Dynamic frequency selection with recovery for a basic service set network
US7120138B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2002 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Nov 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Dynamic frequency selection for an IEEE 802.11 basic service set network is enabled by a dynamic frequency selection (DFS) element within beacon and probe response frames defining a DFS owner, a DFS interval specifying the time until channel switch in beacon intervals, a DFS count specifying a time in beacon intervals until the DFS owner initiates selection of the next channel frequency from the supported channel set, and a DFS recovery interval specifying a time after the end of the DFS interval when recovery procedures are initiated if no channel switch information was received during that DFS interval. Channel switch information is presented in beacons following the end of the channel selection process, and within beacons during the DFS recovery interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.