Locating a WLAN station using signal propagation delay
US7996020B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2011 |
| Grant date | Aug 9, 2011 |
| Priority date | — |
| Expiry date | Jan 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A wireless network device including: a first RF transceiver module configured to (i) for a predetermined number of times, transmit a data frame to a second RF transceiver module, and (ii) for each data frame transmitted to the second RF transceiver module, receive an acknowledgement frame from the second RF transceiver module after a respective delay period; a timing module configured to generate a timer value corresponding to an accumulated delay period, wherein the accumulated delay period corresponds to each of the respective delay periods; and a control module configured to (i) determine the predetermined number of times that the first RF transceiver transmitted the data frame to the second RF transceiver based on a resolution of the timing module, and, (ii) determine an actual delay period based on (a) the timer value and (b) the predetermined number of times.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.