Ultra-Long-Range RFID-based Wake-Up Radios for Wireless Sensor Networks

This paper presents three different strategies for waking up wireless sensor network (WSN) motes via radio frequency identification (RFID). Based on our prior work on the design of augmented UHF RFID tags and ultra-sensitive RF energy harvesters, the proposed solutions significantly outperform state-of-art RFID wake-up radios (both broadcast-based and ID-based) for WSNs. Specifically, improvements up to 4.2x and 7.8x have been achieved in terms of wake-up range and wake-up delay respectively.