Wireless communication between devices requires the devices to be active at the same time. Wireless pairing and authenticating of devices (e.g., via Bluetooth) currently requires each device to be in a sharing mode or to be connected to the same network, which can consume device battery and requires specific user action. This disclosure describes techniques that, with user permission, automatically wake a device to communicate with another device based on ultrasound signals received from the other device. The received signal can also be interpreted as an intent for an action, if permitted by the user. The described techniques are suitable even when target devices are unknown , can limit communication to a physical ranger, and are suitable even in situations where the devices that communicate do not have a network connection.
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N/A, "Automatic Device Wake and Authentication Based On Ultrasound", Technical Disclosure Commons, (September 21, 2020)