DBA gates the actual beacon transmit - if there's no beacon in the
slot, then it's fine.
SWBA is the software timer that fires just before DBA, so the software
stack has a chance to program the hardware with a beacon and let the
hardware get the packet DMA -> TX FIFO setup all correctly so that
when it's DBA time (ie, time to /transmit/ the beacon), it's already
ready to go.
On 18 February 2015 at 09:09, bh <u...@163.com> wrote:
> Dear Adrian
> In ath_intr , there are a variable which decrease every swba, so when
> the variable swbaintalval is zero, ap will send beacon .So I think the
> period of swba is slot time, ap will send beacon every five slot, the beacon
> interval is five slottime?
> Adrian Chadd <adr...@freebsd.org>编写：
>>On 18 February 2015 at 07:55, bh <u...@163.com> wrote:
>>> The default slotcnt=2 , becntival=5.For ap it will generate SWBA every
>>> slot,it will send beacon every five slots, beacause ap fire the DBA timer
>>> in every slot, so it will send data package in every slot. Is my above
>>> understanding correct?
>>It generates SWBA every beacon interval, which is calculated in
>>Master stations beacon 20 times a second with the default config
>>specified by the wiki.
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