N has a number of advantages… Better spread, the ability to take advantage of polarization, better use of MIMO, and IIRC, a better encoding scheme that allows denser constellation points (more bits per signaling element).
N on 5Ghz takes advantage of the increased bandwidth of the 5Ghz channel where A merely replicated G on 5Ghz for all practical purposes. Owen On Feb 25, 2013, at 8:42 AM, Warren Bailey <wbai...@satelliteintelligencegroup.com> wrote: > I should probably know this, but doesn't N just spread better and have the > ability to send receive on multiple polarizations? As an RF engineer I should > probably know this, but I can't think of many people in my industry who > really care about 802.11_. I really don't even use wireless in my house, > though it's generally due to overcrowding the spectrum in populous areas. > > > From my Android phone on T-Mobile. The first nationwide 4G network. > > > > -------- Original message -------- > From: Owen DeLong <o...@delong.com> > Date: 02/25/2013 8:38 AM (GMT-08:00) > To: Frank Bulk <frnk...@iname.com> > Cc: NANOG <nanog@nanog.org> > Subject: Re: 10 Mbit/s problem in your network > > > Correct. However, while A is 5Ghz (only), it's not significantly better than > G. > > The true performance gains come from 5Ghz and N together. N on 2.4Ghz has > limited benefit over G. N on 5Ghz is significantly better. > > Owen > > On Feb 24, 2013, at 8:56 PM, "Frank Bulk" <frnk...@iname.com> wrote: > > > The IEEE 802.11n standards do not require 5 GHz support. It's typical, but > > not necessary. > > > > Frank > > > > -----Original Message----- > > From: Owen DeLong [mailto:o...@delong.com] > > Sent: Sunday, February 17, 2013 2:07 PM > > To: Jay Ashworth > > Cc: NANOG > > Subject: Re: 10 Mbit/s problem in your network > > > > > > On Feb 17, 2013, at 08:33 , Jay Ashworth <j...@baylink.com> wrote: > > > >> ----- Original Message ----- > >>> From: "Scott Howard" <sc...@doc.net.au> > >> > >>>> A VPN or SSH session (which is what most hotel guests traveling for > >>>> work will do) won't cache at all well, so this is a very bad idea. > >>>> Might improve some things, but not the really important ones. > >>> > >>> The chances of the average hotel wifi user even knowing what SSH means > >>> is close to zero. > >> > >> {{citation-needed}} > >> > >>> As an aside, I was sitting in JFK airport (terminal 4) a few days ago and > >>> having a shocking time getting a good internet connection - even from my > >>> own Mifi. I fired up inSSIDer, and within a few seconds it had detected > >>> 122 AP's... > >> > >> Yup; B/G/N congestion is a real problem. Nice that the latest generation > >> of both mifi's and cellphones all seem to do A as well, in addition to > >> current-gen business laptops (my x61 is almost 5 years old, and speaks A). > >> > > > > 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. > > > > Owen > > > > > > > >
