Change 5GHz channel to a DFS channel

Question

Change 5GHz channel to a DFS channel

Closed this issue 7 years ago · 6 comments

Our default channel 165 is overused. There's too much interference.

I think we should change the default channel to a DFS channel. It Makes a huge difference in speed, due to lack of interference. I've been using 124. Should probably use one that Link NYC isn't using so much.

Answer 1 · 2017-12-05T11:33:14.000Z

Don't we need to have something that disables DFS when needed? Like we listen for a DFS beacon, and turn it off?

Answer 2 · 2017-12-05T17:34:57.000Z

NanoStations are FCC compliant, wouldn't they do this automatically in hardware?

Answer 3 · 2017-12-05T17:39:41.000Z

Wouldn't there be a risk of it changing channels if radar is detected? Does image scan for the backbone mesh network if the channel changes?

Answer 4 · 2017-12-05T17:55:58.000Z

Hm, couldn't find much by googling. It seems that the NSM5 does a scan on startup to make sure the DFS channel is free. Not sure how this works with OpenWrt. All the Manhattan Link NYC kiosks seem to use DFS. I should email and ask them how that works. I think radar is only a problem near the airports.

Answer 5 · 2017-12-07T10:18:30.000Z

I know that portalwifi heavily advertises that they scan DFS not just on startup but during operation in case of emergency. I would love to use DFS but only after testing that we respect the emergency airwaves.

Answer 6 · 2018-02-19T21:06:36.000Z

Probably not a good idea for default :-(