Receiver Design for Realizing On-Demand WiFi Wake-Up Using WLAN Signals
Source: Kansai University
In this paper, the authors design a simple, low-cost, and low-power wake-up receiver which can be used for an IEEE 802.11 - compliant device to remotely wake up the other devices by utilizing its own Wireless LAN (WLAN) signals. A typical usage scenario of such a wake-up receiver is energy management of WiFi device: a device equipped with the wake-up receiver turns WiFi interface off when there is no communication demand, which is powered - on only when the wake-up receiver detects a wake-up signal transmitted by the other WiFi device. The employed wake-up mechanism utilizes the length of 802.11 data frame generated by a WiFi transmitter to differentiate the information conveyed to the wake-up receiver.