Dynamic frequency selection with recovery for a basic...

Details Dynamic frequency selection with recovery for a basic... Dynamic frequency selection with recovery for a basic...

2006-10-10

2006-10-10

Ngo, Ricky Q. (Department: 2616)

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

C370S329000, C370S487000

Reexamination Certificate

active

07120138

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.

REFERENCES:
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patent: 6675012 (2004-01-01), Gray
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“Transmitter Power Control (TPC) and Dynamic Frequency Selection (DFS) Joint Proposal for 802.11h WLAN”, Mar. 12, 2002, pp. 1-16. XP002213584.

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