Two-pass copresence
US9386417B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2015 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | May 24, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/54
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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: process one or more signals to determine coarse grain location information of a first device and a second device; determine whether the first device and the second device are copresent based on the coarse grain location information; in response to determining that the first device and the second device are copresent based on the coarse grain location information, transmit a signal to the second device to alert the second device to listen for a fine grain copresence token from the first device; and refine copresence based on receiving an indication that the second device has received the fine grain copresence token.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.