[160879] in North American Network Operators' Group
Re: 10 Mbit/s problem in your network
daemon@ATHENA.MIT.EDU (joel jaeggli)
Sun Feb 17 19:18:02 2013
Date: Sun, 17 Feb 2013 16:17:40 -0800
From: joel jaeggli <joelja@bogus.com>
To: Jay Ashworth <jra@baylink.com>, NANOG <nanog@nanog.org>
In-Reply-To: <21152885.6381.1361132336307.JavaMail.root@benjamin.baylink.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2/17/13 12:18 PM, Jay Ashworth wrote:
> ----- Original Message -----
>> From: "Owen DeLong" <owen@delong.com>
>> I think by A you actually mean 5Ghz N. A doesn't do much better than G, though
>> you still have the advantage of wider channels and less frequency congestion
>> with other uses.
> No, my ThinkPad doesn't *do* N, 5GHz or otherwise. Neither does my Sprint
> EVO, nor, as near as I can tell, the Galaxy S4 I'm going to replace it
> with this year (though on that one, I'm a tad less certain).
>
> I'd forgotten that N was dual band, though, yes. I can't say I've ever
> needed the extra bandwidth N provides, personally, though certainly the
> hotels we've been discussing might need more to share around.
entirely orthonal to the frequency band used spatial division
multipluxing as used by 802.11n is generally going to increase the SNR.
so what you get out of A/N is:
* more non-overlapping bands and therefore a much easier map coloring
problem)
* greater attentuation, which implies more limited range, but also less
interferance.
* with N-mimo higher SNR if you have >= 2 antennas
All of those things make the 5Ghz band a more attractive alternative for
lots of applications. given that it's 5Ghz it also requires more power,
which is a problem for cellphones, but not so much for tablets and laptops.
> Cheers,
> -- jra
