The real difficulty with DFS and 802.11s is what happens when a radar is
detected? All mesh nodes need to be on the same channel, so there needs
to be some consistent way of propagating a channel switch announcement
to all wireless nodes.
indeed, thats a hard question. my first hint is looking at cisco
(http://www.cisco.com/en/US/docs/wireless/technology/mesh/7.0/design/guide/MeshAP_70.pdf
-> page 169), but 80211s has't a RAP so maybe there are only some tips
for a workflow.
i think there are diffrent possibilities:
1. the MAP that has a radar detection go sleep and wait till the channel
is clear to come back -> mesh will down :/
2. the mesh has to negotiate a new free channel via bacon-frames, maybe
generating preventively a list of channel for switching?
3. some other ideas ?
is there someone at work for a DFS implementation?
volker...
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