公开(公告)号：US10320860B1

公开(公告)日：2019-06-11

申请号：US14749445

申请日：2015-06-24

Applicant: Google LLC

Inventor： 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

IPC: G06F15/16 ,  H04L29/06 ,  H04L29/08

Abstract: 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.