System and method of implementing asynchronously-clocked fixed-location devices for a distance determination by a roaming client device
US9519047B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 17, 2014 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Jul 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system of asynchronously-clocked fixed-location devices and a roaming client device can be used for a distance determination of the roaming client device. The system includes a master device, at least one slave device, and any number of roaming client devices. The master device transmits a series of pulses. Once those pulses reach the client device, the client device will begin to count the number of pulses. Once those pulses reach the slave device, the slave device will transmit an acknowledgement pulse. After the client device receives the acknowledgement pulse, the client device will stop counting the pulses from the master device. The total number of pulses counted by the client device will then be used in the distance determination of the client device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.