Set wireless channel busy

[Raghavendra <arrao@cdac.in>]

Hello,

I am developing a module which adds the support for IEEE 1609.4 for 
WAVE(Wireless Access for vehicular environments) in mac80211. One of the 
specifications of 1609.4 is channel access in alternate fashion, i.e. I 
need to switch between two channels alternatively, giving 50ms to each 
of the channel.

For the switching, the document suggests a guard band of 4ms, where in 
which I need to make sure that no transmissions are taking place during 
the guard band. Now my question is: How do I suspend the 
transmissions(although, the packets could be queued and the reception 
could remain on) of a wlan device for a certain amount of time?

Thanks and Regards,
Raghavendra

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