Time of flight based security for multiple key fobs
US11624214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2020 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Jan 1, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2111
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system for passive locking and unlocking a vehicle is described that includes a memory for storing executable instructions and a processor configured to execute the instructions to unlock the vehicle using a time of flight to transmit the trigger request between the vehicle and the first key fob. The processor receives, from a first key fob, a trigger request to unlock the vehicle, and determines, based key fob identifiers that identify the first key fob and a second key fob that is also near the vehicle, that the first and second key fobs are associated with a vehicle. The processor selects the first key fob based on a key fob characteristic. The processor evaluates the time of flight using the first key fob, and unlocks the vehicle based on the time of flight satisfying a threshold for signal transmission flight time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.