© 2015 by the authors; licensee MDPI, Basel, Switzerland. This paper describes a long-range directional wake-up radio (LDWuR) for wireless mobile networks. In contrast to most wake-up radios (WuR) to date, which are short range, ours is applicable to long-range deployments. Existing studies achieve long distance by using modulation and coding schemes or by directional antennas, though the latter require exploring the direction of the transmitter. To address this issue, our LDWuR adopts both static and dynamic antennas, where the static ones are directional, while the dynamic ones are omnidirectional for beamforming. We present our LDWuR prototype and design principle. Simulation results show that our LDWuR and event-driven MAC protocol suppress the idle-listening of Wi-Fi stations in a wireless network, thereby enhancing the Wi-Fi power savings.
Shih, W.-C., Jurdak, R., Abbott, D., Chou, P., & Chen, W.-T. (2015). A Long-Range Directional Wake-Up Radio for Wireless Mobile Networks. Journal of Sensor and Actuator Networks, 4(3), 189–207. https://doi.org/10.3390/jsan4030189