Techniques for improving ranging between electronic devices
US11378672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2021 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Feb 5, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W56/0035
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mobile device may receive a plurality of timestamps, wherein the plurality of timestamps indicate sending and receiving time for ranging packets and response packets. The mobile device may calculate a responder turn-around time as a first difference between the second time and the first time. The mobile device may calculate a responding round trip time as a second difference between the second time and the third time. The mobile device may receive from the electronic device an initiator turn-around time and an initiator round trip time. The mobile device may calculate a frequency offset for the wireless protocol using the responder turn-around time, the responding round trip time, the initiator turn-around time, and the initiator round trip time. The mobile device may compare an observed frequency offset to the calculated frequency offset to determine a frequency offset difference and whether it exceeds a threshold, adjusting a ranging measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.