Tracking a radio beacon indoor
US12253614B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Oct 25, 2022 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Oct 21, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and devices are disclosed, for tracking a radio beacon at a mobile device, using short range RF signals, emitted by the beacon and detected at the mobile device, typically indoor, requiring no GNSS service. According to the disclosed method, the beacon is configured to broadcast short bursts, at a carefully structured difference in time of emission (DTOE), while at the tracking device, the difference in time of arrival (DTOA) of said signals is measured, and along with the DTOE, used to accurately determine the location of and direction to the beacon relatively to the tracking device. According to a preferred embodiment of the present invention, said short range RF signals are associated with Bluetooth advertising, configured to broadcast in 1-way, requiring no pairing and no connection from the tracking device, and practically not requiring a receiver at the beacon, therefor saving battery energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.