Process for detection of a portable user device in a predetermined zone on the inside of or on the outside of a vehicle by ultra high frequency, associated detection device and associated user device
US11203323B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 7, 2019 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Jun 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/63
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for detecting a portable user device in a predetermined zone on the inside or outside of a vehicle by a detection device onboard the vehicle. The high-frequency, BLE type communication includes a first signaling mode and a second communication mode, the first mode including: positioning the portable device at a predetermined fixed distance from the detection device, transmitting a signal by the detection device with predetermined transmission power on a channel. As long as the detection device is receiving a response signal from the portable device, repeating transmission of the signal at the same transmission power on other channels, otherwise, repeating transmission of the signal on a channel with reduced transmission power, and if the detection device no longer receives a response signal, comparing the transmission power to a predetermined threshold transmission power, and applying a correction to the transmission power during the second mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.