Method and apparatus for using 802.11 WLANs in TV white space
US9185455B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2011 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Apr 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/440218
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for using 802.11 Wireless LANs in TV white space are provided that additionally allows coexistence with non-802.11 devices in the same spectrum space. The method and apparatus extend concepts used in traditional 802.11 applications in the MAC and PHY layers so that WLANs can function over TV white space channels. The method and apparatus also facilitates coexistence of non 802.11 devices and existence with other 802.11 applications by extending the Enhanced Distributed Channel Access mechanism used to provide quality of service. An OFDM system with fixed subcarrier spacing is suggested to accommodate spectrum characteristics (variable center frequency and channel bandwidth) of the TVWS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.