Saving Energy in Cellular IoT using Low-Power Wake-up Radios

Abstract: The thesis work is based on power saving techniques to enhance the battery life of Machine Type Communication devices. The basic principle behind the introduced methods to save energy is to allow the Machine Type Communication devices only to perform its activities for a short time and go to sleep or inactive mode for rest of the time. The existing techniques save a part of device energy consumption which increases the battery life to some extent. To further improve the battery life of these devices, a low power Wake-up Receiver (WRx) is introduced additionally to wake up the power-hungry main receiver when data transfer is required. We started our analysis by evaluating the average power consumption for the existing solutions and compare them with the scenario where the wake-up receiver is integrated into the device. Different possibilities of the design of wake up signal for a wake-up receiver are studied and proposals are made for its specific use and it needs to be accommodated within the operating bandwidth in accordance with the Long Term Evolution signal parameters. The characteristics of the wake-up receiver which influences the parameters like the probability of miss, detection and false alarm are simulated with the wake-up signal designed and the results show a saving up to ninety-six percent of energy when compared to the reference cases considered in this thesis.