Methods, systems and devices for providing location based services in a venue
US9547068B2 · kind B2 · utility
5Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 2014 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Feb 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/027
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed are methods, systems and devices for providing location based services in a venue. To estimate its location, in a particular implementation, a mobile device may obtain a measurement of a range to a transponder device positioned at a known location based on measurements of a signal round-trip time (RTT) in a message exchange with the transponder device. Positioning assistance data from a server may enable the mobile device to measure a delay at the transponder device in providing a response to a probe message to thereby more accurately measure the signal RTT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.