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open80211s
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DFS support #31

Open skydiablo opened 11 years ago

skydiablo commented 11 years ago

DFS support for 5GHz?

chunyeow commented 11 years ago

As far as I understand, I think nope.

On Tue, Aug 13, 2013 at 4:10 AM, Volker notifications@github.com wrote:

DFS support for 5GHz?

— Reply to this email directly or view it on GitHubhttps://github.com/cozybit/open80211s/issues/31 .

skydiablo commented 11 years ago

so open80211s without DFS is useless for outdoor in 5GHz ...

westbywest commented 11 years ago

It looks like DFS is work in progress for the linux-wireless driver which open80211s would presumably depend upon. Your concern would thus apply not just to open80211s but to to all 5.8GHz radios using these drivers (that don't already implement radar detection at the hardware level). http://wireless.kernel.org/en/developers/DFS

skydiablo commented 11 years ago

so, who has to implement the DFS support for open80211s? it is the hw-driver, mac80211, hostap or open80211s self? or all together? sry, but i want to understand the real problem,... DFS is already supported for AP-mode, but didnt for mesh :S

westbywest commented 11 years ago

Due to whichever HW driver you are using having already implemented DFS for AP mode, I would expect that driver's author(s) to be the best person to ask. So, for mac80211 drivers, I'd recommend asking on the linux-wireless listserv about possibility of porting DFS into 802.11s/mesh mode (or just ask about any existing efforts to do that). Linux-wireless has a much larger developer community behind it than open80211s, and since these are all still Open Source project that rely heavily on volunteer effort, that venue may have more information for you.

That said, I can unfortunately relay that even some commercial driver implementations like Ubiquiti's are known to have incomplete DFS support.

chunyeow commented 11 years ago

DFS requires mesh channel switching to be implemented. In case, one of the nodes detected with Radar interference, it needs to propagate channel switching announcement frame via action frame, or beacon frame, or probe response frame to all the mesh STAs in the joined mesh network to switch to a new freq.

On Tue, Aug 13, 2013 at 2:12 PM, Ben West notifications@github.com wrote:

Due to whichever HW driver you are using having already implemented DFS for AP mode, I would expect that driver's author(s) to be the best person to ask. So, for mac80211 drivers, I'd recommend asking on the linux-wireless listserv about possibility of porting DFS into 802.11s/mesh mode (or just ask about any existing efforts to do that). Linux-wireless has a much larger developer community behind it than open80211s, and since these are all still Open Source project that rely heavily on volunteer effort, that venue may have more information for you.

That said, I can unfortunately relay that even some commercial driver implementations like Ubiquiti's are known to have incomplete DFS support.

— Reply to this email directly or view it on GitHubhttps://github.com/cozybit/open80211s/issues/31#issuecomment-22597959 .

skydiablo commented 11 years ago

i think all events are already there (hw-driver, mac80211), only open80211s has to implement this feature?