GPS-assisted collaborative and signaling-aided WLAN DFS operation
Abstract:
Disclosed are methods and systems for a WLAN device to select an operating dynamic frequency selection (DFS) channel that minimizes the probability of radar interference by using aiding information. The aiding information may be a crowd-sourced database of geo-tagged radar zones including one or more DFS channels used within the geo-tagged radar zones that are detected by a plurality of WLAN devices. The WLAN device may query the crowd-sourced database for a geo-tagged radar zone that is nearby to determine if a radar operates on an overlapping DFS channel so it may switch to a different channel. In one aspect, the aiding information may be periodic special action frames broadcast by a WLAN beaconing device over the operating channel of the WLAN device. The special action frames may carry information on one or more channels used by a near-by radar and recommended alternative channels to use by the WLAN device.
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