A Long-Range Directional Wake-Up Radio for Wireless Mobile Networks

Abstract

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.

Green and Sustainable Industrial Internet of Things Systems Leveraging Wake-Up Radio to Enable On-Demand IoT Communication

“…Whereas some of these nodes operate on unlicensed frequencies bands [22] used by low-power wide area networks (LPWANs) such as LoRa [9,[23][24][25][26], others use frequencies shared with a power transmitter [9], with Wi-Fi [27] or with a dedicated WuR IC [28]. Using LoRa or unlicensed WLAN frequencies enables building upon a well-established protocol and public communication infrastructure.…”

“…Energy consumption widely varies depending on a large number of factors, such as range, frequency, and implementation technology. Long-range solutions [25,27] are the most energy-hungry implementations due to the power needed to amplify weak longrange signals. In particular, the implementation technology used strongly influences power consumption.…”