up Signal (WuS) technology which aims to minimize the energy consumed by the radio interface of the machine-type devices (MTDs) stands as a promising solution. However state-of-the-art WuS mechanisms use static operational parameters so they cannot efficiently adapt to the system dynamics. To overcome this we design a simple but efficient neural network to predict MTC traffic patterns and configure WuS accordingly. Our proposed forecasting WuS (FWuS) leverages an accurate long-short term memory (LSTM)-based traffic prediction that allows extending the sleep time of MTDs by avoiding frequent page monitoring occasions in idle state. Simulation results show the effectiveness of our approach. The traffic prediction errors are shown to be below 4% being false alarm and miss-detection probabilities respectively below 8.8% and 1.3%. In terms of energy consumption reduction FWuS can outperform the best benchmark mechanism in up to 32%. Finally we certify the ability of FWuS to dynamically adapt to traffic density changes promoting low-power MTC scalability.