Control mode PHY for WLAN
US8885740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2012 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Aug 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26132
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A first preamble for a first data unit includes a first long training field and a first signal field modulated according to a first technique. The first data unit is generated according to a first data unit format and includes the first preamble. A second preamble, generated for a second data unit, includes a second signal field and a second long training field. Information in the second signal field is repeated and/or the second long training field is generated so that a duration of the second long training field is longer than a duration of the first long training field. A portion of the second signal field is modulated according to a second technique or a portion of the second long training field is modulated according to the second technique to signal to a receiver that the second data unit is formatted according to a second data unit format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.