On 7 May 2014 13:50, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > On Wed, 2014-05-07 at 13:43 +0200, Michal Kazior wrote: > >> We can't really guarantee how long we'll need to stop beaconing for. >> >> Assume: AP+STA. Start AP CSA bcn_int=100ms, cs_count=5. While CSA >> progresses STA receives cs_count=100 (with bcn_int=100ms). >> >> This is all theory and in practice you won't get cs_count that big and >> the lag greater shouldn't be greater than 5 or 6 beacon intervals. Is >> that an "extended" period of time? I don't know. Should we even worry >> about this? I don't think so. > > I'm not sure why we'd even allow this to start with though. We should be > able to sync it to 1 beacon interval, it seems? Particularly if we start > the switches together. There's no guarantee your AP and STA's AP will finish CSA in sync. So you either (1) prolong your stay on the (old) channel until STA's AP completes CSA, or (2) you switch your STA interface prematurely, (3) or you simply disconnect STA interface if you can't have a really tight sync. Michał -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
