Distance assessment with headerless packets
US12287394B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2022 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Jan 17, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/71634
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Aspects of the present disclosure are directed to communicating data for authentication and location determination, such as for authenticating a key FOB and locating the key FOB within a defined distance. As may be implemented in accordance with one or more embodiments, a plurality of headerless packets, respectively including scrambled timestamp sequence (STS) packets but not including encoding and/or synchronization headers, are communicated between respective communication circuits. A time of flight (TOF) value indicative of time elapsed between transmission and reception of the plurality of headerless packets is assessed based on the STS packets. A distance between the communication circuits is determined based on the assessed time of flight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.