A Comprehensive Study of Passive Wake-up Radio in Wireless Sensor Networks

Wake-up radio, as a secondary radio transceiver, is implemented to monitor the channel condition so that the main radio can be turned off when there is no communication activity. This thesis work focuses on the analysis of passive wake-up radio (PWUR), where the wake-up radio is entirely powered by the wake-up signal and does not need any additional battery supply. The work covers PWUR’s both hardware implementation and performance analysis. In particular, we analyze some typical issues when PUWR is adopted into the ZigBee networks. Our results show that implementing PWUR in ZigBee networks improves latency and energy consumption compared to traditional duty cycling approaches except at the highest packet rates. Also, the addition of PWUR improves the ZigBee network throughput by introducing the wake-up delay to the CSMA/CA process.