Radio-Triggered Wake-Up for Wireless Sensor Networks
Real-Time Systems
Proceedings of the 5th international conference on Embedded networked sensor systems
A prototype low-cost wakeup radio for the 868 MHz band
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SENSORCOMM '09 Proceedings of the 2009 Third International Conference on Sensor Technologies and Applications
Wake-up receivers for wireless sensor networks: benefits and challenges
IEEE Wireless Communications
A method to prolong the lifetime of wireless sensor network
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Low-Power Wake-Up Radio for Wireless Sensor Networks
Mobile Networks and Applications
RFID Based Acoustic Wake-Up System for Underwater Sensor Networks
MASS '11 Proceedings of the 2011 IEEE Eighth International Conference on Mobile Ad-Hoc and Sensor Systems
Time-Knocking: A novel addressing mechanism for wake-up receivers
WIMOB '12 Proceedings of the 2012 IEEE 8th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
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Energy-efficient operation is a challenge for wireless sensor networks (WSNs). A common method employed for this purpose is duty-cycled operation, which extends battery lifetime yet incurs several types of energy wastes and challenges. A promising alternative to duty-cycled operation is the use of wake-up radio (WuR), where the main microcontroller unit (MCU) and transceiver, that is, the two most energy-consuming elements, are kept in energy-saving mode until a special signal from another node is received by an attached, secondary, ultra-low power receiver. Next, this so-called wake-up receiver generates an interrupt to activate the receiver node's MCU and, consequently, the main radio. This article presents a complete wake-up radio design that targets simplicity in design for the monetary cost and flexibility concerns, along with a good operation range and very low power consumption. Both the transmitter (WuTx) and the receiver (WuRx) designs are presented with the accompanying physical experiments for several design alternatives. Detailed analysis of the end system is provided in terms of both operational distance (more than 10 m) and current consumption (less than 1 μA). As a reference, a commercial WuR system is analyzed and compared to the presented system by expressing the trade-offs and advantages of both systems.