Utility Patent Grant (B1)
June 11, 2019
Source: USPTO via Sqoop
Assignees: Google LLC
Inventors: Andrew Ames Bunner, Alan Lee Gardner, III, Mohammed Waleed Kadous, Brian Patrick Williams, Marc Stogaitis, Nadav Aharony, Brian Duff, Pascal Tom Getreuer, Zhentao Sun, Daniel Estrada Alva, Ami Patel, Benjamin Razon, Richard Daniel Webb, Tony Weber, Thomas Yuchin Chao, Ryan Michael Rifkin, Richard Francis Lyon, Liem Tran, Joseph A. Farfel
The disclosure includes a system and method for detecting fine grain copresence between users. The system includes a processor and a memory storing instructions that when executed cause the system to: transmit a wakeup signal to a plurality of devices based on coarse grain location information; send a request to a first device of the plurality of devices to transmit a token using a first communication technology to determine fine grain copresence; receive a first token acknowledgment from a first subset of the plurality of devices; send a request to a second device of the first subset of the plurality of devices to transmit the token using a second communication technology to determine fine grain copresence; receive a second token acknowledgment from a second subset of the plurality of devices; and refine copresence based on receiving the first and second token acknowledgment.