REACH2-Mote: a range-extending passive wake-up wireless sensor node
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A wireless sensor network that employs passive radio wake-up of the sensor nodes can reduce the energy cost for unnecessary idle listening and communication overhead, extending the network lifetime. A passive wake-up radio is powered by the electromagnetic waves transmitted by a wake-up transmitter rather than a battery on the sensor node. However, this method of powering the wake-up radio results in a short wake-up range, which limits the performance of a passive wake-up radio sensor network. In this article, we describe our design of a passive wake-up radio sensor node-REACH2-Mote-using a high-efficiency, energy-harvesting module and a very low power wake-up circuit to achieve an extended wake-up range. We implemented REACH2-Mote in hardware and performed field tests to characterize its performance. The experimental results show that REACH2-Mote can achieve a wake-up range of 44 feet. We also modeled REACH2-Mote and evaluated its performance through simulations, comparing its performance to that of another passive wake-up radio approach, an active wake-up radio approach, and a conventional duty cycling approach. The simulation results show that REACH2-Mote can significantly extend the network lifetime while achieving high packet delivery rate and low latency.
CitationChen, L., Warner, J., Yung, L., Zhou, D., Heinzelman, W., Demirkol, I., Muncuk, U., Chowdhury, K.R., Basagni, S. REACH2-Mote: a range-extending passive wake-up wireless sensor node. "ACM Transactions on Sensor Networks", 01 Novembre 2015, vol. 11, núm. 4.