WiFI on utility poles

Thu Sep 10 17:32:34 UTC 2015

A few dozen? Damn, you are lucy, Mike!

I did an install the other day, a good 60-70 XfinityWifi SSIDs popped up.

Reminds me of the Good 'Ole CB days back in the 80's where everyone talked
over each other and played background music and such...

That's a big 10-4 and I got a Smokey on my trail!

-Mike

On Thu, Sep 10, 2015 at 10:15 AM, Mike Hammett <nanog at ics-il.net> wrote:

> The tower-deployed AP can see the cable wireless APs for miles and can see
> a few dozen of them at any one time. Given the goal of full modulation at
> all times for optimal use of spectrum and dollars, the ever increasing
> noise from the cable APs makes this a challenge. You need 25 to 30 dB to
> maintain full modulation and that's increasingly difficult when you hear
> cable APs everywhere at -70.
>
> The APs can't have narrow radiation patterns given that they need to cover
> a roughly 90* area of where the customers are. An 18 to 20 dB gain sector
> antenna will pick up those cable radios from pretty far away.
>
>
>
>
> -----
> Mike Hammett
> Intelligent Computing Solutions
> http://www.ics-il.com
>
>
>
> Midwest Internet Exchange
> http://www.midwest-ix.com
>
>
> ----- Original Message -----
>
> From: "Scott Helms" <khelms at zcorum.com>
> To: "Jared Mauch" <jared at puck.nether.net>
> Cc: "Mike Hammett" <nanog at ics-il.net>, "Corey Petrulich" <
> Corey_Petrulich at cable.comcast.com>, "Kenneth Falkenstein" <
> Ken_Falkenstein at cable.comcast.com>, "NANOG mailing list" <nanog at nanog.org>
> Sent: Thursday, September 10, 2015 10:00:41 AM
> Subject: Re: WiFI on utility poles
>
>
> This sounds like a hypothetical complaint, AFAIK none of the members of
> the CableWiFi consortium are deploying APs outside of their footprint.
> Since most of the APs use a cable modem for their backhaul it's not really
> feasible to be without at least one broadband option (the cable MSO) and be
> impaired by the CableWiFi APs.
>
>
> Now, there is one potential exception to this I'm aware of which is
> Comcast's Xfinity on Campus service, but I'd expect the number of colleges
> they're servicing that aren't already getting cable broadband service to
> approach zero.
>
>
>
> http://www.philly.com/philly/business/20150909_Comcast_streams_onto_college_campuses.html
>
>
>
> https://xfinityoncampus.com/login
>
>
>
>
>
> Having said all of that, I'd agree that a good radio resource management
> approach would benefit all of us, including the CableWiFi guys.
>
>
> http://www.cablelabs.com/wi-fi-radio-resource-management-rrm/
>
>
>
>
>
>
>
> Scott Helms
> Vice President of Technology
> ZCorum
> (678) 507-5000
> --------------------------------
> http://twitter.com/kscotthelms
> --------------------------------
>
>
> On Thu, Sep 10, 2015 at 10:52 AM, Jared Mauch < jared at puck.nether.net >
> wrote:
>
>
>
> > On Sep 10, 2015, at 9:00 AM, Mike Hammett < nanog at ics-il.net > wrote:
> >
> > 5 GHz noise levels affecting people whose primary means of Internet
> access is via fixed wireless .
> >
>
> This is a huge deal for those people like myself that depend on fixed
> wireless for access at home because there is no broadband available despite
> incentives given by cities and states and the federal government.
>
> The local WISPs are good at coordinating access in these ISM bands amongst
> themselves but when someone appears with a SSID without doing a peek at the
> spectrum (note: not a site survey, but actual spectrum view w/ waterfall,
> as site survey only checks for the channel width that the client radio is
> configured for, not al the 10, 15, 8, 30mhz wide variants).
>
> It’s just poor practice to show up and break something else because you
> can’t be bothered to notice the interference or noise floor you created. I
> suspect the hardware that Comcast is using doesn’t notice this interference
> or adjacent channel issues. With the FCC aiming to let cell carriers also
> clog the 5ghz ISM band it’s only going to get worse.
>
> - Jared
>
>
>
>

-- 
Mike Lyon
408-621-4826
mike.lyon at gmail.com

http://www.linkedin.com/in/mlyon