nanog mailing list archives
Re: WiFI on utility poles
From: Jared Mauch <jared () puck nether net>
Date: Thu, 10 Sep 2015 21:16:07 -0400
On Sep 10, 2015, at 1:47 PM, Michael Englehorn <michael () englehorn com> wrote: My issue with the "free" wifi that comcast is forcing into our homes and businesses is that it's also interfering with our own access points in the same building!
[resending due to hitting limit on file size to nanog list] This is the biggest problem I’ve seen regarding this. If you care about 5ghz please provide feedback about the LTE-U stuff and encourage the cablewifi, wayport, etc to do a proper listen-before-use similar to what is required with DFS to avoid interference. Here’s a sample of what a spectrum might look like: http://puck.nether.net/~jared/airview_20150910_210354.png and http://puck.nether.net/~jared/airview_20150910_211313.png You can clearly see things at the various frequencies but without looking at the waveform you may not see the 40mhz user and where their center frequency is. If they are just sending beacons it may look different. A “site survey” isn’t a spectrum view as your receiver may not understand what is going on. This is the UBNT 5ghz AC radio which is quite handy, but it as it’s an 802.11 device it may not see other things that use the ISM band and aren’t 802.11 based. These do exist, eg: mimosa b5, af-5/af-5x. These may use different frequencies for TX vs RX as well. Either way, I figure this is interesting enough to share if you aren’t doing WISP stuff or looking at spectrum often. - Jared
Current thread:
- Re: WiFI on utility poles, (continued)
- Re: WiFI on utility poles Phil Bedard (Sep 09)
- Re: WiFI on utility poles Mike Lyon (Sep 09)
- Re: WiFI on utility poles Mike Hammett (Sep 09)
- Re: WiFI on utility poles Livingood, Jason (Sep 10)
- Re: WiFI on utility poles Michael Englehorn (Sep 10)
- Re: WiFI on utility poles Mike Lyon (Sep 10)
- Re: WiFI on utility poles Jim Popovitch (Sep 10)
- Re: WiFI on utility poles Hunter Fuller (Sep 10)
- Re: WiFI on utility poles Jim Popovitch (Sep 10)
- Re: WiFI on utility poles Hunter Fuller (Sep 10)
- Re: WiFI on utility poles Phil Bedard (Sep 09)
- Re: WiFI on utility poles Jared Mauch (Sep 10)
- Re: WiFI on utility poles Mike Hammett (Sep 10)
- Re: WiFI on utility poles John Levine (Sep 09)
- Re: WiFI on utility poles Philip Dorr (Sep 09)
- Re: WiFI on utility poles Chris Boyd (Sep 10)
- Re: WiFI on utility poles Livingood, Jason (Sep 10)
- Re: WiFI on utility poles Mike Hammett (Sep 10)
- Re: WiFI on utility poles Shane Ronan (Sep 10)
- Re: WiFI on utility poles Matt Hoppes (Sep 10)