Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2003-04-02
2009-10-20
Milord, Marceau (Department: 2618)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S250000, C370S343000, C370S342000, C370S441000, C370S474000, C370S480000, C370S468000, C342S057000, C342S195000, C342S159000, C342S192000, C455S063100, C455S296000, C455S423000, C455S067130
Reexamination Certificate
active
07606193
ABSTRACT:
Various regulatory domains promulgate standards to define how wireless devices should operate in certain frequency bands. The 5 GHz spectrum is of particular importance to certain regulatory domains because of radar systems also operating in this spectrum. To avoid interference with such radar systems, wireless devices operating in this spectrum should be able to detect radar and quickly vacate any channels currently used by the radar systems. Techniques are provided for performing startup scans for radar, identifying backup channels for a possible channel switch, and efficiently changing channels in the event of radar detection in the operating channel. These techniques advantageously meet current regulatory standards governing DFS while minimizing network startup delays and disruption to users during a radar event.
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Green Michael R.
McFarland William J.
Atheros Communications Inc.
Bever Hoffman & Harms LLP
Harms Jeanette S.
Milord Marceau
LandOfFree
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