In many wireless sensor network scenarios, battery-powered nodes must operate for years, which necessitate the need for advanced power management of the radio. In this paper, we pursue the idea of using a second, ultra low-power radio that can be used to trigger a remote interrupt, so that a receiver can fire up its primary radio to engage in efficient high-speed communication with the sender. Wakeup radio avoids the complex bookkeeping associated with energy-efficient MAC protocols, but at the price of additional hardware. We present the first design of a low-cost wakeup radio made out of standard components. Our working prototype implementation operates in the European license-free 868 MHz band, and includes a specialised low-power microcontroller filtering out interference (e.g. GSM signals), which makes it practical for use in many real-world settings. Keywords: WSNs; wireless sensor networks; low power; link layer; experimentation; wakeup radio. Reference to this paper should be made as follows: van der Doorn, B., Kavelaars, W. and Winelis Kavelaars received a BSc degree in electrical engineering from Utrecht University in 1999, after which he started his professional career at KPN (the Dutch national telephone company). Three years later, he accepted a position as Project Leader at TNO Defense, Safety and Security. At TNO, he started and led a five-year project to develop wireless sensor network technology for military purposes, which included the development of a wireless compound security system. In 2006, he left TNO and founded SOWNet Technologies BV, which develops wireless sensor network solutions for the commercial sector. A prototype low-cost wakeup radio for the 868 MHz band 23
Doorn et al. REF , proposed a prototype to work in the 868MHz band, for achieving energy efficiency with the help of a low cost radio triggered wake-up.
A prototype low-cost wakeup radio for the 868 mhz
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Computer Science